2004 Fiscal Year Final Research Report Summary
Elucidation of chemical synthesis from sugar and solvent effect on the reaction using supercritical microreactor
| Project/Area Number |
14350413
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
反応・分離工学
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
ADSCHIRI Tadafumi TOHOKU UNIVERSITY, INSTITUTE OF MULTIDISCIPLINARY RESEARCH FOR ADVANCED MATERIALS, Professor, 多元物質科学研究所, 教授 (60182995)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAMI Seiichi TOHOKU UNIVERSITY, INSTITUTE OF MULTIDISCIPLINARY RESEARCH FOR ADVANCED MATERIALS, Research Associate, 多元物質科学研究所, 助手 (40311550)
UMETSU Mitsuo TOHOKU UNIVERSITY, INSTITUTE OF MULTIDISCIPLINARY RESEARCH FOR ADVANCED MATERIALS, Research Associate, 多元物質科学研究所, 助手 (70333846)
SASAKI Mitsuru KUMAMOTO UNIVERSITY, THE FACULTY OF ENGINEERING, Research Associate, 工学部, 助手
OHARA Satoshi TOHOKU UNIVERSITY, INSTITUTE OF MULTIDISCIPLINARY RESEARCH FOR ADVANCED MATERIALS, Researcher, 多元物質科学研究所, 研究機関研究員
SUE Kiwamu TOHOKU UNIVERSITY, GRADUATE SCHOOL OF ENGINEERING, Research Associate, 大学院・工学研究科, 助手 (60333845)
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| Project Period (FY) |
2002 – 2004
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| Keywords | Supercritical fluids / water / cellulose / Sugar / hydrolysis / reaction mechanism |
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| Research Abstract |
We investigated chemical synthesis from sugar in supercritical water, focusing on glycol acid as a bio-degradable material. In this research, process conditions are surveyed to recover glycol aldehyde.
First of all, we analyzed decomposition process of glycol using micro-reactors. Glycols decomposed to erythrose and then glycol aldehyde by retroaldol reaction. Glycol aldehyde is converted into fructose by tautomerism and finally decomposed into glyceraldehyde and pyruvaldehyde. These reactions were accompanied with dehydration.
We estimated the reaction rate and its dependency on temperature, using micro-reactors, and revealed that higher temperature and lower water concentration promotes retroaldol reaction instead of dehydration and tautomerism. The reaction at 450℃ in water with a density of 0.1g/cm^3 produced glycol acid with a yield of 89%. We also confirmed glycol aldehyde reacted into glycol acid by Cannizzaro reaction.
The reaction rate was estimated as several tens msec, indicating that small reactor is required to enable industrial processes. We showed that the remained research theme are reaction conditions for conversion to glycol acid, reaction of concentrated reactants for industrial process, and utilization of heat from other industry.
We, further, estimated solvent effect on reaction time and the possibility of a new synthesis method for sugar, cellulose, amino acids, and lignin, using micro-reactors.
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