초록 ▼

A gas separation apparatus and process has a first pressure swing adsorption (PSA) unit (110) receiving feed gas (112), which comprises a first and a second component. First PSA unit (110) produces first product gas (114) pre-dominantly containing the first component, and first off gas (116) contain

A gas separation apparatus and process has a first pressure swing adsorption (PSA) unit (110) receiving feed gas (112), which comprises a first and a second component. First PSA unit (110) produces first product gas (114) pre-dominantly containing the first component, and first off gas (116) containing at least some of the first component and second component. Compressor (120) is coupled to first PSA unit (110) to compress first off gas (116) to form compressed off gas (126), which is passed downstream to absorber unit (130), which employs a solvent to remove at least part of the second component from compressed off gas (126), forming an enriched compressed off gas (136B). Second PSA unit (140) receives enriched compressed off gas (136B) and produces second product gas (142) which predominantly contains the first component and a second off gas that is sent to waste or reformer burner (150).

대표청구항 ▼

1. A method of recovering a first component and a second component from an offgas of a first pressure swing adsorption (PSA) unit, comprising: compressing the offgas to produce a compressed offgas stream; recovering at least some of the second component from the compressed offgas stream to produ

1. A method of recovering a first component and a second component from an offgas of a first pressure swing adsorption (PSA) unit, comprising: compressing the offgas to produce a compressed offgas stream; recovering at least some of the second component from the compressed offgas stream to produce an enriched compressed offgas stream that is at least partially depleted from the second component; passing the enriched compressed offgas stream to a second PSA unit to recover at least some of the first component; and further comprising providing the feed gas as a gas stream from a steam reformer. 2. The method of claim 1 wherein the first component is H2. 3. The method of claim 1 wherein the second component is CO2. 4. The method of claim 1 further comprising utilizing a solvent to recover at least part of the second component. 5. The method of claim 4 further comprising recovering at least part of the second component from the solvent by decompression of the solvent. 6. The method of claim 5 further comprising combusting at least part of the recovered second component in a steam reformer burner. 7. The method of claim 1 further comprising combusting at least part of the second offgas in a steam reformer burner. 8. A gas separation apparatus, comprising: a first pressure swing adsorption (PSA) unit that receives a feed gas comprising at least a first component and a second component, wherein the first PSA unit produces a first product gas predominantly comprising the first component, and a first offgas comprising at least some of the first component and at least some of the second component; a compressor fluidly coupled to the first PSA unit that compresses the offgas to form a compressed offgas; an absorber unit downstream of the compressor that employs a solvent to remove at least part of the second component from the compressed offgas to form an enriched compressed offgas that is at least partially depleted from the second component; a second PSA unit that receives the enriched compressed offgas and produces a second product gas predominantly comprising the first component, and a second Offgas; and further comprising a flash unit that regenerates the solvent and produces a stream of concentrated second component. 9. The apparatus of claim 8 further comprising a liquefaction unit fluidly coupled to the flash unit that liquefies the second component stream. 10. The apparatus of claim 9 wherein the liquefaction unit comprises an autorefrigeration system. 11. The apparatus of claim 8 further comprising a reformer burner that receives at least part of the second offgas. 12. The apparatus of claim 8 wherein the first PSA unit is a hydrogen PSA unit. 13. The apparatus of claim 8 wherein the feed gas comprises a gas stream from a steam reformer. 14. The apparatus of claim 13 wherein the gas stream predominantly comprises H2,CO2,CO, and CH4. 15. The apparatus of claim 8 wherein the fit component is H2. 16. The apparatus of claim 8 wherein the second component is CO2. 17. The apparatus of claim 8 wherein the compressed offgas has a pressure of between 300-500 psig. 18. The apparatus of claim 8 wherein the solvent is selected from the group consisting of a dimethylether of polyethylene glycol and propylene carbonate.