玉米芯发酵乙醇残余物中木素酸化分离过程的研究  

Lignin Separation from Residues of Corncob Bioethanol Production

作　　者：王霞[1] 王高升[1] 肖林 夏蕊蕊 

机构地区：[1]天津市制浆造纸重点实验室,天津科技大学造纸学院,天津300457 [2]山东省秸秆生物炼制技术重点实验室,山东龙力生物科技股份有限公司,德州251200

出　　处：《天津科技大学学报》2016年第6期44-49,共6页Journal of Tianjin University of Science & Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2014AA021903);天津市高等学校科技发展基金资助项目(20080522)

摘　　要：为了提高纤维素乙醇生产的经济效益,最大限度地利用发酵残余物,木素的分离利用是十分重要的.以玉米芯发酵乙醇残余物为原料,采用碱溶–酸沉淀的方法分离木素,讨论酸沉淀过程p H、温度对木素得率的影响,并且对木素酸化过程中Zeta电位、粒径大小及分布、聚集体形态进行分析.从木素得率和分离操作性综合考虑,p H为3左右,酸化温度65,℃时,从玉米芯发酵乙醇残余物中分离木素将会取得较好的效果.To improve the economic viability of the cellulosic ethanol production, it is of great importance to add value to residues of bioethanol production. In this research, lignin was separated from the fermentation residues of the corncob etha- nol production with a solid-liquid extraction method using alkali solution and then precipitated by sulfuric acid. The yields of lignin and zeta potential change through the acidification process were reported, and the morphology and size distribution of lignin aggregates were investigated. While taking the lignin yield and practicability into consideration, pH about 3.0 and temperature 65℃are the most suitable acidification conditions for lignin separation.

关 键 词：玉米芯 发酵乙醇残余物 木素 分离 酸化 

分 类 号：O636.2[理学—高分子化学]