Studies on molybdena-alumina catalysts XII. MoS2 surface coverage from CO2 adsorption

Zmierczak, W.; Qader, Q.; Massoth, F.E.

doi:10.1016/0021-9517(87)90211-9

Cited by 35 publications

(1 citation statement)

References 12 publications

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“…The adsorption of NO is also commonly used for MoS 2 titration (Topsøe and Topsøe, 1983;Miciukiewicz et al, 1987), but again there is some concern that this process may be corrosive (Prins et al, 1989). CO 2 , on the other hand, does not chemisorb on MoS 2 (Zmierczak et al, 1987). Indeed, since CO 2 does adsorb on Al 2 O 3 , one method for measuring the fraction of the support covered by the sulfide uses the difference between the uptake on the catalyst and the uptake on the support only.…”

Section: Experimental Methodsmentioning

confidence: 99%

Microkinetics of Water−Gas Shift over Sulfided Mo/Al₂O₃Catalysts

Lund

1996

Ind. Eng. Chem. Res.

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A microkinetic model was developed to explain the catalysis of the water−gas shift reaction by sulfided, alumina-supported molybdenum. In this model, the reaction takes place through a regenerative (reduction−oxidation) scheme wherein the catalyst surface is alternately oxidized by water and then reduced by carbon monoxide. The surface of the catalyst is equilibrated with gas-phase H2S under all reaction conditions studied. Coverages predicted by the model are consistent with the adsorption behavior of molybdenum sulfide catalysts. Simulations indicate that the effects of steam and H2S levels are closely related. A maximum in CO conversion with increasing steam level may only occur at certain H2S levels, and the ordering of CO conversion with increasing H2S levels may invert as the steam level is changed.

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Section: Experimental Methodsmentioning

confidence: 99%