浑源煤焦的CO_2气化特性研究  

Study of CO_2 gasification characteristics on Hunyuan coal char

作　　者：陈鸿伟[1] 吴亮[1] 高松[1] 韩亮[1] 索新良[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2011年第5期105-108,共4页Journal of North China Electric Power University：Natural Science Edition

摘　　要：在750～950℃范围内,用等温气化的方法研究了热解温度、热解时间、CO2分压、气化温度等对浑源煤焦气化反应特性的影响。结果表明,浑源煤焦在850℃时的气化活性较好;随着制焦温度的提高,气化活性下降;30 min焦与50 min焦的气化活性无明显差异,而2 h焦则表现出了随保温时间延长,气化活性降低的趋势;0.05～0.1 MPa范围内,煤焦的气化反应性随CO2分压的提高而提高;半衰期法计算的气化反应活化能为126.24 kJ/mol,分布活化能模型更加具体地反映了煤焦在不同反应阶段反应活性的变化规律。The reaction characteristics of Hunyuan coal chars with CO2 were investigated by means of isothermal gasification under different temperature from 750 ℃-950 ℃. The pyrolysis temperature, holding time, CO2 partial pressure and gasification temperature were analyzed for the effects on gasification characteristics. Hunyuan coal char shows good performance at the gasification temperature of 850 ℃. The gasification reaction activity decreases with gasification temperature. There is no remarkable difference between the 30 min char and the 50 min char, but there is a decrease in the reaction of 2 h char. The gasification reaction activity improves with the increase of CO2 partial pressure from 0.05 -0. 1 MPa. The activation energy is 126. 24 kJ/mol using half-time method, and the distributed activated energy model （DAEM） concretely describes the change of activation energy at different part of the reaction.

关 键 词：等温气化 气化活性 煤焦 CO2气化 活化能 

分 类 号：TQ541[化学工程—煤化学工程]