CN104415653A - Capture solvent used for capturing low-concentration carbon dioxide - Google Patents
Capture solvent used for capturing low-concentration carbon dioxide Download PDFInfo
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- CN104415653A CN104415653A CN201310396871.5A CN201310396871A CN104415653A CN 104415653 A CN104415653 A CN 104415653A CN 201310396871 A CN201310396871 A CN 201310396871A CN 104415653 A CN104415653 A CN 104415653A
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- carbon dioxide
- amino
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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)
Abstract
The invention belongs to the technical field of carbon dioxide in gases and relates to an absorbent and a method for capturing carbon dioxide in a low-concentration carbon dioxide gas source. A capture solvent is composed of a composition simultaneously containing an amino and an ether oxygroup, and water, the structural formula of the composition simultaneously containing the amino and the ether oxygroup is NH2-R1-(CH2-O-CH2)x-R2, wherein R1 and R2 are independently selected from an alkyl, or a substituted alkyl containing a hydroxyl, or a substituted alkyl containing an amino, or an alkyl simultaneously containing an amino and a hydroxyl, and x is equal to 1-6. At the temperature of 10-80 DEG C, and the absorbent provided by the invention can be used for capturing carbon dioxide emitted from various low-concentration carbon dioxide gas sources such as exhaust gases of coal-fired boilers in power plants, cement and lime kiln gases, blast furnace gases, regenerative exhaust gases of FCC device catalysts in refinery plants. The absorbent provided by the invention has the advantages of large absorption capacity, high absorption rate, high regeneration rate, high stability and the like, and thus the absorbent has a very good prospect in the field of large-scale carbon dioxide capture.
Description
Technical field
The invention belongs to carbon dioxide in gas trapping technique field, relate to a kind of absorbent and method of the carbon dioxide trapped in low concentration of carbon dioxide source of the gas.
Background technology
CO
2a large amount of discharges cause global warming, exacerbate greenhouse effects, the emission control of carbon dioxide is more and more paid attention in the extreme weather countries in the world that take place frequently.Along with the signing of Kyoto Protocol and holding of Copenhagen global climate summit, countries in the world pay attention to research and development and the industrialization of carbon dioxide discharge-reduction technology more, and 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.Physical solvent is as low in the regeneration energy consumption of NHD to carbon dioxide, but poor to the absorbability of carbon dioxide, cannot meet the CO such as flue gas
2trapping requirement under the lower operating mode of dividing potential drop.Because dividing of carbon dioxide in flue gas is forced down, at present, the method being suitable for smoke carbon dioxide capture is mainly chemical absorption method.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 By Amine Solutions.Amine process mainly comprises monoethanolamine (MEA) method, N methyldiethanol amine (MDEA) method, sterically hindered amines method, mixed amine method etc., its major advantage is that infiltration rate is fast, degree of purification is high, recovery rate of CO 2 is high, absorption pressure is little on the impact of absorbability, is therefore suitable for the trapping of the low fractional pressure carbon dioxide such as flue gas, limekiln discharge gas.
A kind of use that discloses US Patent No. 20080159937A1 contains the tertiary alkanolamine solution of vinylamine promoter as carbon dioxide absorbent solution, the method for separating carbon dioxide from mist.The amino-acid salt aqueous solution that US20090320682A1 discloses tertiary-amino-containing is main absorbent, and primary amine such as 4-amino butanol etc. is the new combustion waste gas CO of activator
2trapping solvent.Patent 200810113147.3 adopts normal propyl alcohol amine aqueous solution as the absorbent of carbon dioxide.Because the atomicity between the amino of normal propyl alcohol amine and hydroxyl is 3, in normal propyl alcohol amine and protonated molecular structure thereof, H atom on atom N and O atom, or the H atom in O atom and atom N forms hydrogen bond, can be formed by six former molecular circuluses, atom N is connected with two side chains, one of them is by means of the connection of hydrogen bond, such molecular structure and secondary amine similar, the formation of amino-carbon hydrochlorate can be reduced, then improve solubility and the desorb degree of carbon dioxide.Simultaneously due to the formation of six-membered cyclic molecular structure, improve the stability of molecule, solvent degraded loss in use can be reduced.
But above technology still exists, and trapping solvent regeneration energy consumption is large, solvent is urgently to be resolved hurrily to the not high key issue of carbon dioxide absorption efficiency in cyclic process.
Summary of the invention
The object of the invention is to propose a kind of for the especially New Absorbent of carbon dioxide in flue gas and method in captured gas mixture.
Efficient trapping solvent of the present invention is made up of the compound and water containing amino and ether oxygen base simultaneously.
Amino is combined the speed can accelerating capturing carbon dioxide with carbon dioxide chemistry, the Physical interaction between ether oxygen base and carbon dioxide facilitates carbon dioxide regenerability greatly, reduces regeneration energy consumption.The combination of these two kinds of groups, can make the absorbent properties of this trapping solvent and power of regeneration compared with prior art, tool increases significantly.
Usually, described trapping solvent is made up of the compound and water containing amino and ether oxygen base simultaneously, and the mass concentration containing the compound of amino and ether oxygen base is 15 ~ 90wt%, and the mass concentration of water is 10 ~ 85wt%.
Containing structural formula of compound that is amino and ether oxygen base be
NH
2-R
1-(CH
2-O-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, x=1 ~ 6.
Described amino-substituent is primary amine, secondary amine or tertiary amine group.
Described alkyl substituent can be straight chain, also can be side chain.
Described trapping solvent, to be used alone, also can use with other solvent complexes.
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 being removed containing amino contact with the absorbent of ether oxygen base with of the present invention, any known equipment in this area may be used to absorption, regeneration and other step.
Absorbent of the present invention has the advantages such as absorptive capacity is large, absorption rate fast, regeneration rate, stability are high, 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 37.0g H
2n-CH
2-(CH
2-O-CH
2)
2-CH
2nH
2100mL is settled to 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 1.46g.System after absorbing is regenerated 60min at 100 DEG C, and regeneration rate is 67.07%.
Embodiment 2
By 67.0g H
2n-CHOH-(CH
2-O-CH
2)
4-CHOHNH
2, 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 1.52g.System after absorbing regenerated at 100 DEG C, regeneration rate is 71.43%.
Embodiment 3
By 55.0g H
2n-CH (CH
3)-(CH
2-O-CH
2)
3-CH (CH
3) NH
2, system adopted deionized water to be settled to 100 mL.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 1.89g.System after absorbing regenerated at 100 DEG C, regeneration rate is 82.10%.
Embodiment 4
By 15.0g H
2n-CH
2-(CH
2-O-CH
2)
2-CH
2nH
2100mL is settled to 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 0.72g.System after absorbing is regenerated 60min at 100 DEG C, and regeneration rate is 69.07%.
Embodiment 5
By 89.0g H
2n-CHOH-(CH
2-O-CH
2)
6-CHOHNH
2, 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 1.47g.System after absorbing regenerated at 100 DEG C, regeneration rate is 66.11%.
Embodiment 6
By 51.3g CH
3-HN-CH (CH
3)-(CH
2-O-CH
2)
3-CH (CH
3)-NH-CH
3, system adopted deionized water to be settled to 100 mL.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 1.74g.System after absorbing regenerated at 100 DEG C, regeneration rate is 75.03%.
Embodiment 7
By 51.0g (CH
3)
2-N-CH
2-(CH
2-O-CH
2)
2-CH
2n-(CH
3)
2, system adopted deionized water to be settled to 100 mL.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 1.33g.System after absorbing regenerated at 100 DEG C, regeneration rate is 84.18%.
Comparative example
Deionized water is adopted to be settled to 100 mL 15.3g MEA.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 (9)
1., for trapping a trapping solvent for low concentration of carbon dioxide, it is characterized in that trapping solvent is made up of the compound and water containing amino and ether oxygen base simultaneously.
2. solvent according to claim 1, it is characterized in that the mass concentration of the compound containing amino and ether oxygen base is 15 ~ 90wt%, the mass concentration of water is 10 ~ 85wt%.
3. 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-(CH
2-O-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, x=1 ~ 6.
4. solvent according to claim 3, is characterized in that described amino-substituent is primary amine, secondary amine or tertiary amine group.
5. solvent according to claim 3, is characterized in that described alkyl substituent is straight chain.
6. solvent according to claim 3, is characterized in that described alkyl substituent is side chain.
7. the application process of trapping solvent according to claim 1 and 2, is characterized in that the temperature of capturing carbon dioxide is 10 DEG C ~ 80 DEG C.
8. the application process of trapping solvent according to claim 1 and 2, 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.
9. the application process of trapping solvent according to claim 1 and 2, is characterized in that the CO of trapping solvent by removing wherein with air flow contacts
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310396871.5A CN104415653A (en) | 2013-09-04 | 2013-09-04 | Capture solvent used for capturing low-concentration carbon dioxide |
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|---|---|---|---|
| CN201310396871.5A CN104415653A (en) | 2013-09-04 | 2013-09-04 | Capture solvent used for capturing low-concentration carbon dioxide |
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| CN104415653A true CN104415653A (en) | 2015-03-18 |
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032124A (en) * | 2015-07-03 | 2015-11-11 | 南京林业大学 | Alcohol ether amine gas purifying preparation and applications thereof |
| CN107051122A (en) * | 2017-06-03 | 2017-08-18 | 王丽燕 | A kind of alcamines combination of acidic gas purifying agent and its application |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103897A (en) * | 1985-05-06 | 1987-10-14 | 南京化学工业公司研究院 | The polyalcohol ether physical solvent removes sulfide and carbon dioxide in the gas |
| US5273679A (en) * | 1986-10-30 | 1993-12-28 | Toho Kagaku Kogyo Co., Ltd. | Stabilizers for compositions for acid gas absorbent |
| US20080025893A1 (en) * | 2004-03-09 | 2008-01-31 | Basf Aktiengesellschaft | Method For The Removal Of Carbon Dioxide From Gas Flows With Low Carbon Dioxide Partial Pressures |
| CN101417200A (en) * | 2007-10-22 | 2009-04-29 | 辽河石油勘探局 | Carbon dioxide, nitrogen gas recovering method in boiler flue gas |
-
2013
- 2013-09-04 CN CN201310396871.5A patent/CN104415653A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103897A (en) * | 1985-05-06 | 1987-10-14 | 南京化学工业公司研究院 | The polyalcohol ether physical solvent removes sulfide and carbon dioxide in the gas |
| US5273679A (en) * | 1986-10-30 | 1993-12-28 | Toho Kagaku Kogyo Co., Ltd. | Stabilizers for compositions for acid gas absorbent |
| US20080025893A1 (en) * | 2004-03-09 | 2008-01-31 | Basf Aktiengesellschaft | Method For The Removal Of Carbon Dioxide From Gas Flows With Low Carbon Dioxide Partial Pressures |
| CN101417200A (en) * | 2007-10-22 | 2009-04-29 | 辽河石油勘探局 | Carbon dioxide, nitrogen gas recovering method in boiler flue gas |
Non-Patent Citations (2)
| Title |
|---|
| 万鑫主编: "《燃料添加剂基础与应用技术》", 30 June 2012, article "聚醚胺" * |
| 张新华: "低温液体材料吸附二氧化碳的研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》, no. 10, 15 October 2011 (2011-10-15), pages 027 - 388 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032124A (en) * | 2015-07-03 | 2015-11-11 | 南京林业大学 | Alcohol ether amine gas purifying preparation and applications thereof |
| CN107051122A (en) * | 2017-06-03 | 2017-08-18 | 王丽燕 | A kind of alcamines combination of acidic gas purifying agent and its application |
| 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 |
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Application publication date: 20150318 |