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Physicochemical characterization and enzymatic digestibility of Chinese pennisetum pretreated with 1-ethyl-3-methylimidazolium acetate at moderate temperatures

文献类型： 外文期刊

作者： Xin, Donglin 1 ; Yang, Ming 1 ; Zhang, Yage 1 ; Hou, Xincun 2 ; Wu, Juying 2 ; Fan, Xifeng 2 ; Wang, Jingfeng 1 ; Zhang, 1 ;

作者机构： 1.Northwest A&F Univ, Coll Forestry, 3 Taicheng Rd, Yangling 712100, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Beijing Res & Dev Ctr Grass & Environm, Beijing 100097, Peoples R China

关键词： Chinese pennisetum;Ionic liquid;Pretreatment;Moderate temperature;Enzymatic hydrolysis

期刊名称：RENEWABLE ENERGY （ 影响因子：8.001； 五年影响因子：7.435 ）

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收录情况： SCI

摘要： 1-ethyl-3-methylimidazolium acetate ([EMIM] AC) pretreatment at moderate temperatures (60 degrees C and 75 degrees C) was evaluated for improving hydrolysability of Chinese pennisetum, a leading candidate as an energy crop, for bioethanol production. The pretreatment caused slight carbohydrate and lignin loss but significantly changed the material physicochemical characters, such as crystallinity and surface structure. Both changes exhibited positive effects on improving the enzymatic digestibility of the Chinese pennisetum. It was observed that approximately 90% of the cellulose and 50% of the xylan in the Chinese pennisetum after pretreatment at 75 degrees C were converted to fermentable monosaccharides by the combined cellulases and endo-xylanase. The results suggested that Chinese pennisetum could be effectively pretreated with ([EMIM] AC) pretreatment at moderate temperatures, and the high hydrolysis yield of fermentable sugars from pretreated Chinese pennisetum could be achieved by the synergistic action of accessory xylanase in enzymatic hydrolysis by cellulases. (C) 2016 Elsevier Ltd. All rights reserved.

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