Support and crystallite size effects in CO hydrogenation on nickel

Journal Article · Wed Oct 01 04:00:00 EDT 1980 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(80)90311-5· OSTI ID:6565586

Bartholomew, C H; Pannell, R B; Butler, J L

Adsorption and CO hydrogenation activity/selectivity properties of well-defined Ni/SiO/sub 2/, Ni/Al/sub 2/O/sub 3/, and Ni/TiO/sub 2/ catalysts representing wide ranges of dispersion and nickel concentration were investigated. CO and H/sub 2/ adsorption uptakes were determined for all of the catalysts. The extent of reduction to the metal was also determined for all catalysts by oxygen titration or nickel carbonyl extraction. Specific activities for CO/H/sub 2/ synthesis were measured for each of the catalysts at 500 to 550 K and 140 kPa. Effects of strong metal-support interactions are evident in Ni/TiO/sub 2/, in well-dispersed Ni/Al/sub 2/O/sub 3/, and to a lesser extent in very well-dispersed Ni/SiO/sub 2/ from (i) changes in the nature and stoichiometry of CO and H/sub 2/ adsorption and (ii) significant changes in activity and selectivity properties for CO/H/sub 2/ synthesis with changes in metal dispersion, support, preparation technique, and catalyst pretreatment. Both CO/H adsorption ratio and selectivity to C/sub 2+/ hydrocarbons increase with increasing metal dispersion in Ni/SiO/sub 2/ and Ni/Al/sub 2/O/sub 3/ systems, suggesting that metal-support interactions affect selectivity by changing the relative abundance of adsorbed CO and H/sub 2/ during reaction.

• Research Organization: Brigham Young Univ., Provo, UT
• OSTI ID: 6565586
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 65:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ELEMENTS
EXPERIMENTAL DATA
GRAPHS
HYDROGEN
INFORMATION
KINETICS
METALS
METHANATION
MINERALS
NICKEL
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
REACTION KINETICS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SIZE
SORPTION
TABLES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS