Al_2O_3-ZnO粘结剂对Mo/ZSM-5催化剂甲烷无氧芳构化反应性能的影响  

Methane dehydroaromatization in the absence of oxygen over extruded Mo/ZSM-5 with Al_2O_3-ZnO

作　　者：任冬梅[1] 赛福生 赵岩[1] 夏云生[1] 包德才[1] 王祥生[2] 

机构地区：[1]渤海大学化学化工学院,辽宁锦州121013 [2]大连理工大学化工学院,辽宁大连116024

出　　处：《化学研究与应用》2017年第10期1492-1497,共6页Chemical Research and Application

基　　金：国家自然科学基金项目(21676028);渤海大学博士启动基金(BSQD201416);渤海大学博士启动基金(BSQD201417)

摘　　要：考察了Al_2O_3-Zn O粘结剂挤条成型的Mo/ZSM-5催化剂的甲烷无氧芳构化反应性能。采用X射线光电子能谱、紫外共振拉曼光谱及固体核磁共振等方法对催化剂进行了表征。结果表明,m(Al_2O_3)∶m(ZnO)=1∶1时成型催化剂的径向强度为71N/cm,反应条件下所生成的ZnAl_2O_4使Mo/ZSM-5催化剂母体的扩散性及Mo物种的氧化还原能力得到较好的保持,从而使成型催化剂的芳烃生成量达到催化剂母体的90%。The extruded Mo/ZSM-5 catalysts with Al2O3-ZnO as supports were prepared.XPS,27 Al NMR were employed to characterize the catalysts.The methane dehydroaromatization in the absence of oxygen over the catalysts were investigated in a fixed-bed reactor.The results showed that the mechanical strength of the molding catalysts was about 71 N/cm,and the diffusibility of catalyst and reducibility of Mo species was kept well due to the formation of ZnAl2O4 under the reaction conditions.The activity of the extruded catalyst with Al2O3-ZnO showed 90% of that of the base catalyst.

关 键 词：甲烷 芳构化 ZSM-5分子筛 挤条成型催化剂 

分 类 号：O643[理学—物理化学]