Characterization of reduced natural garnierite and its catalytic activity for carbon monoxide hydrogenation

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

DOI:https://doi.org/10.1016/0021-9517(80)90500-X· OSTI ID:6872291

Jacobs, P A ^[1]; Nijs, H H; Poncelet, G

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1. Katholieke Universiteit, Leuven, Belgium

Natural garnierite, a nickel-containing mineral from New Caledonia, was reduced in hydrogen. The mineral and its reduced forms were characterized by x-ray diffraction electron microscopy, and microprobe analysis. The reduction was followed volumetrically and the Ni/sup 0/ phase characterized by H/sub 2/ chemisorption. The catalytic activity of this mineral was determined in the hydrogenation reaction of carbon monoxide. Experiments were done in typical methanation and so-called Fischer-Tropsch conditions. The mineral consists of a mixture of a 10-A phase (talc-like fluffy particles) and a 7-A serpentine-like phase (fibers). The major amount of nickel is associated with the talc phase. Minor amounts are in the serpentine fibers and possibly substituted in the lattice of the minerals. Qualitative evidence for a redispersion of Ni in the serpentine fibers is advanced. At the moment this occurs, the turnover numbers of CO disappearance are optimum. Compared to other supports, they are considerably lower. The product distribution is within C/sub 1/-C/sub 4/ and follows closely a Schulz-Flory distribution.

• OSTI ID: 6872291
• Journal Information: J. Catal.; (United States), Vol. 64:2
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
CARBON MONOXIDE
METHANATION
METHANE
CHEMICAL PREPARATION
NICKEL
CATALYTIC EFFECTS
CATALYSTS
CRYSTAL STRUCTURE
EXPERIMENTAL DATA
MINERALS
NICKEL COMPOUNDS
REACTION KINETICS
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ELEMENTS
HYDROCARBONS
INFORMATION
KINETICS
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
090121* - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989)