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Title: 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:
 [1];  [2]
  1. (Congers, NY)
  2. (New Fairfield, CT)
Issue Date:
Research Org.:
UNION CARBIDE CORP
OSTI Identifier:
863755
Patent Number(s):
4242104
Assignee:
Union Carbide Corporation (New York, NY) OSTI
DOE Contract Number:  
AC03-78CS40177
Resource Type:
Patent
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 = {1980},
month = {1}
}

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