Influence of the surface structure on the kinetics of ethane hydrogenolysis over Ni/SiO/sub 2/ catalyst

Journal Article · Sat Dec 01 04:00:00 EST 1979 · J. Catal.; (United States)

OSTI ID:6363693

Martin, G A

Hydrogen adsorption and ethane hydrogenolysis kinetics were measured over a wide range of temperatures and pressures over six catalysts containing 4.5-45% nickel on silica with surface average diameters of 2.5-22 nm. The reaction rate, previously reported as depending on particle size, was independent of pressure and temperature. The previously developed relationship between reaction rate and hydrogen coverage was not valid for the less active catalysts as apparently hydrogen adsorbed on sites that were inactive in hydrogenolysis, probably on (111) planes. The correspondence of ethane hydrogenolysis and hydrogen adsorption on the more active samples indicated that all active sites were equivalent, i.e., the reaction was structure insensitive if the (111) planes were disregarded.

• Research Organization: C.N.R.S., Inst. Rech. Catal., Villeurbanne
• OSTI ID: 6363693
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 60:3; 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
ALKANES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CRYSTAL STRUCTURE
DATA
ELEMENTS
ETHANE
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGEN
INFORMATION
KINETICS
METALS
MINERALS
NICKEL
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PRESSURE EFFECTS
QUANTITY RATIO
REACTION KINETICS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SIZE
SORPTION
SURFACES
TEMPERATURE EFFECTS
TRANSITION ELEMENTS