ISSN:
1588-2837
Keywords:
H2S dissociation
;
bimetallic Ru-Mo sulfide
;
synergism
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract A γ-alumina-supported bimetallic Ru-Mo sulfide catalyst preparedvia precipitation from homogeneous solution (PFHS) has been used to effect the abstraction of H2 from H2S. The decomposition reaction was also carried out over Al2O3-supported RuS2 and MoS2 catalysts synthesizedvia PFHS. The performance of bimetallic system exceeded (ca. 40%) the simple additive activities of the constituent monometallic sulfide catalysts and about 2–3 times the individual activities of the monometallic sulfide samples, suggesting chemical synergism between Ru and Mo in the Ru-Mo catalyst. In particular, comparison with other catalysts in the literature showed that specimens preparedvia PFHS exhibited better activities than those from direct sulfidation of the metal oxide. Kinetic study over the Ru-Mo bimetallic sulfide catalyst in a quartz micro-reactor at 110 kPa and between 783–973 K revealed a 1st order dependency on H2S partial pressure and an activation energy of about 92 kJ mol−1. The irreversible adsorption of H2S on a coordinatively unsaturated site is thought to be the rate-limiting step.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02475713
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