Stoichiometry of hydrogen and carbon monoxide chemisorption on alumina- and silica-supported nickel

Journal Article · Wed Oct 01 00:00:00 EDT 1980 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(80)90316-4· OSTI ID:6570887

Bartholomew, C H; Pannell, R B

Adsorption stoichiometries of H/sub 2/ at 298 K and CO at 190 to 298 K on alumina- and silica-supported Ni catalysts prepared by impregnation and precipitation techniques were investigated. In the case of alumina-supported nickel catalysts the metal loading was varied from 0.5 to 23 wt% in order to study the effects of metal-support interactions. Ni/SiO/sub 2/ catalysts were prepared by both impregnation and precipitation techniques to determine effects of catalyst preparation. Room-temperature H/sub 2/ adsorption on alumina- and silica-supported nickel occurs with a stoichiometry of one hydrogen atom per surface nickel atom as determined by chemisorption, x-ray diffraction, and electron microscopy. CO adsorption is considerably more complex, the stoichiometry of which varies with equilibration pressure, temperature, metal crystallite size, and metal loading. Formation of nickel carbonyl and substantial amounts of chemical and physical adsorption of CO on the support provide additional complications.

• Research Organization: Brigham Young Univ., Provo, UT
• OSTI ID: 6570887
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 65:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

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ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
DATA
ELEMENTS
EXPERIMENTAL DATA
GRAPHS
HYDROGEN
INFORMATION
KINETICS
METALS
MINERALS
NICKEL
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TABLES
TRANSITION ELEMENTS