Catalytic properties of carbon-supported ruthenium catalysts for n-hexane conversion

被引：25

作者：

Guerrero-Ruiz, A

Bachiller-Baeza, B

Rodriguez-Ramos, I

机构：

[1] CSIC, Inst Catalisis & Petroleoquim, Madrid 28049, Spain

[2] Univ Nacl Educ Distancia, Dept Quim Inorgan & Tecn, Madrid 28040, Spain

来源：

APPLIED CATALYSIS A-GENERAL | 1998年 / 173卷 / 02期

关键词：

CO adsorption microcalorimetry; n-hexane conversion; Ru catalysts; graphite support; activated-carbon support; alumina support; silica support;

D O I：

10.1016/S0926-860X(98)00181-1

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 support (graphite, activated carbon, silica and alumina) has been investigated using the conversion of n-hexane as model reaction. The catalysts were characterized by H-2 adsorption and transmission electron microscopy. Also, the CO adsorption was studied by microcalorimetry. The higher initial heat of CO adsorption observed on ruthenium/graphite indicates an enhanced electron density of the ruthenium particles caused by electron transfer from the graphite. The catalytic results show that ruthenium particles with an increased electron density have a higher activity for the n-hexane conversion accompanied by a preference for hydrogenolysis reaction, with the hydrogenolysis pattern corresponding to a multiple fragmentation. The higher resistance of ruthenium/graphite catalysts to deactivation by carbonaceous deposits was also observed. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：231 / 238

页数：8

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