| 纤维素在醇-水溶剂中水解及集总动力学研究 |
| |
| 引用本文： | 陈杰,王存文,王为国,张俊峰,刘强,段晓玲. 纤维素在醇-水溶剂中水解及集总动力学研究[J]. 武汉化工学院学报, 2012, 0(2): 14-18 |
| |
| 作者姓名： | 陈杰 王存文 王为国 张俊峰 刘强 段晓玲 |
| |
| 作者单位： | 武汉工程大学绿色化工过程省部共建教育部重点实验室,湖北武汉430074 |
| |
| 基金项目： | 国家自然科学基金资助项目（20976140）;湖北省自然科学基金项目（2008CDA024） |
| |
| 摘 要： | 利用固定床式反应器研究了热压醇-水混合溶剂中处理木质纤维素制备还原糖的工艺条件及动力学.通过对不同反应温度、反应压力、不同溶剂等因素进行考察,发现在温度250℃、压力17 MPa、乙醇-水混合体积比1∶1时,还原糖的收率可达67.53%.以木质纤维素水解过程进行分段集总,提出了三集总动力学,拟合出了17 MPa下,乙醇加入前后,木质纤维素降解的表观活化能分别为119.497和56.784 kJ/mol.结果表明,乙醇-水作为溶剂时更有利于木质纤维素的降解,提高还原糖收率.
|
| 关 键 词： | 木质纤维素 固定床式反应器 还原糖 集总动力学 水解 表观活化能 |
Process and lumped kinetics of cellulose hydrolysis in alcohol-water mixed solvents |
| |
| CHEN Jie,WANG Cun-wen,WANG Wei-guo,ZHANG Jun-feng,LIU Qiang,DUAN Xiao-ling. Process and lumped kinetics of cellulose hydrolysis in alcohol-water mixed solvents[J]. Journal of Wuhan Institute of Chemical Technology, 2012, 0(2): 14-18 |
| |
| Authors: | CHEN Jie WANG Cun-wen WANG Wei-guo ZHANG Jun-feng LIU Qiang DUAN Xiao-ling |
| |
| Affiliation: | (Key Laboratory for Green Chemical Processes of Ministry of Education,School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan 430074,China) |
| |
| Abstract: | The process and kinetics of lignocellulose hydrolysis in hot-compressed alcohol-water mixtures for reducing sugar production in a fixed-bed reactor were investigated.It was found that the yield of reducing sugar could reach 67.53% at a temperature of 250 ℃,a pressure of 17 MPa and a volume ratio of ethanol/water 1∶1.By employing a 3-lump kinetic model,the apparent activation energies of lignocellulose hydrolyses without and with ethanol addition were estimated to be 119.497 and 56.784 kJ/mol,respectively,at the pressure of 17 MPa.The results showed that ethanol-water mixtures as solvent were beneficial to the hydrolysis of lignocellulose and improvement of reducing sugar production. |
| |
| Keywords: | lignocellulose； fixed-bed reactor； reducing sugar； lumped kinetics； hydrolysis； apparent activation energy |
| 本文献已被 维普 等数据库收录！ |
|
