煤泥的二氧化碳气化动力学  

CARBON DIOXIDE GASIFICATION KINETICS OF COAL SLIME

作　　者：陈恒宝[1] 周敏[1] 贺国章[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州硕士221116

出　　处：《煤炭转化》2012年第3期19-22,共4页Coal Conversion

基　　金：国际科技合作计划项目(2010DFA72730);江苏高校优势学科建设工程资助项目

摘　　要：立足于煤泥的生产现状,利用热分析方法,研究了石圪台煤泥和浮选后的精细煤泥在不同的升温速率条件下的二氧化碳气化反应,得到了气化反应的TG/DTG曲线,并计算了气化转化率,考察了浮选对煤泥气化特性的影响.选用Coats-Redfern和Doyle近似式对气化过程进行动力学模拟,求解了气化反应活化能和指前因子.结果表明,煤泥和精细煤泥的活化能均随升温速率的增大而减小;在相同的升温速率下,两者的活化能相差不大;煤泥中含量较高的矿物质和灰分对气化具有催化作用.Based on the present utilization situation of coal slime, this paper investigated the carbon dioxide gasification of Shigetai coal slime and fine coal slime after flotation at different heating rates using thermogravimetric analysis, and by TG/DTG curve of the gasification reaction, calculated the gasification conversion and examined the influence of flotation on coal slime gasification. Coats-Redfern and Doyle approximations were used to simulate the gasification behaviors for seeking activation energy and pre-exponential factor. The result showed that the values of the activation energy and the pre-exponential factor of coal slime and fine coal slime decrease with the increase of heating rate, while both are similar at same heating rate; high levels of minerals and ash in coal slime have catalytic action on the gasification.

关 键 词：气化反应 动力学 煤泥 二氧化碳 

分 类 号：TD849[矿业工程—煤矿开采] O643.12[矿业工程—矿山开采]