2022 Fiscal Year Final Research Report
Development of functionalized carbon supported metal catalyst for one-pot conversion of xylose oligomers to xylitol
| Project/Area Number |
21K14461
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 27030:Catalyst and resource chemical process-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2023-03-31
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| Keywords | 炭素担持金属触媒 / キシリトール / 水素化 / キシロース / キシロビオース |
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| Outline of Final Research Achievements |
This research aims at selective production of xylitol at relatively low hydrogen pressure from depolymerized hemicellulose, which is a mixture of xylose and its dimers and trimers. First, I investigated the catalyst which produced xylitol from xylose reagent at high yield. A carbon-supported Cu catalyst using a weakly acidic cation exchange resin as a precursor, Cu@C, was found to have high xylitol selectivity and thermal stability. Then the Cu@C catalyst was used for xylitol production from xylobiose (xylose dimer). The hydrolysis of xylobiose to xylose and the hydrogenation of xylose proceeded selectively and only xylitol was obtained. We found that an increase in the hydrolysis rate of xylose oligomers is important for the synthesis of xylitol from depolymerized hemicellulose mixture.
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| Free Research Field |
触媒反応工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，イオン交換樹脂を前駆体に用いた触媒調製法により銅を微粒子状態で炭素担体に包接した触媒により低水素圧下で優れたキシリトール選択性かつ熱安定性を実現した．従来の触媒調製法では，金属を炭素担体等の不活性担体に強固に固定化することが困難であったが，本成果は新たな炭素担持金属触媒調製法の提案と炭素担持金属触媒を用いた高選択的な反応系の開拓につながると考える．また，混合物原料からの反応に関する知見を今後増やしていくことで，複雑な反応系の理解といった学術的な意義に加え，分離精製コストの高いバイオマス利用の実用化という社会的な意義を持つ．
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