煤多段加氢热解过程的DAEM动力学解析  

Distributed Activation Energy Model for Kinetic Analysis of Multi-Stage Hydropyrolysis of Coal

作　　者：刘旭光[1] 李文[1] 王娜[1] 李保庆[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤炭转化国家重点实验室

出　　处：《中国矿业大学学报》2003年第6期683-688,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金重点项目(29936090);山西省自然科学基金(200110014);山西省回国留学人员科研基金(99024)

摘　　要：以分布活化能模型(DAEM)的最新分析为基础,将双中心无限平行反应假设引入加氢热解过程,对线形升温与两段停留操作方式下的加氢热解过程(多段加氢热解)进行了数学描述,对寻甸褐煤的催化加氢热解过程进行了数学模拟,发现催化剂的使用不仅能够降低反应体系的活化能,而且能够使活化能分布的范围变窄,多段停留升温方式同样降低了反应体系的活化能,且催化剂的用量存在最佳值0.2％.模型回归显著性分析表明所提出的数学模型可有效地表述煤的多段加氢热解过程.Based on the new analysis of distributed activation energy model, a bicentral distribution model was introduced to the analysis of multi-stage hydropyrolysis of coal. The hydropyrolysis for linear temperature programming with and without holding stage were mathematically described and the corresponding kinetic expressions were achieved. Based on the kinetics, the hydropyrolysis (HyPy) and multi-stage hydropyrolysis (MHyPy) of Xundian brown coal was simulated. The result shows that both Mo catalyst and 2-stage holding can lower the apparent activation energy of hydropyrolysis and make activation energy distribution become narrow. Besides, there exists an optimum Mo loading of 0. 2% for HyPy of Xundian lignite.

关 键 词：DAEM模型 动力学 多段加氢热解 催化剂 分布活化能模型 煤炭 

分 类 号：TQ533[化学工程—煤化学工程]