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Yoshio Iwai Last modified date：2020.06.02

Associate Professor / Molecular and Biochemical Systems Engineering
Department of Chemical Engineering
Faculty of Engineering


Graduate School
Department of Chemical Systems and Engineering
Graduate School of Engineering
Undergraduate School
Department of Materials Science and Engineering
School of Engineering


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Homepage
https://kyushu-u.pure.elsevier.com/en/persons/yoshio-iwai
　Reseacher Profiling Tool　Kyushu University Pure
http://www.chem-eng.kyushu-u.ac.jp/lab1/index_English.html
Research subjects etc. are explained .
Phone
092-802-2751
Fax
092-802-2751
Academic Degree
Doctor of Engineering
Country of degree conferring institution (Overseas)
Yes
Field of Specialization
Chemical Engineering
Total Priod of education and research career in the foreign country
01years00months
Outline Activities
I lecture and research properties and chemical physics in chemical engineering. Main subjects are properties in chemical engineering, industrial chemical physics, phase equilibrium, supercritical fluid technology, and separation technology.

My lectures
for master course students : phase equilibria (English lecture)
for undergraduate students :
chemical physics for process design

I issued text book “Chemical physics for engineering, ed. by Y. Arai and Y.Iwai, Asakurasyoten(1991).”
Research
Research Interests
  • Test of thermodynamic models by molecular simulation and propose of new models
    keyword : Activity coefficient, Molecular simulation, Athermal term, Interaction term
    2009.04.
  • Production of functional materials by using supercritical carbon dioxide
    keyword : supercritical carbon dioxide,cotton, solar cell, metal polymer complex
    2009.04.
  • Phase equilibria for water + hydrocarbon + alcohol systems at high temperature and pressure
    keyword : phase equilibrium, high temperature pressure, supercritical water, subcritical water, hydrocarbon, supercritical　alcohol
    2005.04As fundamental data to develop new chemical processes using sub- or supercritical water, phase equilibria of water + hydrocarbon + alcohol systems have been measured at high pressures and high temperature. Further, their phase behaviors are discussed and a successful prediction method is proposed..
  • Estimation of activity coefficients for isomers
    keyword : activity coefficient, isomer
    2005.04Liquid phase activity coefficients are very important to express the non-ideality of solutions. A group-contribution method is considered to be a successful approach for various mixtures. However, it is very difficult to distinguish the isomers by the original ASOG. The entropy term has been revised and the contact probability between groups is introduced to propose a modified ASOG. Good results are shown for mixtures containing alkanes, alcohols and ethers..
  • Analysis of micro structures of fluids by molecular simulation
    keyword : molecular simulation, micro structure, fluid, molecular dynamics simulation,　Monte Carlo simulation
    2005.04To elucidate the microstructures of high-pressure gaseous mixtures and solutions is important and helpful to develop a successful prediction method for mixture properties. By using the Monte Carlo method and the molecular dynamics, solubilities and diffusion coefficients of solutes in supercritical carbon dioxide are simulated. Further, the microstructures of mixtures are also analyzed by the radial distribution function..
  • Effect of electrohydrodynamics on extraction and cleaning in supercritical fluid
    keyword : electrohydrodynamics, supercritical fluid, mass transfer
    2005.04～2012.12Crystallization is one of the most effective methods to obtaine ultra pure organic compounds. However, the purity decreases when impurities are included in the solid phase through the liquid-solid interface during the solidification processes. It is acknowledged that the turbulent flow is caused when the electric field applied to organic liquids. By using this effect, impurities may be removed from the liquid-solid interface. Aromatic compounds are interested. For example, the effect of electric field can be observed in crystallization of 3,5-xylenol (2,5-xylenol as an impurity)..
  • Solubilities of salts in water at high temperature and pressure
    keyword : subcritical water, supercritical water, salt
    2005.04～2010.12In oxidation processes of PCB and dioxine using sub- or supercritical water, hydrogen chloride is produced and is neutralized by adding alkali. Solubility data of inorganic salts are important knowledge because inorganic salts such as NaCl produced cause blockage of equipments. Solubilities of NaCl, KCl, and LiCl in water at high temperature and high pressures are measured and a successful prediction method is developed..
  • Vapor-liquid equilibria of supercritical carbon dioxide + citrus oil compounds systems and entrainer effects
    keyword : supercritical carbon dioxide, citrus oil, entrainer effect
    2005.04～2010.12An fundamental knowledges to separate limonene and linalool contained in citrus oil by using supercritical carbon dioxide, high pressure vapor-liquid equilibria of carbon dioxide + limonene+ linalool ternary system have been measured. To discuss the effect of ethanol added as an entrainer to enhance the separation efficiency, carbon dioxide + limonene + linalool + ethanol quaternary system are measured and a useful prediction method is developed using an equation of state..
  • Solubilities of fluorinated compounds in supercritical carbon dioxide
    keyword : supercritical carbon dioxide, fluorinated compound, solubility
    2005.04～2010.12A large solubility of a fluorinated compound is acknowledged. To consider the solubility enhancement by fluorination and the relation between the solubility and the position of fuluorinated group in the compound, the solubilities of 2-trifluoro, 3-trifluoro, and 4-trifluoromethylbenzoic acids in supercritical carbon dioxide have been measured referring to benzoic acid. The solubility data obtained are correlated by using an equation of state or a solution model..
Current and Past Project
  • Investigation for altitude use of water for the purpose of earth environment matching new technique development
Academic Activities
Books
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1. Handbook of Chemical Engineering, 7th Edition, Edited by the Society of Chemical Engineers, Japan, 1.4 Vapor Pressure and Heat of Vaporization.
2. Introduction of Supercritical Fluids, 2.2 Phase Equilibria.
3. Phase Equilibria of Supercritical Fluid Systems
.
4. Application to Phase Equilibria
.
5. The fifth series of experimental chemistey.
6. Nano Technology with Supercritical Fluids.
7. Progress of Chemical Engineering 37.
8. Handbook of Applications of Supercritical Fluids for Foods.
9. Fundamentals and Applications of Supercritical Fluids.
10. Y. Arai, T. Sako, and Y. Iwai, other 39 members, Supercritical Fluids, Springer, 1.4.2 Solubility, pp.42-46,, 2002.10.
11. Handbook of Chemical Engineering, 6th edition.
Reports
 Show All Reports >>
Papers
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1. Tao FANG, Yusuke SHIMOYAMA, Toshio ABETA, Yoshio IWAI, Mitsuru SASAKI and Motonobu GOTO, Phase Equilibria for the Mixtures of Supercritical Methanol + C18 Methyl Esters and Supercritical Methanol + α-Tocopherol , Journal of Supercritical Fluids, Vol. 47, Issue 2, pp. 140-146, 2008.12.
2. Yusuke SHIMOYAMA, Takeshi HIRAYAMA and Yoshio IWAI, Measurement of Infinite Dilution Activity Coefficients of Alcohols, Ketones, and Aromatic Hydrocarbons in 4-Methyl-n-butylpyridinium Tetrafluoroborate and 1-Butyl-3-methylimidazolium Hexafluorophosphate by Gas-Liquid Chromatography , Journal of Chemical & Engineering Data, Vol. 53,?Issue 9, pp. 2106-2111, 2008.09.
3. Yusuke Shimoyama, Toshio Abeta, Yoshio Iwai, Prediction of vapor ? liquid equilibria for supercritical alcohol + fatty acid　ester systems by SRK equation of state with Wong-Sandler mixing rule based on　COSMO theory, Journal of Supercritical Fluids, Vol.46, No.1, pp.4-9, 2008.08.
4. Yusuke Shimoyama, Yoshio Iwai , Satoshi Yoda, Takeshi Furuya, Prediction of Partition Coefficients of Benzothiophene and　Benzothiophene 1,1-Dioxide in Octane / Acetonitrile System Using COSMO Theory, Industrial & Engineering Chemistry Research, Vol.47, No.9, pp.3247-3252, 2008.05.
5. Yusuke Shimoyama, Masanori Sonoda, Kaoru Miyazaki, Hidenori Higashi, Yoshio Iwai and Yasuhiko Arai, Measurement of Solubilities for Rhodium Complexes and Phosphine Ligands in Supercritical Carbon dioxide, Journal of Supercritical Fluids, Vol.44, No3, pp.266-272, 2008.04.
6. Yusuke Shimoyama, Yoshio Iwai, Toshio Abeta, Yasuhiko Arai, Measurement and Correlation of Vapor-Liquid Equilibria for Ethanol + Ethyl Laurate and Ethanol + Ethyl Myristate Systems near Critical Temperature of Ethanol, Fluid Phase Equilibria, Vol.264, No.1-2, pp.228-234, 2008.03.
7. Yusuke Shimoyama, Yoshio Iwai, Bo Seok Jin, Takeshi Hirayama and Yasuhiko Arai, Measurement and Correlation of Vapor-Liquid Equilibria for Methanol + Methyl Laurate and　Methanol + Methyl Myristate Systems near Critical Temperature of Methanol, Fluid Phase Equilibria, Vol. 257, No. 2, pp. 217-222 , 2007.08.
8. Tao Fang, Wahyudiono, Bushra Al-Duri, Yusuke Shimoyama, Yoshio Iwai, Mitsuru Sasaki and Motonobu Goto, Supercritical Methanol Process of Modifying Oil Byproduct for Concentrating Natural Tocopherols, Industrial & Engineering Chemistry Research, Vol. 46, pp. 5325-5332, 2007.08.
9. Yusuke Shimoyama, Yoshio Iwai, Natsuki Okamoto and Yasuhiko Arai, Supercritical Carbon Dioxide Drying of Lipase-Immobilized Silica Gels, ITE Letters on Batteries, New Technologies & Medicine, Vol. 8, No. 2, pp. 162-167, 2007.04.
10. Yoshio Iwai, Natsuki Okamoto, Shinpei Ohta, Yasuhiko Arai　and Kinya Sakanishi, Extraction of Iron and Calcium from Low Rank Coal by Supercritical Carbon Dioxide with Entrainers, The Journal of Supercritical Fluids, Vol. 40, Issue 2, pp. 227-231, 2007.03.
11. Go Inoue, Yoshio Iwai, Munehiro Yasutake, Katsumi Honda and Yasuhiko Arai, Measurement of infinite dilution activity coefficients of n-alkanes in 4-methyl-n-butylpyridinium tetrafluoroborate using gas-liquid chromatography, Fluid Phase Equilibria, Vol. 251, Issue 1, pp.17-23, 2007.01.
12. Go Inoue, Yusuke Shimoyama, Feifei Su, Satoshi Takada, Yoshio Iwai and Yasuhiko Arai, Measurement and Correlation of Partition Coefficients for Phenolic Compounds in the 1-Butyl-3-methylimidazolium Hexafluorophosphate / Water Two Phase System, J. Chem.Eng. Data, Vol. 52, Issue 1, pp. 98-101, 2007.01.
13. Gil Sun LEE, Yoshio IWAI, Shinsuke ABE, Yusuke SHIMOYAMA and Yasuhiko ARAI, Effect of Ion Exchange Rate of Y-type Zeolite on Selective Adsorption of 2,6- and 2,7-Dimethylnaphthalene Isomers in Supercritical Carbon Dioxide

, Science and Technology of Advanced Materials, Vol.7, No. 7, pp.672-677, 2006.10.
14. Yoshio IWAI, Hirotaka NAGANO, Gil Sun LEE, Machiko UNO and Yasuhiko ARAI, Measurement of Entrainer Effects of Water and Ethanol on Solubility of Caffeine in Supercritical Carbon Dioxide by FT-IR Spectroscopy


, J. of Supercritical Fluid, Vol.38, No.3, pp.312-318, 2006.10.
15. Hidenori HIGASHI, Yoshio IWAI, Yoshiaki KITANI, Kota MATSUMOTO, Yusuke SHIMOYAMA and Yasuhiko ARAI, Application of Association Model for Solubilities of Alkali Metal Chloride in Water Vapor at High Temperatures and Pressures


, J. Chem. Eng. Japan, Vol.39, No.10, pp.1029-1034, 2006.10.
16. Tohru SAITO, Yoshio IWAI, Yasuhiko ARAI, Futoshi NAKADAI, Daisuke TANIGUCHI, Kenji OCHI and Takeshi FURUYA, Effect of Pressurized Carbon Dioxide on Mutual Miscibility Temperatures for Methanol + Hydrocarbon Binary Liquid Mixtures

, J. Chem. Eng. Japan, Vol.39, No.9, pp.907-914, 2006.09.
17. Yusuke SHIMOYAMA, Yoshio IWAI, Satoshi TAKADA, Yasuhiko ARAI, Tomoya TSUJI and Toshihiko HIAKI , Corrigendum to “Prediction of Phase Equilibria for Mixtures Containing Water, Hydrocarbons, and Alcohols at High Temperatures and Pressures by Cubic Equation of State with GE Type Mixing Rule Based on COSMO-RS”, Fluid Phase Equilibria, 243 (2006) 183–192 ERRATUM
, Fluid Phase Equilibia , Vol. 247, No. 1-2, pp.205-207, 2006.09.
18. Yusuke SHIMOYAMA, Yoshio IWAI, Masashi HARUKI and Yasuhiko ARAI, Correlation of Phase Equilibria for Hydrogen + Alkane Systems Using Cubic Equation of State
, ITE Letters on Batteries, New Technologies & Medicine, Vol.7, No.4, pp.346-351, 2006.08.
19. Yusuke SHIMOYAMA, Yoshio IWAI, Satoshi TAKADA, Yasuhiko ARAI, Tomoya TSUJI and Toshihiko HIAKI, Prediction of Phase Equilibria for Mixtures Containing Water, Hydrocarbons, and Alcohols at High Temperatures and Pressures by Cubic Equation of State with GE Type Mixing Rule Based on COSMO-RS
, Fluid Phase Equilibria, Vol.243, Nos.1-2, pp.183-192, 2006.05.
20. Prediction of Phase Equilibria for Water + Light Hydrocarbon Systems at High Temperatures and Pressures by Cubic Equation of State with Information from Molecular Simulation.
21. Yusuke SHIMOYAMA, Yoshio IWAI, Kentaro YAMADA, Makoto YAMAKITA and Yasuhiko ARAI, Measurement and Correlation of Vapor-Liquid Equilibria for Water + 2-Propanol, Water + 2-Butanol and Water + 2-Pentanol Systems at High Temperatures and Pressures , Journal of Chemical and Engineering Data, Vol.51, pp.51-55, 2006.01.
22. Yoshio IWAI, Makoto ICHIMOTO, Satoshi TAKADA, Shinichi OKUDA and Yasuhiko ARAI, Entrainer Effect of Ethanol on High-Pressure Vapor-Liquid Equilibria for Supercritical Carbon Dioxide + Limonene + Linalool System, Journal of Chemical and Engineering Data, 10.1021/je050079t, 50, 6, 1844-1847, Vol. 50, No. 6, pp. 1844-1847, 2005.12.
23. Hidenori HIGASHI, Yoshio IWAI, Tuyoshi ODA, Kengo MURAI and Yasuhiko ARAI, Diffusion Coefficients of Cetyl Alcohol in Supercritical Carbon Dioxide, J. Chem. Eng. Japan, 10.1252/jcej.38.865, 38, 11, 865-869, Vol. 38, No. 11, pp. 865-869, 2005.11.
24. Hidenori HIGASHI, Yoshio IWAI, Kaoru MIYAZAKI and Yasuhiko ARAI, Molecular Dynamics Simulation of Fluorination Effect for Solvation of Trifluoromethylbenzoic Acid Isomers in Supercritical Carbon Dioxide, Molecular Simulation, 10.1080/08927020500183299, 31, 10, 725-730, Vol.31, No.10, pp. 725-730, 2005.08.
25. Hidenori HIGASHI, Yoshio IWAI and Yasuhiko ARAI, Comparison of Molecular Models Used in Molecular Dynamics Simulation for Tracer Diffusion Coefficients of Naphthalene and Dimethylnaphthalene Isomers in Supercritical Carbon Dioxide , Fluid Phase Equilibria, 10.1016/j.fluid.2005.05.013, 234, 1-2, 51-55, Vol. 234, Issues 1-2, pp. 51-55, 2005.07.
26. Hidenori HIGASHI, Yoshio IWAI, Kota MATSUMOTO, Yoshiaki KITANI, Fumio OKAZAKI, Yusuke SHIMOYAMA and Yasuhiko ARAI, Measurement and Correlation for Solubilities of Alkali Metal Chlorides in Water Vapor at High Temperature and Pressure , Fluid Phase Equilibria, 10.1016/j.fluid.2004.07.019, 228, 547-551, Vol. 228-229, pp. 547-551, 2005.02.
27. Hidenori HIGASHI, Yoshio IWAI, Kaoru MIYAZAKI, Yoshiyuki OGINO, Miyuki OKI and Yasuhiko ARAI, Measurement and Correlation of Solubilities for Trifluoromethylbenzoic Acid Isomers in Supercritical Carbon Dioxide , The Journal of Supercritical Fluids, 10.1016/j.supflu.2004.03.006, 33, 1, 15-20, Vol.33, pp. 15-20, 2005.01.
28. Yusuke Shimoyama, Yoshio Iwai, Makoto Yamakita, Ichiro Shinkai, Yasuhiko Arai, Measurement and Correlation of Phase Equilibria for Water + Decane + 2-Propanol,Water + Hexane + 2-Propanol, and Water + Decane + 2-Butanol Ternary Systems
at 573 and 593 K and 15.0 and 20.0 MPa, Journal of Chemical and Engineering Data, 10.1021/je030213e, 49, 2, 301-305, 49(2),301-305 (2004), 2004.05.
29. Takahiro SUZUKI, Kohei YOSHIDA, Hiroya ONIZUKA, Yoshio IWAI, Yasuhiko ARAI, Aynur APTULA, Ralph K?hne, Ralf-Uwe Ebert and Gerrit Sch??rmann, Categorical Modeling of the Flow Pattern of Liquid Organic Compounds Between Blade Electrodes Using Semiempirical and ab initio Quantum Chemical Descriptors, CROATICA CHEMICA ACTA, CCACAA, 77, 1-2, 377-389, Vol. 77, No. 1?2, pp. 377-389, 2004.05.
30. Hidenori HIGASHI, Tsuyoshi ODA, Yoshio IWAI and Yasuhiko ARAI, Calculation of Diffusion Coefficients for Carbon Dioxide + Solute System near the Critical Conditions by Non-Equilibrium Molecular Dynamics Simulation, Fluid Phase Equilibria, 10.1016/j.fluid.2004.01.014, 219, 1, 55-60, Vol. 219, pp. 55-60, 2004.05.
31. Yoshio Iwai, Machiko Uno, Hirotaka Nagano, Yasuhiko Arai, Measurement of Solubilities of Palmitic Acid in Supercritical Carbon Dioxide and Entrainer Effect of Water by FTIR Spectroscopy, J. Supercritical Fluids, 10.1016/S0896-8446(03)00013-5, 28, 2-3, 193-200, Vol.28, pp.193-200, 2004.03.
32. Yoshio Iwai, Hiroya Onizuka, Kohei Yoshida, Yasuhiko Arai, Effect of a Direct-Current Electric Field on the Separation of Binary Systems Containing Organic Compounds Using Crystallization, Ind. Eng. Chem. Res., 10.1021/ie030181o, 42, 25, 6638-6640, Vol.42, No.25, pp.6638-6640, 2003.12.
33. Yoshio Iwai, Masashi Higuchi, Hiromasa Nishioka, Yuichi Takahashi, Yasuhiko Arai, Adsorption of Supercritical Carbon Dioxide + 2,6- and 2,7-Dimethylnaphthalene Isomers on NaY-Type Zeolite, Ind. Eng. Chem. Res., 10.1021/ie0302847, 42, 21, 5261-5267, Vol.42, No.21, pp.5261-5267, 2003.08.
34. Masashi Haruki, Yusuke Shimoyama, Yoshio Iwai, Yasuhiko Arai, Calculation of Phase Equilibria for the Low-Boiling-Point Compound + Solvent Binary Systems by Group-Contribution Equation of State, Fluid Phase Equilibria, 10.1016/S0378-3812(02)00271-6, 205, 1, 103-114, Vol.205, pp.103-114, 2003.03.
35. Hun Yong SHIN, Hwayong KIM, Ki-Pung YOO, Chul Soo LEE, Yoshio IWAI and Yasuhiko ARAI, Correlation of Critical Loci for Water-Hydrocarbon Binary Systems by EOS Based on the Multi-Fluid Nonrandom Lattice Theory, Chinese J. Chem. Eng., 10, 6, 661-665, Vol.10, No.6, pp.661-665, 2002.12.
36. Yusuke SHIMOYAMA, Masashi HARUKI, Yoshio IWAI and Yasuhiko ARAI, Measurement and Prediction of Liquid-Liquid Equilibria for Water + Hexane + Hexadecane, Water + Toluene + Decane, and Water + Toluene + Ethylbenzene Ternary Systems at High Temperatures and Pressures, J. Chem. Eng. Data, 10.1021/je020049f, 47, 5, 1232-1236, Vol.47, No.5, pp.1232-1236, 2002.09.
37. Yoshio IWAI, Yasutake KOUJINA, Yasuhiko ARAI, Izumi WATANABE, Isao MOCHIDA and Kinya SAKANISHI, Low Temperature Drying of Low Rank Coal by Supercritical Carbon Dioxide with Methanol as Entrainer, J. Supercritical Fluids, 10.1016/S0896-8446(02)00005-0, 23, 3, 251-255, Vol.23, No.3, pp.251-255, 2002.06.
38. Hidenori HIGASHI, Yoshio IWAI, Tsuyoshi ODA, Yuji NAKAMURA and Yasuhiko ARAI, Concentration Dependence of Diffusion Coefficients for Supercritical Carbon Dioxide + Naphthalene System, Fluid Phase Equilibria, 10.1016/S0378-3812(01)00674-4, 194, 1161-1167, Vol.194-197, pp.1161-1167, 2002.03.
39. Yoshio IWAI, Daisaku TANABE, Morio YAMAMOTO, Taro NAKAJIMA, Machiko UNO and Yasuhiko ARAI, FT-IR Study on Interactions between Solutes and Entrainers in Supercritical Carbon Dioxide, Fluid Phase Equilibria, 10.1016/S0378-3812(01)00746-4, 193, 1-2, 203-216, Vol.193, pp.203-216, 2002.01.
40. Masashi HARUKI, Yoshio IWAI, Yasuhiko ARAI, Prediction of Phase Equilibria for the Mixtures Containing Polar Substances at High Temperatures and Pressures by Group-Contribution Equation of State, Fluid PhaseEquilibria, 10.1016/S0378-3812(01)00557-X, 189, 1-2, 13-30, Vol.189, No.1-2, pp.13-30, 2001.10.
41. Hun Yong SHIN, Masashi HARUKI, Ki-Pung YOO, Yoshio IWAI and Yasuhiko ARAI, Phase Behavior of Water + Hydrocarbon Binary Systems by Using Multi-Fluid Nonrandom Lattice Hydrogen Bonding Theory, Fluid Phase Equilibria, 10.1016/S0378-3812(01)00563-5, 189, 1-2, 49-61, Vol.189, No.1-2, pp.49-61, 2001.10.
42. Hun Yong SHIN, Kota MATSUMOTO, Hidenori HIGASHI, Yoshio IWAI, Yasuhiko ARAI, Development of a Solution Model to Correlate Solubilities of Inorganic Compounds in Water Vapor under High Temperatures and Pressures, J. Supercritical Fluids, 10.1016/S0896-8446(01)00089-4, 21, 2, 105-110, Vol.21, No.2, pp.105-110, 2001.10.
43. Nobumasa TOH, Hun Yong SHIN, Shinichiro MORI, Yoshio IWAI and Yasuhiko ARAI, Comment on "Effect of Local Composition Enhancements on the Esterification of Phthalic Anhydride with Methanol in Supercritical Carbon Dioxide", Ind. Eng. Chem. Res., 10.1021/ie010273i, 40, 20, 4482-4483, Vol. 40, No.20, pp.4482-4483, 2001.10.
44. Shinji MIYAMOTO, Shinichi NAKAMURA, Yoshio IWAI and Yasuhiko ARAI, Measurement of Isothermal Vapor-Liquid Equilibra for Binary and Ternary Systems Containing Monocarboxylic Acid, J.Chem.Eng.Data, 10.1021/je0003849, 46, 5, 1225-1230, Vol.46, No.5, pp.1225-1230, 2001.09.
45. Masashi HARUKI, Yoshio IWAI, Seiji NAGAO and Yasuhiko ARAI, Measurement and Correlation of Liquid-Liquid Equilibria for Water + Aromatic Hydrocarbon Binary Systems at High Temperatures and Pressures, J. Chem. Eng. Data, 10.1021/je010007b, 46, 4, 950-953, Vol.46, No.4, pp. 950-953, 2001.07.
46. Shinji MIYAMOTO, Shinichi NAKAMURA, Yoshio IWAI and Yasuhiko ARAI, Measurement of Isothermal Vapor-Liquid Equilibria for Monocarboxylic Acid + Monocarboxylic Acid Binary Systems with a Flow-Type Apparatus, J.Chem.Eng.Data, 10.1021/je000205n, 46, 2, 405-409, Vol.46, No.2, pp.405-409, 2001.03.
47. Toru ISHIDAO, Yoshio IWAI, Yasuhiko ARAI, Kenji OCHI, Toshiyuki YAMAMURA, Takeshi ISHIKAWA, Bubble Points of Hydrogen Chloride-Water-Isopropanol and Hydrogen Chloride-Water- Isopropanol-Benzene Systems and Liquid-Liquid Equilibria of Hydrogen Chloride-Water- Benzene and Hydrogen Chloride-Water-Isopropanol-Benzene Systems, Fluid Phase Equilibria, 10.1016/S0378-3812(00)00466-0, 178, 1-2, 239-257, Vol.178, No.1-2, pp.239-257, 2001.03.
48. Masashi HARUKI, Yoshio IWAI, Seiji NAGAO, Yukihito YAHIRO, Yasuhiko ARAI, Measurement and Correlation of Phase Equilibria for Water+Hydrocarbon Systems near the Critical Temperature and Pressure of Water, Ind. Eng. Chem. Res., 10.1021/ie000185i, 39, 12, 4516-4520, Vol.39, No.12, pp.4516-4520, 2000.12.
49. Hidenori, HIGASHI, Yoshio IWAI, Yasuhiko ARAI, Calculation of Self-Diffusion and Tracer Diffusion Coefficients near the Critical Point of Carbon Dioxide Using Molecular Dynamics Simulation, Ind. Eng. Chem. Res., 10.1021/ie000173x, 39, 12, 4567-4570, Vol.39, No.12, pp.4567-4570, 2000.12.
50. Shinji MIYAMOTO, Shinichi NAKAMURA, Yoshio IWAI, Yasuhiko ARAI, Measurement of Isothermal Vapor-Liquid Equilibria for Hydrocarbon + Monocarboxylic Acid Binary Systems by a Flow-Type Apparatus, J.Chem.Eng.Data, 10.1021/je000015c, 45, 5, 857-861, Vol.45, No.5, pp.857-861, 2000.09.
51. Yoshio IWAI, Tadaaki MUROZONO, Yasutake KOUJINA, Yasuhiko ARAI, Kinya SAKANISHI, Physical Properties of Low Rank Coals Dried with Supercritical Carbon Dioxide, Journal of Supercritical Fluids, 10.1016/S0896-8446(00)00059-0, 18, 1, 73-79, Vol.18, pp.73-79, 2000.08.
52. Yoshio IWAI, Kohei YOSHIDA, Yasuhiko ARAI, Gerrit SCHUURMANN, Bjorn LOEPRECHT, Walter M.F.FABIAN, Takahiro SUZUKI, Analysis of the Flow Patterns of Liquid Organic Compounds between Blade Electrodes by Classification Models, J.Chem.Inf.Comput.Sci., 10.1021/ci990145t, 40, 4, 988-993, Vol.40, No.4, pp.988-993, 2000.07.
53. Morio YAMAMOTO, Yoshio IWAI, Taro NAKAJIMA, Daisuke TANABE, Yasuhiko ARAI, Correlation of Solubilities and Entrainer Effects for Fatty Acids and Higher Alcohols in Supercritical Carbon Dioxide Using SRK Equation of State with Association Model, J.Chem.Eng.Japan, 10.1252/jcej.33.538, 33, 3, 538-544, Vol.33, No.3, pp.538-544, 2000.06.
54. Yoshio, IWAI, Yashiko MORI, Yasuhiko ARAI, Monte Carlo Simulation for Solubilities of Polycyclic Aromatic Hydrocarbons in Supercritical Carbon Dioxide：Lennard-Jones Potentials for Supercritical Carbon Dioxide+Polycyclic Aromatic Hydrocarbon Systems from Benzene to Graphite, Fluid Phase Equilibria, 10.1016/S0378-3812(99)00312-X, 167, 1, 33-40, Vol.167, No.1, pp.33-40, 2000.01.
55. Yoshio IWAI, Yasuhiko ARAI, Hiroshi ITAHARA and Norihiro ITO, Effect of Electric Field on Normal Freezing Process of 3,5-Xylenol+ Naphthalene System, Ind. Eng. Chem. Res., 10.1021/ie990301l, 38, 12, 4857-4859, Vol.38, No.12, pp.4857-4859, 1999.12.
56. Hidenori HIGASHI, Yoshio IWAI, Yuji NAKAMURA, Shinobu YAMAMOTO and Yasuhiko ARAI, Correlation of Diffusion Coefficients for Naphthalene and Dimethylnaphthalene Isomers in Supercritical Carbon Dioxide, Fluid Phase Equilibria, 10.1016/S0378-3812(99)00296-4, 166, 1, 101-110, Vol.166, No.1, pp.101-110, 1999.12.
57. Tatsuo MOROTOMI,Yoshio IWAI, Hidetoshi YAMAGUCHI and Yasuhiko ARAI, High-Pressure Vapor-Liquid Equilibria for Carbon Dioxide + Limonene + Linalool, J. of Chem. Eng. Data, 10.1021/je990096g, 44, 6, 1370-1372, Vol.44, No.6, pp.1370-1372, 1999.11.
58. Morio YAMAMOTO, Yoshio IWAI and Yasuhiko ARAI, Monte Carlo Simulation for pVT Relationship of CO2+n-C4H10 and CO2+i-C4H10 Systems, Fluid Phase Equilibria, 10.1016/S0378-3812(99)00228-9, 163, 2, 165-173, Vol.163, pp.165-173, 1999.09.
59. Yoshio IWAI, Shin YAMANAGA and Yasuhiko ARAI, Calculation of Normal Boiling Points for Alkane Isomers by a Second Order Group Contribution Method, Fluid Phase Equilibria, 10.1016/S0378-3812(99)00203-4, 163, 1, 1-8, Vol.163, pp.1-8, 1999.09.
60. Masashi HARUKI, Yukihito YAHIRO, Hidenori HIGASHI, Yoshio IWAI, Yasuhiko ARAI, Correlation of Phase Equilibria for Water + Hydrocarbon Systems at High Temperatures and Pressures by Cubic Equation of State, J. Chem. Eng. Japan, 10.1252/jcej.32.535, 32, 4, 535-539, Vol.32, No.4, pp.535-539, 1999.08.
61. Yoshio IWAI, Yasuhiko MORI, Hirohisa UCHIDA and Yasuhiko ARAI, Modification of Parameters in Group Contribution Method to Distinguish Isomers Based on Information by Monte Carlo Simulation, Fluid Phase Equilibria, 10.1016/S0378-3812(99)00080-1, 158, 357-366, Vol.158-160, pp.357-366, 1999.06.
62. Measurement and Correlation of Isoprene-Maleic Anhydride Reaction Rate in Hexane-Nitrobenzene Mixture, Yusuke INOUE, Tomotaka NISHIKAWA, Masaki SATO, Yoshio IWAI, Yasuhiko ARAI, Haruo KATO, Kagaku Kogaku Ronbunshu.
63. Morio YAMAMOTO, Yoshio IWAI, Taro NAKAJIMA and Yasuhiko ARAI, Fourier Transform Infrared Study on Hydrogen Bonding Species of Carboxylic Acids in Supercritical Carbon Dioxide with Ethanol, J. Phys. Chem. A, 10.1021/jp984604p, 103, 18, 3525-3529, Vol.103, No.18, pp.3525-3529, 1999.05.
64. Nobuyuki OHTANI, Toru ISHIDAO, Yoshio IWAI, Yasuhiko ARAI, Hydrolysis of Starch or Pullulan by Glucoamylase or Pullulanase Immobilized on Poly(N-Isopropylacrylamide) Gel, Colloid Polym Sci., 10.1007/PL00013743, 277, 2-3, 197-202, Vol.277, pp.197-202, 1999.02.
65. Shinji MIYAMOTO, Shinichi NAKAMURA, Yoshio IWAI, Yasuhiko ARAI, Measurement of Vapor-Phase Compressibility Factors of Monocarboxylic Acids Using a Flow-Type Apparatus and Their Association Constants, J.Chem.Eng.Data, 10.1021/je980150d, 44, 1, 48-51, Vol.44, No.1, pp.48-51, 1999.01.
66. Keijiro KAKISAKA, Takashi SHINDO, Toru ISHIDAO, Yoshio IWAI, Yasuhiko ARAI, Partition Coefficients of Amino Acids, Peptides, and Enzymes in Dextran + Poly(Ethylene Glycol) + Water Aqueous Two-Phase Systems, J.Chem.Eng.Japan, 10.1252/jcej.31.991, 31, 6, 991-995, Vol.31, No.6, pp.991-995, 1998.12.
67. Yoshio IWAI, Norihiro ITO, Kohei YOSHIDA, Yasuhiko ARAI, Hiroshi ITAHARA, Effect of an Electric Field on the Solidification Process of the 3,5-Xylenol + Naphthalene System, Ind.Eng.Chem. Res., 10.1021/ie980141y, 37, 9, 3782-3785, Vol.37, No.9, pp.3782-3785, 1998.09.
68. Tomotaka NISHIKAWA, Yusuke INOUE, Masaki SATO, Yoshio IWAI, Yasuhiko ARAI, Isoprene-Maleic Anhydride Reaction Rate in Hexane-Nitrobenzene Mixture near Critical Points, AIChE J., 10.1002/aic.690440723, 44, 7, 1706-1708, Vol.44, No.7, pp.1706-1708, 1998.07.
69. Yoshio IWAI, Michitaka AMIYA, Tadaaki MUROZONO, Yasuhiko ARAI, Kinya SAKANISHI, Drying of Coals by Using Supercritical Carbon Dioxide, Ind.Eng.Chem.Res., 10.1021/ie9709493, 37, 7, 2893-2896, Vol.37, No.7, pp.2893-2896, 1998.07.
70. Hidenori, HIGASHI, Yoshio IWAI, Hirohisa UCHIDA, Yasuhiko ARAI, Diffusion Coefficients of Aromatic Compounds in Supercritical Carbon Dioxide Using Molecular Dynamics Simulation, J.Supercritical Fluids, 13, 1-3, 93-97, Vol.13, pp.93-97, 1998.06.
71. Yoshio IWAI, Hirohisa UCHIDA, Yasuhiko ARAI, Yasuhiko MORI, Monte Carlo Simulation of Solubilities of Naphthalene, Phenanthrene, and Anthracene in Supercritical Fluids, Fluid Phase Equilibria, 10.1016/S0378-3812(97)00262-8, 144, 1-2, 233-244, Vol.144, pp.233-244, 1998.02.
72. Hirohisa UCHIDA, Yoshio IWAI, Mitsuru NITTA, Yasuhiko ARAI, Impulse Response Analysis for Adsorption of 2,6- and 2,7 Dimethylnaphthalenes in Supercritical Carbon Dioxide Using NaY-Type Zeolite, Ind.Eng.Chem. Res., 10.1021/ie9704051, 37, 2, 595-598, Vol.37, No.2, pp.595-598, 1998.02.
73. Hidenori HIGASHI, Yoshio IWAI, Yuichi TAKAHASHI, Hirohisa UCHIDA, Yasuhiko ARAI, Diffusion Coefficients of Naphthalene and Dimethylnaphthalene in Supercritical Carbon Dioxide, Fluid Phase Equilibria, 10.1016/S0378-3812(97)00265-3, 144, 1-2, 269-278, Vol.144, pp.269-278, 1998.02.
Presentations
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1. Phase Equilibria of Supercritical Fluids and Molecular Simulations.
Membership in Academic Society
  • The Society of Separation Process Engineers, Japan
Awards
  • Gas chromatographic determication of infinite dilution activity coefficients for alcohols, ketones and aromatic hydrocarbons in 4-methyl-N-butylpyridinium tetrafluoroboronate and 1-butyl-3-methylimidazolium hexafluorophosphate
Educational
Educational Activities
My lectures
for master course students : phase equilibrium
for undergraduate students :chemical physics for process design
Student experiment 1

I issued text book “Chemical physics for engineering, ed. by Y. Arai and Y.Iwai, Asakurasyoten(1991).”
Other Educational Activities
  • 2005.09.
Social
Professional and Outreach Activities
According to the requests from engineers of several companies, advices and suggestions are given mainly in the subjects of fluid properties and phase equilibria. Also, supercritical fluid (SCF) technologies and properyies of chemical engineering are discussed through the SCF and fandamental property divisions of the Society of Chemical Engineers of Japan..


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