改性对ZSM-5分子筛芳构化性能的影响  

Effect of Modification on Aromatization Performance of ZSM-5 Molecular Sieve

作　　者：高媛[1] 白英芝[1] 施岩[1] 赵立祥[1] 柳璐[1] 

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《化学与粘合》2009年第2期54-58,共5页Chemistry and Adhesion

摘　　要：ZSM-5分子筛由于具有独特的择形性、良好的水热稳定性、耐酸和抗积碳性能,因而被广泛应用于芳构化过程。综述了国内外对ZSM-5分子筛芳构化催化剂的改性方法。Zn的加入不仅能促进低碳烃的芳构化反应,而且能增强催化剂的抗积碳性能。随着磷的引入,液体收率增加,芳烃含量增加。Ga离子交换改性的ZSM-5对低碳烃类的芳构化有明显的催化作用。P-Zn/HZSM-5催化剂不仅表现出较高的初活性,而且具有良好的稳定性。经水热处理的ZSM-5分子筛具有良好的芳构化稳定性。纳米HZSM-5沸石催化剂具有很强的烃类转化能力,烃类通过芳构化、异构化和烷基化等反应转化为高辛烷值的异构烷烃和芳烃。Because of the unique shape-selective, good hydrothermal stability, characteristics of anti-acid and anti-carbon deposition, ZSM-5 molecular sieve is widely used in aromatization catalytic process. The main modification methods of ZSM-5 molecular sieve aromatization catalyst at home and abroad were summarized. The addition of Zn not only promoted low-carbon hydrocarbons aromatization reaction, but also enhanced the anti-carbon deposition performance of catalyst. With the addition of phosphorus, liquid yield and aromatics content increased. ZSM-5 had obvious catalysis on the low-carbon hydrocarbons aromatization which was modified by Ga ion exchange. P-Zn/HZSM-5 showed higher initial activity and good stability. After hydrothermal treatment, HZSM-5 molecular sieve had a good stability of aromatization. Nano-HZSM-5 zeolite catalyst had a strong hydrocarbon conversion property, through the aromatization, isomerization, and alkylation reaction, hydrocarbon converted into isohydrocarbon and aromatics which had a high octane value.

关 键 词：ZSM-5改性 芳构化 锌 磷 镍 镓 纳米 

分 类 号：TQ424.25[化学工程]