Deactivation of alumina-supported nickel and ruthenium catalysts by sulfur compounds

Journal Article · Mon Dec 31 23:00:00 EST 1979 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(80)90359-0· OSTI ID:6420413

Wentrcek, P W; McCarty, J G; Ablow, C M; Wise, H

Deactivation of alumina-supported nickel and ruthenium catalysts by sulfur compounds was studied by temperature-programmed desorption, temperature-programmed surface reaction, and in flow experiments of carbon monoxide and hydrogen on a commercial catalyst (G-65) containing 25% nickel on alumina (Ni/Al) and on this catalyst with 1% iridium added (Ni/Ir/Al) in the absence and presence of hydrogen sulfide. The Ni/Ir/Al catalyst adsorbed 30% more CO than Ni/Al, and it desorbed in three temperature peaks, compared with two desorption peaks for Ni/Al. Carbon dioxide and surface carbon were formed during the desorption. On Ni/Al, two types of surface carbon were formed with different reactivities towards hydrogen, and on Ni/Ir/Al only one highly reactive carbon species was detected. In the presence of hydrogen sulfide, adsorption decreased, less carbon was formed on Ni/Ir/Al and none on Ni/Al, and the methanation reaction decayed at a rate which was determined for the two catalysts. The iridium increased the sulfur resistance of the catalyst by a factor of two. An alumina-supported 5% ruthenium catalyst deactivated more rapidly than Ni/Al.

• Research Organization: SRI Int.
• OSTI ID: 6420413
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 61:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADSORPTION
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
DATA
DEACTIVATION
DESORPTION
ELEMENTS
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INFORMATION
IRIDIUM
KINETICS
METALS
METHANATION
NICKEL
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REACTION KINETICS
RUTHENIUM
SORPTION
SULFIDES
SULFUR COMPOUNDS
TEMPERATURE EFFECTS
TRANSITION ELEMENTS