STUDIES OF THE FISCHER-TROPSCH REACTION ON CO(0001)

被引：109

作者：

GEERLINGS, JJC

ZONNEVYLLE, MC

DEGROOT, CPM

机构：

[1] Koninklijke / Shell-Laboratorium, Amsterdam (Shell Research B.V.), 1031 CM Amsterdam

来源：

SURFACE SCIENCE | 1991年 / 241卷 / 03期

关键词：

D O I：

10.1016/0039-6028(91)90090-F

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 Fischer-Tropsch reaction has been studied over Co(0001) in the temperature range between 220 and 300-degrees-C at 1 bar total pressure and an H2:CO ratio of 2:1. It was found that the activation energies for methane, ethane and propane formation are equal, which suggests similar rate determining steps. We propose that alpha-hydrogenation of a C(n)H2n+1 surface species is rate limiting. Olefins are formed via beta-dehydrogenation of the same species. The olefins take part in a consecutive reaction and are finally converted to paraffins. The product distribution was found to follow Schulz-Flory kinetics with a chain growth probability of 0.2 at 250-degrees-C. Post-reaction spectroscopy with EELS and Auger indicated the presence of CO and CH(x) (x = 1,2,3) fragments on the surface.

引用

页码：302 / 314

页数：13

共 23 条

[21] C-H AND H-H ACTIVATION IN TRANSITION-METAL COMPLEXES AND ON SURFACES [J].