CN105289207A - Triethanolamine compound amine absorbent for capturing carbon dioxide - Google Patents
Triethanolamine compound amine absorbent for capturing carbon dioxide Download PDFInfo
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- CN105289207A CN105289207A CN201510648658.8A CN201510648658A CN105289207A CN 105289207 A CN105289207 A CN 105289207A CN 201510648658 A CN201510648658 A CN 201510648658A CN 105289207 A CN105289207 A CN 105289207A
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- Prior art keywords
- triethanolamine
- carbon dioxide
- absorbent
- amine
- serotonin
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- 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
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- 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
The invention discloses a triethanolamine compound amine absorbent for capturing carbon dioxide. The triethanolamine compound amine absorbent is mainly prepared from triethanolamine, an activating agent and the balance of water, wherein the activating agent is an organic amine absorbent of which a molecule contains a primary amine/secondary amine group; the mole ratio of the triethanolamine to the activating agent is 1 to 5:1. The compound absorbent disclosed by the invention has high absorption rate for low-pressure carbon dioxide, good desorption effect and lower energy consumption for capturing and separating the low-pressure carbon dioxide; since the triethanolamine is tertiary amine and is high in boiling point, the stability of the tertiary amine molecule is better than that of the primary amine and the secondary amine, and degradation loss of solvent in the use process can be greatly reduced. The triethanolamine compound amine absorbent can be used for capturing or separating various normal-pressure gas mixtures such as carbon dioxide in flue gases exhausted from coal-fired power plants, iron, steel and cement enterprises, petrochemical engineering enterprises and the like.
Description
Technical field
The invention belongs to resource environment, chemical technology field, particularly the serotonin absorbent of capturing carbon dioxide gas.
Background technology
CO
2isothermal chamber gas purging is the principal element causing global climate constantly to worsen, how efficient from being rich in CO
2admixture of gas in, trapping or separation of C O
2just seem very important.These admixture of gas comprise the flue gas of enterprise's discharges such as coal-burning power plant, iron and steel cement, petrochemical industry.CO generally containing 5% ~ 30% in these admixture of gas
2, other predominant gas composition comprises N
2, O
2, CO, H
2, CH
4, C
2h
6, SO
2, H
2s and organic sulfur CH
3s, COS etc.; The pressure range large (50 ~ 9000kPa) of gas, is applicable to adopting chemical absorbing or Chemical Physics composite absorption method trapping separation of C O
2component.
The collecting carbonic anhydride method reported mainly contains: chemical absorption method, physisorphtion, membrane separation process, Production by Catalytic Combustion Process, bioanalysis etc.Commercial Application be mainly first two method, wherein Physical Absorption method is mainly used in high pressure and the higher source of the gas of carbon dioxide content, high to equipment requirement.And chemical absorption method can carry out under normal pressure or lower pressure, and also there is good assimilation effect to low fractional pressure carbon dioxide, be used widely.
Industrial comparatively ripe chemical absorption method traps separation of C O both at home and abroad at present
2technique have MEA method (MEA), diethanolamine method (DEA), diisopropanolamine process (DIPA) and methyl diethanolamine method (MDEA).In order to improve absorbent solution to CO
2infiltration rate, so for the slower solvent of the infiltration rates such as diisopropanolamine (DIPA) (DIPA), methyl diethanolamine (MDEA), add infiltration rate faster solvent as MEA (MEA) and piperazine (PZ) etc., form the method for absorbing and separating of some modified forms.
In order to reduce energy consumption further, because it is to CO
2solubility is high, desorption effect is better, and the circulating load of absorption and desorption is higher, and 2-amino-2-methyl-1-propanol (AMP) positional matrix have also been obtained some application.But due to the special construction of these bulky amine, cause degraded in use many, use cost is still higher.
BASF AG develops and add N methyldiethanol amine (MDEA) in MEA solution, can generate and a kind of there is the solvent (Chem.Eng.Prog.81 (4) 1985) that fabulous absorption characteristic has again splendid desorption properties, but unresolved CO
2low and the corrosion problems of absorption rate.
2002 Chinese patent (CN1381301A) disclose a kind of antioxidant suppressing MEA to degrade, antioxidant is made up of solid metal oxide and its esters, and metal ion is the element of period 4 and period 5.The degradation rate of MEA and solvent can be reduced to the corrosion of equipment.
2002 Chinese patent (CN1354036A) disclose a kind of method removing carbon dioxide from admixture of gas, its absorbent is the compound aqueous solution that the non-linear carbochain alcohol amine compound that MEA and nitrogen-atoms have space steric effect forms.This serotonin solution is compared with traditional MEA solution, and absorbability improves 40%.
2009 Chinese patent (CN101612509A) disclose from containing CO
2mist in remove CO
2serotonin decarbonizing solution, wherein main absorbent components is 10.0 to 35% monoethanolamines, AEEA, absorbent components is helped to be 5 to 30%2-amino-2-methylol-1, ammediol, 2-amino-2-methyl-1-propanol, N methyldiethanol amine and triethanolamine, activating component is 1 to 10% piperazine, hydroxyethyl piperazine, aminoethyl piperazine and diethanol amine, corrosion inhibiter is 0.05 to 1.0% sodium vanadate, and antioxidant is 0.05 to 1.0% sodium sulfite and Schweinfurt green.The ability that its solution absorbs is 35 ~ 50/ solution, and desorption temperature is low, and the time is short.
2011 Chinese patent (CN102218254A) disclose and remove CO
2serotonin decarbonizing solution, wherein main absorbent components is monoethanolamine, and activating component is one or more mixtures in piperazine, N-(2-ethoxy) ethylenediamine, diethylenetriamine, triethylene tetramine or TEPA.It is 3mol/L that its solution absorbs total amine concentration, has absorption rate fast, the advantage that desorption quantity is high.
From document, the patent delivered both at home and abroad at present, based on the absorbent of absorption rate MEA etc. faster, general cooperation absorbefacient, the composition such as anticorrisive agent, corrosion inhibiter compound decarburization absorbing liquid, but its comprehensive decarburization capacity is general lower, and regeneration energy consumption is high, and equipment corrosion is strong, and composite absorber makes absorption rate decline, economic benefit can not be made to reach optimization.
Therefore, be necessary to propose that assimilation effect is excellent, the absorbent of trapping that energy consumption is lower or separating carbon dioxide.Summary of the invention
The object of the present invention is to provide a kind of triethanolamine serotonin absorbent of capturing carbon dioxide gas, this raw material only need mix with water, can realize efficient trapping.
For achieving the above object, technical scheme of the present invention is:
The present invention is made up of triethanolamine and activator, and described activator is the organic amine absorbent containing primary amine or secondary amine group in molecule.
Activator is respectively one or more mixtures in monoethanolamine MEA, piperazine PZ, N-(2-ethoxy) ethylenediamine AEEA, N-aminoethyl piperazine AEP.
The mol ratio of triethanolamine and activator is 1 ~ 5:1.
The mol ratio of triethanolamine and monoethanolamine is 1 ~ 2:1.
The mol ratio of triethanolamine and N-aminoethyl piperazine is 1 ~ 2:1.
The mol ratio of triethanolamine and N-aminoethyl piperazine is 3 ~ 5:1.
Described organic amine composite absorber is obtained by mixing in the soluble end of described serotonin by the serotonin of capturing carbon dioxide gas and water.
Beneficial effect of the present invention is: the serotonin of capturing carbon dioxide gas of the present invention adopts more cheap TEA to be absorbent main body, has the advantages that cost is low, is conducive to commercial Application; The serotonin absorbent of this capturing carbon dioxide gas has large absorption rate, can reach 0.045260401mol/L.min, is 7.78 times of one pack system TEA absorbent absorption maximum speed; By Average absorption rate, comparatively TEA is the highest improves 7.2 times (examples 6) for absorbability; Have high desorption efficiency 82.26%, compared with TEA solution, desorption quantity comparatively TEA can improve 16% (example 6).Be suitable for the carbon dioxide in multiple chemical reaction tail gas, combustion flue gas and natural mist, also can be used for the carbon dioxide removed in town gas, natural gas etc.
Detailed description of the invention
Below content of the present invention is described in further detail.
Embodiment 1
Be that TEA (triethanolamine) solution of 3mol/L is as absorbing liquid using 1000ml molar concentration, under ambient temperature is 20 DEG C of conditions, pass into the flow velocity of 575ml/min in the lucite packed tower that loose heap Raschig ring is housed, measurement real-time gas flow is carried out, the absorption rate calculated thus and uptake with gas flowmeter.Recording absorption maximum speed is 0.005820133mol/L.min, and Average absorption rate is 0.003564573mol/L.min.
Absorption is terminated gained rich solution to get 50ml and utilize strong acid to put weak acid principle to carry out desorb, and utilize drainage to measure its complete desorption quantity, desorption quantity is 414ml.
Absorption end gained rich solution is got 50ml under 120 DEG C of conditions, carries out desorb, and utilize drainage to measure its desorption quantity, desorption quantity is 120ml.
According to above-mentioned two step desorption result, calculating desorption efficiency is 71.01%.
Embodiment 2
The serotonin of capturing carbon dioxide gas in the present embodiment: TEA and the MEA (monoethanolamine) being 2:1 by mol ratio forms; The serotonin absorbent of capturing carbon dioxide gas: the serotonin for total amine concentration being the capturing carbon dioxide gas of 3mol/L.
Be that TEA and the MEA composite solution of 2:1 is as absorbing liquid using 1000ml mol ratio, under ambient temperature is 20 DEG C of conditions, pass into the flow velocity of 575ml/min in the lucite packed tower that loose heap Raschig ring is housed, measurement real-time gas flow is carried out, the absorption rate calculated thus and uptake with gas flowmeter.Record absorption maximum speed 0.023857456mol/L.min, comparatively example 1 improves 309.9%; Average absorption rate is 0.008407877mol/L.min, and comparatively example 1 improves 135.9%.
Absorption is terminated gained rich solution to get 50ml and utilize strong acid to put weak acid principle to carry out desorb, and utilize drainage to measure its complete desorption quantity, desorption quantity is 910ml.
Absorption end gained rich solution is got 50ml under 120 DEG C of conditions, carries out desorb, and utilize drainage to measure its desorption quantity, desorption quantity is 370ml.
According to above-mentioned two step desorption result, calculating desorption efficiency is 59.34%, and comparatively example 1 reduces by 16.4%.
Embodiment 3
The serotonin of capturing carbon dioxide gas in the present embodiment: TEA and the PZ (piperazine) being 2:1 by mol ratio forms; The serotonin absorbent of capturing carbon dioxide gas: the serotonin for total amine concentration being the capturing carbon dioxide gas of 3mol/L.
Be that MEA and the PZ composite solution of 2:1 is as absorbing liquid using 1000ml mol ratio, under ambient temperature is 20 DEG C of conditions, pass into the flow velocity of 575ml/min in the lucite packed tower that loose heap Raschig ring is housed, measurement real-time gas flow is carried out, the absorption rate calculated thus and uptake with gas flowmeter.Record absorption maximum speed 0.025296345mol/L.min, comparatively example 1 improves 334.6%; Average absorption rate is 0.012283776mol/L.min, and comparatively example 1 improves 244.6%.
Absorption is terminated gained rich solution to get 50ml and utilize strong acid to put weak acid principle to carry out desorb, and utilize drainage to measure its complete desorption quantity, desorption quantity is 820ml.
Absorption end gained rich solution is got 50ml under 120 DEG C of conditions, carries out desorb, and utilize drainage to measure its desorption quantity, desorption quantity is 350ml.
According to above-mentioned two step desorption result, calculating desorption efficiency is 57.32%, and comparatively example 1 reduces by 19.3%.
Embodiment 4
The serotonin of capturing carbon dioxide gas in the present embodiment: TEA and the AEP (N-aminoethyl piperazine) being 2:1 by mol ratio forms; The serotonin absorbent of capturing carbon dioxide gas: the serotonin for total amine concentration being the capturing carbon dioxide gas of 3mol/L.
Be that TEA and the AEP composite solution of 2:1 is as absorbing liquid using 1000ml mol ratio, under ambient temperature is 20 DEG C of conditions, pass into the flow velocity of 575ml/min in the lucite packed tower that loose heap Raschig ring is housed, measurement real-time gas flow is carried out, the absorption rate calculated thus and uptake with gas flowmeter.Record absorption maximum speed 0.027478767mol/L.min, comparatively example 1 improves 372.1%; Average absorption rate is 0.017510434mol/L.min, and comparatively example 1 improves 391.2%.
Absorption is terminated gained rich solution to get 50ml and utilize strong acid to put weak acid principle to carry out desorb, and utilize drainage to measure its complete desorption quantity, desorption quantity is 1280ml.
Absorption end gained rich solution is got 50ml under 120 DEG C of conditions, carries out desorb, and utilize drainage to measure its desorption quantity, desorption quantity is 260ml.
According to above-mentioned two step desorption result, calculating desorption efficiency is 79.69%, and comparatively example 1 improves 12.2%.
Embodiment 5
The compound of capturing carbon dioxide gas in the present embodiment: TEA and the AEEA (N-(2-ethoxy) ethylenediamine) being 2:1 by mol ratio forms; The serotonin absorbent of capturing carbon dioxide gas: the serotonin absorbent for total amine concentration being the capturing carbon dioxide gas of 2mol/L.
Be that TEA and the AEEA composite solution of 2:1 is as absorbing liquid using 1000ml mol ratio, under ambient temperature is 20 DEG C of conditions, pass into the flow velocity of 575ml/min in the lucite packed tower that loose heap Raschig ring is housed, measurement real-time gas flow is carried out, the absorption rate calculated thus and uptake with gas flowmeter.Record absorption maximum speed 0.0176668mol/L.min, comparatively example 1 improves 203.5%; Average absorption rate is 0.013883593mol/L.min, and comparatively example 1 improves 289.5%.
Absorption is terminated gained rich solution to get 50ml and utilize strong acid to put weak acid principle to carry out desorb, and utilize drainage to measure its complete desorption quantity, desorption quantity is 1083ml.
Absorption end gained rich solution is got 50ml under 120 DEG C of conditions, carries out desorb, and utilize drainage to measure its desorption quantity, desorption quantity is 380ml.
According to above-mentioned two step desorption result, calculating desorption efficiency is 64.91%, and comparatively example 1 reduces by 8.6%.
Embodiment 6
The serotonin of capturing carbon dioxide gas in the present embodiment: TEA and the AEP (N-aminoethyl piperazine) being 1:1 by mol ratio forms; The serotonin absorbent of capturing carbon dioxide gas: the serotonin for total amine concentration being the capturing carbon dioxide gas of 3mol/L.
Be that TEA and the AEP composite solution of 1:1 is as absorbing liquid using 1000ml mol ratio, under ambient temperature is 20 DEG C of conditions, pass into the flow velocity of 575ml/min in the lucite packed tower that loose heap Raschig ring is housed, measurement real-time gas flow is carried out, the absorption rate calculated thus and uptake with gas flowmeter.Record absorption maximum speed 0.045260401mol/L.min, comparatively example 1 improves 677.6%; Average absorption rate is 0.029244699mol/L.min, and comparatively example 1 improves 720.4%.
Absorption is terminated gained rich solution to get 50ml and utilize strong acid to put weak acid principle to carry out desorb, and utilize drainage to measure its complete desorption quantity, desorption quantity is 1240ml.
Absorption end gained rich solution is got 50ml under 120 DEG C of conditions, carries out desorb, and utilize drainage to measure its desorption quantity, desorption quantity is 220ml.
According to above-mentioned two step desorption result, calculating desorption efficiency is 82.26%, and comparatively example 1 improves 15.8%.
Embodiment 7
The serotonin of capturing carbon dioxide gas in the present embodiment: TEA and the AEP (N-aminoethyl piperazine) being 5:1 by mol ratio forms; The serotonin absorbent of capturing carbon dioxide gas: the serotonin for total amine concentration being the capturing carbon dioxide gas of 3mol/L.
Be that TEA and the AEP composite solution of 5:1 is as absorbing liquid using 1000ml mol ratio, under ambient temperature is 20 DEG C of conditions, pass into the flow velocity of 575ml/min in the lucite packed tower that loose heap Raschig ring is housed, measurement real-time gas flow is carried out, the absorption rate calculated thus and uptake with gas flowmeter.Record absorption maximum speed 0.030432961mol/L.min, comparatively example 1 improves 422.9%; Average absorption rate is 0.015248341mol/L.min, and comparatively example 1 improves 327.8%.
Absorption is terminated gained rich solution to get 50ml and utilize strong acid to put weak acid principle to carry out desorb, and utilize drainage to measure its complete desorption quantity, desorption quantity is 1060ml.
Absorption end gained rich solution is got 50ml under 120 DEG C of conditions, carries out desorb, and utilize drainage to measure its desorption quantity, desorption quantity is 240ml.
According to above-mentioned two step desorption result, calculating desorption efficiency is 77.36%, and comparatively example 1 improves 8.9%.
From above-mentioned, at TEA: in the example 2,3,4,5 of activator=2:1, have higher absorption rate than one pack system TEA example 1, show that activator can improve the assimilation effect of serotonin absorbent preferably, wherein example 6 has the highest absorption rate.Make absorption rich solution carry out desorb at 120 DEG C can find out, the desorption efficiency that only with the addition of the compound organic amine absorbent after N-aminoethyl piperazine in example 2,3,4,5 is greater than example 1, proves good desorption effect.
Change the proportioning of main absorbent and activator, as can be seen from example 6,7, the amount improving activator can improve absorption rate and the desorption efficiency of compound prescription.In embodiment, be all the TEA of 3mol/L with concentration be main absorbent, but be not limited to this concentration range, any concentration in water-soluble soluble end all can realize.
Serotonin absorbent of the present invention has good assimilation effect, desorption effect, and whole absorbent adopts the TEA of low cost for absorbing main body, can reduce the expense of actual motion, have certain Social benefit and economic benefit.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by referring to the preferred embodiments of the present invention, invention has been described, but those of ordinary skill in the art is to be understood that, various change can be made to it in the form and details, and not depart from the spirit and scope of the present invention that appended claims limits.
Claims (7)
1. the triethanolamine serotonin absorbent of capturing carbon dioxide gas, is characterized in that: be made up of triethanolamine and activator, and described activator is the organic amine absorbent containing primary amine or secondary amine group in molecule.
2. serotonin absorbent as claimed in claim 1, is characterized in that: activator is respectively one or more mixtures in monoethanolamine MEA, piperazine PZ, N-(2-ethoxy) ethylenediamine AEEA, N-aminoethyl piperazine AEP.
3. the triethanolamine serotonin absorbent of capturing carbon dioxide gas as claimed in claim 1, is characterized in that: the mol ratio of triethanolamine and activator is 1 ~ 5:1.
4. the triethanolamine serotonin absorbent of capturing carbon dioxide gas as claimed in claim 1, is characterized in that: the mol ratio of triethanolamine and monoethanolamine is 1 ~ 2:1.
5. the triethanolamine serotonin absorbent of capturing carbon dioxide gas as claimed in claim 1, is characterized in that: the mol ratio of triethanolamine and N-aminoethyl piperazine is 1 ~ 2:1.
6. the triethanolamine serotonin absorbent of capturing carbon dioxide gas as claimed in claim 1, is characterized in that: the mol ratio of triethanolamine and N-aminoethyl piperazine is 3 ~ 5:1.
7. the triethanolamine serotonin absorbent of the capturing carbon dioxide gas of capturing carbon dioxide gas, is characterized in that: described organic amine composite absorber is obtained by mixing in the soluble end of described serotonin by the serotonin of capturing carbon dioxide gas and water.
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|---|---|---|---|
| CN201510648658.8A CN105289207A (en) | 2015-10-09 | 2015-10-09 | Triethanolamine compound amine absorbent for capturing carbon dioxide |
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| CN201510648658.8A CN105289207A (en) | 2015-10-09 | 2015-10-09 | Triethanolamine compound amine absorbent for capturing carbon dioxide |
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| CN111603892A (en) * | 2020-05-29 | 2020-09-01 | 中国华电科工集团有限公司 | Absorption liquid and preparation method and application thereof |
| CN113842749A (en) * | 2021-09-26 | 2021-12-28 | 武汉工程大学 | Alcohol amine and ionic liquid composite CO2Absorbent, preparation method and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111603892A (en) * | 2020-05-29 | 2020-09-01 | 中国华电科工集团有限公司 | Absorption liquid and preparation method and application thereof |
| CN113842749A (en) * | 2021-09-26 | 2021-12-28 | 武汉工程大学 | Alcohol amine and ionic liquid composite CO2Absorbent, preparation method and application thereof |
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Application publication date: 20160203 |