化工进展2018，Vol.37Issue(6)：2159-2165,7.DOI:10.16085/j.issn.1000-6613.2017-1650
NaOH/尿素冻融预处理纤维素及其酸催化水解
Hydrolysis of cellulose in dilute acid solution by NaOH / Urea freeze -melting pretreatment
摘要
Abstract
The hydrolysis of regenerated cellulose into glucose in diluted acid aqueous solution was studied by using NaOH/urea freeze-melting pretreatment system at –18℃.The morphological variation of cellulose pretreated with different ratio of NaOH/urea solution was analyzed by scanning electron microscopy(SEM)and X-ray diffraction(XRD).The results showed that the pretreated cellulose in the NaOH/urea system with a mass ratio of 7%:12% had the most rough surface and the best accessibility,In addition, the crystallinity of the cellulose was significantly decreased and the reactivity was greatly enhanced. A high glucose yield of 58.5% could be obtained at 180℃ in 4h reaction time in 0.025mol/L HCl aqueous solution, which was much higher than that obtained from the untreated cellulose(35.6%),indicating the excellent promoting effect of the pretreatment method on the cellulose hydrolysis. The developed method can be effectively applied to the treatment of the real agricultural wastes such as rice straw and corn stalk.The proposed process for the pretreatment and hydrolysis of cellulose had important scientific significance and application value for the high value utilization of lignocellulosic biomass.关键词
纤维素/NaOH/尿素冻融/水解/葡萄糖/生物质Key words
cellulose/NaOH/urea freeze-melting/hydrolysis/glucose/biomass分类
化学化工引用本文复制引用
邢静润,申锋,仇茉,漆新华..NaOH/尿素冻融预处理纤维素及其酸催化水解[J].化工进展,2018,37(6):2159-2165,7.基金项目
国家自然科学基金(21577073)、天津市自然科学基金重点项目(16JCZDJC33700)及中国农业科学院创新工程协同创新项目和青年英才项目. （21577073）
