Cyclic process for producing methane with catalyst regeneration
Abstract
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 CO.sub.2, 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.degree. C. and with the conversion of active surface carbon to 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.
- Inventors:
- Issue Date:
- Research Org.:
- Union Carbide Corporation, New York, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 863755
- Patent Number(s):
- 4242104
- Application Number:
- 06/082472
- Assignee:
- Union Carbide Corporation (New York, NY)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10K - PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- DOE Contract Number:
- AC03-78CS40177
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 1979 Oct 09
- Country of Publication:
- United States
- Language:
- English
- Subject:
- cyclic; process; producing; methane; catalyst; regeneration; carbon; monoxide-containing; gas; streams; passed; capable; catalyzing; disproportionation; monoxide; deposit; surface; layer; active; essentially; formation; inactive; coke; thereon; contacted; steam; converted; relatively; pure; product; obtained; practical; commercial; operations; utilizing; two-step; basis; nickel; cobalt; ruthenium; thenium; alloys; especially; prepared; metal; carried; temperatures; 350; degree; conversion; reaction; employed; necessity; employing; step; processing; cycle; tends; form; course; continuous; effectively; advantageously; removed; periodic; conventional; burn; inert; stream; containing; concentration; oxygen; carbon monoxide-containing; relatively pure; continuous operation; carbon monoxide; gas stream; gas streams; surface layer; stream containing; active surface; containing gas; surface carbon; cyclic process; two-step process; monoxide-containing gas; step process; catalyst capable; inactive coke; active carbon; producing methane; methane product; specially prepared; catalyst regeneration; oxide-containing gas; regeneration step; /48/502/585/
Citation Formats
Frost, Albert C., and Risch, Alan P. Cyclic process for producing methane with catalyst regeneration. United States: N. p., 1980.
Web.
Frost, Albert C., & Risch, Alan P. Cyclic process for producing methane with catalyst regeneration. United States.
Frost, Albert C., and Risch, Alan P. Tue .
"Cyclic process for producing methane with catalyst regeneration". United States. https://www.osti.gov/servlets/purl/863755.
@article{osti_863755,
title = {Cyclic process for producing methane with catalyst regeneration},
author = {Frost, Albert C. and Risch, Alan P.},
abstractNote = {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 CO.sub.2, 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.degree. C. and with the conversion of active surface carbon to 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1980},
month = {Tue Jan 01 00:00:00 EST 1980}
}