流化床中甲醇制低碳烯烃反应-再生过程研究  

Reaction-Regeneration Process of Methanol-to-Light Olefins in Fluidized Bed

作　　者：王彪[1] 李涛[1] 应卫勇[1] 房鼎业[1] 孙启文 

机构地区：[1]华东理工大学大型工业反应器工程教育部工程研究中心化学工程联合国家重点实验室,上海200237 [2]煤液化及煤化工国家重点实验室,上海201203

出　　处：《高校化学工程学报》2011年第2期236-241,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家科技支撑计划项目(2006BAE02b02)

摘　　要：在密相段为φ30 mm×320 mm及稀相段为φ68 mm×160 mm的流化床反应器中,采用SAPO-34为主要活性成分的流化床催化剂,研究了反应温度、空速(WHSV)、进料组成随反应时间对低碳烯烃(乙烯+丙烯)选择性及甲醇转化率的影响;同时在流化床中,对失活催化剂进行再生实验,考察了再生催化剂的催化性能,并用XRD,SEM,BET,NH3-TPD,TGA等手段对催化剂进行表征。实验结果表明,在450℃,空速为3 h-1,精甲醇(99.5%(mol)进料时,低碳烯烃选择性高达92.06%;再生催化剂的催化性能良好,微观结构没有发生明显变化,可以循环使用。TGA表征结果表明,600℃是较适宜的再生温度。In order to study the process of methanol-to-light olefins,the SAPO-34 was used as the main catalytic active component in a fluidized bed reactor with dimensions of φ30 mm×320 mm for its dense section and φ68 mm×160 mm for its thin section.The effects of reaction temperature,WHSV and feed composition on ethylene,propylene selectivity and methanol conversion were investigated;at the same time,the deactivated catalyst after use was regenerated in the fluidized bed and the catalytic performances of the regenerated catalyst was investigated too.The results indicate that,under optimal operation conditions for proceeding methanol-to-olefins： i.e.temperature of 450℃,WHSV of 3 h 1 and feed methanol composition of 99.5%（mol）,the total selectivity of ethylene and propylene can reach 92.06%.The catalyst SAPO-34 and the regenerated catalyst were characterized by means of XRD,SEM,BET,NH3-TDP and TGA,respectively.It was found that,after regeneration,the microstructure and the catalytic performance of the regenerated catalyst has no evident change,and it can be used repeatedly.The TGA characterization indicates that the 600℃ is the optimal regeneration temperature.

关 键 词：流化床 甲醇制烯烃 SAPO-34 反应-再生过程 

分 类 号：TQ426.63[化学工程] TQ203.2