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WO2009143965A1 - Lessive aminée - Google Patents

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Publication number
WO2009143965A1
WO2009143965A1 PCT/EP2009/003440 EP2009003440W WO2009143965A1 WO 2009143965 A1 WO2009143965 A1 WO 2009143965A1 EP 2009003440 W EP2009003440 W EP 2009003440W WO 2009143965 A1 WO2009143965 A1 WO 2009143965A1
Authority
WO
WIPO (PCT)
Prior art keywords
detergent
amine
carbon dioxide
wash
gas
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.)
Ceased
Application number
PCT/EP2009/003440
Other languages
German (de)
English (en)
Inventor
Horst Weiss
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.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Publication of WO2009143965A1 publication Critical patent/WO2009143965A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B01D53/14—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
    • 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
    • B01D53/1406—Multiple stage 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
    • B01D53/1456—Removing acid components
    • B01D53/1475—Removing 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
    • B01D53/14—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
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • 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

Definitions

  • the invention relates to a method for the parallel separation of carbon dioxide from two raw gases with different levels of carbon dioxide partial pressures, wherein the higher carbon dioxide partial pressure having first raw gas (Rohgasi) in a first amine wash (Wäschel) and the second raw gas (Rohgas2) in a second Amin maybesche (Wäsch2) each a chemical sour gas scrubbing with an amine-containing detergent (amine detergent) is subjected to and collected in the two Amin ⁇ schen, combined with carbon dioxide detergent streams are combined and fed together with a regeneration.
  • first raw gas Rohgasi
  • Wischel first amine wash
  • Rohgas2 second raw gas
  • amine detergent amine-containing detergent
  • the invention relates to a device for carrying out the method according to the invention.
  • Amine washes have long been state of the art and are used in industry in many applications, in particular for the separation of acid gases (CO 2 , H 2 S, COS, HCN) from gas mixtures.
  • the detergents used in amine washes are aqueous solutions of amines from which ions form with the acid gases dissolved in the amine detergent.
  • the amine detergents can be regenerated by pressure release and / or stripping, whereby the ionic species decompose to sour gases and amines.
  • the acid gases are due to the reduced pressure from the amine detergent in the gas phase and / or are stripped off with the aid of steam. After regeneration, the amine detergent can be reused.
  • amine detergent in particular the aqueous solutions of monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), diglycolamine (DGA), methyldiethanolamine (MDEA), as well as activated methyldiethanolamine (z. B. aMDEA ®) have proven technically.
  • MEA monoethanolamine
  • DEA diethanolamine
  • TEA triethanolamine
  • DGA diglycolamine
  • MDEA methyldiethanolamine
  • activated methyldiethanolamine z. B. aMDEA ®
  • a typical field of use for amine washes are synthesis gas plants in which they are used to remove acidic components from synthesis gas.
  • two raw gas streams are produced with different sour gas contents in such systems, wherein a part of the syngas synthesis gas produced by water gas shift and converts the remainder without conversion on to be led.
  • each of the two raw gas streams - after cooling and separation of entrained water - cleaned in a separate amine wash, which is each equipped with an independent detergent regeneration.
  • the financial burden of such a solution is considerable, since amine washing usually already comprises between 15 and 20 apparatuses.
  • the present invention is therefore an object of the invention to provide a method of the type described above and an apparatus for its implementation, which make it possible to separate carbon dioxide from converted and unconverted synthesis gas in a simpler and more economical manner than is possible in the prior art.
  • the starting point of the invention is the dependence of the carbon dioxide absorption capacity of an amine detergent as a function of the prevailing in a gas stream to be separated carbon dioxide partial pressure.
  • the higher the carbon dioxide partial pressure the more the balance of carbon dioxide absorption chemical reaction shifts to the side of the products and the higher the carbon dioxide capacity of the product Amine detergent.
  • the amine detergent used in the laundry 2 per unit weight can absorb less carbon dioxide than the amine detergent used in the laundry.
  • the pre-loaded with carbon dioxide amine detergent from the laundry 2 is thus suitable to be used in the coarse wash of laundry as a detergent for carbon dioxide removal.
  • the carbon dioxide concentration in the gas to be purified is reduced to a required limit.
  • the amine detergent used which is supplied to the laundry unloaded, accumulates with carbon dioxide and is subsequently continued in the coarse wash.
  • the amine detergent is loaded in the delicates far enough that it contains bound as much carbon dioxide per unit weight as the preloaded from Wäsch2 supplied amine detergent.
  • the two detergent streams are combined in the coarse wash and mix up to the outlet from the laundry to a loaded detergent stream with a homogeneous composition, which can be fed directly - and without a further mixing step - the regeneration.
  • an expedient embodiment of the method according to the invention therefore provides that the laden amine detergent from the laundry 2 is cooled before being introduced into the coarse laundry of the laundry. The cooling takes place against an externally supplied coolant and / or against one or more process streams to be heated.
  • any amine detergent is suitable for use in the process according to the invention.
  • aqueous solutions of the primary amines monoethanolamine (MEA) or diethanolamine (DEA) or triethanolamine (TEA) or diglycolamine (DGA) can be used as detergent.
  • particularly suitable are aqueous solutions of secondary and tertiary amines, as these have a much greater dependence of their carbon dioxide absorption capacity of Have carbon dioxide partial pressure.
  • Particularly preferred variants of the process according to the invention therefore provide that an aqueous solution of methyldiethanolamine (MDEA) or activated methyldiethanolamine be used as the amine detergent.
  • MDEA methyldiethanolamine
  • activated methyldiethanolamine be used as the amine detergent.
  • the invention relates to a device for the parallel separation of carbon dioxide from two raw gases with different levels of carbon dioxide partial pressures, comprising a first and a second washing device, in each of which one of the raw gases of an acid gas scrubbing with a chemically acting
  • Detergent (amine detergent) is awakeziehbar, wherein the higher carbon dioxide partial pressure having first crude gas (Rohgasi) in the first washing device and the second raw gas (Rohgas2) in the second washing device can be introduced, and a regenerating device, in which the resulting in the two washing facilities , are loaded with carbon dioxide-laden detergent streams together after their merger.
  • the first washing device comprises a coarse and a delicates and is connected to a transfer device with the second washing device, via which loaded in the second washing device amine detergent as scatteredes detergent in the coarse wash of the first washing device introduced is.
  • the transfer device expediently comprises a throttle body for the position-controlled transfer of the entire detergent stream, the controlled variable of the
  • Liquid level in the bottom of the second washing device is. If the pressure gradient is too small or even negative, then the device according to the invention for conveying the preloaded amine detergent provides a pump as part of the transfer device.
  • a preferred embodiment of the device according to the invention provides a heat exchanger as part of the transfer device, in which the preloaded amine detergent can be cooled.
  • the first washing device is designed as a washing column
  • the upper part is designed as a fine wash
  • its lower part as coarse laundry.
  • Another embodiment of the device according to the invention provides that fine and coarse wash are each designed as independent washing columns.
  • Detergent streams loaded detergent the number of necessary steps and required equipment can be significantly reduced.
  • the merging and homogeneous mixing of the loaded detergent streams is achieved in a simple manner, since the washing devices used for amine washing i.Allg. are designed so that they provide an intensive mixing of the media flowing through them.
  • the main advantage of the invention is, however, that for the amine scrubbing of the first raw gas, a significantly smaller amount of regenerated amine detergent is required than has hitherto been the case. Since this leads at the same time to a reduction of the amount of detergent to be regenerated, the detergent regeneration with much smaller apparatus and with considerable lower consumption of equipment (pump energy, cooling water, steam) are carried out.
  • the figure shows a section of a synthesis gas plant, generated in the two raw gas streams with different levels of carbon dioxide contents and are freed in parallel by amine scrubbing of acid gases, in particular of carbon dioxide.
  • the first raw gas 1 is generated by a water gas shift and subsequent cooling and water separation (not shown) from a hydrogen, carbon monoxide and carbon dioxide and other acid gases containing synthesis crude, while the second raw gas 2 is obtained from the remaining synthesis gas only by cooling and separation of water , Despite the pressure loss in the water gas shift, the first raw gas 1 has a higher carbon dioxide partial pressure than the second raw gas. 2
  • the first crude gas 1 is introduced to separate the acid gases contained in it in the washing column T1 and there with chemically acting amine detergent 7 and 3, which is preferably an aqueous solution of activated methyldiethanolamine, a coarse G and a subsequent delicates F subjected. From the top of the scrubbing column T1, raw hydrogen 4, which has no product quality, is withdrawn. Parallel to this, the second raw gas 2 is introduced into the scrubbing column T2 and there guided by the counter-current
  • Amine detergent 5 freed from acid gases, so that an almost exclusively of hydrogen and carbon monoxide existing oxo gas 6 can be removed from the top of the scrubbing column T2.
  • laden laden amine detergent whose absorption capacity for carbon dioxide under the prevailing conditions is largely exhausted, but which is still able to take in the coarse wash G of the scrubbing column T1 due to the prevailing there higher carbon dioxide partial pressure carbon dioxide.
  • the laden amine detergent is therefore withdrawn by means of the pump P1 from the bottom of the wash column T2 and introduced via line 7 into the coarse wash G of the wash column T1, where it is used as a pre-loaded detergent and where, due to the column internals, it mixes intensively with the amine detergent preloaded in the fine wash F.
  • the condensate is withdrawn via line 1 1 from the separator D and returned by the pump P2 to the head of the stripping column T3, where it serves as a reflux.
  • regenerated amine detergent is conveyed via line 12 from the bottom of the stripping column T3, which, after cooling in the heat exchangers E1 and E4, divided into the two detergent streams 3 and 5 and returned to the two washing columns T1 and T2.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

L'invention concerne un procédé et un dispositif de séparation parallèle de dioxyde de carbone de deux gaz bruts (1,2) qui présentent des pressions partielles différentes de dioxyde de carbone, le premier gaz brut (1) qui présente la plus haute pression partielle de dioxyde de carbone subissant un lavage chimique par gaz acide dans une première lessive aminée (T1) avec un agent de lavage (3, 5, 7) contenant une amine, et le deuxième gaz brut (2) subissant un lavage chimique par gaz acide dans une deuxième lessive aminée (T2) avec un agent de lavage contenant une amine, les écoulements d'agent de lavage chargés de dioxyde de carbone et produits dans les lessives aminées (T1, T2) étant rassemblés et envoyés ensemble (8) à une régénération. La première lessive aminée (T1) est réalisée en deux étapes successives consistant en un lavage grossier (G) et un lavage fin (F), la totalité de l'agent de lavage aminé (7) chargé en dioxyde de carbone de la deuxième lessive aminée (12) étant utilisée comme agent de lavage préchargé dans le lavage grossier (G).
PCT/EP2009/003440 2008-05-27 2009-05-14 Lessive aminée Ceased WO2009143965A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008025224.7 2008-05-27
DE102008025224A DE102008025224A1 (de) 2008-05-27 2008-05-27 Aminwäsche

Publications (1)

Publication Number Publication Date
WO2009143965A1 true WO2009143965A1 (fr) 2009-12-03

Family

ID=40996717

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/003440 Ceased WO2009143965A1 (fr) 2008-05-27 2009-05-14 Lessive aminée

Country Status (2)

Country Link
DE (1) DE102008025224A1 (fr)
WO (1) WO2009143965A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013019357A1 (de) 2013-11-19 2015-05-21 Thyssenkrupp Industrial Solutions Ag Verfahren und Vorrichtung zur Reinigung von Prozessgasen aus der oxidativen Dehydrogenierung von Kohlenwasserstoffen
JP2018187536A (ja) * 2017-04-28 2018-11-29 株式会社Ihi 二酸化炭素の回収システム及び回収方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011017032A1 (de) 2011-04-14 2012-10-18 Linde Aktiengesellschaft Verfahren und Anlage zur Abreicherung von Stickoxiden aus sauerstoffhaltigen Gasströmen
DE102011103994A1 (de) * 2011-06-10 2012-12-13 Solar Fuel Gmbh Verfahren zum Bereitstellen eines in ein Gasnetz einspeisbaren Gasgemisches und dafür geeignete Anlage
EP4414545A1 (fr) 2023-02-08 2024-08-14 Linde GmbH Procédé de fonctionnement d'une turbine à gaz avec séparation de co2

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1279637A (en) * 1968-10-31 1972-06-28 Lummus Co Solvent and process for acid gas scrubbing
US4397660A (en) * 1981-06-15 1983-08-09 Shell Oil Company Process for the removal of H2 S and CO2 from a gas mixture
GB2383276A (en) * 2001-12-21 2003-06-25 Statoil Asa Removal of acidic components from a gas stream
WO2005075056A1 (fr) * 2004-01-20 2005-08-18 Fluor Technologies Corporation Procedes et systemes d'enrichissement de gaz acide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1279637A (en) * 1968-10-31 1972-06-28 Lummus Co Solvent and process for acid gas scrubbing
US4397660A (en) * 1981-06-15 1983-08-09 Shell Oil Company Process for the removal of H2 S and CO2 from a gas mixture
GB2383276A (en) * 2001-12-21 2003-06-25 Statoil Asa Removal of acidic components from a gas stream
WO2005075056A1 (fr) * 2004-01-20 2005-08-18 Fluor Technologies Corporation Procedes et systemes d'enrichissement de gaz acide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013019357A1 (de) 2013-11-19 2015-05-21 Thyssenkrupp Industrial Solutions Ag Verfahren und Vorrichtung zur Reinigung von Prozessgasen aus der oxidativen Dehydrogenierung von Kohlenwasserstoffen
WO2015074747A1 (fr) 2013-11-19 2015-05-28 Thyssenkrupp Industrial Solutions Ag Procédé et dispositif d'épuration de gaz de procédé provenant de la déshydrogénisation oxydative d'hydrocarbures
JP2018187536A (ja) * 2017-04-28 2018-11-29 株式会社Ihi 二酸化炭素の回収システム及び回収方法

Also Published As

Publication number Publication date
DE102008025224A1 (de) 2009-12-03

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