EP2046484A1 - Verfahren zum abtrennen von co2 aus gasgemischen - Google Patents
Verfahren zum abtrennen von co2 aus gasgemischenInfo
- Publication number
- EP2046484A1 EP2046484A1 EP07802438A EP07802438A EP2046484A1 EP 2046484 A1 EP2046484 A1 EP 2046484A1 EP 07802438 A EP07802438 A EP 07802438A EP 07802438 A EP07802438 A EP 07802438A EP 2046484 A1 EP2046484 A1 EP 2046484A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- absorbing agent
- amine
- temperature
- bis
- phase separation
- 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.)
- Withdrawn
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
- 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
- B01D53/1425—Regeneration of liquid absorbents
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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 present invention relates to a method for separating CO 2 from gas mixtures and a corresponding device therefor.
- the gas mixture is admixed with a CO 2 -absorbing component, usually an aqueous amine solution, with either carbamic acids or amine carbonates or hydrocarbonates being formed. Subsequently, the CO 2 is released from these compounds again.
- a CO 2 -absorbing component usually an aqueous amine solution
- step c) at least predominantly converting the CO 2 into the aqueous phase, wherein step c) can be carried out partially or completely at the same time as step b).
- phase separation can be triggered by a small change in temperature, in some applications within the present invention, even the waste heat from power plants for the regeneration of the solvent use. So far, high-quality heat in the form of steam had to be used for CCh release.
- the term "at least partially separating off the at least one CO 2 -absorbing agent” is understood to mean, in particular, that> 50%, preferably> 70%, of the at least one CO 2 -absorbing agent (which may optionally be in the form of an aqueous solution or suspension) Separated in contact with the gas mixture and / or gas stream, is transferred in particular into a separated from the gas mixture and / or gas stream container. According to a preferred embodiment of the invention, the entire CO 2 absorbing agent (or optionally the aqueous solution or suspension containing the CO 2 absorbing agent) is separated off.
- the at least one CO 2 -absorbing agent after the phase separation at least predominantly remains in the nonaqueous phase.
- at least predominantly is meant in particular> 70%, preferably> 80%, still more preferably> 90%, furthermore preferably> 95% and most preferably>99%; according to a preferred embodiment of the invention, complete phase separation of the CO 2 takes place Absorbent agent from the aqueous phase.
- step c) - which can take place partially or completely simultaneously with step b) - the CO 2 is at least predominantly converted into the aqueous phase.
- at least predominantly is meant in particular> 70%, preferably> 80%, more preferably> 90%, further preferably> 95% and most preferably> 99%, and according to a preferred embodiment of the invention, a complete conversion of the CO 2 takes place
- the CO 2 gasses out immediately or even simultaneously with the transfer into the aqueous phase and / or the separation of the CO 2 absorbing agent, which is by the phase separation can.
- the phase separation in step b) is brought about by changing the temperature. This has proven to be a viable and practical way of carrying out the present invention for many applications within the present invention.
- “change” may mean a reduction as well as an increase in the temperature
- the phase separation in step b) takes place by increasing the temperature by> 10 ° C.
- the phase separation in step b) at a temperature of> 60 0 C to ⁇ 100 0 C is brought about. This has proven to be advantageous, in particular in processes which play in the power plant sector, because then the waste heat of the power plant can be used to bring about the phase separation.
- the at least one CO 2 absorbing agent comprises an amine.
- amine is meant in particular each component of the form RiR 2 R 3 N, wherein R 1 , R 2 and R 3 are independently selected from the group consisting of hydrogen, alkyl, long-chain alkyl, alkenyl, alkoxy, alkenyl-OX, where X is selected from the group consisting of hydrogen and alkyl, long-chain alkyl, alkylpiperidyl, long-chain alkoxy, cycloalkyl, aryl, arylene, haloalkyl,
- Alkyl primary, secondary or tertiary linear, iso, secondary, tertiary, branched or polyalkyl radicals of length Ci-Ci 2 , in particular Cs-Ci 2 , C 1 -C 10 and / or C 2 -Ci O
- long-chain alkyls linear and branched C 5 -C 2 O alkyls, in particular C 10 -C 15
- Alkenyl primary, secondary or tertiary linear, iso, secondary, tertiary, branched or polyalkenyl radicals of length C 5 -C 12 , in particular C 5 -C 12 , C 1 -C 10 and / or C 2 -CiO
- Cycloalkyl C3-C 9 _Cycloalkyl, in particular C 4 -CG-cycloalkyl and C ⁇ -Cg cycloalkyl
- Alkylpiperidyl Mono, di- or polyalkyl-substituted piperidyl radicals, where the branching can take place via the nitrogen atom or one of the carbon atoms.
- Alkoxy primary, secondary or tertiary linear, iso, secondary, tertiary, branched or polyalkoxy the length C 5 -C 2 »in particular C 5 -C 2, C 1 -C 10 and / or C 2 -CiO
- long-chain alkoxy linear and branched C 5 -C 2 O alkoxy, in particular CiO-Ci 5 Aryl: selected from aromatics with a molecular weight below 300 Da
- Arylenes selected from the group comprising: 1, 2-phenylene; 1,3-phenylene; 1,4-phenylene; 1,2-naphthalenylene; 1,3-naphtalenylene; 1,4-naphthalenylene; 2,3-naphtalenylene; 1-hydroxy-2,3-phenylene; 1-hydroxy-2,4-phenylene; 1-hydroxy-2,5-phenylene; and 1-hydroxy-2,6-phenylene,
- Haloalkyl selected from the group consisting of mono, di, tri, poly and perhalogenated primary, secondary or tertiary linear, iso, secondary, tertiary, branched or polyalkyl radicals of length C5-C12
- the at least one CO 2 -absorbing agent comprises at least one secondary and / or at least one tertiary amine.
- “Secondary amine” is understood in particular as meaning a compound RiR 2 NH, where R 1 , R 2 are selected independently of one another from the group alkyl, long-chain alkyl, alkenyl, alkenyl-OX, where X is selected from the group consisting of hydrogen and alkyl, Alkoxy, long chain alkoxy, cycloalkyl, aryl, arylene, haloalkyl, alkylpiperidyl.
- tertiary amine is meant in particular a compound RiR 2 R 3 N, wherein R 1 , R 2 and R 3 are independently selected from the group alkyl, long-chain alkyl, alkenyl, alkenyl-OX
- the at least one CO 2 -absorbing agent has a boiling point of> 100 0 C.
- the at least one CO 2 -absorbing agent is a mixture of components
- each of the components and / or the mixture of the components has a boiling point of> 100 0 C;
- each of the components as well as the mixture of the components has a boiling point of> 100 ° C.
- the at least one CO 2 -absorbing agent has a boiling point of> 110 0 C, more preferably> 120 0 C.
- the at least one CO 2 -absorbing agent has a pK s value of> 7.5 and ⁇ 11.
- the at least one CO 2 absorbing agent is a mixture of components
- each of the components and / or the mixture of the components has a pK s of> 7.5 and ⁇ 11;
- each of the components as well as the mixture of components has a pK s of> 7.5 and ⁇ ll.
- the at least one CO 2 -absorbing agent has a pK s value of> 8 and ⁇ 10.5, more preferably> 9 and ⁇ 10.
- the at least one CO 2 -absorbing agent has a density of> 0.7 and ⁇ 1.1 g / ml at 25 ° C.
- each of the components and / or the mixture of the components at 25 ° C has a density of> 0.7 and ⁇ 1, 1 g / mL;
- each of the components as well as the mixture at 25 ° C has a density of> 0.7 and ⁇ 1.1.
- the at least one CO 2 -absorbing agent is a mixture of components
- each of the components and / or the mixture of the components at the absorption temperature a solubility in water of> O, 1M and ⁇ 5M having;
- each of the components as well as the mixture at the absorption temperature has a solubility in water of> 0, lund ⁇ 5M.
- the at least one CO 2 -absorbing agent at the absorption temperature has a solubility in water of> 0.2 M and ⁇ 4.5 M, more preferably> 1 M and ⁇ 4 M.
- the at least one CO 2 -absorbing agent is a mixture of components
- each of the components and / or the mixture of the components at the regeneration temperature a solubility in water of> 0.001 M and ⁇ 0.3 M;
- both each of the components as well as the mixture of at 60 0 C a solubility in water of> 0.001 M and ⁇ 0.3 M.
- the at least one CO 2 absorbing agent has a solubility in water of> 0.01 M and ⁇ 0.1 L at the regeneration temperature.
- the at least one CO 2 -absorbing agent comprises at least one secondary and at least one tertiary amine.
- Such component mixtures have proven to be useful in many applications, since secondary amines often have a fast - but reversible - binding kinetics to the CO 2 , while tertiary amines, although often less rapidly react with CO 2 , the bond (which usually salt like hydrogencarbonates the approximate structure R 3 NH + HCO 3 " is carried out) but then is usually so little reversible that under the conditions of step a) often no back-reaction occurs.
- the ratio of the at least one secondary amine to the at least one tertiary amine is> 1: 0.5 and ⁇ 1: 30. This has proven to be practical for many applications.
- the ratio of the at least one secondary amine to the at least one tertiary amine is> 1: 1 and ⁇ 1: 20, more preferably> 1: 2 and ⁇ 1:10.
- the ratio of the at least one secondary amine to the at least one tertiary amine is> 1: 1 and ⁇ 1: 20, more preferably> 1: 2 and ⁇ 1:10.
- the ratio of the at least one secondary amine to the at least one tertiary amine is> 1: 1 and ⁇ 1: 20, more preferably> 1: 2 and ⁇ 1:10.
- a preferred embodiment of the invention comprising at least one CO 2 - absorbing at least one secondary amine with an absorption rate of> 10 ⁇ 6 and ⁇ 10 ⁇ 4 kmol m ⁇ 2 s "1, this has proved to be practical for many applications..
- At least one CO 2 - absorbing at least one secondary amine with an absorption rate of> 5 * 10 -5 and ⁇ 10 ⁇ 4 kmol m ⁇ 2 s "1, more preferably> 10 ⁇ 5 and ⁇ 10 ⁇ 4 kmol m "2 s " 1 .
- At least one CO 2 - absorbing means comprises at least a tertiary amine having an absorption rate of> 10 ⁇ 7 and ⁇ 10 ⁇ 5 kmol rrf 2 s "1 at absorption temperature This has been found for many applications to be practical. ,
- At least one CO 2 - absorbing means comprises at least a tertiary amine having an absorption rate of> 5 * 10 "6 and ⁇ 10 ⁇ 5 kmol m" 2 s "1 at the absorption temperature, more preferably of> 10 ⁇ 6 and ⁇ 10 ⁇ 5 kmol
- the at least one CO 2 absorbing agent comprises at least one primary amine selected from the group consisting of pentylamine, hexylamine, heptylamine, octylamine, cyclohexylamine, 2-methylcyclohexylamine, 2-methylbutylamine, 2-aminopentane, 2-aminoheptane, 2-aminohexane, 2-aminooctane, 2-aminononane, 3-methoxypropylamine, 2-methyl-l, 5-diaminopentane, geranylamine, 2-ethyl-1-hexylamine, 6-methyl-2-heptylamine, cyclooctylamine, aniline, N- Phenylethylenediamine, 2-phenylethylamine, N, N-dimethyl-4-cyclooctene-1-amine
- the at least one CO 2 absorbing agent comprises at least one secondary amine selected from the group consisting of dipropylamine, N-ethylbutylamine, dibutylamine, diisopropylamine, dicyclohexylamine, bis (2-ethylhexyl) amine, bis (alpha-methylbenzyl ) amine, bis (1,3-dimethylbutyl) amine, diallylamine, bis [(s) -1-phenylethyl] amine, di-sec-butylamine, 2,2,6,6-tetramethylpiperidine, N-methylcyclohexylamine, benzyl tert-butylamine, bis (2-ethylhexyl) amine, 4-tert-butylcyclohexylamine
- the at least one CO 2 -absorbing agent comprises at least one tertiary amine selected from the group consisting of triethylamine, 2- (diethylamino) ethanol, tripropylamine, tributylamine, N 5 N-dimethylcyclohexylamine, dimethyloctylamine, dimethyl ( 1-methylheptyl) amine, dimethylallylamine, N-ethyldiisopropylamine, tris (2-ethylhexyl) amine, bis (2-cyclohexyloxyethyl) methylamines, bis (2- (2,4-diethyl-octyloxy ) -ethyl) -methyl-amines, (2- (2-dimethylamino-ethoxy) -ethyl) -dimethyl-amine, N-isopropylethylenediamine, N-methylenediamine, N 5 N-dimethylethylene
- an aqueous solution of the at least one CO 2 -absorbing agent having a concentration of> 1M and ⁇ 5M is used in step a).
- the method additionally comprises the step d) heating the aqueous phase to liberate the CO 2 .
- the present invention also relates to an apparatus for carrying out the method according to the invention.
- FIG. 1 shows a schematic representation of an apparatus for carrying out the method according to the invention according to a first embodiment of the invention.
- the device 1 shows a schematic representation of a device 1 for carrying out the method according to the invention according to a first embodiment of the invention.
- the device 1 has an absorber 10 in which the gas flow (indicated by the arrows) is brought into contact with the CO 2 -absorbing agent (which in the specific embodiment represents an aqueous solution of a secondary amine and a tertiary amine).
- the CO 2 -absorbing agent which in the specific embodiment represents an aqueous solution of a secondary amine and a tertiary amine.
- the CO 2 -absorbing agent Via a pump 20, the CO 2 -absorbing agent is then placed in a first container 30 and then heated by means of a heat exchanger 40 so that in the container 50, a phase separation takes place (as indicated by "aq” and "org".).
- a phase separation takes place (as indicated by "aq" and "org”.).
- all devices known to those skilled in the art, such as centrifuges etc. may be present for this
- the temperature in the container 50 is about 70-80 0 C. This has the result that the CO 2 to escape directly from the aqueous phase and can thus be collected easily.
- further devices may be present in which, for example, the aqueous phase is separated and separately expelled by heating the CO 2 and so collected.
- the temperature is lowered again and the CO 2 - absorbing agent and the aqueous phase are collected in the container 70, where again there is a homogeneous phase.
- This is connected via a pump 80 to the absorber 10, so that a continuous process can be run.
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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)
- Treating Waste Gases (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006036228A DE102006036228A1 (de) | 2006-08-03 | 2006-08-03 | Verfahren zum Abtrennen von CO2 aus Gasgemischen |
PCT/EP2007/057907 WO2008015217A1 (de) | 2006-08-03 | 2007-07-31 | Verfahren zum abtrennen von co2 aus gasgemischen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2046484A1 true EP2046484A1 (de) | 2009-04-15 |
Family
ID=38672444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07802438A Withdrawn EP2046484A1 (de) | 2006-08-03 | 2007-07-31 | Verfahren zum abtrennen von co2 aus gasgemischen |
Country Status (5)
Country | Link |
---|---|
US (1) | US8470079B2 (de) |
EP (1) | EP2046484A1 (de) |
CN (1) | CN101500691B (de) |
DE (1) | DE102006036228A1 (de) |
WO (1) | WO2008015217A1 (de) |
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FR2900842B1 (fr) * | 2006-05-10 | 2009-01-23 | Inst Francais Du Petrole | Procede de desacidification d'un effluent gazeux avec extraction des produits a regenerer |
-
2006
- 2006-08-03 DE DE102006036228A patent/DE102006036228A1/de not_active Withdrawn
-
2007
- 2007-07-31 WO PCT/EP2007/057907 patent/WO2008015217A1/de active Application Filing
- 2007-07-31 US US12/375,567 patent/US8470079B2/en not_active Expired - Fee Related
- 2007-07-31 CN CN2007800289931A patent/CN101500691B/zh not_active Expired - Fee Related
- 2007-07-31 EP EP07802438A patent/EP2046484A1/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
KOHL A L, NIELSEN R B: "Gas Purification - Fifth Edition", 1997, GULF PUBLISHING COMPANY, Houston, Texas * |
Also Published As
Publication number | Publication date |
---|---|
US20100288126A1 (en) | 2010-11-18 |
CN101500691B (zh) | 2011-09-28 |
DE102006036228A1 (de) | 2008-02-07 |
CN101500691A (zh) | 2009-08-05 |
US8470079B2 (en) | 2013-06-25 |
WO2008015217A1 (de) | 2008-02-07 |
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