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化工学报  2013 

离子液体预处理油料作物木质纤维素

DOI: 10.3969/j.issn.0438-1157.2013.z1.015, PP. 104-110

Keywords: 离子液体,生物燃料,生物质,油料作物,木质纤维素,预处理

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Abstract:

选取了3种离子液体:氯化1-丁基-3-甲基咪唑([Bmim]Cl)、溴化1-丁基-3-甲基咪唑([Bmim]Br)以及氯化1-辛基-3-甲基咪唑([Omim]Cl),对油料作物木质纤维素部分:花生秸秆、花生壳以及油菜秸秆进行了预处理。对处理前后的物料进行了组分、酶解产糖以及结构分析。原料经酶解后,花生秸秆的产糖率最高(54.31%),且木质素含量最低,表明其更利于生物燃料的生产。3种离子液体中[Bmim]Cl预处理效果最好,产糖率最高可达85.43%(花生秸秆)。采用扫描电镜(SEM)和红外光谱(FT-IR)分析,花生秸秆表面最不完整,结构松散,结晶区域少。经离子液体处理后,所有物料均变得疏松多孔,表面粗糙,提高了物料的可及度。在此基础上,分析阴阳离子对于木质纤维素的溶解过程,发现氯离子和[Bmim]+对于纤维素的溶解影响最显著。

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