CN105561756A - Compound solvent used for gathering carbon dioxide and application thereof - Google Patents
Compound solvent used for gathering carbon dioxide and application thereof Download PDFInfo
- Publication number
- CN105561756A CN105561756A CN201410537642.5A CN201410537642A CN105561756A CN 105561756 A CN105561756 A CN 105561756A CN 201410537642 A CN201410537642 A CN 201410537642A CN 105561756 A CN105561756 A CN 105561756A
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- amino
- carbon dioxide
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- amine
- gas
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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
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- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to a gathering solvent used for gathering carbon dioxide in a low-concentration carbon dioxide gas source and a gathering method, belonging the technical field of gathering of carbon dioxide in gas. The solvent comprises 5 to 85 wt% of a solvent containing an amino group and an oxy-ether group, 1.5 to 70 wt% of alcohol amine and 5 to 80 wt% of water. The structural formula of the solvent containing the amino group and the oxy-ether group is NH2-R1-(O-CHR3-CH2)x-R2, wherein R1 and R2 are independently selected from a group consisting of an alkyl group, an alkyl group containing hydroxyl substituent, an alkyl group containing amino substituent, and an alkyl group containing both amino substituent and hydroxyl substituent, R3 is an alkyl group or hydrogen, and x is equal to 1 to 6. At a temperature of 10 to 80 DEG C, the solvent provided by the invention can be used for gathering carbon dioxide in a variety of low-concentration carbon dioxide sources like effluent gas from coal-fired boiler in a power plant, cement and limekiln gas, blast furnace gas and gas discharged by regeneration of a catalyst in an FCC apparatus of a refinery. The solvent has the advantages of great absorption capacity, a fast absorption rate, a high regeneration rate, high stability and the like and has good prospects in the field of large-scale carbon dioxide gathering.
Description
Technical field
The invention belongs to carbon dioxide in gas trapping technique field, relate to complex solvent and the application process of the carbon dioxide in a kind of capturing carbon dioxide source of the gas.
Background technology
The trapping of carbon dioxide has become " focus " problem of global concern.The trapping technique of carbon dioxide comprises solvent absorption, absorption method, low temperature processing, membrane separation process etc.Consider from trapping effect and running cost two aspect, adopt chemical absorption method to be the method that current collecting carbon dioxide from fuel gas cost is minimum.Chemical absorption method is the character utilizing carbon dioxide to be sour gas, absorbs with alkalescent material, and then heating makes its desorb, thus reaches and remove CO
2object.Typical chemical absorbent is organic alcohol amine solution.Organic alcohol amine method mainly comprises monoethanolamine (MEA) method, N methyldiethanol amine (MDEA) method, sterically hindered amines method etc.Form mixed amine by adopting two kinds of hydramine not at the same level the Dominant Facies of different amine to be combined for separating of trapping CO
2.Such as the high throughput of MDEA and low energy consumption can be made to combine with the high reaction rate of MEA MEA and MDEA mixing, thus improve CO
2processing procedure.Research at present for mixed amine is amine method CO
2the hot topic in trapping field.
Idem etc. points of safety pins adopt MEA-MDEA mixing method to carry out absorption CO to natural gas flue gas and coal-burning power plant's flue gas
2pilot plant test research.Compared with MEA process, MEA-MDEA composite absorber can significantly reduce energy consumption [IdemR, WilsonM, TontiwachwuthikulP, ChakmaA, VeawabA, AroonwilasA, GelowitzD.PilotPlantStudiesoftheCO2CapturePerformanceofA queousMEAandMixedMEA/MDEASolventsattheUniversityofRegina CO2CaptureTechnologyDevelopmentPlantandtheBoundaryDamCO2 CaptureDemonstrationPlant.Ind.Eng.Chem.Res., 2006, 45 (8): 2414-2420.].Environmental project research institute of Zhejiang University is to mixed amine method absorption from flue gas CO
2experimental study and mechanism discussion are carried out.They adopt the CO in MEA+MDEA, DETA (diethylenetriamine)+MDEA, TETA (triethylene tetramine)+MDEA mixed amine aqueous solution absorption simulated flue gas
2.Research shows, MEA+MDEA exists chemical reaction reciprocation; In MDEA, add a small amount of enamine DETA, TETA can improve CO
2absorption rate and capacity, and MEA and DEA that assimilation effect is better than commonly using [execute credit, Xiang Fei, Li Wei. CO in mixed amines absorption from flue gas
2the mechanism of interaction effect. China Environmental Science, 2003,23 (2): 201-205.].Zhang Yongchun seminar of Dalian University of Technology adopts AEE (the AEEA)-MDEA aqueous solution to CO
2carry out absorption and desorption.Experimental result shows, adopts AEE-MDEA mixed amine to significantly improve CO
2absorption rate and uptake.20%AEE-20%MDEA composite solution is to CO
2absorb with desorption effect all better, be applicable to the CO in trapping industrial waste gas
2[Cable, Mildred, Zhang Yongchun, Zhou Jinxia, Song Wei. the composite decarbonizing solution .CN200710011329.8 of trapping carbon dioxide in gas mixture].As can be seen from current result of study, the major advantage of mixed amine method the Dominant Facies of different amine can be combined for separating of trapping CO
2.But choosing the amine formation formula with different advantage makes various amine form mutual supplement with each other's advantages, thus raising arresting efficiency, reduction regeneration energy consumption are current research emphasis.
Summary of the invention
The object of the invention is to propose a kind of new and effective formula solvent for carbon dioxide in captured gas mixture and method.
Efficient trapping solvent of the present invention, comprises the compound, hydramine and the water that contain amino and ether oxygen base.Wherein, the content containing the solvent of amino and ether oxygen base is 5 ~ 85wt%, the content 1.5 ~ 70wt% of hydramine, the content 5 ~ 80wt% of water.
The structural formula containing the solvent of amino and ether oxygen base is NH
2-R
1-(O-CHR
3-CH
2)
x-R
2, wherein, R
1and R
2independently be selected from alkyl separately or contain the alkyl of hydroxyl replacement or contain the amino alkyl replaced or the alkyl simultaneously containing amino and hydroxyl replacement, R
3for alkyl or hydrogen, x=1 ~ 6.
Described amino-substituent is primary amine, secondary amine or tertiary amine group.Alkyl substituent is straight or branched.
Amino and ether oxygen base can interact respectively by chemistry and physical action and carbon dioxide, raising absorption efficiency, reduction regeneration energy consumption.
Hydramine is monoethanolamine, diethanol amine, triethanolamine, N methyldiethanol amine, 2-amino-2-methyl-1-propanol; And hydramine is all not limited to above-mentioned several, can be wherein any one or multiple.At least one in compound containing direct-connected primary amine and ether oxygen base or the compound containing secondary amine and ether oxygen base and triethanolamine, N methyldiethanol amine, 2-amino-2-methyl-1-propanol is composite.At least one in the compound of the primary amine containing space steric effect and ether oxygen base or the compound containing tertiary amine and ether oxygen base and monoethanolamine, diethanol amine is composite.
Be 10 DEG C ~ 80 DEG C in temperature, absorbent of the present invention can be used for the carbon dioxide of the various low concentration of carbon dioxide emission source discharge such as capturing power plant discharged from coal-fired boiler gas, cement and lime-kiln gas, blast furnace gas, refinery's FCC apparatus catalyst regeneration discharge gas.
Make the carbon dioxide in air-flow by with formula solvent contacts of the present invention and being removed, any known equipment in this area may be used to absorb, regeneration and other step.
Absorbent of the present invention has that absorptive capacity is large, absorption rate and the advantage such as regeneration rate is fast, regeneration energy consumption is low, therefore has good prospect in extensive collecting carbonic anhydride field.
Detailed description of the invention
The present invention is illustrated by the following examples, but the present invention is not limited to following embodiment.Under the scope not departing from the described aim in front and back, change is included in technical scope of the present invention.
Embodiment 1
By 27.5gH
2n-CH (CH
3)-(O-CH
2-CH
2)
3-CH (CH
3) NH
2after mixing with 7.64g monoethanolamine, deionized water is adopted to be settled to 100mL system.Measure absorbent 10mL as in an absorption bottle, absorption bottle, as in 30 DEG C of waters bath with thermostatic control, passes into CO with the speed of 10mL/min in absorption bottle
2gas, weighs absorption bottle weight at set intervals, and absorption bottle weight no longer changes and can be considered that absorption reaches balance.The final CO absorbed
2for 1.45g.System after absorbing regenerated at 100 DEG C, regeneration rate is 94.54%.
Embodiment 2
By 22.20gH
2n-CH
2-(O-CH
2-CH
2)
2-CH
2nH
2and 8.92g2-amino-2-methyl-1-propyl alcohol is settled to 100mL with deionized water.Measure absorbent 10mL as in an absorption bottle, absorption bottle, as in 40 DEG C of waters bath with thermostatic control, passes into CO with the speed of 10mL/min in absorption bottle
2gas, weighs absorption bottle weight at set intervals, and absorption bottle weight no longer changes and can be considered that absorption reaches balance.The final CO absorbed
2for 1.53g.System after absorbing is regenerated 60min at 100 DEG C, and regeneration rate is 78.91%.
Embodiment 3
By 25.6gCH
3-HN-CH
2-(O-CH
2-CH
2)
2-CH
2nH-CH
3with 11.1g2-amino-2-methyl-1-propyl alcohol, deionized water is adopted to be settled to 100mL system.Measure absorbent 10mL as in an absorption bottle, absorption bottle, as in 30 DEG C of waters bath with thermostatic control, passes into CO with the speed of 10mL/min in absorption bottle
2gas, weighs absorption bottle weight at set intervals, and absorption bottle weight no longer changes and can be considered that absorption reaches balance.The final CO absorbed
2for 1.52g.System after absorbing regenerated at 100 DEG C, regeneration rate is 80.03%.
Embodiment 4
By 33.5gH
2n-CHOH-(O-CH
2-CH
2)
4-CHOHNH
2with 14.9gN-methyl diethanolamine, be settled to 100mL with deionized water.Measure absorbent 10mL as in an absorption bottle, absorption bottle, as in 30 DEG C of waters bath with thermostatic control, passes into CO with the speed of 10mL/min in absorption bottle
2gas, weighs absorption bottle weight at set intervals, and absorption bottle weight no longer changes and can be considered that absorption reaches balance.The final CO absorbed
2for 0.84g.System after absorbing regenerated at 100 DEG C, regeneration rate is 80.39%.
Embodiment 5
By 84.55gH
2n-CHOH-(O-CH
2-CH
2)
6-CHOHNH
2with 9.32g triethanolamine, be settled to 100mL with deionized water.Measure absorbent 10mL as in an absorption bottle, absorption bottle, as in 30 DEG C of waters bath with thermostatic control, passes into CO with the speed of 10mL/min in absorption bottle
2gas, weighs absorption bottle weight at set intervals, and absorption bottle weight no longer changes and can be considered that absorption reaches balance.The final CO absorbed
2for 1.37g.System after absorbing regenerated at 100 DEG C, regeneration rate is 71.55%.
Embodiment 6
By 5.10g (CH
3)
2-N-CH
2-(O-CH
2-CH
2)
2-CH
2n-(CH
3)
2after mixing with 34.06g diethanol amine, deionized water is adopted to be settled to 100mL system.Measure absorbent 10mL as in an absorption bottle, absorption bottle, as in 30 DEG C of waters bath with thermostatic control, passes into CO with the speed of 10mL/min in absorption bottle
2gas, weighs absorption bottle weight at set intervals, and absorption bottle weight no longer changes and can be considered that absorption reaches balance.The final CO absorbed
2for 1.15g.System after absorbing regenerated at 100 DEG C, regeneration rate is 70.15%.
Embodiment 7
By 52.65H
2n-CH (CH
3)-(O-CH (CH
3)-CH
2)
3-CH (CH
3) NH
2after mixing with 1.53g monoethanolamine, deionized water is adopted to be settled to 100mL system.Measure absorbent 10mL as in an absorption bottle, absorption bottle, as in 30 DEG C of waters bath with thermostatic control, passes into CO with the speed of 10mL/min in absorption bottle
2gas, weighs absorption bottle weight at set intervals, and absorption bottle weight no longer changes and can be considered that absorption reaches balance.The final CO absorbed
2for 1.65g.System after absorbing regenerated at 100 DEG C, regeneration rate is 84.54%.
Embodiment 8
By 7.50gH
2n-CHOH-(O-CH
2-CH
2)
4-CHOHNH
2with 69.45g triethanolamine, be settled to 100mL with deionized water.Measure absorbent 10mL as in an absorption bottle, absorption bottle, as in 30 DEG C of waters bath with thermostatic control, passes into CO with the speed of 10mL/min in absorption bottle
2gas, weighs absorption bottle weight at set intervals, and absorption bottle weight no longer changes and can be considered that absorption reaches balance.The final CO absorbed
2for 0.74g.System after absorbing regenerated at 100 DEG C, regeneration rate is 83.39%.
Embodiment 9
By 11.00gH
2n-CH (CH
3)-(O-CH
2-CH
2)
3-CH (CH
3) NH
2, after 7.64g monoethanolamine mixes with 6.69g2-amino-2-methyl-1-propyl alcohol, adopt deionized water to be settled to 100mL system.Measure absorbent 10mL as in an absorption bottle, absorption bottle, as in 30 DEG C of waters bath with thermostatic control, passes into CO with the speed of 10mL/min in absorption bottle
2gas, weighs absorption bottle weight at set intervals, and absorption bottle weight no longer changes and can be considered that absorption reaches balance.The final CO absorbed
2for 1.78g.System after absorbing regenerated at 100 DEG C, regeneration rate is 94.44%.
Comparative example
Deionized water is adopted to be settled to 100mL 15.3gMEA.Measure absorbent 10mL as in an absorption bottle, absorption bottle, as in 30 DEG C of waters bath with thermostatic control, passes into CO with the speed of 10mL/min in absorption bottle
2gas, weighs absorption bottle weight at set intervals, and absorption bottle weight no longer changes and can be considered that absorption reaches balance.The final CO absorbed
2for 0.65g.System after absorbing regenerated at 100 DEG C, regeneration rate is 64.41%.
From the result of above embodiment and comparative example, adopt novel trapping solvent of the present invention, the MEA process more traditional to the uptake of carbon dioxide, absorption rate and regeneration rate all increases substantially.
Claims (10)
1., for a complex solvent for capturing carbon dioxide, it is characterized in that comprising the compound, hydramine and the water that contain amino and ether oxygen base; The content containing the compound of amino and ether oxygen base is 5 ~ 85wt%, the content 1.5 ~ 70wt% of hydramine, the content 5 ~ 80wt% of water.
2. solvent according to claim 1, is characterized in that the structural formula of the compound containing amino and ether oxygen base is NH
2-R
1-(O-CHR
3-CH
2)
x-R
2, wherein, R
1and R
2independently be selected from alkyl separately or contain the alkyl of hydroxyl replacement or contain the amino alkyl replaced or the alkyl simultaneously containing amino and hydroxyl replacement, R
3for alkyl or hydrogen, x=1 ~ 6.
3. solvent according to claim 1, is characterized in that the described amino-substituent containing the compound of amino and ether oxygen base is primary amine, secondary amine or tertiary amine group.
4. solvent according to claim 1, is characterized in that the described alkyl substituent containing the compound of amino and ether oxygen base is straight or branched.
5. solvent according to claim 1, it is characterized in that hydramine be monoethanolamine, diethanol amine, triethanolamine, N methyldiethanol amine, 2-amino-2-methyl-1-propanol any one or multiple.
6. solvent according to claim 1 and 2, is characterized in that at least one in compound containing straight chain primary amine and ether oxygen base or the compound containing secondary amine and ether oxygen base and triethanolamine, N methyldiethanol amine, 2-amino-2-methyl-1-propanol is composite.
7. solvent according to claim 1 and 2, is characterized in that at least one in the compound of primary amine containing space steric effect and ether oxygen base or the compound containing tertiary amine and ether oxygen base and monoethanolamine, diethanol amine is composite.
8. the application of solvent according to claim 1, is characterized in that the CO of complex solvent by trapping wherein with air flow contacts
2.
9. application according to claim 8, is characterized in that the temperature of capturing carbon dioxide is 10 DEG C ~ 80 DEG C.
10. application according to claim 8, is characterized in that the CO trapping low concentration in emission source
2, comprise coal-fired boiler in power plant discharge gas, cement and lime-kiln gas, blast furnace gas, refinery's FCC apparatus catalyst regeneration discharge gas.
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| CN201410537642.5A CN105561756A (en) | 2014-10-11 | 2014-10-11 | Compound solvent used for gathering carbon dioxide and application thereof |
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|---|---|---|---|
| CN201410537642.5A CN105561756A (en) | 2014-10-11 | 2014-10-11 | Compound solvent used for gathering carbon dioxide and application thereof |
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|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109569194A (en) * | 2017-09-29 | 2019-04-05 | 中国石油化工股份有限公司 | It is a kind of for trapping the ionic liquid of carbon dioxide |
| CN115228247A (en) * | 2022-08-15 | 2022-10-25 | 北京石大油源科技开发有限公司 | Technological method and process suitable for capturing high-concentration carbon dioxide |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1354036A (en) * | 2001-10-30 | 2002-06-19 | 南化集团研究院 | Compound amine solvent for recovering low fractional pressure carbon dioxide |
| CN101394913A (en) * | 2006-03-06 | 2009-03-25 | 犹德有限公司 | Solvent for separating acid gas components from technical gases |
| WO2012058050A1 (en) * | 2010-10-29 | 2012-05-03 | Huntsman Petrochemical Llc | Use of 2-(3-aminopropoxy)ethan-1-ol as an absorbent to remove acidic gazes |
-
2014
- 2014-10-11 CN CN201410537642.5A patent/CN105561756A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1354036A (en) * | 2001-10-30 | 2002-06-19 | 南化集团研究院 | Compound amine solvent for recovering low fractional pressure carbon dioxide |
| CN101394913A (en) * | 2006-03-06 | 2009-03-25 | 犹德有限公司 | Solvent for separating acid gas components from technical gases |
| WO2012058050A1 (en) * | 2010-10-29 | 2012-05-03 | Huntsman Petrochemical Llc | Use of 2-(3-aminopropoxy)ethan-1-ol as an absorbent to remove acidic gazes |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109569194A (en) * | 2017-09-29 | 2019-04-05 | 中国石油化工股份有限公司 | It is a kind of for trapping the ionic liquid of carbon dioxide |
| CN109569194B (en) * | 2017-09-29 | 2022-04-15 | 中国石油化工股份有限公司 | Ionic liquid for capturing carbon dioxide |
| CN115228247A (en) * | 2022-08-15 | 2022-10-25 | 北京石大油源科技开发有限公司 | Technological method and process suitable for capturing high-concentration carbon dioxide |
| CN115228247B (en) * | 2022-08-15 | 2023-08-22 | 北京石大油源科技开发有限公司 | Technological method and process suitable for capturing high-concentration carbon dioxide |
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Application publication date: 20160511 |
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