摘要
为了考察地下气化过程中干馏和干燥作用对于气体产物组成的影响,以乌兰察布原煤为研究对象,采用大直径固定床反应装置进行了150℃～800℃范围内热解气体的形成与释放研究.结果表明,大粒径褐煤热解在400℃才开始有气体逸出,随着温度的升高气体总产率升高,平均孔径和孔容积呈现先增大后减小的趋势;不同粒度的块状煤有效气体析出规律大致相同,但5cm见方的褐煤呈现气体析出缓慢、产量较大的趋势;在慢速升温和中速升温过程中,5℃/min的升温速率可以明显增加大粒度褐煤热解失重率,提高气体产率.
Coal from Wulanchabu was selected to research the effects of dry distillation on the gaseous products during the coal underground gasification.The pyrolysis experiments were completed in a large diameter fixed bed reactor at 150 ℃-800 ℃.The results show that gas can not release lower than 400 ℃ in large size and the yield rate of total gas increase with the temperature increasing,the average of pore size and pore volume first increased and then decrease.The trends of gaseous of large lump lignite pyrolysis products are similar in different size coal,but there are more slower and large output in 5 cm square coal.During the slow heating and medium-speed heating,the heating speed of 5 ℃/min can significantly increase the weight loss and gas yield.
出处
《煤炭转化》
CAS
CSCD
北大核心
2010年第4期21-25,共5页
Coal Conversion
基金
国家自然科学基金资助项目(50876112)
中央高校科研业务专项基金资助项目(2009QH13)
关键词
粒径
热解
地下气化
size
pyrolysis
coal underground gasification
