Metal sulfide catalysts and methods of making same
AssigneeConocoPhillips Company
InventorsMadhu Anand, Brian C. Dunn, Glenn W. Dodwell
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Abstract
Methods and apparatus relate to catalysts and preparation of the catalysts, which are defined by sulfides of a transition metal, such as one of molybdenum, tungsten, and vanadium. Precursors for the catalysts include a metal ion source compound, such as molybdenum trioxide, and a sulfide ion source compound, such as thioacetamide. Once the precursors are dissolved if solid and combined in a mixture, homogenous precipitation from the mixture forms the catalysts. Exemplary uses of the catalysts include packing for a methanation reactor that converts carbon monoxide and hydrogen into methane.
Claims20
A method comprising the steps of:
- preparing a mixture comprising metal ions from a salt of one of molybdenum, tungsten and vanadium and a source of sulfur ions;
- and
- forming metal sulfide by subjecting the mixture to conditions that permit homogenous precipitation of metal sulfide particles.
A method comprising the steps of:
- dissolving molybdenum trioxide and thioacetamide to provide a mixture;
- generating a precipitate within the mixture by heating the mixture to cause homogenous precipitation;
- and
- collecting the precipitate, wherein the precipitate that is collected provides molybdenum disulfide catalyst.
A molybdenum disulfide catalyst, comprising:
- a solid composition containing molybdenum disulfide and prepared to achieve at least 80% carbon monoxide conversion in a methanation reaction, wherein conditions of the methanation reaction are defined by a 455° C. reactor temperature and 3171 kilopascal reactor pressure with a gas hourly space velocity of 2400 hr−1 and feed gas flow of 37% hydrogen, 34% carbon monoxide, 1% hydrogen sulfide and 28% nitrogen.
Dependencies are inferred from the claim text.