离子液体碱溶液脱除秸秆中木质素  

Removal of lignin from corn straw by ionic liquid alkali solution

作　　者：刘程[1] 刘振[1] 李龙飞[1] 张世英 许爱荣[1] LIU Cheng;LIU Zhen;LI Longfei;ZHANG Shiying;XU Airong(College of Chemical Engineering&Pharmaceutics,Henan University of Science and Technology,Luoyang 471023,Henan,China)

机构地区：[1]河南科技大学化工与制药学院,河南洛阳471023

出　　处：《化工进展》2018年第5期1789-1794,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(21373078);河南省科技攻关(162102310416);河南省教育技术装备和实践教育研究项目(GZS297)

摘　　要：生物质是来源丰富的可再生资源,去除生物质中的木质素是提高生物质的糖化发酵效率的关键。本文利用含NaOH的离子液体氯化1-烯丙基-3-甲基咪唑([Amim]Cl)溶液对玉米秸秆进行处理,从反应温度、反应时间和固液比3个方面研究其脱除木质素的效果,采用单因素实验和Box-Behnken中心组合实验对反应条件进行优化,对比分析处理前后的秸秆的组成和结构变化。结果表明:在反应温度86.8℃,反应时间1.48h,固液比1∶9g/mL时,处理后秸秆中纤维素含量达到83.69%,木质素含量为3.29%,木质素脱除率达81.73%,反应温度对纤维素含量影响最显著。本工作可为玉米秸秆的资源化利用提供参考。Biomass is a rich source of renewable resources.The saccharification and fermentation efficiency of the biomass can be improved by removing the lignin from the biomass.The temperature,time and solid-liquid ratio were studied by using the 1-allyl-3-methylimidazolium chloride aqueous ionic liquid containing NaOH to treat corn straws.The reaction conditions were optimized by a central composite design.The compositions and structures of the straw before and after the treatment were compared.The experimental results showed that,at the temperature of 86.8℃,time of 1.48h and solid-liquid ratio of 1∶9g/mL,the content of cellulose in the straw was 83.69%,the content of lignin was 3.29%,and the removal rate of lignin was 81.73%;the reaction temperature had the most significant effect on the cellulose content.This work provides insights for the utilization of maize straw.

关 键 词：生物质 离子液体 生物分离 纤维素 脱木质素 碱溶液 

分 类 号：TQ35[化学工程]