INFLUENCE OF THE SUPPORT ON THE ACTIVITY AND SELECTIVITY OF HIGH DISPERSION FE CATALYSTS IN THE FISCHER-TROPSCH REACTION

被引：48

作者：

CAGNOLI, MV ^{[1
]}

MARCHETTI, SG ^{[1
]}

GALLEGOS, NG ^{[1
]}

ALVAREZ, AM ^{[1
]}

MERCADER, RC ^{[1
]}

YERAMIAN, AA ^{[1
]}

机构：

[1] FAC CIENCIAS EXACTAS LA PLATA,DEPT FIS,LA PLATA,ARGENTINA

来源：

JOURNAL OF CATALYSIS | 1990年 / 123卷 / 01期

关键词：

D O I：

10.1016/0021-9517(90)90154-C

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：

In order to study the influence of the support on high dispersion catalysts used for the CO hydrogenation reaction, two catalysts, Fe/SiO2 and Fe/A2O3, were prepared by the dry impregnation method. Selective chemisorption of CO, volumetric oxidation, and Mössbauer spectroscopy were used to determine the Fe species present as well as the metallic crystal size, the degree of dispersion, and the reduction percentage. The presence of small Fen crystallites with high dispersion was determined in both catalysts. Reaction rates were measured in a differential reactor and significant differences, about one order of magnitude less for the Al203 than for the SiO2 supported catalysts, were found in the methane turnover frequencies. They are attributed to the interaction between the metal and the supports. The selectivity difference is also discussed in connection with distinct surface properties. © 1990.

引用

页码：21 / 30

页数：10

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