A refinement on the notion of type i and II (Co)MoS phases in hydrotreating catalysts

被引：109

作者：

Hensen, EJM ^{[1
]}

de Beer, VHJ ^{[1
]}

van Veen, JAR ^{[1
]}

van Santen, RA ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Schuit Inst Catalysis, NL-5600 MB Eindhoven, Netherlands

来源：

CATALYSIS LETTERS | 2002年 / 84卷 / 1-2期

关键词：

hydrodesulfurization; thiophene; MoS2; CoMoS; XPS; TPR; support interaction;

D O I：

10.1023/A:1021024617582

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 Mo content on thiophene hydrodesulfurization for alumina- and carbon-supported (Co)Mo catalysts is investigated by TPR, XPS and H-2-D-2 equilibration. Activity trends for alumina-supported catalysts are explained by a gradual change of the type I MoS2 active phase from a large to a small number of Mo-O-Al anchors. A pure type II phase without such anchors and a high HDS activity is only obtained employing chelating ligands or a carbon support. At low Mo loading a separate oxysulfidic Mo species in strong interaction with alumina exhibits an unexpectedly high HDS activity, which, however, is difficult to promote by Co.

引用

页码：59 / 67

页数：9

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