燃料化学学报2016，Vol.44Issue(12)：1416-1421,6.
煤焦CO2气化反应动力学及内扩散对气化过程的影响分析
Reaction kinetics of coal char gasification with CO2 and the effect of internal diffusion on the gasification
摘要
Abstract
The effects of temperature (850-1 150℃) and particle size (<60, 505, 950, 1 515 and 2 000μm) on the gasification of Shenmu coal char with CO2 were investigated by using thermogravimetric apparatus ( TGA) under atmospheric pressure. Three kinetic models of volumetric, shrinking core and random pore were applied to validate the experimental results, which illustrates that the random pore model can accurately predict the conversion rate for coal char gasification. Thiele modulus and effectiveness factor were determined on the basis of the intrinsic kinetic rate at 850-1 000℃;a comparison between calculated and experimental effective factors suggests that the calculated effective factor can give a quantitative estimation of the effect of internal diffusion on the initial stage of gasification, but cannot describe the whole gasification process.关键词
气化/煤焦/随机孔模型/内扩散/效率因子Key words
gasification/coal char/random pore model/intra-particle diffusion/effective factor分类
化学工程引用本文复制引用
李位位,黄戒介,王志青,段会文,李俊国,房倚天..煤焦CO2气化反应动力学及内扩散对气化过程的影响分析[J].燃料化学学报,2016,44(12):1416-1421,6.基金项目
The project was supported by the National Natural Science Foundation of China (21506242) and Strategic Priority Research Program of the Chinese Academy of Sciences (XDA07050100).国家自然科学基金(21506242)和中国科学院战略性先导科技专项(XDA07050100)资助 （21506242）
