Cyclic process for producing methane with catalyst regeneration

Patent · Tue Dec 30 00:00:00 EST 1980

OSTI ID:6794310

Frost, A C; Risch, A P

Carbon monoxide-containing gas streams are passed over a catalyst capable of catalyzing the disproportionation of carbon monoxide so as to deposit a surface layer of active surface carbon on the catalyst essentially without formation of inactive coke thereon. The surface layer is contacted with steam and is thus converted to methane and CO2, from which a relatively pure methane product may be obtained. For practical commercial operations utilizing the two-step process of the invention of a cyclic basis, nickel, cobalt, ruthenium, thenium and alloys thereof are especially prepared for use in a metal state, with CO disproportionation being carried out at temperatures up to about 350* C. And with the conversion of active surface carbon methane being carried out by reaction with steam. The catalyst is employed in such cyclic operations without the necessity for employing a regeneration step as part of each processing cycle. Inactive carbon or coke that tends to form on the catalyst over the course of continuous operations utilizing such cyclic process is effectively and advantageously removed, on a periodic basis, in place of conventional burn off with an inert stream containing a low concentration of oxygen.

• Assignee: Union Carbide Corp
• Patent Number(s): US 4242104
• OSTI ID: 6794310
• Resource Relation: Patent File Date: Filed date 9 Oct 1979
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
CARBON MONOXIDE
METHANATION
METHANE
SYNTHESIS
SYNTHESIS GAS
CARBON
CATALYSTS
COBALT
DEPOSITS
NICKEL
RHENIUM
RUTHENIUM
STEAM
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
FLUIDS
GASES
HYDROCARBONS
METALS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REFRACTORY METALS
TRANSITION ELEMENTS
090121* - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989)