超临界乙醇中木质素解聚的宏观动力学模型  

Macro-kinetics Model of Lignin Depolymerization in Supercritical Ethanol

作　　者：王智玉 廖玮婷 谢雷 聂笃宪[2] 解新安[1] WANG Zhi-yu;LIAO Wei-ting;XIE Lei;NIE Du-xian;XIE Xin-an(College of Food Science,South China Agricultural University,Guangzhou 510642,Guangdong,P.R.China;College of Mathematics and Informatics,South China Agricultural University,Guangzhou 510642,Guangdong,P.R.China)

机构地区：[1]华南农业大学食品学院,广东广州510642 [2]华南农业大学数学与信息学院,广东广州510642

出　　处：《林产工业》2021年第6期55-60,共6页China Forest Products Industry

基　　金：国家自然科学基金项目(21576107)。

摘　　要：木质素反应动力学是控制木质素解聚反应深度、提高产物选择性的重要依据。基于缩芯模型,建立木质素在超临界乙醇中解聚的宏观动力学模型,并根据试验结果,优化求解动力学方程的参数,分别得到了木质素解聚反应过程和气膜传质过程的活化能,发现木质素在超临界乙醇作用下的解聚过程主要受化学反应过程控制。根据试验结果对建立的宏观动力学模型进行验证,木质素转化率的模拟值与试验值基本吻合。Lignin reaction kinetics was an important basis for controlling the depth of lignin depolymerization and improving the selectivity of products.Based on the shrinking core model,the kinetic equation of lignin depolymerization in supercritical ethanol was derived.According to the test results,the parameters of the kinetic equation were optimized,and the activation energies of the chemical reaction process and the gas film mass transfer process were obtained.It was found that the depolymerization process was mainly controlled by the chemical reaction.The macro-kinetics model was validated using experimental data at different reaction temperatures,and the simulated values of lignin conversion were in good agreement with the experimental values.

关 键 词：木质素 乙醇 超临界 缩芯模型 动力学 

分 类 号：TS6[轻工技术与工程] X7[环境科学与工程—环境工程]