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US 6,669,916 B2Granted
Method and apparatus for purifying carbon dioxide feed streams
AssigneePraxair Technology, Inc.
InventorsCarl Joseph Heim, Amitabh Gupta
Life of this patent
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Abstract
Disclosed are a carbon dioxide purification process and apparatus including (i) an adsorbing step for removing a predetermined amount of hydrocarbons from a carbon dioxide feed gas to reduce the caloric value of the feed stream, and (ii) a catalytic oxidation step located downstream of the adsorbing step for removing residual hydrocarbons from the feed gas by catalytic oxidation.
Claims8
A process for purifying a feed gas which comprises at least 95 wt. % carbon dioxide and further comprises hydrocarbon contaminants, the process comprising the steps of:
- (i) adsorbing hydrocarbons from said feed gas to an extent corresponding to a sufficient reduction of the caloric content of the feed gas that the gas stream produced in this step can be catalytically oxidized in a single catalytic oxidation reactor;
- and
- (ii) catalytically oxidizing hydrocarbons remaining in the gas stream produced in step (i).
Dependencies are inferred from the claim text.