COMPETITION BETWEEN ETHYNE, ETHENE AND CARBON-MONOXIDE FOR THE ACTIVE-SITES DURING HYDROGENATION AT TRANSIENT CONDITIONS OVER SUPPORTED METAL-CATALYSTS

被引：25

作者：

CIDER, L

SCHOON, NH

机构：

来源：

APPLIED CATALYSIS | 1991年 / 68卷 / 1-2期

关键词：

CROSS-DESORPTION; CARBON MONOXIDE; ETHYNE; TRANSIENT HYDROGENATION; PALLADIUM ALUMINA; RHODIUM ALUMINA; PLATINUM ALUMINA;

D O I：

10.1016/S0166-9834(00)84102-0

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 influence of carbon monoxide on ethene hydrogenation over Pd/alpha-Al2O3 (Rh/Al2O3, Pt/Al2O3) was found to be temporarily eliminated after a short pulse of ethyne, propadiene or butadiene. These compounds were found to rapidly accelerate the very slow thermal desorption of carbon monoxide, an effect of the same kind as the so-called adsorption-assisted desorption and cross-desorption. The same phenomenon was valid for the reverse process, i.e. the increased desorption of ethyne after a step of carbon monoxide. The activation energy of the increased desorption of carbon monoxide was found to be low.

引用

页码：191 / 205

页数：15

共 27 条

[1] ACTIVITY AND SELECTIVITY OF PD/ALPHA-AL2O3 FOR ETHYNE HYDROGENATION IN A LARGE EXCESS OF ETHENE AND HYDROGEN [J].