DEUTERIUM TRACING STUDIES AND MICROKINETIC ANALYSIS OF ETHYLENE HYDROGENATION OVER PLATINUM

被引：41

作者：

GODDARD, SA ^{[1
]}

CORTRIGHT, RD ^{[1
]}

DUMESIC, JA ^{[1
]}

机构：

[1] UNIV WISCONSIN,DEPT CHEM ENGN,MADISON,WI 53706

来源：

JOURNAL OF CATALYSIS | 1992年 / 137卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0021-9517(92)90148-B

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：

Deuterium tracing experiments of ethylene hydrogenation over platinum were conducted at temperatures from 248 to 333 K and D2/C2H4 pressure ratios between 50:75 and 150:25 Torr. Information about the rates of adsorption/de sorption and hydrogenation processes on the surface was extracted by kinetic analysis of the deuterium tracing data combined with results from steady-state kinetic studies and temperature programmed desorption experiments. This analysis suggests that the essential surface chemistry can be described by a Horiuti-Polanyi mechanism that includes competitive and noncompetitive hydrogen adsorption pathways, each modified by a hydrogen activation step. The importance in these analyses of utilizing data from diverse experimental measurements is illustrated. © 1992.

引用

页码：186 / 198

页数：13

共 29 条

[1] TEMPERATURE-PROGRAMMED DESORPTION STUDY OF ETHYLENE ON A CLEAN, A H-COVERED, AND AN O-COVERED PT(111) SURFACE [J].