Methanation catalyst recovery
Shell Oil Co. has developed a new system to recover the catalyst used for methanation processes in solids or liquids gasification. Methane is continuously produced by contacting a sulfur-containing gaseous reactant mixture (hydrogen, carbon monoxide and/or carbon dioxide) in a reaction zone maintained at temperatures above about 932/sup 0/F (500/sup 0/C) with a molten-metal salt-based catalyst system. This system consists of a molten-metal salt carrier selected from the class consisting of the halides of zinc and cadmium, and their mixtures, melting below 1832/sup 0/F (1000/sup 0/C). Dispersed within the molten salt are one or more catalytically active metals selected from the group consisting of iron, molybdenum, manganese, nickel, cobalt, zinc, titanium, silver, copper, and thorium in the form of finely divided elemental metals, metal oxides, and/or metal carbides. A gaseous product mixture is formed and a portion of the molten-metal salt halide is converted to a metal sulfide (a sulfide of the metal salt) to form a metal-salt mixture. The recovery process comprises separating the metal sulfide, contacting the sulfide with a hydrogen halide at a reduced temperature, and recycling the resultant molten-metal salt halide to the methanation reactor.
- Assignee:
- Shell Oil Co.
- Patent Number(s):
- US 4006177
- OSTI ID:
- 6615186
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CATALYSTS
RECOVERY
METHANATION
CADMIUM HALIDES
CARBIDES
COBALT
COPPER
IRON
MANGANESE
MOLYBDENUM
NICKEL
OXIDES
SILVER
THORIUM
TITANIUM
ZINC
ZINC HALIDES
ACTINIDES
CADMIUM COMPOUNDS
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
METALS
OXYGEN COMPOUNDS
REFRACTORY METALS
TRANSITION ELEMENTS
ZINC COMPOUNDS
090121* - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989)