Two-step hydrolysis of Japanese cedar as treated by semi-flow hot-compressed water
Two-step hydrolysis of Japanese cedar as treated by semi-flow hot-compressed water
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DOI：
10.1007/s10086-009-1099-0
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发表时间：
2010-01-01
影响因子：
2.9
通讯作者：
Saka, Shiro
中科院分区：
文献类型：
--
作者：
Phaiboonsilpa, Natthanon;Yamauchi, Kazuchika;Saka, Shiro
Two-step hydrolysis of Japanese cedar (Cryptomeria japonica) was studied as treated by semi-flow hot-compressed water at 230 degrees C/10 MPa for 15 min and 280 degrees C/10 MPa for 30 min as the first and second stages, respectively. At the first stage, hemicelluloses and paracrystalline cellulose, whose crystalline structure is somewhat disordered, were found to be selectively hydrolyzed, as well as lignin decomposition, whereas crystalline cellulose occurred at the second stage. In all, 87.76% of Japanese cedar could be liquefied by hot-compressed water and was primarily recovered as various hydrolyzed products, dehydrated, fragmented, and isomerized compounds as well as organic acids in the water-soluble portion. The remainder, 12.24%, could not be hydrolyzed and remained as the water-insoluble residue composed entirely of lignin. Based on the distribution of various products from hemicelluloses in Japanese cedar, their decomposition pathways were proposed as independent.
