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US 8,876,951 B2Granted
Gas purification configurations and methods
AssigneeFluor Technologies Corporation
InventorJohn Mak
Life of this patent
Estimating the term…
Abstract
Acid gas is removed from a feed gas in an absorber that produces a treated feed gas and a rich solvent. The treated feed gas is passed through an H2S scavenger bed, and the H2S scavenger bed is regenerated using H2S depleted acid gas flashed from the rich solvent. Most preferably, the off gas from the regenerating bed is injected into a formation.
Claims14
A method of treating a feed gas that includes CO2 and H2S, comprising:
- removing in an absorber CO2 from a feed gas using a flashed lean physical solvent to so form a treated gas and a rich solvent;
- removing H2S from the treated gas using a molecular sieve bed to thereby form an H2S loaded molecular sieve bed;
- flashing the rich solvent to produce the flashed lean solvent and a CO2-rich stream;
- and
- regenerating the H2S loaded molecular sieve bed using the CO2-rich stream to thereby form an H2S-enriched CO2 product.
2 more elements
A method of regenerating an H2S loaded molecular sieve bed, comprising:
- contacting a molecular sieve bed with a treated feed gas from which CO2 has been removed to so form the H2S loaded molecular sieve bed;
- and
- contacting the H2S loaded molecular sieve bed with the CO2 to thereby regenerate the molecular sieve bed and to thereby form an H2S-enriched CO2 product.
Dependencies are inferred from the claim text.