羟基自由基活性氧处理机械草浆分离半纤维素和木质素  

Separation of hemicellulose and lignin from mechanical straw pulp by hydroxyl radical activated oxygen treatment

作　　者：于跃[1] 陈宣宇[1] 张鹏[1] 

机构地区：[1]北京化工大学生命科学与技术学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2011年第4期115-118,共4页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：北京化工大学研究生科研创新基金(09Si005)

摘　　要：基于生物质精炼与制浆相结合的构想,采用羟基自由基活性氧处理机械草浆,分离半纤维素和木质素,探讨了温度(T)、反应时间(t)、H2O2浓度质量分数(w)和固液比(r)等因素对半纤维素、木质素提取效果的影响。实验结果表明:在T=160℃,t=2 h,w(H2O2)=1.5%,r=5 g/L的反应条件下,半纤维素和木质素脱除率最高,分别达到82.68%,91.22%。Hemicellulose and lignin in mechanical straw pulp have been separated by using hydroxyl radical activated oxygen. Based on a combination of biomass refining and pulping, the effects of varying four factors--reaction temperature （T）, reaction time （t） , H202 mass fraction （w） , and solid-liquid ratio （r）--were investigated. The optimized values of T, t, w, and r were found to be 160 ℃ , 2 h, 1.5% , and 5 g/L, respectively. Under these conditions, removal of hemicellulose and lignin reached the maximum extents of 82.68% , and 91.22% , respectively.

关 键 词：羟基自由基活性氧 机械草浆 半纤维素 木质素 

分 类 号：TS743[轻工技术与工程—制浆造纸工程]