2022 Fiscal Year Research-status Report
Analyses of the Synergy of Sub/Supercritical H2O-CO2 System for Synthesis of Green Platform Chemicals
| Project/Area Number |
17KK0118
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| Research Institution | Kumamoto University |
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Principal Investigator |
キタイン アルマンド 熊本大学, 大学教育統括管理運営機構, 教授 (50504693)
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| Project Period (FY) |
2018 – 2023
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| Keywords | hydrolysis / deamination / glycerol / supercritical CO2 / Raman spectroscopy / reduction / sugars / 5-HMF |
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| Outline of Annual Research Achievements |
In the latter half of AY2022, researchers' mobility was possible due to the easing of COVID-19 travel restrictions. The following research activities and outcomes were achieved:
1. The experimental results on nanodiamond provided by host professor on sugar conversion to platform chemicals were compared with graphene oxide-based catalysts under microwave irradiation, showing the latter to have significantly positive effect on reaction. However, stability of the catalysts especially under high reaction temperatures needs to be verified.
2. Detailed analysis of the CO2-H2O synergy on the degradation of amino acids, removal of sugar moieties from flavonoid glycosides and glycerol conversion to fuel additives were performed, showing unique synergistic effect on reactions.
3. The integration of this CO2-H2O synergy on carbon-based catalyst surface was also verified to have promising effect on reactions.
The research outcomes gained popularity and interests among researchers working in the fields of green chemistry and engineering, and were presented in related academic conferences overseas either as invited or keynote lectures. Overseas European host professors were also invited to give online (or in-person) lectures to young researchers in Kumamoto University.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
The application of CO2-H2O synergy was applied to various environmentally important reactions showing unique and significant effects. To pursue further investigation and analysis of these phenomenal properties of CO2-H20 mixture, JSPS Bilateral Joint Research Project between Kumamoto University and Valladolid University (Spain) has recently been granted.
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| Strategy for Future Research Activity |
Further investigation and analysis of the phenomenal properties of CO2-H20 mixture will be pursued on various environmentally important reactions, including catalytic hydrothermal conversion of CO2 into useful chemicals or fuels, sugar conversion to useful chemicals, removal of sugar moieties from flavonoid glycosides focusing on the direct cleavage of the disaccharides, among many possible reactions. The stability of carbon catalysts (including nanodiamond) will also be verified. The principal investigator will visit the host institutions in Europe to work further on the functionalization of these carbon-based catalysts, experiments with CO2-H2O synergistic effects and in-situ Raman spectroscopy, if possible with his young Japanese students. We will also continue both online (and in-person) academic exchanges with the host professors to further strengthen the collaboration and to motivate young researchers.
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Research Products
(14 results)
