3-4-2 リグノセルロース植物の半流通型2段階加圧熱水処理による化学変換比較(3-4 水熱・超臨界1,Session3 バイオマス等,研究発表)

概要

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Japanese beech (Fagus crenata) xylem as one of the hardwoods, dicotyledonous angiosperms, nipa (Nypa fruticans) frond as one of the monocotyledonous angiosperms, and Japanese cedar (Cryptomeria japonica) xylem as one of the softwoods, gymnosperms, were treated by two-step semi-flow hot-compressed water at 230℃/10MPa/15min and 270℃/10MPa/15min. In the first stage at 230℃/10MPa, hemicellulose was selectively hydrolyzed as well as lignin being decomposed partly, while cellulose in the second stage at 270℃/10MPa. Japanese beech and nipa frond showed approximately the same degree in lignin decomposition, whereas lesser decomposition, thus lesser liquefaction in Japanese cedar lignin was observed. Although Japanese beech and nipa frond share some similarities in their chemical composition, the latter was found to be more resistant to hydrolysis.
2011-08-09