| Project/Area Number |
26630406
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Catalyst/Resource chemical process
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| Research Institution | The University of Tokyo |
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Principal Investigator |
TAKAGAKI Atsushi 東京大学, 工学(系)研究科(研究院), 助教 (30456157)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | バイオマス / 固体酸 / メカノケミカル / セルロース / メカノキャタリシス |
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| Outline of Final Research Achievements |
Direct depolymerization of crystalline cellulose into water-soluble sugars by solvent-free ball milling was examined in the presence of a strongly acidic layered metal oxide, HNbMoO6, resulting in full conversion with 72% yields of water-soluble sugars. Measurements by 13C magic angle spinning nuclear magnetic resonance spectroscopy and x-ray diffraction revealed that amorphization of cellulose rapidly occurred, which did not affect the results of depolymerization. Scanning electron microscopy equipped with an energy dispersive x-ray indicated that the substrate and the catalyst were well mixed within 10 min with the catalyst becoming embedded in cellulose particles during milling. Time-course of product distribution showed that most of the resultant water-soluble sugars were produced not via successive degradation of oligosaccharides but via direct depolymerization of cellulose long chains. The products included glucose, mannose and cello-oligomers as well as anhydrosugars.
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