Proceedings of the Annual Conference of The Japan Institute of Energy
Online ISSN : 2423-8325
Print ISSN : 2423-8317
ISSN-L : 2423-8317
[volume title in Japanese]
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P-3-14 Fractionation of beech wood into cellulose-rich residue and lignin-rich precipitates by semi-flow hydrothermal treatment
Enhancement of both enzyme digestibility of residue and photoluminescence property of precipitates by addition of 2-naphthol
Masatsugu TAKADAYutaka OKAZAKIShinya KAJITAHaruo KAWAMOTOTakashi SAGAWA
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Pages 194-195

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Abstract

Semi-flow hydrothermal treatment of beech (Fagus crenata) wood was used to fractionate its cell wall component into cellulose-rich insoluble residue and lignin-rich precipitates, and the evaluation of the enzyme-medicated digestibility of the insoluble residue and the photoluminescence properties of the precipitate were investigated. For the residue, enzymatic saccharification was greatly enhanced by the improvement of enzyme accessibility. In contrast, the precipitates dissolved in DMSO and its solution showed obvious photoluminescence by controlling the chromophore distances. Furthermore, 2-naphthol, a carbocation scavenger that inhibits lignin recondensation, was impregnated into wood flour prior to the hydrothermal treatment. As a result, the digestibility of cellulose component in the residue was improved since the formation of unproductively-binding between lignin and enzyme was suppressed along with the suppression of lignin recondensation. In contrast, the photoluminescence intensity of the precipitates was significantly enhanced, suggesting that 2-naphthol bound to the side-chain of lignin molecule contributed to the photoluminescence properties of the lignin. This information would give us a clue to utilize the whole cell wall component.

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