ALCL_3和SiCL_4改性HZSM-5沸石上的乙苯乙烯烷基化反应

• 作 者: 武传昌 缪承明 秦关林
• 机 构: 南京大学化学系,南京大学化学系,南京大学化学系 江苏教育学院化学系
• 出 处: 南京大学学报(自然科学版)
• 发表日期: 1992年01期
• 关键词: 烷基化反应 ALCL_3 HZSM-5 SiCL_4 HZSM-5沸石 改性 乙苯 乙苯乙烯烷基化 ALCL 对二乙苯

本文用微型反应器、SEM、XPS、IR-TPD、吸附动力学等手段研究了HZSM-5沸石经 ALCL_3或 SiCL_4蒸气改性前后的乙苯、乙烯烷基化反应的催化性能及其与沸石表面性质间的关系.结果表明,改性会使 HZSM-5沸石的表面 B 酸中心数量减少,强度降低,并造成沸石孔口、孔道阻塞或孔径收缩和孔道阻碍,扩大了二烷基苯异构体间的扩散差别.这些变化是造成乙苯、乙烯烷基化反应活性和选择性变化的重要原因.

In this paper, the catalytic performance of alkylation of ethylbenzene and ethylene with HZSM-5 zeolite by ALCL_3 or SiCL_4 vapor before and after modified by means of microreactor, SEM, XPS, IR-TPD and adsorption kinetics were investigated. The results show that the modification will reduce the number of B acid sites on the surface of HZSM-5 zeolite, decrease the strength, and cause zeolite pore, pore blocking or pore shrinkage and pore blocking, and enlarge the dialkyl benzene isomer Differences between the diffusion of these bodies. These changes are caused by ethylbenzene, ethylene alkylation reaction activity and selectivity of the important reasons.