浑源煤焦的CO2气化特性研究

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 main焦与50 main焦的气化活性无明显差异,而2h焦则表现出了随保温时间延长,气化活性降低的趋势；0.05～...

Study of CO2 gasification characteristics on Hunyuan coal char

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.