玉米秸秆酸水解制糖新工艺.pdf

安徽农业科学，Journal ofAnhui Agri．Sci．2007，35(35)：11603—11605，11625 责任编辑 姜丽 责任校对 王森 玉米秸秆酸水解制糖新工艺 王欢-，郭瓦力-*，王洪发2孙素荣-，张建军- (1．沈阳化 l：学院化学1二程学院，辽宁沈阳 110142；2．辽宁省沈阳化工研究院，辽宁沈阳 110021) 摘要 『目的1开发新的玉米秸秆酸解糖化工艺，以解决生物质制乙醇技术中酸解糖化法收率低等问题。『方法1采用单因素及正交试 验．考察了带压两段酸水解浓酸段和稀酸段的水解糖化规律和工艺务件。通过两段法浓酸预处理与稀酸水解相结合，对玉米秸秆进行 水解，并对水解爷件进行了优化。『结果1初步确定常压两段酸水解较优的水解工艺条件为：一段浓酸预处理中，酸浓度60％，酸固比 l2：l，水解时间30 min，温度45℃；二段稀酸水解中，水固比220：l，水解时间l20 min，水解温度 100℃。经两段水解后，总糖收率显著 增加，达93．8l％。『结论1首次提出常压两段酸水解工艺，该工艺务件温和、流程简单、成本低廉、总糖收率高、应用前景广阔。 关键词 玉米秸秆：预处理；常压两段酸水解 中图分类号 S216．2 文献标识码 A 文章编号 05l7—66ll(2007)35一l1603—03 New Technology of Producing Sugar by Acid Hydrolysis of Corn Straw WANG Huan et al(College of Chemical Engineering，Shenyang Institute of Chemical Technology，Shenyang，Liaoning 1 10142) e Abstract 【Objective】The aim of the study was to develop the new technology of acid hydrolyzing and saccharifying of corn straw，so as to solv 、 the problem of low yield of acid hydrolysis and saccharifying in the technique of producing ethanol from biomass．[Method】The hydrolysis and saccharifying law and technology conditions in concentrated and diluted acid stages of two-stage acid hydrolysis was examined by single factor and onhogon~experiments．Two-stage method of combining the pretreatment with concentrated acid and hydrolysis with diluted acid was used to hydrolyze corn straw and the hydrolysis condition was optimized，『Result1 It was preliminarily confirmed that the superior conditions of hydrolysis technology for two-stage acid hydrolysis under normal pressure were as f0llows：Acid concentration of 60％。ratio of acid to solid of 1 2：1． hydrolysis time of 0．5 h and temperature of 45℃ in the first stage of pretreatment with concentrated acid；ratio of wat