右玉元堡煤煤焦-水蒸气气化规律研究  

Steam Gasification Law of Youyuyuanbao Coal Char

作　　者：张尚军[1] 陈钢 马栋[1] 刘淑琴[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]山西省国新能源发展集团有限公司,太原030006

出　　处：《煤炭技术》2014年第9期255-258,共4页Coal Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2011AA050105);教育部新世纪人才支持计划资助项目(NCET-10-0773);中央高校科研业务费专项基金资助项目(2009QH13)

摘　　要：煤焦-水蒸气气化是鲁奇加压气化的重要工艺过程,水蒸气气化特性对于确定气氧比及预测水蒸气分解率具有重要意义。以右玉元堡长焰煤为研究对象,采用自制立式管式炉在800-1 100℃范围内进行了块煤煤焦水蒸气气化实验,比较了不同热解终温煤焦样品的比表面积及孔径分布特征,并利用气相色谱对不同时刻的煤气组分进行了检测。研究结果表明,煤焦内孔隙主要为2-10 nm的中孔,随热解终温的升高煤焦的比表面积降低。依据煤焦的二氧化碳反应性,以不同温度下水蒸气的还原率β作为评价煤焦-水蒸气气化反应性的指标,低温时温度对水蒸气反应性影响较大,温度由800℃升至900℃,β增大22.74%。Char-steam reaction is key to Lurgi pressurized gasification process and the gasification characteristics is the theoretical basis for the determination of ratio of steam to oxygen and the prediction of steam decomposition rate.Char-steam gasification experiment was conducted in large-scale vertical furnace with the temperature ranging from 800 ℃ to 1 100 ℃ to obtain the gas composition by GC.The pore structure of char at different temperature was analyzed by BET nitrogen adsorption method.The results demonstrated that most pores in the char were mesopores ranging from 2nm to 10 nm and the specific surface area decreased with the increment of char-making temperature.Reduction rate of steam–β is defined to evaluate the reactivity of char- steam gasification,from which it can be inferred that an obvious increment can be found when temperature rises from 800 ℃ to 900 ℃,β increased 22.74%.

关 键 词：水蒸气气化 煤气组分 水蒸气还原率 

分 类 号：TQ546.2[化学工程—煤化学工程]