摘要
在间歇式高温高压反应釜中,以Cu/Zn/Al金属氧化物为催化剂,对木质素在超临界甲醇中液化的影响因素进行研究,并对其液化反应动力学进行分析.结果表明,在反应温度340℃,反应时间3 h,催化剂添加量30 mg,料液比(木质素质量与甲醇体积比)为20∶1时,木质素液化转化率可达94.26%.采用一级化学反应动力学模型进行分析,木质素在超临界甲醇中液化反应的表观活化能为55.217 k J/mol,频率因子为50 513.7 s-1,反应动力学模型方程为dαdt=50 513.7e-55.217RT(1-α).
The influential factors of liquefaction of lignin in supercritical methanol with Cu / Zn / Al oxides as catalysts are studied,and the liquefaction kinetics is analyzed. The experimental results show that the optimum liquefaction conditions are reaction temperature of 340℃,holding time of 3h,catalyst dosage of 30 mg,and lignin mass to methanol volume ratio of 20∶ 1 mg / m L,which results in an overall conversion of 94. 26% for lignin. The first- order reaction kinetic analysis indicates that the apparent activation energy is 55. 217 k J / mol,frequency factor is 50 513. 7 s^- 1,and kinetics equation isdαdt= 50 513. 7 e-55. 217/RT（ 1- α）.
出处
《昆明理工大学学报（自然科学版）》
CAS
2016年第1期20-24,38,共6页
Journal of Kunming University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(51266003)
关键词
木质素
催化液化
超临界甲醇
动力学分析
lignin
catalytic liquefaction
supercritical methanol
kinetic analysis
