化工学报 ›› 2015, Vol. 66 ›› Issue (S1): 302-307.DOI: 10.11949/j.issn.0438-1157.20150151

• 能源和环境工程 • 上一篇    下一篇

瞬间弹射蒸汽爆破增强离子液体对水稻秸秆的预处理效果

覃锦程, 郝学密, 刘黎阳, 刘晨光, 白凤武   

  1. 大连理工大学生命科学与技术学院, 辽宁 大连 116024
  • 收稿日期:2015-01-30 修回日期:2015-02-06 出版日期:2015-06-30 发布日期:2015-06-30
  • 通讯作者: 刘晨光
  • 基金资助:

    国家自然科学基金项目(21406030);中国博士后科学基金特别资助(2013T60286);中央高校基本科研业务费专项资金资助(DUT14QY19)。

Enhanced effects of ionic liquid pretreatment on rice straw by instant catapult steam explosion

QIN Jincheng, HAO Xuemi, LIU Liyang, LIU Chenguang, BAI Fengwu   

  1. School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2015-01-30 Revised:2015-02-06 Online:2015-06-30 Published:2015-06-30
  • Supported by:

    supported by the National Natural Science Foundation of China (21406030), China Postdoctoral Science Special Foundation (2013T60286), Fundamental Research Funds for Central Universities (DUT14QY19).

摘要:

选取具有不同组分分离效果的离子液体1-乙基-3-甲基咪唑醋酸盐([Emim]Ac)和1-乙基-3-甲基咪唑氯盐([Emim]Cl), 并联用瞬间弹射蒸汽爆破(instant catapult steam explosion, ICSE)对水稻秸秆进行预处理。离子液体导致了组分的重排, 使纤维素更多地暴露于物料表面, 同时减弱了木质素对纤维素紧密交联的程度。ICSE的使用提升了离子液体的预处理效果, 酶解糖收率比单纯使用离子液体升高了14.83%([Emim]Ac)和13.14%([Emim]Cl), 其中ICSE联用[Emim]Ac的糖收率最高达97.00%。采用扫描电镜(SEM)和热重分析仪(TGA)进行物料结构分析, 证实了ICSE联用离子液体有助于破坏物料的致密结构, 增加无定形区, 从而提高酶解糖收率。

关键词: 离子液体, 生物燃料, 生物质, 瞬间弹射蒸汽爆破, 预处理

Abstract:

In this study, two kinds of ionic liquid, including 1-ethyl-3-methylimidazolium acetate and 1-ethyl-3-methylimidazolium chloride were used to pretreat rice straw with instant catapult steam explosion (ICSE). The rearrangement of components were caused by ionic liquid pretreatment, which made more cellulose exposed at the surface of rice straw and weakened the cross-link between lignin and cellulose. Through enzymatic hydrolysis analysis, ICSE enhanced the effects of ionic liquid pretreatment by improving the sugar yield. Compared with the sugar yield as using ionic liquid alone, the sugar yield as combination of ICSE and ionic liquid increased by 14.83% ([Emim]Ac) and 13.14% ([Emim]Cl). The highest value reached 97.00% under the pretreatment by ICSE combine with [Emim]Ac. The structural changes were also analyzed by scanning electron microscope (SEM) and thermo gravimetric analysis (TGA). The pretreated materials became more porous with larger amorphous region, and consequently the sugar yield raised.

Key words: ionic liquids, biofuel, biomass, instant catapult steam explosion, pretreatment

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