A comparative evaluation of cobalt chromium oxide, cobalt manganese oxide, cobalt manganese oxide, and copper manganese oxide as catalysts for the water-gas shift reaction

Journal Article · Thu Oct 01 00:00:00 EDT 1992 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(92)90168-H· OSTI ID:7004741

Hutchings, G J ^[1]; Copperthwaite, R G; Gottschalk, F M; Hunter, R; Mellor, J; Orchard, S W; Sangiorgio, T ^[2]

---

1. Univ. of Liverpool (United Kingdom)
2. Univ. of the Witwatersrand, Johannesburg (South Africa)

Cobalt chromium oxide, cobalt manganese oxide, and copper manganese oxide have been compared as catalysts for the water-gas shift reaction. Cobalt chromium oxide and cobalt manganese oxide catalysts can give both high activity and long lifetimes for this reaction. Cobalt chromium oxide catalysts display higher activity compared to the other catalyst systems and this is shown that both the cobalt chromium oxide and the cobalt manganese oxide catalysts are not sensitive to the presence of up to 240 ppm feedstock sulphur impurities (H{sub 2}S and COS) and high catalyst activity can be maintained either in the presence or in the absence of feedstock sulphur. The copper manganese oxide catalysts are demonstrated to be particularly sensitive to feedstock sulphur, being significantly poisoned at levels as low as 1 ppm H{sub 2}S. An investigation of the mechanism of the water-gas shift mechanism over the three catalyst systems is also described using both kinetic and model reagent studies. Based on these studies, a mechanism is proposed for the cobalt- and copper-containing catalyst systems involving the formation of a surface formate intermediate.

• OSTI ID: 7004741
• Journal Information: Journal of Catalysis; (United States), Vol. 137:2; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
01 COAL, LIGNITE, AND PEAT
CHROMIUM OXIDES
CATALYTIC EFFECTS
COBALT OXIDES
COPPER OXIDES
MANGANESE OXIDES
WATER GAS PROCESSES
CATALYSTS
AMMONIA
CARBON OXYSULFIDE
CHEMICAL REACTION KINETICS
COMPARATIVE EVALUATIONS
FORMATES
HYDROGEN SULFIDES
METHANOL
POISONING
REACTION INTERMEDIATES
SERVICE LIFE
SULFUR
SURFACE AREA
SYNTHESIS
ALCOHOLS
CARBON COMPOUNDS
CARBOXYLIC ACID SALTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM COMPOUNDS
COBALT COMPOUNDS
COPPER COMPOUNDS
ELEMENTS
EVALUATION
HYDRIDES
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
KINETICS
LIFETIME
MANGANESE COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
080104* - Hydrogen- Production- Water Gas Processes
010408 - Coal
Lignite
& Peat- C1 Processes- (1987-)