Papers - Terasaka, Koichi

Combustion Characteristics of Biodiesel Fuel Mixed with Fine Bubbles in a High-Speed Diesel Engine

Jyumpei OBATA, Yasuhiro NAKATAKE, Tadakazu TANINO, Koichi TERASAKA

Journal of JSEM (The Japanese Society for Experimental Mechanics)   2025.05

Last author

酸素混合スチームの連続急速凝縮によるウルトラファインバブル水製造

田口 虹太, Rahimian Benjamin, 寺坂 宏一, 藤岡 沙都子, Schlüter Michael

Japanese Journal of Multiphase Flow (The Japanese Society for Multiphase Flow)  38 ( 3 ) 299 - 304 2024.09

Research paper (scientific journal), Corresponding author

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Development of a portable device for the viscosity measurement of non-Newtonian fluids based on pressurized laminar flow

Nobuaki IKEDA, Daisuke FUNAYAMA, Satoko FUJIOKA, Koichi TERASAKA

Japanese Journal of Multiphase Flow (The Japanese Society for Multiphase Flow)  38 ( 3 ) 269 - 280 2024.09

Research paper (scientific journal), Last author,  ISSN  0914-2843

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A Simplified Model for Predicting Changes to Ultrafine Bubble Size Distributions under Flowing Conditions

Kurumi NAKAJIMA, Hanako SASAKI, Adam DONALDSON, Koichi TERASAKA, Satoko FUJIOKA

Japanese Journal of Multiphase Flow (The Japanese Society for Multiphase Flow)  38 ( 3 ) 281 - 288 2024.09

Research paper (scientific journal), Corresponding author,  ISSN  0914-2843

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Engineering pH-Responsive, Self-Healing Vesicle-Type Artificial Tissues with Higher-Order Cooperative Functionalities

Kojima T., Noguchi Y., Terasaka K., Asakura K., Banno T.

Small 20 ( 30 )  2024.07

ISSN  16136810

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Multicellular organisms demonstrate a hierarchical organization where multiple cells collectively form tissues, thereby enabling higher-order cooperative functionalities beyond the capabilities of individual cells. Drawing inspiration from this biological organization, assemblies of multiple protocells are developed to create novel functional materials with emergent higher-order cooperative functionalities. This paper presents new artificial tissues derived from multiple vesicles, which serve as protocellular models. These tissues are formed and manipulated through non-covalent interactions triggered by a salt bridge. Exhibiting pH-sensitive reversible formation and destruction under neutral conditions, these artificial vesicle tissues demonstrate three distinct higher-order cooperative functionalities: transportation of large cargoes, photo-induced contractions, and enhanced survivability against external threats. The rapid assembly and disassembly of these artificial tissues in response to pH variations enable controlled mechanical task performance. Additionally, the self-healing property of these artificial tissues indicates robustness against external mechanical damage. The research suggests that these vesicles can detect specific pH environments and spontaneously assemble into artificial tissues with advanced functionalities. This leads to the possibility of developing intelligent materials with high environmental specificity, particularly for applications in soft robotics.

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Extraction of 5-Hydroxymethylfurfural under Hydrogen Peroxide in Liquid–Liquid Slug Flow of Water / Methylisobutylketone Biphasic System and Effect of Hemin

Shimanouchi T., Sanagi S., Fujioka S., Terasaka K., Kimura Y.

Solvent Extraction Research and Development, Japan 31 ( 2 ) 67 - 75 2024

ISSN  13417215

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微細なバブルに関するサイエンスの発展

寺坂宏一

表面と真空 (日本表面真空学会)  66 ( 11 ) 629 - 630 2023.11

Research paper (scientific journal)

ファインバブルの基礎と食品工学への適用

寺坂宏一

食品機械装置 (食品機械装置)  711 ( 11 ) 10 - 15 2023.11

Photoinduced phase transition between vesicles and coacervates using low-molecular-weight catanionic amphiphiles

Kojima T., Terasaka K., Asakura K., Banno T.

Colloids and Surfaces A: Physicochemical and Engineering Aspects (Colloids and Surfaces A: Physicochemical and Engineering Aspects)  669 2023.07

ISSN  09277757

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Amphiphiles form various molecular self-assemblies in the aqueous phase, such as vesicles and coacervates, depending on molecular properties. Recently, phase transitions between vesicles and coacervates have drawn much attention because the switching between “closed” and “open” compartments could achieve the controllability of molecular sequestrations. We expect that the photoinduced drastic change in the molecular structure of catanionic amphiphiles comprising azobenzene-containing cationic amphiphiles (Azo) and anionic sodium dodecyl sulfate causes the transition. Self-assemblies prepared by a thin-film hydration method were observed using microscopy under UV and subsequent visible-light illumination. Additionally, investigation of selectivity for molecular sequestration and assay of enzymatic reactions in the self-assemblies were conducted. Photoinduced reversible phase transitions between vesicles and coacervates occurred owing to the photoisomerization of Azo. The formed coacervates had selectivity for molecular sequestration. Additionally, the transition achieved fusion of different vesicles via coacervates. Although coacervates are generally known to facilitate enzymatic reactions, the reactions were inhibited in the presence of the formed self-assemblies due to the deactivation of enzymes. Our results represent rapid and non-invasive systems of reversible vesicle–coacervate transitions. Furthermore, the findings provide a new aspect of coacervates in which catanionic low-molecular-weight amphiphiles could act as suppressors of chemical reactions.

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Ultrafine bubble generation by rapid condensation of mixed vapor of non-condensable gas and steam

Terasaka K., Taguchi K., Tetsuka T., Fujioka S.

Chemical Engineering Science (Chemical Engineering Science)  263 2022.12

ISSN  00092509

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Although the mechanism of ultrafine bubble generation has not yet been elucidated, we believe that the state of gas-saturated water before the generation of ultrafine bubbles is the most important factor in the mechanism of ultrafine bubble generation. Therefore, we proposed the hypothesis that the spatial distribution of dissolved gas molecules among the water molecules before the ultrafine bubble formation is stared has a significant effect on the formation of ultrafine bubble suspending water. Based on this hypothesis, we succeeded in generating ultrafine bubbles of sufficient number concentration in the condensate by rapidly condensing a well mixture of non-condensable gas and vapor by cooling. The number concentration of the generated ultrafine bubbles increased almost in proportion to the condensation rate of the vapor. Therefore, it was found that promoting the formation of bubble nuclei from dissolved gas molecules existing between water molecules in the condensate and suppressing bubble growth led to an increase in the number concentration of ultrafine bubbles. The principle of ultrafine bubble generation in this invention not only simplifies the generation of ultrafine bubble water but also enables the control of the number concentration of ultrafine bubbles in water.

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Enhanced enzyme stability and gas utilization by microbubble aeration applying microporous aerators

Benjamin Thomas, Daniel Ohde, Simon Matthes, Paul Bubenheim, Koichi Terasaka, Michael Schlüter, Andreas Liese

Catalysis Science & Technology (The Royal Society of Chemistry)  13 ( 4 ) 1098 - 1110 2022.12

Research paper (scientific journal),  ISSN  20444753

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During the optimization of processes in biocatalysis, the limitations of mass transfer and enzyme stability have to be overcome. To achieve these goals, aeration with microbubbles is advantageous by providing favorable properties, which include high gas utility, low-pressure drop, and reduced foam formation. In this study, the influences of microbubble, classic sub-millibubble and macrobubble aeration on enzyme stability and gas utility are compared. Using five enzymes, the half-life was investigated by comparing the microbubble aeration with a 2 μm porous sintered frit to the macrobubble aeration with a 5 mm open pipe, both adjusted to provide a constant kLa of 160 h−1. Furthermore, the half-life of a glucose oxidase was investigated by variation of the kLa in the range of 40 to 350 h−1 and the mode of the aeration system comparing the 2 μm and 10 μm sintered frit as well as the 5 mm open pipe. In both experimental set-ups, it was demonstrated that the aeration with microbubbles using the 2 μm sintered frit was beneficial for reaching high levels of enzyme stability. From this, we discovered that the interfacial area renewal rate plays an important role in the process of enzyme deactivation, which changes depending on the aeration mode.

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超純水中の空気ウルトラファインバブルの保存、輸送、濃縮、希釈及び除去

寺坂宏一, 田中俊也

混相流 (日本混相流学会)  36 ( 1 ) 4 - 11 2022.04

Research paper (scientific journal), Joint Work, Lead author

鉄道各所へのウルトラファインバブル水の応用* （ブラシ洗浄機による洗浄効果とクロス拭き時の摩擦低減効果）

鈴木隆起, 赤対秀明, 秦 隆志, 西内悠祐, 多田佳織, 早水庸隆, 藤井貴敏, 氷室昭三, 寺坂宏一

混相流 (日本混相流学会)  36 ( 1 ) 28 - 35 2022.04

Research paper (scientific journal), Last author

Microbubble generation with rapid dissolution of ammonia (NH3)-hydrogen (H2) mixed gas fed from a nozzle into water

T. Kobayashi, S. Fujioka, S. Tanaka, K. Terasaka

Chemical Engineering Science (Chemical Engineering Science)  248 2022.02

ISSN  00092509

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Because of their useful characteristics, microbubbles attracted much interest in industry and medicine. In this study, we developed a novel method of generating microbubbles through the chemical absorption of ammonia (NH3). By using an ultrahigh-speed camera, consecutive images of bubble formation were captured, and the microbubble generation mechanism was investigated. The effects of the gas flow rate and ammonia concentration in the liquid phase on the size of the microbubbles were examined. The hydrogen (H2) gas flow rate was found not to demonstrate a significant effect on the bubble diameter. The diameter of the microbubbles increased as the superficial velocity of the gas mixture (NH3 – H2) decreased.

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Unique properties of fine bubbles in the electrochemical reduction of carbon dioxide using boron-doped diamond electrodes

Tomisaki M., Natsui K., Fujioka S., Terasaka K., Einaga Y.

Electrochimica Acta (Electrochimica Acta)  389 2021.09

ISSN  00134686

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The electrochemical CO2 reduction on boron-doped diamond (BDD) electrodes in an aqueous solution with fine bubbles was studied. The overpotential decreased and the production of carbon monoxide was promoted in the CO2 reduction with fine bubbles compared to that without fine bubbles. It is suggested that fine bubbles in solution could facilitate the mass transport and also act as the catalyst for producing carbon monoxide. Potential-dependent in-situ attenuated total reflectance-infrared (ATR-IR) measurements confirmed the catalytic activity, showing that in solutions with CO2 fine bubbles the CO2•– intermediate or the CO2 molecules themselves become stabilized near the electrode and these can be adsorbed on the electrode surface more easily compared to using solutions without CO2 fine bubbles. The reported work is a first step in understanding the effects of fine bubbles in CO2 reduction reactions.

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Destabilization of ultrafine bubbles in water using indirect ultrasonic irradiation

Tanaka S., Kobayashi H., Ohuchi S., Terasaka K., Fujioka S.

Ultrasonics Sonochemistry (Ultrasonics Sonochemistry)  71 2021.03

ISSN  13504177

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© 2020 The Authors Ultrafine bubble (UFB) is a bubble with a diameter of less than 1 μm. Little attention has been paid to the defoaming and removal of UFBs. This study proposes a method to destabilize UFBs by using indirect ultrasonic irradiation. Besides, the destabilization mechanism of UFB was investigated. The ultrasonic frequency was 1.6 MHz and the dissipated power was 30 W. UFB dispersions were prepared using two different types of bubble generators: pressurized dissolution method and swirling liquid flow method. The effects of ultrasonic irradiation on the stability of UFBs were evaluated by particle tracking analysis (PTA) and electrophoretic zeta potential measurement. Results showed that the indirect ultrasonic irradiation for 30 min reduced the number concentration of UFBs by 90% regardless of the generation method. This destabilization was attributed to a decrease in the magnitude of zeta potential of UFBs due to the changes in pH and electrical conductivity. These changes in the electrochemical properties were caused by the formation of nitric acid. To study the destabilization mechanism, the pH of the UFB dispersions were modified by titration; the chemical and mechanical effects of ultrasound were separately examined. It was found that not only the chemical effect caused by the formation of nitric acid but also the mechanical effect contributed to the destabilization of UFB. Feasibility studies were also performed for UFBs in an aqueous surfactant solution and UFBs in a solid particle dispersion. The proposed method selectively destabilized UFBs in the solutions.

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Microbubble enhanced mass transfer efficiency of CO<inf>2</inf>capture utilizing aqueous triethanolamine for enzymatic resorcinol carboxylation

Ohde D., Thomas B., Matthes S., Tanaka S., Bubenheim P., Terasaka K., Schlüter M., Liese A.

RSC Advances (RSC Advances)  11 ( 7 ) 4087 - 4096 2021.01

Research paper (scientific journal)

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The present study focuses on the aeration of aqueous triethanolamine acting as reaction medium for biocatalytic carboxylations. For enhancing mass transfer in a bubble column reactor, microbubble aeration is applied and compared to conventional macrobubble aeration. Application of a 0.5 μm porous sparger enables microbubble CO2 aeration with bubble size distributions below 150 μm in Sauter mean diameter, correlating with the highest measured mass transfer rates. During CO2 saturation of the aqueous triethanolamine, bubble size distributions changed according to the level of CO2 saturation. For microbubbles, less foaming was observed compared to macrobubble aeration by a 10 μm porous sparger. This microbubble effect is attributed to their accelerated dissolution assisted by the Laplace pressure lowering the amount of bubbles reaching the surface of the liquid. The experiments reveal that the rate of interfacial area generation, which is calculated based on measured bubble size distributions, influences the biocatalyst activity.

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Comparative investigation of fine bubble and macrobubbleaeration on gas utility and biotransformation productivity

B, Thomas, D. Ohde, S, Matthes, C. Engelmann, P. Budenheim, K. Terasaka, M. Schlueter, A. Liese

Biotechnology and Bioengineering (Biotechnology and Bioengineering)  118 ( 1 ) 130 - 141 2021

Research paper (scientific journal), Joint Work,  ISSN  00063592

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The sufficient provision of oxygen is mandatory for enzymatic oxidations in aqueoussolution, however, in process optimization this still is a bottleneck that cannot beovercome with the established methods of macrobubble aeration. Providing highermass transfer performance through microbubble aerators, inefficient aeration canbe overcome or improved. Investigating the mass transport performance in a modelprotein solution, the microbubble aeration results in higher kLa values related to theapplied airstream in comparison with macrobubble aeration. Comparing the aera-tors at identical kLa of 160 and 60 1/h, the microbubble aeration is resulting in 25and 44 times enhanced gas utility compared with aeration with macrobubbles. Toprove the feasibility of microbubbles in biocatalysis, the productivity of a glucoseoxidase catalyzed biotransformation is compared with macrobubble aeration as wellas the gassaving potential. In contrast to the expectation that the same pro-ductivities are achieved at identically applied kLa, microbubble aeration increasedthe gluconic acid productivity by 32% and resulted in 41.6 times higher oxygenutilization. The observed advantages of microbubble aeration are based on the largevolumespecific interfacial area combined with a prolonged residence time, whichresults in a high mass transfer performance, less enzyme deactivation by foamformation, and reduced gas consumption. This makes microbubble aerators favor-able for application in biocatalysis.

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ウルトラファインバブル水の国際輸送

田中俊也, 成瀬祐里, 寺坂宏一, 藤岡沙都子, 山本陽子, 野口雄介, 山崎京香, 庄村拓也, 原田駿

混相流 35 ( 1 ) 185 - 196 2021

Ultrafine Bubbles

K. Terasaka, K. Yasui, W. Kanematsu, N. Aya

Jenny Stanford Publishing  2021

ISSN  979- 981-487-7596

空気微細気泡A重油による高速ディーゼル機関の燃費とNOX低減

山下裕史,工藤達司,中武靖仁,田中大,川原秀夫,寺坂宏一,河原寛,後藤英親

日本マリンエンジニアリング学会誌 56 ( 4 ) 152 - 158 2021

Experimental study and prediction by computational fluid dynamics on self-induced sloshing due to bubble flow in a rectangular vessel

Aoki R., Fujioka S., Terasaka K.

Journal of Chemical Engineering of Japan (Journal of Chemical Engineering of Japan)  54 ( 2 ) 51 - 57 2021

ISSN  00219592

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Self-induced sloshing is an oscillatory phenomenon of a free liquid surface due to the flow of a fluid. This phenomenon has been reported in some gas–liquid reactors, and it is important to predict and prevent its occurrence for the safe operation of the reactors. However, the fundamental knowledge on the self-induced sloshing by bubble flow, such as the frequency and amplitude, is insufficient, and the occurrence condition has not been clarified. The purpose of this study is to investigate the characteristics of self-induced sloshing by bubble flow experimentally. We attempt to reproduce self-induced sloshing by using computational fluid dynamics (CFD) and establish a CFD model for the prediction of the occurrence of self-induced sloshing. In the experiments, air bubbles were dispersed into a liquid from the bottom of a rectangular vessel. The effects of the air flow rate and static liquid height on the characteristics of self-induced sloshing were investigated experimentally by image analysis. The occurrence of self-induced sloshing was confirmed by increasing the airflow rate at a specific static liquid height. The amplitude reached a maximum at the static liquid height, where self-induced sloshing was most likely to occur, and the frequency decreased with increasing static liquid height. Next, in order to reproduce the self-induced sloshing through CFD, an appropriate drag model of the bubbles was selected. Although the amplitude was overestimated due to the absence of the foam layer, the predicted frequency agreed well with the experimental value. Finally, the movement of the circulation flow was analyzed, and its correlation with the self-induced sloshing was clarified.

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Characterization of water/organic biphasic system in liquid-liquid slug flow under hydrothermal conditions: Solvation, vorticity, and hydrophobicity

Shimanouchi T., Fujioka S., Tanifuji T., Yamamoto K., Terasaka K., Kimura Y.

Solvent Extraction Research and Development (Solvent Extraction Research and Development)  28 ( 1 ) 21 - 35 2021

ISSN  13417215

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The microcapillary was combined with the liquid-liquid slug flow to build the separation field. The partition behavior of seventeen kinds of substrates was investigated by using six kinds of water/organic biphasic systems under hydrothermal conditions (25 - 190° C at 10 MPa). The scale of hydrophobicity (HF) of water/organic biphasic system was estimated. The HF value for the biphasic system used here was comparable to the conventional aqueous two-phase systems and depended on the (de)solvation of substrates by water and organic solvent. Besides, the vortex field in the slug contributed to the enhanced mass transfer of substrates. Those results are available for the selection of water/organic biphasic system as the reactive separation of target materials.

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加減圧の繰り返し操作による水中からのウルトラファインバブル生成

山崎京香,　寺坂宏一,　藤岡沙都子

混相流 (日本混相流学会)  34 ( 4 ) 532 - 540 2020.12

Research paper (scientific journal), Joint Work

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Hydrodynamic and Mass Transfer Correlation in a Microbubble Aerated Stirred Tank Reactor

Simon Matthes, Benjamin Thomas, Daniel Ohde, Marko Hoffmann, Paul Bubenheim, Andreas Liese, Shunya Tanaka, Koichi Terasaka, Michael Schlueter

the Journal of Chemical Engineering of Japan (JOURNAL OF CHEMICAL ENGINEERING OF JAPAN )  53 ( 10 ) 577 - 584 2020.10

ISSN  Print ISSN : 0021-9592

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© 2020 The Society of Chemical Engineers, Japan Many chemical and biocatalytic reactions are consuming gaseous species like oxygen, provided by the mass transfer across interfaces of multiphase contact apparatuses. For biocatalytic reactions a macroscopic aeration can lead to reduced enzyme activity by foaming and shear forces and for fast chemical reactions in multiphase flows, the mass transfer limitation is often the bottleneck for a process optimization. The present study investigates the use of bubbles with diameters less than 100 µm for aeration of a 3 L lab scale stirred tank reactor. For demineralized water and a solution of glucose and bovine serum albumin (BSA) as biocatalytic model protein solution, two different membrane spargers with a mean pore size of 1 µm and 2 µm are investigated. Determining the influence of the energy input on the hydrodynamics of the system, endoscopic measurements of bubble size distributions are carried out. The mass transfer performance of the two spargers is analyzed by measurements of the oxygen kla value for varying gas flow rates. As a result microbubble aeration shows a significant higher mass transfer performance compared to an open tube aeration saving 60% of the gaseous phase by reaching the same kla values. Besides high specific interfacial areas and long residance times, the Laplace pressure inside the bubble is identified as an enhancing force for mass transfer at microscale.

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Production of Oxygen Ultrafine Bubble Water with Spray Injection from a Pressurized Container

山崎京香,　寺坂宏一,　藤岡沙都子

混相流 (日本混相流学会)  34 ( 3 ) 436 - 443 2020.09

Research paper (scientific journal), Joint Work

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Generation and Long-Term Stability of Ultrafine Bubbles in Water

Tanaka S., Terasaka K., Fujioka S.

Chemie-Ingenieur-Technik (Chemie-Ingenieur-Technik)  93 ( 1-2 ) 168 - 179 2020

ISSN  0009286X

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© 2020 Wiley-VCH GmbH This study investigated submicron-sized bubbles, more precisely ultrafine bubbles (UFBs). The number concentration, size, and scattered light intensity of UFBs were measured by particle tracking analysis (PTA). The results showed that storage temperature had a significant effect, whereas the storage containers had little effect on the long-term stability of UFBs. It was found that the second-order aggregation rate equation could predict the stability of UFBs; however, there were some differences from the theory at high storage temperatures. The features of the PTA were also discussed in detail.

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Dissolution and Shrinking of a Single Microbubble in Stationary Liquid with Surfactants

Fujioka S., Mizuno K., Terasaka K.

Chemie-Ingenieur-Technik (Chemie-Ingenieur-Technik)  93 ( 1-2 ) 216 - 222 2020

ISSN  0009286X

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© 2020 Wiley-VCH GmbH For a variety of applications of microbubbles, it is necessary to clarify the dissolution dynamics and the lifetime of a microbubble. Although various models have been proposed, predicting the dissolution rate of a microbubble in a static fluid with a surfactant is still difficult. In this study, dissolution behavior was predicted with taking into account the mass transfer inhibition effect due to a surfactant at the bubble surface. The shrinking behavior of an oxygen microbubble was observed with several surfactants and the experimental results were in good agreement with model predictions.

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Concentration and dilution of ultrafine bubbles in water

Tanaka S., Naruse Y., Terasaka K., Fujioka S.

Colloids and Interfaces (Colloids and Interfaces)  4 ( 4 )  2020

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Submicron-sized bubbles are now officially called ultrafine bubbles (UFBs) by the international standard. The concentration of UFBs is generally low (<109 particles/mL; <0.001 vol%) compared to other colloidal dispersions. To overcome this practical problem, we concentrated UFBs in ultrapure water prepared by a commercial UFB generator and quantified the effect of rotary evaporation of the dispersion media on the stability of UFBs. The UFB dispersions were characterized by a particle tracking analysis (PTA) instrument. The experimental results showed that the UFBs can be diluted and concentrated without changing the size distribution and there was little or no loss of UFBs. By using a rotary evaporator, UFB dispersions were about 30-fold concentrated and the resultant number concentration reached over 3 × 1010 particles/mL. Increasing the concentration of UFBs allowed for satisfactory dynamic light scattering (DLS) measurements. The differences among the three algorithms for analyzing the raw data, i.e., autocorrelation function, obtained by DLS are discussed, along with the characteristics of the particle size distribution derived from each algorithm.

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Fine Bubble-based CO<inf>2</inf> Capture Mediated by Triethanolamine Coupled to Whole Cell Biotransformation

Ohde D., Thomas B., Matthes S., Percin Z., Engelmann C., Bubenheim P., Terasaka K., Schlüter M., Liese A.

Chemie-Ingenieur-Technik (Chemie-Ingenieur-Technik)  91 ( 12 ) 1822 - 1826 2019.12

ISSN  0009286X

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© 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Carbon capture technology can be set up in combination with biocatalysis to utilize the bound CO2 as substrate in the Kolbe-Schmitt like enzymatic reaction. The exemplary whole cell biotransformation of catechol to 2,3-dihydroxybenzoic acid in a triethanolamine-mediated multiphase system shows increased equilibrium conversion. Apart from the beneficial thermodynamics, the inherent fluid properties of triethanolamine is enabling easy application of CO2 fine bubbles as highly efficient gassing method to minimize the CO2 demand and CO2 emissions.

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Absorption of Carbon Dioxide at High Temperature with Molten Alkali Carbonate Using Bubble Column Reactor

Yugo Kanai, Koichi Terasaka, Satoko Fujioka, Kenichirou Fukunaga

Journal of Chemical Engineering of Japan (The Society of Chemical Engineers, Japan)  52 ( 1 ) 31 - 40 2019

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00219592

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© 2019 The Society of Chemical Engineers, Japan The purpose of this study is to examine the possibility of establishing a novel CO 2 absorption process with molten alkali carbonate using a bubble column reactor. In our previous study, a hot CO 2 recovery process using Li 4 SiO 4 suspended in molten Li 2 CO 3 -K 2 CO 3 was developed. In the process, molten alkali carbonate itself showed great potential for CO 2 absorption at high temperature. If a hot CO 2 absorption process were established using only molten alkali carbonate, it could make the system simpler and the operating temperature range could be extended without the limitation of reaction temperature of solid absorbent. In the study, molten Li 2 CO 3 , Na 2 CO 3 , K 2 CO 3 and its eutectic mixture were selected as CO 2 absorbent. A bubble column was chosen as the device for gas absorption at high temperature. First, the CO 2 absorption performance of each single molten alkali carbonate was investigated. The result showed that the molten Li 2 CO 3 had a great ability to absorb CO 2 at high temperature. Li 2 O was thought to be produced by decomposition of Li 2 CO 3 during the melting and purging process and a reaction of CO 2 with Li 2 O occurred during the absorption process. Further, the CO 2 absorption performance of eutectic mixture increased exponentially with increasing the ratio of Li 2 CO 3 in composition. Second, the possibility of establishing a CO 2 absorption process using molten Li 2 CO 3 was examined. The overall CO 2 absorption process in the bubble column was investigated and the experimental results showed that the mass transfer of CO 2 into molten Li 2 CO 3 was the rate-controlling step. The operational conditions of the bubble column were optimized. The superficial gas velocity was an important operational parameter that affected both the CO 2 absorption rate and total amount of CO 2 finally absorbed in the bubble column. The operating temperature also greatly affected the amount of absorbed CO 2 .

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Synthesis, kinetic study, and reaction mechanism of Li₄SiO₄ with CO₂ in a slurry bubble column reactor

Kanai Y., Terasaka K., Fujioka S.

Chemical Engineering Communications (Chemical Engineering Communications)  207 ( 5 ) 598 - 611 2019

ISSN  00986445

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© 2019, © 2019 Taylor & Francis Group, LLC. This study was performed to investigate the synthesis, kinetic and reaction mechanism of Li 4 SiO 4 with CO 2 in a slurry bubble column reactor. The Li 4 SiO 4 powder sample was prepared via a solid-state reaction. The sample was characterized via X-ray diffraction (XRD) analysis and verified as a single phase. The median diameter of the sample was measured using the laser diffraction and scattering method as about 20 μm. The synthesized sample was suspended in binary molten carbonate of Li 2 CO 3 –K 2 CO 3 having a molar ratio of 38:62. The experimental results show that Li 4 SiO 4 in the slurry bubble column absorbed approximately a stoichiometric amount of CO 2 . The kinetic study shows that the CO 2 reaction behavior on the Li 4 SiO 4 surface was fitted to a double exponential model and the limiting step of the reaction was lithium diffusion. The mass transfer coefficient of CO 2 and rate constant of reaction with Li 4 SiO 4 were studied to understand the overall absorption mechanism in the reactor. The resistance for the direct reaction of CO 2 on the Li 4 SiO 4 was much smaller than the resistance for the mass transfer of CO 2 to the Li 4 SiO 4 . We can conclude that the direct contact of CO 2 with Li 4 SiO 4 was the main path for the reaction.

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Mass transfer from freely rising microbubbles in aqueous solutions of surfactant or salt

Tanaka S., Kastens S., Fujioka S., Schlüter M., Terasaka K.

Chemical Engineering Journal (Chemical Engineering Journal)  387 2019

ISSN  13858947

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© 2019 Elsevier B.V. Microbubbles are used in many applications. One of the major advantages of using microbubbles is to improve the mass transfer of gases to the bulk phase. In this study, mass transfer from single microbubbles that rise in ultrapure water and aqueous solutions of surfactants (SDS, Pluronic F68) or salt (NaCl) was investigated. The rising and dissolution behaviors of single air microbubbles were observed using a high-speed imaging technique by which the rising velocity, U B , and the mass transfer coefficient, k L , were optically evaluated. We found that the rising velocity of microbubbles obeys Stokes’ law, indicating that the surface of the microbubbles used in this study is immobile, despite their rising in ultrapure water. The obtained mass transfer coefficients were in good agreement with those predicted by Ranz and Marshall's correlation for the Sherwood number, Sh. Using the two correlations for U B and Sh, a theoretical model that describes the mass transfer from a microbubble was constructed. The proposed model can predict the dissolution of single microbubbles rising in ultrapure water and aqueous solutions with an accuracy of ±10% in terms of dissolution time.

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Fine bubble based CO2 capture mediated by triethanolamine coupled to whole cell biotransformation

Andreas Liese, Michael Schlueter, Koichi Terasaka

Chemie Ingenieur Technik   2019

Research paper (scientific journal), Joint Work

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ファインバブルテクノロジーの発展と展望

Terasaka Koichi

粉体技術 (一般社団法人日本粉体工業技術協会)  10 ( 11 ) 44 - 48 2018.11

Research paper (scientific journal), Single Work,  ISSN  1883-3292

Research on Cleaning and Purification Using Fine Bubbles

#HTakashi Hata, Yusuke Nishiuchi, Katsuya Tanaka, Yuriko Okamura, Yasushi Sakakibara, Koichi Terasaka

Japanese Journal of Multiphase Flow (The Japanese Society for Multiphase Flow)  32 ( 1 ) 4 - 11 2018

Research paper (scientific journal), Joint Work

超音波刺激によるウルトラファインバブルからマイクロバブルへの変化

Terasaka Koichi

日本ソノケミストリー 11 ( 1 ) 1 - 8 2017.03

The Establishment of Experimental Method to Observe Bubble Formation in High Temperature Molten Salt System and Estimation of Generated Bubble Size

Y. Kanai, K. Terasaka, S. Fujioka and K. Suzukawa J. Chem. Eng. Japan, Vol.50(2), pp.86-93 (2017)

J. Chem. Eng. Japan (J. Chem. Eng. Japan)  50 ( 2 ) 86 - 93 2017.02

Research paper (scientific journal), Joint Work,  ISSN  0021-9592

• Access to Document (DOI)

Smaller Bubble Formation from a Horizontally Oscillation Nozzle

Daijiro MurakamiKoichi Terasaka, Satoko Fujioka

Japanese Journal of Multiphase Flow (The Japanese Society for Multiphase Flow)  31 ( 4 ) 422 - 426 2017

Research paper (scientific journal), Joint Work

Mass Transfer from a Shrinking Single Microbubble Rising in Water

Motoki IwakiriKoichi Terasaka, Satoko Fujioka, Michael Schluter, Sven Kastens, Shunya Tanaka

Japanese Journal of Multiphase Flow (The Japanese Society for Multiphase Flow)  30 ( 5 ) 529 - 535 2017

Research paper (scientific journal), Joint Work

ファインバブルの現状と将来展望

Terasaka Koichi

Japanese Journal of Multiphase Flow (The Japanese Society for Multiphase Flow)  30 ( 1 ) 1 - 2 2016.03

Research paper (scientific journal), Single Work

Chemical Conversion and Liquid-Liquid Extraction of 5-Hydroxymethylfurfural Fructose by Slug Flow Microreactor

Toshinori Shimanouti, Satoko Fujioka, Yoshitaka Kataoka, Tanifuji Tatsuya, Terasaka Koichi

AlChE Journal (American Institute of Chemical Engineers)   2016.01

Joint Work

• Access to Document (DOI)

Estimation of total oxygen transfer into aeration tank

K. SHIBATA, Koichi TERASAKA, S. FUJIOKA and K. KATO

Journal of Chemical Engineering of Japan 49 ( 7 ) 588 - 594 2016

Joint Work

Oxygen transfer from a free surface and dispersed bubbles in an aeration tank

K. SHIBATA*, Koichi TERASAKA, S. FUJIOKA and K. KATO

Journal of Chemical Engineering of Japan  2016

Joint Work

食用油精製プロセスへのマイクロバブル技術の応用

Terasaka Koichi

杉山産業化学研究所年報 (一般財団法人　杉山産業化学研究所)  0914 ( 4455 ) 62 - 65 2015.10

Research paper (bulletin of university, research institution), Joint Work

ファインバブルの創り方と使い方

Terasaka Koichi

第5回CSJ化学フェスタ2015　プログラム集 (日本化学会)     244 - 244 2015.10

Research paper (scientific journal), Single Work

マイクロバブルを用いた汚泥廃水処理

Terasaka Koichi

化学工学 (化学工学会)  78 ( 9 ) 600 - 603 2014.09

Research paper (scientific journal), Joint Work

Trends and challenges of Fine Bubble Technologies

Koichi Terasaka

Journal of Chemical Engineering of Japan (Chemical Engineering of Japan)  78 ( 9 ) 580 - 584 2014.09

Research paper (scientific journal),  ISSN  0375-9253

Report of the 5th Seminar of Fine Bubble Technology

Terasaka Koichi

Japanese J. Multuphase Flow (日本混相流学会)  27 ( 5 ) 110 - 113 2014.03

Water / Methyl isobutyl ketone (MIBK) Biphasic System in Slug Flow under High Temperature and Pressure Conditions

T. Shimanouchi, T. Tanifuji, S. Fujioka, K. Terasaka and Y. Kimura

Solvent Extraction Research and Development Japan (Solvent Extraction Research and Development)  21 ( 2 ) 201 - 209 2014.02

Research paper (scientific journal), Joint Work

Mass transfer in molten salt and suspended molten salt in bubble column

Yugo Kanai,Ken-ichiro Fukunaga,Koichi Terasaka,Satoko Fujioka

Chemical Engineering Science 100   153–159 2013.08

Research paper (scientific journal), Joint Work, Accepted

Fundamentals, Applications and Challenges of Fine Bubble Technology

Terasaka Koichi

粉体技術 (一般社団法人 日本紛体工業技術協会)  5 ( 8 ) 38(722) - 43(727) 2013.08

Single Work

Recovery of resources in water and purification of solid surface with fine bubble

Terasaka Koichi

GSCN News Letter (Green & Sustainable Chemistry Network)  47 2013.04

ナノバブル・マイクロバブルを信頼性のある技術にするために必要なことは？

Koichi Terasaka

川崎産学連携ニュースレター (川崎市産業振興財団　新産業振興課)  33 2013.03

Research paper (other academic), Single Work

Oxygen Transfer into Xanthan Solutions in Partitioned Bubble Columns

Koichi Terasaka, Junya Nitta, Hisashi Fukuda, Misa Iwahashi, Takashi Goshima, Satoko Fujioka

Journal of Chemical Engineering of Japan 46 ( 1 ) 33-39 2013

Research paper (scientific journal), Joint Work, Accepted

超音波によるマイクロバブルの凝集と再分散

Daisuke Kobayashi, Terasaka Koichi

日本音響学会誌 69 ( 11 ) 597 - 602 2013

Mass Transfer in Molten Salt and Suspended Molten Salt in Bubble Column

Yugo Kanai,Ken-ichiro Fukunaga, Koichi Terasaka,Satoko Fujioka,

Chemical Engineering Science  2012.11

Research paper (scientific journal), Joint Work, Accepted

Development of Multislit Submilli-Bubble Distributor for Gas Absorption

Satoko Fujioka; Kumi Kaneko; Koichi Terasaka; Yoshihito Sasada; Takashi Goshima; Daisuke Kobayashi

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 45 ( 9 ) 691 - 695 2012.09

Joint Work

気泡・液滴・微粒子分散工学分科会の紹介と最近の活動

Koichi Terasaka

化学工学 (化学工学会)  76 ( 6 ) 308-311 2012.06

Research paper (scientific journal), Single Work

第3回ナノバブル・マイクロバブル技術講習会報告

Koichi Terasaka

混相流 26 ( 1 ) 85-89 2012.03

Research paper (conference, symposium, etc.), Single Work

（総説）マイクロバブル・ナノバブルの食品・農業分野への応用、特集マイクロバブル・ナノバブルの最新動向

Koichi Terasaka

月刊ファインケミカル (シーエムシー出版)  41 ( 2 ) 5-6 2012.01

Research paper (scientific journal), Single Work

Gas and Liquid Two-phase Flow Injected Directly into Vertical Mini-channel

Takashi Goshima, Koichi Terasaka, Satoko Fujioka

Journal of Chemical Engineering of Japan, Special Issue for Multiscale Multiphase Process Engineering (MMPE) 2011 45 ( 9 ) 696-702 2012

Research paper (scientific journal), Joint Work, Accepted

Development of Multi-slit Type Submilli-bubble Distributor for Gas Absorption

Satoko Fujioka, Kumi Kaneko, Koichi Terasaka, Yoshito Sasada, Takashi Goshima and Daisuke Kobayashi

Journal of Chemical Engineering of Japan 45 ( 9 ) 691-695 2012

Research paper (scientific journal), Joint Work, Accepted

Development of Slurry Bubble Column with Lithium Silicate to Recover Hot CO2 Gas from Flue Gas

Yugo Kanai, Koichi Terasaka, Masato Swabe, Satoko Fujioka, Daisuke Kobayashi

Journal of Chemical Engineering of Japan 45 ( 9 ) 639-644 2012

Research paper (scientific journal), Joint Work, Accepted

シリーズ＜新しい化学工学＞①流体移動解析,「３　混相流」

Koichi Terasaka

シリーズ＜新しい化学工学＞① (朝倉書店)     71-74 2011.11

Research paper (scientific journal), Single Work

溶融塩スラリーを用いた燃焼ガスからの高温二酸化炭素分離回収

Koichi Terasaka, Yugo Kanai

ENEOS Technical Review (JX日鉱日石エネルギー株式会社)  53 ( 3 ) 6-10 2011.10

Research paper (scientific journal), Joint Work

Agglomeration and Coalescence Behavior of Microbubbles under Ultrasonic Irradiation

Daisuke Kobayashi; Yoshiyuki Hayashida; Kazuki Sano; Koichi Terasaka

Ultrasonics Sonochemistry 18 ( 5 ) 1193 - 1196 2011.09

Joint Work

Effect of Irradiation Distance on Degradation of Phenol Using Indirect Ultrasonic Irradiation Method

Daisuke Kobayashi, Kazuki Sano, Yusuke Takeuchi, Koichi Terasaka

ULTRASONICS SONOCHEMISTRY 18 ( 5 ) 1205-1210 2011.09

Research paper (scientific journal), Joint Work, Accepted

Agglomeration and Rapid Ascent of Microbubbles by Ultrasonic Irradiation

Daisuke Kobayashi, Yoshiyuki Hayashida, Kazuki Sano, Koichi Terasaka

ULTRASONICS SONOCHEMISTRY 18 ( 5 ) 1193-1196 2011.09

Research paper (scientific journal), Joint Work, Accepted

超音波照射によるマイクロバブルの凝集・合一挙動

Daisuke Kobayashi, Yoshiyuki Hayashida,Koichi Terasaka

化学工学論文集 37 ( 4 ) 291-295 2011.07

Research paper (scientific journal), Joint Work, Accepted

Development of microbubble aerator for waste water treatment using aerobic activated sludge

Koichi Terasaka, Ai Hirabayashi, Takanori Nishino, Satoko Fujioka, Daisuke Kobayashi

Chemical Engineering Science 66 ( 14 ) 3172-3179 2011.06

Research paper (scientific journal), Single Work

Submilli-bubble dispersion from a slit orifice into water

Koichi Terasaka, Yoshito Sasada, Daisuke Kobayashi, Satoko Fujioka

Journal of Chemical Engineering of Japan 44 ( 3 ) 140-145 2011.03

Research paper (scientific journal), Joint Work

Agglomeration and Coalescence Behavior of Microbubbles under Ultrasonic Irradiation

Daisuke Kobayashi; Yoshiyuki Hayashida; Koichi Terasaka

KAGAKU KOGAKU RONBUNSHU 37 ( 4 ) 291 - 295 2011

Joint Work

多岐にわたる分野へのマイクロバブル応用技術

Koichi Terasaka

オレオサイエンス (日本油化学会)  10 ( 9 ) 323-328 2010.09

Research paper (scientific journal), Single Work

HOT CO2 RECOVERY USING LITHIUM SILICATE SUSPENDED IN MOLTEN SALT

Yuta Ozaki, Yugo Kanai, Koichi Terasaka ,Daisuke Kobayashi

Journal of Chemical Engineering of Japan 43 ( 7 ) 546-552 2010.07

Research paper (scientific journal), Joint Work, Accepted

実用化を目指した大学での研究

Koichi Terasaka

分離技術 (分離技術会)  40 ( 3 ) 146-150 2010.05

Research paper (scientific journal), Single Work

積層スリット型サブミリバブル分散器の開発

Kumi Kaneko, Koichi Terasaka, Daisuke Kobayashi

化学工学シンポジウムシリーズ８１    21-28 2010.01

Research paper (scientific journal), Joint Work, Accepted

超音波照射によるマイクロバブルの動的挙動

Daisuke Kobayashi,Yoshiyuki Hayashida, Koichi Terasaka

化学工学シンポジウムシリーズ８１    13-19 2010.01

Research paper (conference, symposium, etc.), Joint Work, Accepted

スラリー気泡塔を用いたリチウムフェライトによる高温CO2ガス吸収

Hideaki Inazawa,Yuta Ozaki,Koichi Terasaka, Daisuke Kobayashi, Yugo Kanai

化学工学シンポジウムシリーズ81    1-6 2010.01

Research paper (conference, symposium, etc.), Joint Work, Accepted

超音波によるマイクロバブル群の凝集・再分散を利用した浮上分離プロセス

TERASAKA KOICHI

月刊マテリアルインテグレーション (ティー・アイ・シー)  22 ( 6 ) 2-11 2009.05

Research paper (scientific journal), Single Work

混合蒸気の直接接触凝縮を用いたマイクロバブル生成

TERASAKA KOICHI,Saito Jumpei, Toda Yu, Kobayashi Daisuke

混相流研究の進展 (日本混相流学会)  4   87-93 2009.03

Research paper (scientific journal), Joint Work, Accepted

混合蒸気の直接接触凝縮を用いたマイクロバブル生成

TERASAKA KOICHI,Saito Jyumpei, Toda Yu, Kobayashi Daisuke

混相流研究の進展 4   87-93 2009.03

Research paper (scientific journal), Joint Work, Accepted

マイクロバブル浮上分離による酸化鉄微粒子の除去

TERASAKA KOICHI, Aoki Shun, Kobayasi Daisuke

混相流研究の進展 (日本混相流学会)  3   43-50 2008.06

Research paper (scientific journal), Single Work, Accepted

Slug Bubble Formation in Co-flowing Liquid in Capillary Tube

Takashi GOSHIMA and Koichi TERASAKA

Journal of Chemical Engineering of Japan (Sciety of Chemical Engineers, Japan)  40 ( 11 ) 913-919 2007.11

Research paper (scientific journal), Joint Work, Accepted

　View Summary

マイクロリアクター内の気液２相の流動様式は入口ノズルでの気泡生成に依存する。ここでは非球形気泡生成モデルを改良し、マイクロサイズの気泡の生成挙動をシミュレーションした。

Simultaneous Measurements of Gas-Solid Flow Rates and Pressure　Drop in Downcomer of J-Valve in CFB

GOSHIMA　TAKASHI　and TERASAKA KOICHI

Chemical Engineering and Biochemical Engineering Quarterly Journal (Croatian Society of Chemical Engineers)  21 ( 4 ) 357-363 2007.11

Research paper (scientific journal), Joint Work, Accepted

　View Summary

循環流動層内のJバルブ内の固気流動を、酸素ガストレーサーと熱粒子トレーサーおよび圧力差の同時測定により明らかにした。

Simultaneous Measurements of Gas-Solid Flow Rates and Pressure Drop in Downcomer of J-Valve in CFB

Takashi Goshima; Koichi Terasaka

Chemical and Biochemical Engineering Quarterly 21 ( 4 ) 357 - 363 2007.10

Joint Work

Tribological Action and Cutting Performance of MQL Media in Machining of Aluminum

T. Wakabayashi, S. Suda, I. Inasaki, K. Terasaka, Y. Musha and Y. Toda

Annals of the CIRP (CIRP)  56 ( 1 ) 97-100 2007.05

Research paper (scientific journal), Joint Work, Accepted

　View Summary

機械加工切削において、潤滑油は非常に重要であるが、アルミの切削においては潤滑油中にマイクロウオータードロップをいれると切削抵抗の低減が見られた。

Separation of Fine Particles Suspended in Water Using Microbubble Flotation

TERASAKA KOICHI, SINPO YASUYUKI

混相流 (日本混相流学会)  21 ( 1 ) 77-83 2007.03

Research paper (scientific journal), Single Work, Accepted

マイクロバブル発生法と工業装置への適用

TERASAKA KOICHI

化学工学 (化学工学会)  71 ( 3 ) 170-173 2007.03

Research paper (scientific journal), Single Work

Tribological Action and Cutting Performance of MQL Media in Machining of Aluminum

T. Wakabayashi1, S. Suda, I. Inasaki, K. Terasaka, Y. Musha, Y. Toda3

CIRP Annals - Manufacturing Technology 56 ( 1 ) 97 - 100 2007

Joint Work

Slug bubble formation in a co-flowing liquid in a capillary tube

Takashi Goshima; Terasaka Koichi

Journal of Chemical Engineering of Japan 40 ( 11 ) 913 - 919 2007

Joint Work

Absorption and Stripping of CO2 with a Molten Salt Slurry in a Bubble Column at High Temperature

Koichi Terasaka; Yukiko Suyama; Kazuaki Nakagawa; Masahiro Kato; Kenji Essaki

Chemical Engineering & Technology 29 ( 9 ) 1118 - 1121 2006.09

Joint Work

7ｔh German/Japanese Symposium on Bubble Columns(第7回独日気泡塔シンポジウム）に参加して

TERASAKA KOICHI

化学工学 (化学工学会)  70 ( 9 )  2006.08

Research paper (scientific journal), Single Work

Fabrication of High Performance Polymeric Microfluidic Device by a Simple Imprinting Method Using a Photosensitive Sheet

Takeshi, Ito, Taku Kawaguchi, Hiroko Miyoshi, Kenichi Maruyama, Aki Honda, Satoru Kaneko, Seishiro Ohya, Osamu Niwa, TERASAKA KOICHI and Koji Suzuki

Japanese Journal of Applied Physics 45 ( 2 ) L64-L67 2006.01

Research paper (scientific journal), Joint Work, Accepted

Absorption and Stripping of CO2 with Molten Salt Slurry in Bubble Column at High Temperature

K. Terasaka , Y. Suyama , K. Nakagawa , M. Kato and K. Essaki

Chemical Engineering and Technology 29 ( 9 ) 1118-1121 2006

Research paper (scientific journal), Joint Work

CO2 Absorption Properties of Lithium Ferrite for Application as a High-Temperature CO2 Absorbent

Masahiro KATO, Kenji ESSAKI, Kazuaki NAKAGAWA, Yukiko SUYAMA and TERASAKA KOICHI

Journal of the Ceramic Society of Japan 113 ( 1322 ) 684-686 2005.10

Research paper (scientific journal), Joint Work, Accepted

An advanced oscillation mixing method for improving the cooling uniformity in quenching

Hiroyuki HOSHINO, Hiromitsu MURAKAMI, Hideo YOKOTA, Satoshi SUDA, Hideki TSUGE, Koichi TERASAKA and Toshiaki WAKABAYASHI

Transactions of Materials and Heat Treatment 25 ( 5 ) 475-479 2004.10

Research paper (scientific journal), Single Work, Accepted

Simultaneous measurement of 3-dimensional shape and behavior of single bubble in liquid using laser sensors

Koichi TERASAKA, Mizue KAKIZAKI, Yousuke INOUE and Mizuho NIWA

Journal of Chemical Engineering of Japan (Society of Chemical Engineers, Japan)  37 ( xx ) 921-926 2004.10

Research paper (scientific journal), Joint Work, Accepted

Liquid circulation and mass transfer in external-loop airlift reactor with partitioning plates

Hideki Tsuge, Satoru Otatsume, Ken Kobayashi, Koichi Terasaka, Manabu Hayasaki and Hirotsugu Kobayashi

Journal of Chemical Engineering of Japan (Society of Chemical Engineers, Japan)  37 ( 8 ) 941-946 2004.10

Research paper (scientific journal), Joint Work, Accepted

Liquid circulation and mass transfer in an external-loop airlift reactor with partitioning plates

Hideki Tsuge, Satoru Otatsume, Ken Kobayasi, Koichi Terasaka, Hirotsugu Kobayashi

Journal of Chemical Engineering of Japan 37 ( 8 ) 941 - 946 2004

Joint Work

Special issue for new frontier in bubble-column research-Evolving from the 6th Japanese/German Symposium on Bubble Columns-Preface

Mikio Kawagoe, Katsumi Tsuchiya, Koichi Terasaka, Yutaka Tada

Journal of Chemical Engineering of Japan 37 ( 8 )  2004

Joint Work

Bubble Distribution in Shear Flow of Highly Viscous Liquids

KOICHI TERASAKA, Sayako Murata and Kaori Tsutsumino

Canadian Journal of Chemical Engineering 81   470-475 2003.08

Research paper (scientific journal), Joint Work, Accepted

Oxygen Transfer in Viscous Non-Newtonian Liquids Having Yield Stress in Bubble Columns Operated under Slug Flow Condition

TERASAKA KOICHI and Hiroki SHIBATA

Chemical Engineering Science 58 ( xx ) 5331-5337 2003

Research paper (scientific journal), Joint Work, Accepted

Gas holdup for slug bubble flow of iscous liquids having a yield stress in bubble columns

KOICHI TERASAKA and Hideki TSUGE

Chemical Engineering Science 58   513-517 2003

Research paper (scientific journal), Single Work, Accepted

Mass Transfer in high-pressure bubble columns with organic liquids

Uwe Jordan, KOICHI TERASAKA,Gautam Kundu, Adrian Schumpe

Chemical Engineering & Technology 25 ( 3 ) 262-265 2002

Research paper (scientific journal), Joint Work, Accepted

　View Summary

高圧気泡塔を用いた有機溶媒への物質移動の測定

Development of a J-shaped pneumatic valve to control the solid particle circulation rate in a circulating fluidized bed

KOICHI TERASAKA,Shinji Akashi, Hideki Tsuge

Powder Technology 126 ( 1 ) 13-21 2002

Research paper (scientific journal), Single Work, Accepted

Ammonia absorption from a bubble expanding at a submerged orifice into water

KOICHI TERASAKA, Junko OKA and Hideki TSUGE

Chemical Engineering Science 57   3757-3765 2002

Research paper (scientific journal), Single Work, Accepted

ドラフトチューブ付気泡塔内で強制循環される高粘度液中への物質移動

KOICHI TERASAKA,Hideki Tsuge

化学工学論文集 27 ( 4 ) 443-448 2001

Research paper (scientific journal), Joint Work, Accepted

　View Summary

２重管式気泡塔に軸流動力を追加して性能を向上させた

Bubble Formation from a Nozzle Submerged in Viscous Liquids Having Yield Stress

KOICHI TERASAKA,Hideki Tsuge

Chemical Engineering Science 56   3237-3245 2001

Research paper (scientific journal), Joint Work, Accepted

　View Summary

降伏応力をもつ非ニュートン流体中での気泡生成をモデル化

Stoffubergang in Druckblasensaulen mit organischen Flussigkeiten

Uwe Jordan, KOICHI TERASAKA,Gautam Kundu, Adrian Schumpe

Chemie- Ingenieur-Technik 73 ( 8 ) 982-985 2001

Research paper (scientific journal), Joint Work, Accepted

　View Summary

高圧気泡塔を用いた有機溶媒への物質移動の測定

Effect of Operating Conditions on Two-phase Bubble Formation Behavior at Single Nozzle Submerged in Water

Tirto Prakoso,KOICHI TERASAKA,Hideki Tsuge

Journal of Chemical Engineering of Japan 34 ( 2 ) 114-120 2001

Research paper (scientific journal), Joint Work, Accepted

第５回日独気泡塔シンポジウムに参加して

TERASAKA KOICHI

化学工学 64 ( 11 ) 50 2000

Research paper (scientific journal), Single Work

Two-Phase Bubble Formation with Condensation at Nozzle Submerged in Immiscible Liquid

寺坂宏一・ティルトプラコソ・孫万泳・柘植秀樹

Journal of Chemical Engineering of Japan 33 ( 1 ) 113-119 2000

Research paper (scientific journal), Joint Work, Accepted

　View Summary

液中に蒸気を吹き込み、冷却により２相気泡が生成する際のメカニズムを示した。

Centrifugal Gas-Liquid Separation under Low Gravity Conditions

Hyonsoo Ahn, Tanaka Kosuke, Tsuge Hideki,TERASAKA KOICHI,Tsukada Kumiko

Separation and Purification Technology 19   121-129 2000

Research paper (scientific journal), Joint Work, Accepted

沿岸海域の漁業資源を予測する

TERASAKA KOICHI

化学工学 63 ( 1 ) 52－53 1999

Research paper (scientific journal), Single Work

Measurement of Heat Transfer Coefficient for Direct-Contact Condensation during Bubble Growth in Liquid

TERASAKA KOICHI,Wan-Yong SUN, Tirto PRAKOSO, Hideki Tsuge

Journal of Chemical Engineering of Japan 32 ( 5 ) 594-599 1999

Research paper (scientific journal), Joint Work, Accepted

　View Summary

液相と気相が直接接触して凝縮が生じる場合の熱伝達係数の測定法と実測値を示した。

SO2 Bubble Formation at an Orifice Submerged in Water

KOICHI TERASAKA,Yukiko HIEDA, Hideki Tsuge

Journal of Chemical Engineering of Japan 32 ( 4 ) 72-479 1999

Research paper (scientific journal), Joint Work, Accepted

　View Summary

水中にSO2気泡を生成させた場合の反応を伴う気泡生成の状態を実験的に調べモデル化した。

Bubble Formation in Cocurrently Upward flowing Liquid

TERASAKA KOICHI, Matue Hirokazu, Tsuge Hideki

Canadian Journal of Chemical Engineering 77 ( 3 ) 458-464 1999

Research paper (scientific journal), Joint Work, Accepted

　View Summary

ノズルのガス吹き込み方向について液を並流上向きに流した際の気泡の挙動を実験的に解析し、モデル化を行った。

海洋への鉄分施肥による植物プランクトンの増殖

KOICHI TERASAKA

化学工学 62 ( 1 ) 53 1998.01

Research paper (scientific journal), Single Work

Behavior of bubble formation at elevated pressure

Dong-Hyun YOO, Koichi TERASAKAand Hideki TSUGE

Journal of Chemical Engineering of Japan 31 ( 1 ) 76-82 1998

Research paper (scientific journal), Joint Work, Accepted

Mass Transfer in Bubble Columns Studied with an Oxygen Optode

Koichi TERASAKA, Dirk HULLMANN and Adrian SCHUMPE

Chemical Engineering Scienc 53 ( 1 ) 3181-3184 1998

Research paper (scientific journal), Single Work, Accepted

Bubble Formation in Quiescent Liquids under Low Gravity Conditions

Hideki TSUGE, Kosuke TANAKA and Koichi TERASAKA

Journal of Japan Society of Microgravity Application 15 ( II ) 214-219 1998

Research paper (scientific journal), Single Work, Accepted

Bubble formation in flowing liquid under reduced gravity

Hideki TSUGE, Yuko TANAKA, Koichi TERASAKA and Hirokazu MATSUE

Chemical Engieering Science 52 ( 21/22 ) 3671-3676 1997.12

Research paper (scientific journal), Joint Work, Accepted

Behavior of bubble formation in suspended solution for an elevated pressure system

Dong-Hyun YOO, Hideki TSUGE, Koichi TERASAKA and Kensaku MIZUTANI

Chemical Engineering Science 52 ( 21/22 ) 3701-3707 1997.12

Research paper (scientific journal), Joint Work, Accepted

Bubble formation at orifice in viscoelastic liquids

Koichi TERASAKA, Hideki TSUGE

AIChE Journal 43 ( 11 ) 2903-2910 1997.11

Research paper (scientific journal), Joint Work, Accepted

Bubble formation at submerged nozzles for small gas flow rate under low gravity

Hideki TSUGE, Koichi TERASAKA, Wataru KOSHIDA and Hirokazu MATSUE

Chemical Engineering Science 52 ( 20 ) 3415-3420 1997.10

Research paper (scientific journal), Joint Work, Accepted

塔型フォトバイオリアクター開発に関する研究

KOICHI TERASAKA

RITE NOW Vol.21 1996.11

Research paper (bulletin of university, research institution), Single Work

国内研究者海外派遣事業研究成果報告書

寺坂宏一

平成7年度調査報告書・地球環境産業技術開発推進事業国際研究交流事業  1996.03

Research paper (bulletin of university, research institution), Single Work

高圧気泡塔での気泡生成シミュレーション

Tsuge Hideki, Donghyun Yoo, KOICHI TERASAKA

ケミカルエンジニアリング 40 ( 12 )  1995.11

Research paper (scientific journal), Joint Work

炭酸マグネシウム及び炭酸カルシウム結晶の最適結晶析出のための反応晶析法

柘植秀樹，寺坂宏一

海水中のCaおよびMgイオンを利用した大量CO泡の処理に関する化学工学面の調査  1995.03

Research paper (other academic), Joint Work

Mass transfer in Multistage Slurry bubble column:Analysis by back flow model

hideki Tsuge,Yamada，T.,KOICHI TERASAKA, Miyakawa，S.

Chemical Engineering Research and Design， 73 ( A6 ) 669-675 1995

Research paper (scientific journal), Joint Work, Accepted

炭酸カルシウムの大粒径結晶を析出させる反応晶析方法

柘植秀樹，寺坂宏一

大量CO2の海水中のCaイオンによる処理に関する化学工学面の調査  1994.03

Research paper (other academic), Joint Work

MF，UF膜のファウリングのメカニズムと対策に関する調査及び実験

柘植秀樹，寺坂宏一，青葉一樹，永井聡，続学，晝間充久

生物分離工学特別研究会研究実施ワーキンググループ成果報告書  1994

Research paper (other academic), Joint Work

海洋汚染はじめ水域汚染の防止技術に関する化学工学面からの調査

地球環境保全のための化学工学的対策技術に関する調査  1993.03

Research paper (other academic), Single Work

最新の高効率・環境汚染防止型の浚渫技術

KOICHI TERASAKA

化学工学 58 ( 3 ) 70 1993

Research paper (scientific journal), Single Work

Bubble formation under constant-flow conditions

Koichi Terasaka, and Hideki Tsuge

Chemical Engineering Science 48   3417-3422 1993

Research paper (scientific journal), Joint Work, Accepted

BEHAVIOR OF BUBBLES FORMED FROM A SUBMERGED ORIFICE UNDER HIGH SYSTEM PRESSURE

Tsuge Hideki, Nakajima Yoshito,Koichi Terasaka,

Chemical Engineering Science 47   3273-3280 1992.08

Research paper (scientific journal), Joint Work, Accepted

Bubble Formation at an Orifice in Liquid under Highly Pressurized Conditions

TERASAKA KOICHI, Tsuge Hideki

International Journal of Engineering Fluid Mechanics 5 ( 4 ) 439-457 1992

Research paper (scientific journal), Joint Work, Accepted

MASS TRANSFER IN HIGHLY VISCOUS LIQUIDS IN BUBBLE COLUMN WITH CONSTANT FLOW NOZZLES

TERASAKA KOICHI, Tsuge Hideki

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 24 ( 4 ) 424-429 1991

Research paper (scientific journal), Joint Work, Accepted

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ガス分散板としてコンスタントフローノズルを用いることにより高粘度液に適用可能な気泡塔を開発し，その他大きな物質移動が比較的小さなガス空塔速度で得られることを示した。

BUBBLE FORMATION AT A SINGLE ORIFICE IN NON-NEWTONIAN LIQUIDS

TERASAKA KOICHI,Tsuge Hideki

CHEMICAL ENGINEERING SCIENCE 46 ( 1 ) 85-93 1991

Research paper (scientific journal), Joint Work, Accepted

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非球形気泡生成モデルを非ニュートン流体にも適用できるように拡張し，気泡発生メカニズムを明らかにすることにより気泡容積や形状を良く推定できた。

BUBBLE FORMATION AT A SINGLE ORIFICE IN HIGHLY VISCOUS LIQUIDS

Koichi Terasaka,Tsuge Hideki

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 23 ( 2 ) 160-165 1990

Research paper (scientific journal), Joint Work, Accepted

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非球形気泡生成モデルを開発し，高粘度液中で生成する気泡の容積，形状及び蓄気室内圧力変化などを十分良く推定できた。

VOLUME OF BUBBLES FORMED FROM AN ORIFICE SUBMERGED IN HIGHLY VISCOUS NEWTONIAN AND NON-NEWTONIAN LIQUIDS

Hideki Tsuge, Koichi Terasaka

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 22 ( 4 ) 418-421 1989

Research paper (scientific journal), Joint Work, Accepted

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高粘度ニュートン流体を含めた非ニュートン流体中で生成する気泡容積に及ぼす諸因子の影響を実験的に調べ，広い範囲で適用可能な無次元相関式を提出した。

高粘度液中での単一孔よりの気泡生成

柘植 秀樹, 寺坂 宏一, 戸沢 一宏, 日比野 眞一

化学工学論文集 13 ( 6 ) 857-860 1987.05

Research paper (scientific journal), Joint Work, Accepted

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高粘度液中におかれた単一孔より生成する気泡の容積に及ぼす諸因子の影響を調べ，無次元相関式を導いた。