EFFECT OF THE ADDITION OF ALKALI-METALS ON THE METALLIC PHASE OF PT/AL2O3 CATALYSTS

被引：25

作者：

DEMIGUEL, SR ^{[1
]}

CASTRO, AA ^{[1
]}

SCELZA, OA ^{[1
]}

SORIA, J ^{[1
]}

机构：

[1] INST CATALISIS & PETROLEOQUIM,E-28049 MADRID,SPAIN

来源：

CATALYSIS LETTERS | 1995年 / 32卷 / 3-4期

关键词：

SUPPORTED METALLIC CATALYSTS FOR PARAFFINS DEHYDROGENATION; EFFECT OF ALKALI METALS ADDITION; CHARACTERIZATION OF CATALYSTS;

D O I：

10.1007/BF00813222

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 effect of the addition of alkali metals to Pt/Al2O3 catalysts for dehydrogenation of paraffins was studied. Results can be interpreted in terms of different effects. Thus, the addition of alkali metals produces a poisoning of the acid sites of the alumina support and a modification of the characteristics of the metallic phase. The latter effect involves not only an increase of the Pt particles size, but also an electronic modification of the metallic phase. These two effects are more marked with alkali metals with higher ionic radius, such as K.

引用

页码：281 / 291

页数：11

共 20 条

[1] QUANTITATIVE INFRARED-SPECTROSCOPY OF CO ADSORBED ON PT/SIO2 PREPARATIONS WITH DIFFERENT METAL-PARTICLE SIZES [J].