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AssigneesL'Air Liquide - Societe Anonyme a'Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude, American Air Liquide, Inc., Air Liquide America Corporation
InventorsFrederick W. Giacobbe, Eric L. Duchateau, Kevin P. McKean
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Apparatus and process for removing carbon monoxide from a gas stream comprising a major portion of an inert gas and a minor portion of carbon monoxide are provided. The process involves contacting a feed gas stream with at least a primary metal oxide in a reaction zone of a reactor vessel at conditions effective to convert substantially all of the carbon monoxide to carbon dioxide, thus producing a purified gas stream consisting essentially of the inert gas and carbon dioxide and substantially free of carbon monoxide. This process has (inter alia) a particular application as a tertiary purification process for producing a more highly purified source of gaseous nitrogen from a source of nitrogen originally produced from a conventional membrane air separation system, wherein the oxygen concentration in the nitrogen stream my vary around a setpoint value, and then further (or secondarily) purified by converting excess oxygen in the nitrogen to carbon monoxide and carbon dioxide using a fuel gas/combustion process, wherein the carbon monoxide concentration varies due to varying oxygen concentration in the feed stream to the combustion process.
A process for removing carbon monoxide from a feed gas stream comprising a major portion of an inert gas and not less than about 50 ppm carbon monoxide, said process comprising converting substantially all of said carbon monoxide to carbon dioxide by contacting said feed gas stream with a noble metal oxide in a reaction zone of a reactor vessel at conditions effective for said conversion to produce a purified gas stream comprising said inert gas and converted carbon dioxide, wherein the concentration of the carbon monoxide in the purified gas stream is less than 5 ppm, and said reaction zone is operated at a temperature ranging from about 100 to about 350° C.
A process for removing carbon monoxide from a feed gas stream comprising a major portion of nitrogen and from about 30 to about 50,000 ppm carbon monoxide, said process comprising the steps of:
A process for removing carbon monoxide from a feed gas stream consisting essentially of an inert gas and not less than about 50 ppm carbon monoxide, said process comprising converting substantially all of said carbon monoxide to carbon dioxide by contacting said feed gas stream with a noble metal oxide in a reaction zone of a reactor vessel at conditions effective for said conversion to produce a purified gas stream comprising said inert gas and carbon dioxide wherein the concentration of the carbon monoxide in the purified gas stream is less than 5 ppm, and said reaction zone is operated at a temperature ranging from about 100 to about 350° C.
Dependencies are inferred from the claim text.