CA2664527A1 - Integrated separation and purification process - Google Patents

Integrated separation and purification process Download PDF

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Publication number
CA2664527A1
CA2664527A1 CA002664527A CA2664527A CA2664527A1 CA 2664527 A1 CA2664527 A1 CA 2664527A1 CA 002664527 A CA002664527 A CA 002664527A CA 2664527 A CA2664527 A CA 2664527A CA 2664527 A1 CA2664527 A1 CA 2664527A1
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CA
Canada
Prior art keywords
stream
hydrogen sulfide
carbon dioxide
produce
enriched
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002664527A
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French (fr)
Other versions
CA2664527C (en
Inventor
Eleftherios Adamopoulos
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honeywell UOP LLC
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Uop Llc
Eleftherios Adamopoulos
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Filing date
Publication date
Application filed by Uop Llc, Eleftherios Adamopoulos filed Critical Uop Llc
Publication of CA2664527A1 publication Critical patent/CA2664527A1/en
Application granted granted Critical
Publication of CA2664527C publication Critical patent/CA2664527C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1425—Regeneration of liquid absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456—Removing acid components
    • B01D53/1462—Removing mixtures of hydrogen sulfide and carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/16—Hydrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/304—Hydrogen sulfide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

Abstract

Processing schemes and arrangements for separating hydrogen sulfide, carbon dioxide and hydrogen from a fluid stream (112) including a solvent-based acid gas separation zone (113,114), a membrane separation zone (118,124) and a pressure swing adsorption unit (140) are provided. At least a portion of a carbon dioxide-lean non-permeate stream (128) produced in the membrane separation zone is recycled to the acid gas separation zone to strip and recover co-absorbed carbon dioxide from the solvent. Recovered carbon dioxide can be beneficially combusted in an associated gas turbine to generate electricity. Additionally, a portion of a pressure swing adsorption tail gas stream (144) and/or a sulfur recovery tail gas stream (156) may also be recycled to the acid gas separation zone for further processing.

Claims (10)

1. A process purifying a fluid stream containing at least hydrogen sulfide, carbon dioxide and hydrogen, the processing scheme comprising:
contacting the fluid stream with a solvent in an absorption zone to produce a sulfur-free fluid stream containing at least hydrogen and a first portion of the carbon dioxide, and a hydrogen sulfide-enriched solvent stream containing at least hydrogen sulfide and a second portion of the carbon dioxide;
contacting at least one first gas separation membrane element in a first membrane separation zone with a first portion of the sulfur-free fluid stream to produce a hydrogen-enriched permeate stream and a first non-permeate stream containing at least carbon dioxide;
contacting at least one second gas separation membrane element in a second membrane separation zone with a first portion of the first non-permeate stream to produce a carbon dioxide-enriched permeate stream and a second non-permeate stream; and contacting the hydrogen sulfide-rich solvent stream with at least a portion of the second non-permeate stream in a carbon dioxide stripping zone to produce a carbon dioxide-enriched fluid stream and hydrogen sulfide-enriched solvent stream.
2. The process of claim 1 wherein the solvent comprises a dimethyl ether of a polyethylene glycol.
3. The process of claim 1 wherein the at least one first gas separation membrane element comprises at least one hollow fiber membrane element and the at least one second gas separation membrane element comprises at least one spiral wound membrane element.
4. The processing scheme of claim 1 wherein the second non-permeate stream comprises less than 5% by volume carbon dioxide.
5. The processing scheme of claim 1 additionally comprising combusting at least a portion of at least one of a second portion of the sulfur-free fluid stream, a second portion of the first non-permeate stream, the carbon dioxide-enriched permeate stream and the carbon dioxide-enriched fluid stream in a gas turbine.
6. The processing scheme of claim 1 additionally comprising treating the hydrogen-enriched permeate stream in pressure swing adsorption unit to produce at least a purified hydrogen stream.
7. The processing scheme of claim 1 additionally comprising treating the hydrogen sulfide-enriched solvent in a hydrogen sulfide stripping zone to produce at least a hydrogen sulfide-depleted solvent stream.
8. The processing scheme of claim 7 additionally comprising combining the hydrogen sulfide-depleted solvent with the solvent in the absorption zone.
9. The process of claim 1 further comprising:
treating at least a portion of the hydrogen-enriched permeate stream in a pressure swing adsorption unit to produce a purified hydrogen stream and a pressure swing adsorption tail gas stream;
treating at least a portion of the hydrogen sulfide-enriched fluid stream in a sulfur recovery unit to produce a purified sulfur stream and a sulfur recovery tail gas stream;
combining at least a portion of the sulfur recovery tail gas stream and the pressure swing adsorption tail gas stream to produce a combined tail gas stream;
compressing the combined tail gas stream in a compression train to produce a compressed tail gas stream;
combining at least a first portion of the compressed tail gas stream with the fluid stream to produce a combined fluid stream; and treating the combined fluid stream in the acid gas separation zone.
10. A system for separating hydrogen sulfide and carbon dioxide from a fluid stream (112) containing at least hydrogen sulfide, carbon dioxide and hydrogen, the system comprising:
an absorbent zone (114) wherein a solvent contacts the fluid stream (112) to produce a hydrogen sulfide-rich solvent stream (115) including at least hydrogen sulfide and a first portion of the carbon dioxide and a sulfur-free fluid stream (116) including at least hydrogen and a second portion of the carbon dioxide;
at least one membrane separation zone (118) including at least one gas permeable membrane element wherein a first portion of the sulfur-free fluid stream (116) contacts the at least one gas permeable membrane element to produce a hydrogen-enriched permeate stream (120) and a non-permeate stream (122);
a pressure swing adsorption unit (140) wherein at least a portion of the hydrogen-enriched permeate stream is treated to produce a purified hydrogen stream (142) and a pressure swing adsorption tail gas stream (144);
a carbon dioxide stripping zone (130) wherein at least a portion of the non-permeate stream (122) contacts the hydrogen sulfide-rich solvent stream (115) to produce a hydrogen sulfide-enriched solvent stream (134) and a carbon dioxide-enriched fluid stream (132);
a hydrogen sulfide stripping zone (146) wherein at least a portion of the hydrogen sulfide-enriched solvent stream (134) is treated to produce a hydrogen sulfide-depleted solvent stream (148) and a hydrogen sulfide-enriched fluid stream (150);
and a sulfur recovery unit (152) wherein at least a portion of the hydrogen sulfide-enriched fluid stream (150) is treated to produce a purified sulfur stream (154) and a sulfur recovery tail gas stream (156).
CA2664527A 2006-09-29 2007-09-28 Integrated separation and purification process Expired - Fee Related CA2664527C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11/537,334 2006-09-29
US11/537,334 US7637984B2 (en) 2006-09-29 2006-09-29 Integrated separation and purification process
PCT/US2007/079928 WO2008042788A2 (en) 2006-09-29 2007-09-28 Integrated separation and purification process

Publications (2)

Publication Number Publication Date
CA2664527A1 true CA2664527A1 (en) 2008-04-10
CA2664527C CA2664527C (en) 2012-01-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2664527A Expired - Fee Related CA2664527C (en) 2006-09-29 2007-09-28 Integrated separation and purification process

Country Status (10)

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US (1) US7637984B2 (en)
CN (1) CN101522595B (en)
AR (1) AR063020A1 (en)
BR (1) BRPI0716564A2 (en)
CA (1) CA2664527C (en)
MX (1) MX2009001742A (en)
MY (1) MY157889A (en)
NO (1) NO20091699L (en)
NZ (1) NZ574725A (en)
WO (1) WO2008042788A2 (en)

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Also Published As

Publication number Publication date
WO2008042788A3 (en) 2008-06-19
AR063020A1 (en) 2008-12-23
CA2664527C (en) 2012-01-31
BRPI0716564A2 (en) 2013-11-05
NO20091699L (en) 2009-04-28
CN101522595B (en) 2013-03-27
MX2009001742A (en) 2009-02-25
CN101522595A (en) 2009-09-02
US20080078294A1 (en) 2008-04-03
NZ574725A (en) 2010-11-26
MY157889A (en) 2016-08-15
WO2008042788A2 (en) 2008-04-10
US7637984B2 (en) 2009-12-29

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