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US 2011/0271713 A1Published application
Purification of Carbon Dioxide
AssigneeAir Products and Chemicals, Inc.
InventorsVincent White, Rodney John Allam
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Abstract
Impure carbon dioxide (“CO2”) comprising a first contaminant selected from the group consisting of oxygen (“O2”) and carbon monoxide (“CO”) is purified by separating expanded impure carbon dioxide liquid in a mass transfer separation column system. The impure carbon dioxide may be derived from, for example, flue gas from an oxyfuel combustion process or waste gas from a hydrogen (“H2”) PSA system.
Claims13
Apparatus for purifying impure carbon dioxide comprising a first contaminant selected from the group consisting of oxygen and carbon monoxide said apparatus comprising:
- a first compressor arrangement for compressing impure carbon dioxide gas to produce compressed impure carbon dioxide gas;
- a condenser arrangement for condensing compressed impure carbon dioxide gas to produce impure carbon dioxide liquid;
- a conduit arrangement for feeding compressed impure carbon dioxide gas from said first compressor arrangement to said condenser arrangement;
- a first pressure reduction arrangement for expanding impure carbon dioxide liquid to produce expanded impure carbon dioxide liquid;
- a conduit arrangement for feeding impure carbon dioxide liquid from said condenser arrangement to said first pressure reduction arrangement;
- a mass transfer separation column system for separating expanded impure carbon dioxide liquid to produce first contaminant-enriched overhead vapor and carbon dioxide bottoms liquid;
- and
- a conduit arrangement for feeding expanded impure carbon dioxide liquid from said first pressure reduction arrangement to said column system.
5 more elements
Dependencies are inferred from the claim text.