Processes and apparatuses for reducing carbon monoxide levels in a gaseous stream
AssigneeUop LLC
InventorBradley Russell
Life of this patent
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Abstract
Processes for reducing carbon monoxide levels in a carbon dioxide rich gaseous stream. The carbon dioxide rich stream is passed to a preferential oxidation zone to selectively convert carbon monoxide to carbon dioxide. Excess oxygen is consumed by reacting with hydrogen, which may be added or controlled based on PSA operating conditions upstream of the preferential oxidation zone. The preferential oxidation zone may be contained within a bed of a dryer.
Claims19
A process for reducing carbon monoxide levels in a gaseous stream, the process comprising:
- providing a carbon dioxide stream comprising greater than 90 mol % carbon dioxide, and further comprising carbon monoxide, hydrogen, and at least one of water, methane, nitrogen, or a combination thereof;
- mixing the carbon dioxide stream with oxygen to provide a mixed stream;
- passing the mixed stream to a preferential oxidation zone having a vessel containing a catalyst and being operated at a temperature of between 50 and 200° C. in order to selectively convert carbon monoxide to carbon dioxide and consume excess oxygen by reaction with hydrogen to form water;
- and
- adjusting an amount of hydrogen passed to the preferential oxidation zone.
A process for reducing carbon monoxide levels in a gaseous stream, the process comprising:
- providing a carbon dioxide stream comprising greater than 90 mol % carbon dioxide, and further comprising carbon monoxide, hydrogen, and at least one of water, methane, nitrogen, or a combination thereof;
- mixing the carbon dioxide stream with oxygen to provide a mixed stream;
- passing the mixed stream to a preferential oxidation zone having a vessel containing a catalyst and being operated at conditions in order to selectively convert carbon monoxide to carbon dioxide and consume excess oxygen by reaction with hydrogen to form water;
- and,
- adjusting an amount of hydrogen passed to the preferential oxidation zone so that an oxygen concentration in an effluent stream from the preferential oxidation zone is less than about 50 ppmv O2.
A process for reducing carbon monoxide levels in a gaseous stream, the process comprising:
- providing a carbon dioxide stream comprising greater than 90 mol % carbon dioxide, and further comprising carbon monoxide, hydrogen, and at least one of water, methane, nitrogen, or a combination thereof;
- mixing the carbon dioxide stream with oxygen to provide a mixed stream;
- and,
- passing the mixed stream to a preferential oxidation zone having a vessel containing a catalyst and being operated at conditions in order to selectively convert carbon monoxide to carbon dioxide and consume excess oxygen by reaction with hydrogen to form water,
- wherein the vessel containing a catalyst comprises a drier.
Dependencies are inferred from the claim text.