高温煤焦/CO_2气化反应的动力学研究  

STUDY ON KINETICS OF CHAR-CO_2 GASIFICATION

作　　者：顾菁 吴诗勇[2] 吴幼青[2] 高晋生[2] 

机构地区：[1]广州市昊晟工程勘察设计有限公司,广州博士工程师528300 [2]华东理工大学资源与环境工程学院,上海副教授200237

出　　处：《煤炭转化》2013年第1期39-42,46,共5页Coal Conversion

基　　金：国家重点基础研究规划项目(2004CB217704)

摘　　要：对煤气化随机孔模型的动力学控制区的假设进行了改进,建立了高温煤焦/CO2气化反应碳转化率(X)与反应时间(t)的修正随机孔模型:X=1-exp[-kt(a+bkt+k2t2)],并在950℃～1 400℃气化温度范围内,用修正随机孔模型模拟淮南慢速热解煤焦和淮南快速热解煤焦/CO2气化反应,所得表观活化能范围分别为121.99kJ/mol～153.75kJ/mol和88.57kJ/mol～121.39kJ/mol.结果表明,修正随机孔模型的拟合效果优于随机孔模型和收缩未反应芯模型的拟合效果,能很好地体现煤焦气化反应的动力学特征,且该模型适用于不同煤焦的气化反应模拟.ABSTRACT The hypothesis, which is the dynamics control areas of the coal gasification, of random pore model was improved, and the carbon conversion rate （X） and reaction time （t） by a modified random pore model （MRPM） of the high temperature coal char gasification/CO2 conversion reaction was described as X=1-exp[-kt（a＋bkt＋k2t2）]. During 950℃-1 400℃.gasification temperature, the apparent activation energies of the Huainan slow and rapid： pyrolysis coal chars-CO2 gasification were calculated by MRPM which respectively is 121.99 kJ/mol-153.75 kJ/ mol and 88.57 kJ/mol-121.39 kJ/mol. The results show that the effect of MRPM is better than that of random pore model and shrinking core model, it can well reflect the kinetic behavior of char gasification characteristics, and the model is suitable for simulation the gasification of different coal chars. KEY WORDS coal char, elevated temperature, gasification, modified random pore model

关 键 词：高温煤焦 气化 修正随机孔模型 

分 类 号：TQ546[化学工程—煤化学工程] O643.1[理学—物理化学]