Carbon-supported sulfide catalysts
The activities of sulfided Mo C , W C , Co C , Ni C , Co- Mo C , and Ni-W C catalysts for thiophene hydrodesulfurization and butene hydrogenation were studied using a flow microreactor operating at atmospheric pressure. The following parameters were varied: type of carbon support, carbon pretreatmen...
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Published in | Journal of catalysis Vol. 80; no. 2; pp. 386 - 402 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Inc
01.01.1983
|
Online Access | Get full text |
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Summary: | The activities of sulfided
Mo
C
,
W
C
,
Co
C
,
Ni
C
,
Co-
Mo
C
, and
Ni-W
C
catalysts for thiophene hydrodesulfurization and butene hydrogenation were studied using a flow microreactor operating at atmospheric pressure. The following parameters were varied: type of carbon support, carbon pretreatment, catalyst preparation method, and content of active material. The results are compared with those obtained for series of sulfided Mo/γ-Al
2O
3, W/γ-Al
2O
3,
Mo
SiO
2
, and
W
SiO
2
. Some samples, viz.,
Mo
C
,
Co
C
, and
Co-Mo
C
, were also studied by X-ray photoelectron spectroscopy (XPS). The carbon-supported catalysts demonstrated outstanding performance for thiophene hydrodesulfurization. XPS analysis showed the presence of low-valence-state sulfur, e.g., S
− or (S-S)
2−, in
Mo
C
and
Co
C
catalysts with low molybdenum or cobalt content. These sulfurspecies are supposedly connected with the catalytic activity for hydrodesulfurization.
Co
C
and
Ni
C
were found to have a hydrodesulfurization activity which was higher (Co) or the same (Ni) as that measured for
Mo
C
or
W
C
. Therefore Co (Ni) ions in Co
(Ni)-Mo (W)
C
catalysts are considered as promoters for the MoS
2 (WS
2) phase (low
Co
Mo
or
Ni
W
ratios) or as additional active species. |
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ISSN: | 0021-9517 1090-2694 |
DOI: | 10.1016/0021-9517(83)90263-4 |