n-Butane hydroisomerization over Pd/HZSM-5 catalysts.: Palladium loaded by ion exchange

被引：16

作者：

Cañizares, P ^{[1
]}

de Lucas, A ^{[1
]}

Dorado, F ^{[1
]}

Aguirre, J ^{[1
]}

机构：

[1] Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13004, Spain

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2001年 / 42卷 / 2-3期

关键词：

HZSM-5; palladium; metal on zeolites; ion exchange; hydroisomerization;

D O I：

10.1016/S1387-1811(00)00327-9

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The influence of the preparation method, the nature of the precursor compound and acid treatment on hydroisomerization of It-butane over bifunctional Pd/HZSM-5 catalysts was investigated to obtain active and highly selective catalysts. Temperature-programmed desorption of ammonia, atomic absorption spectroscopy, chemisorption, temperature-programmed reduction and transmission electron microscopy techniques were used to characterize the catalysts. Pd(NO3)(2) was selected as metal precursor, because calcination of this compound can be carried out in a furnace under static air atmosphere without needing careful temperature control. A catalyst with a palladium loading of 0.53 wt.% exhibited good isomerization performance, which was further improved by severe acid treatment, as a higher strong acid-site density was obtained. The selected catalyst led to a total conversion of 35.3 mol% and a high selectivity of 78%. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：245 / 254

页数：10

共 29 条

[1] HYDROISOMERIZATION AND HYDROCRACKING OF N-ALKANES .2. N-HEPTANE TRANSFORMATION ON A PT-DEALUMINATED Y-ZEOLITE - COMPARISON WITH A PT-Y-ZEOLITE [J].