平顶山瘦煤煤焦固定床二氧化碳催化气化动力学研究  

Study on Kinetics of Catalytic Carbon Dioxide Gasification of Pingdingshan Lean Coal Char in Fixed Bed

作　　者：赵志刚[1,2] 余可 查荣轩 解乐乐 张小勇 凌强[1] 崔平[1] ZHAO Zhigang;YU Ke;ZHA Rongxuan;XIE Lele;ZHANG Xiaoyong;LING Qiang;CUI Ping(School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan243002, China;Anhui Keda Clean Energy Company Limited, 243071 Maanshan,China)

机构地区：[1]安徽工业大学化学与化工学院,安徽马鞍山博士副教授243002 [2]安徽科达洁能股份有限公司,安徽马鞍山博士后243071

出　　处：《煤炭转化》2019年第3期34-39,共6页Coal Conversion

基　　金：国家自然科学基金资助项目(21506001和21776002);安徽省教育厅高校自然科学研究项目(KJ2016A809和KJ2017A056)

摘　　要：以K_2CO_3负载后的平顶山瘦煤煤焦为研究对象,在内径为20mm的固定床反应器中对其二氧化碳催化气化反应动力学进行了研究。考察了K_2CO_3的负载对平顶山瘦煤黏结性的影响,确定了消除气化反应内外扩散影响的实验条件。在750℃～900℃范围内,测定了平顶山瘦煤煤焦的碳转化率与时间的关系。采用均相模型和缩核模型对实验结果进行拟合,得到了焦样二氧化碳催化气化反应的反应速率常数、反应活化能和指前因子。结果表明,K_2CO_3对平顶山瘦煤具有显著的破黏和催化气化效果。利用均相模型和缩核模型均能对平顶山瘦煤煤焦的二氧化碳催化气化反应动力学起到较好的预测效果。The catalytic carbon dioxide gasification kinetics of Pingdingshan lean coal char loading with K2CO3 was studied in a fixed bed with 20mm of inner diameter. The influence of K2CO3 on caking properties of Pingdingshan lean coal was investigated and the reaction conditions of eliminating both internal and external diffusion effects were determined. The relationship between carbon conversion and reaction time of Pingdingshan lean coal char from 750 ℃ to 900 ℃ was measured. The reaction rate constant, reaction activation energy and pre-exponential factor of catalytic carbon dioxide gasification reaction of coal char were obtained using homogeneous model and shrinkage core model. The results show that K 2CO 3 has significant effects of caking destruction and catalytic gasification on Pingdingshan lean coal. Both the homogeneous model and the shrinking core model can accurately estimate the kinetics of the catalytic carbon dioxide gasification of the Pingdingshan lean coal char.

关 键 词：固定床 催化气化 气化反应动力学 碳转化率 均相模型 

分 类 号：TQ536[化学工程—煤化学工程]