CrHZSM-5 zeolites - Highly efficient catalysts for catalytic cracking of isobutane to produce light olefins

被引：82

作者：

Lu, JY ^{[1
]}

Zhao, Z ^{[1
]}

Xu, CM ^{[1
]}

Duan, AJ ^{[1
]}

Zhang, P ^{[1
]}

机构：

[1] China Univ Petr, State Key Lab Heavy Oil Proc, Fac Chem Sci & Engn, Beijing 102249, Peoples R China

来源：

CATALYSIS LETTERS | 2006年 / 109卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

CrHZSM-5; zeolite; catalytic cracking; isobutane; light olefins;

D O I：

10.1007/s10562-006-0058-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The CrHZSM-5 catalysts with trace amount of Cr were firstly used for catalytic cracking of isobutane, and the effect of Cr-loading on the catalytic performances of CrHZSM-5 catalysts for the cracking of isobutane was also studied. The results suggested that when the loading of Cr in the CrHZSM-5 catalysts was less than 0.038 mmol/g Cr, especially at Cr loading of 0.004 mmol/g, both the reactivity of isobutane cracking and the selectivity to light olefins of CrHZSM-5 samples were greatly enhanced compared with the unpromoted HZSM-5, and very high yields of olefins(C-2+C-3) and ethylene were obtained. For instance, the yield of olefins(C-2+C-3) and ethylene reached 56.1% and 30.8%, respectively, at 625 degrees C when 0.004 mmol/g Cr was loaded on HZSM-5 sample.

引用

页码：65 / 70

页数：6

共 23 条

[1] Catalytic performance of chromium oxide supported on Al2O3 in oxidative dehydrogenation of isobutane to isobutene [J].