CN108722116A - A kind of inorganic salt type carbon-dioxide absorbent - Google Patents
A kind of inorganic salt type carbon-dioxide absorbent Download PDFInfo
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- CN108722116A CN108722116A CN201710251557.6A CN201710251557A CN108722116A CN 108722116 A CN108722116 A CN 108722116A CN 201710251557 A CN201710251557 A CN 201710251557A CN 108722116 A CN108722116 A CN 108722116A
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- absorbent
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- ionic liquid
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/102—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/204—Amines
- B01D2252/20436—Cyclic amines
- B01D2252/20473—Cyclic amines containing an imidazole-ring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/204—Amines
- B01D2252/20494—Amino acids, their salts or derivatives
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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
-
- 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 present invention relates to a kind of inorganic salt type carbon-dioxide absorbents, belong to gas separation or field of purification.Absorbent composition includes amino-acid salt, ionic liquid, ammonium hydroxide, stabilizer.The amino-acid salt is the sylvite or sodium salt of amino acid, ionic liquid fusing point>- 15 DEG C, system viscosity（40℃）<20 centipoises, mass content 10%-45%.Using the extremely low vapour pressure of inorganic salts absorbent operating cost is substantially reduced to reduce its running volatilizing loss.In addition the absorbent is environmental-friendly, is not susceptible to degrade, greatly prolongs service life, is suitble to kinds of gas sources, even equally effective to the higher carbon dioxide air source of oxygen content.
Description
Technical field
The present invention relates to a kind of inorganic salt type carbon-dioxide absorbents, belong to gas separation or field of purification.Absorbent master
To include amino-acid salt, ionic liquid, ammonium hydroxide, stabilizer etc..This absorbent is not degradable, operation volatilizing loss is small, environment is friendly
The advantages that good, and the industry trapping dress that there is preferable collecting carbonic anhydride performance to be suitable for a variety of carbon dioxide air sources simultaneously
It sets.
Background technology
With the further development of human society, CO in global range2It is a large amount of discharge lead to greenhouse effects and extreme day
Gas takes place frequently, and has caused the great attention of national governments.The CO in China in 20152Nearly 8,000,000,000 tons of discharge capacity, accounts for Global emissions total amount
The 1st, the worlds 25%, Yi Ju.The sustainable growth used for Sinopec fuel and CO2Emission reduction requires the contradiction of the two,
Under the guiding of Chinese Government, in addition to formulating a variety of CO2Except emission reduction, policies laws regulation, advanced emission-reduction technology is opened
Hair application is also extremely urgent.
Currently, amine process trapping and recovering carbon dioxide is industrially to apply one of main, most successful method.
If Chinese patent ZL 01134103.3-recycles the compound amine solvent of low fractional pressure carbon dioxide, open one kind is with MEA
Based on organic amine absorbent.And think the absorbent to CO2Absorbability is big, and absorption, desorption rate are fast, and regeneration energy consumption is low,
Solvent does not corrode equipment substantially, and amine degradation is little.Herein between front and back more than 20 years, the various absorbents based on hydramine are successive
Studied and exploitation, effective absorbent components are also essentially MEA, MEDA, AMP, AEEA, PZ etc..
But there are still the problems such as degradable, steam loss, unfriendly environment under oxygen and heat effect to exist for organic amine.
Therefore it develops a kind of not degradable, environmental-friendly absorbent and also becomes numerous researchers emphasis of interest.
Wherein amino-acid salt carbon-dioxide absorbent is the carbon-dioxide absorbent of a kind of novel green, is absorbed with hydramine
Agent is compared, and has the characteristics that inoxidizability is strong, non-volatile, environmental hazard is small.Industrial applications are carried out with very high potential.Mesh
The preceding industrial applications for only having Siemens in the world and having grasped the technology, 2009, in patent CN102245278A and CN
Absorbent is disclosed in 102089062 A respectively and recycles the device of carbon dioxide.And the absorbent disclosed in it includes trip
Isolated amino acid exists to play the role of reducing regeneration energy consumption.But in fact, this method, which exists simultaneously absorbent, is easy knot
Brilliant and small solubility problem.
Invention content
Present invention aims at propose a kind of inorganic salt type carbon-dioxide absorbent.It is easy to solve traditional organic amine absorbent
Degradation, the problems such as running wastage is big, environment is unfriendly, this absorbent cost is relatively low in addition, is suitble to containing CO2Various air sources.
The technical problem to be solved in the present invention is to propose a kind of inorganic salt type carbon-dioxide absorbent, to realize the traditional organic amine of solution
The problems such as absorbent is degradable, running wastage is big, environment is unfriendly.
Present invention solves the technical problem that used scheme is：Absorbent composition includes amino-acid salt, ionic liquid, ammonia
Water, stabilizer.
The amino-acid salt is the sylvite or sodium salt of amino acid, and wherein amino acid group becomes alanine, sarcosine, 2- methyl
One or more of in alanine, tarine, mass content 10%-40%, the component plays main absorption in absorbent
CO2Effect, and anti-degradation capability is strong, and salting liquid vapour pressure is almost nil in addition, and running wastage is also minimum.
The ionic liquid fusing point>- 15 DEG C, system viscosity（40℃）<20 centipoises, mass content 10%-45%, the component
The effect for primarily serving solvent, can significantly reduce CO2The latent heat of vaporization of solvent in regenerative process is lost, suitable ionic liquid
Such as one or more of 1- butyl -3- methylimidazole tetrafluorides boron salt, 1- ethyl-3-methylimidazole acetates etc..
The ammonium hydroxide mass content 0.8%-8%, the component play assist absorption CO2Effect, and promoted absorbent Regenerated energy
Power.
The stabilizer mass content 0.05%-5%, the component play the role of reducing ammonium hydroxide volatilization.
Effect and benefit of the present invention are to propose a kind of inorganic salt type carbon-dioxide absorbent.Utilize inorganic salts absorbent
Extremely low vapour pressure substantially reduces operating cost to reduce its running volatilizing loss.In addition absorbent environment friend
It is good, it is not susceptible to service life of degrading, greatly prolong, is suitble to kinds of gas sources, even to the higher carbon dioxide of oxygen content
Air source is equally effective.
Specific implementation mode
The inorganic salt type absorbent further illustrated the present invention below by example is in running wastage, trapping ability etc.
On feature, but the protection domain of this patent and should not be limited by the examples.
Following embodiment is the typical process of carbon dioxide capture device：Contain CO2Flue gas（Unstripped gas）Into absorption
Tower, a portion CO2By solvent absorption, purified gas is discharged into air by tower top（During this purified gas is discharged, absorb
Agent can also be taken out of in the form of steam or droplet）.Absorb CO2Rich solution afterwards is by bottom of tower through poor rich liquid heat exchanger, recycling heat
Regenerator is sent into after amount.The CO desorbed2It is separated off moisture after being cooled down together with vapor, obtains the products C O of high-purity2Gas.
The condensed water separated that is condensed in regeneration gas enters regenerator.Rich solution enters from regenerator top, passes through vapour
Carry desorption part CO2, subsequently into reboiler, make CO therein2Further desorption.Desorb CO2Lean solution afterwards is by regenerator underflow
Go out, after poor rich liquid heat exchanger exchanges heat, with water cooler is pumped to, enters absorption tower after cooling.Solvent cyclic constitutes continuous
Absorption and desorption CO2Technical process.
Embodiment 1
Unstripped gas air inflow is 3.5Nm3, internal circulating load 12L/h, regeneration heating amount 30% or 35%, absorbent includes sarcosine potassium
2.3mol/L, ammonium hydroxide 0.2mol/L, cabaltous nitrate hexahydrate 2g/L, 1- butyl -3- methyl imidazolium tetrafluoroborate 1.6mol/L,
Yu Weishui.According to practical experience, wherein running wastage is mainly absorbent with that portion being pulled away in purified gas discharge process
The amount divided.Therefore measure basicity in purified gas condensate liquid（mol/L）, it is denoted as MOnly, trapping ability is with the capture rate under the same terms
Note.
As a result it see the table below 1.
Comparative example
Unstripped gas air inflow is 3.5 Nm3, internal circulating load 12L/h, regeneration heating amount 30% or 35%, absorbent includes monoethanolamine
2.5mol/L measures basicity in purified gas condensate liquid（mol/L）, it is denoted as MOnly, trapping ability is with the capture rate under the same terms
Note.
As a result it see the table below 1.
Embodiment 2
Unstripped gas air inflow is 3.5 Nm3, internal circulating load 12L/h, regeneration heating amount 30% or 35%, absorbent includes glycine potassium
2.2mol/L, ammonium hydroxide 0.3mol/L, cabaltous nitrate hexahydrate 2.5g/L, 1- butyl -3- methyl imidazolium tetrafluoroborate 1.6mol/L,
Remaining is water.According to practical experience, wherein running wastage be mainly absorbent be pulled away in purified gas discharge process that
Partial amount.Therefore measure basicity in purified gas condensate liquid（mol/L）, it is denoted as MOnly, trapping ability is with the capture rate under the same terms
To remember.As a result it see the table below 1：
Embodiment 3
Unstripped gas air inflow is 3.5 Nm3, internal circulating load 12L/h, regeneration heating amount 30% or 35%, absorbent includes glycine potassium
1.8mol/L, 2- methylalanine potassium 0.5mol/L, ammonium hydroxide 0.2mol/L, cabaltous nitrate hexahydrate 2g/L, 1- ethyl -3- methyl miaows
Zole acetic acid salt 2mol/L, remaining is water.According to practical experience, wherein running wastage is mainly absorbent with purified gas discharge process
The amount of middle be pulled away part.Therefore measure basicity in purified gas condensate liquid（mol/L）, it is denoted as MOnly, trapping ability is with identical
Under the conditions of capture rate remember.As a result it see the table below 1.
Embodiment 4
Unstripped gas air inflow is 3.5 Nm3, internal circulating load 12L/h, regeneration heating amount 30% or 35%, absorbent includes sarcosine potassium
1.8mol/L, 2- methylalanine potassium 0.4mol/L, ammonium hydroxide 0.3mol/L, cabaltous nitrate hexahydrate 2.5g/L, 1- ethyl -3- methyl
Imidazoleacetic acid salt 2mol/L, remaining is water.According to practical experience, wherein running wastage is mainly that absorbent was discharged with purified gas
The amount for the part being pulled away in journey.Therefore measure basicity in purified gas condensate liquid（mol/L）, it is denoted as MOnly, trapping ability is with phase
Capture rate under the conditions of is remembered.As a result it see the table below 1.
Embodiment 5
Unstripped gas air inflow is 3.5 Nm3, internal circulating load 12L/h, regeneration heating amount 30% or 35%, absorbent includes sarcosine potassium
2.5mol/L, 1- ethyl-3-methylimidazole acetate 2mol/L, remaining is water.According to practical experience, wherein running wastage is main
By absorbent with the amount for the part being pulled away in purified gas discharge process.Therefore measure basicity in purified gas condensate liquid（mol/
L）, it is denoted as MOnly, trapping ability remembered with capture rate under the same terms.As a result it see the table below 1.
1 decarbonization solvent effect of table
Obtained from upper table, embodiment 1,2,3,4 compared with comparative example 1, absorbent of the invention under the same conditions, capture rate
It is slightly good compared with MEA.From the basicity of purified gas condensate liquid（MOnly）It sees, absorbent of the invention ratio MEA reduces by more than 50, and substantially reduces
The running wastage of absorbent；In addition it can be seen that from embodiment 5 when not containing ammonium hydroxide in the present invention, the operation of absorbent
Some are lost more significantly to decline, only the 1/15 ~ 1/20 of MEA.This also illustrates simultaneously, and the amine loss in embodiment 1-4 is main
It is ammonium hydroxide, and ammonium hydroxide is relatively inexpensive.Therefore inorganic salt type absorbent can significantly reduce the damage of operation in the present invention
Consumption, more greatly reduces absorbent cost depletions.
Claims (8)
1. a kind of inorganic salt type carbon-dioxide absorbent, it is characterised in that absorbent composition includes amino-acid salt, ionic liquid, ammonia
Water, stabilizer.
2. absorbent according to claim 1, it is characterised in that the amino-acid salt is the sylvite or sodium salt of amino acid,
Middle amino acid group becomes one or more of alanine, sarcosine, 2- methylalanines, tarine.
3. absorbent according to claim 1, it is characterised in that the ionic liquid fusing point>System is viscous at -15 DEG C, 40 DEG C
Degree<20 centipoises.
4. absorbent according to claim 1, it is characterised in that the ionic liquid is 1- butyl -3- methylimidazole tetrafluoros
Change one or more of boron salt, 1- ethyl-3-methylimidazole acetates.
5. absorbent according to claim 1, it is characterised in that the ammonium hydroxide mass content 0.8%-8%.
6. absorbent according to claim 1, it is characterised in that the stabilizer mass content 0.05%-5%.
7. absorbent according to claim 1 or 2, it is characterised in that the amino-acid salt mass content is 10%-40%.
8. according to the absorbent described in claim 1,3 or 4, it is characterised in that the ionic liquid mass content is 10%-45%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710251557.6A CN108722116A (en) | 2017-04-18 | 2017-04-18 | A kind of inorganic salt type carbon-dioxide absorbent |
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| CN201710251557.6A CN108722116A (en) | 2017-04-18 | 2017-04-18 | A kind of inorganic salt type carbon-dioxide absorbent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112295366A (en) * | 2020-08-31 | 2021-02-02 | 中石化南京化工研究院有限公司 | Alpha-amino acid salt absorbent for capturing carbon dioxide |
| CN115253597A (en) * | 2022-06-30 | 2022-11-01 | 武汉工程大学 | Amino acid salt-ethylene glycol complex CO2Absorbent, preparation method and application thereof |
| CN116059791A (en) * | 2023-03-20 | 2023-05-05 | 中城院(北京)环境科技股份有限公司 | Capturing and drying CO in flue gas by using mixed ionic liquid 2 Method and apparatus of (a) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102099095A (en) * | 2008-05-21 | 2011-06-15 | 科罗拉多大学校董事会,法人 | Ionic liquids and methods for using the same |
| CN103282100A (en) * | 2010-09-09 | 2013-09-04 | 埃克森美孚研究工程公司 | Alkanolamine co2 scrubbing process |
-
2017
- 2017-04-18 CN CN201710251557.6A patent/CN108722116A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102099095A (en) * | 2008-05-21 | 2011-06-15 | 科罗拉多大学校董事会,法人 | Ionic liquids and methods for using the same |
| CN103282100A (en) * | 2010-09-09 | 2013-09-04 | 埃克森美孚研究工程公司 | Alkanolamine co2 scrubbing process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112295366A (en) * | 2020-08-31 | 2021-02-02 | 中石化南京化工研究院有限公司 | Alpha-amino acid salt absorbent for capturing carbon dioxide |
| CN115253597A (en) * | 2022-06-30 | 2022-11-01 | 武汉工程大学 | Amino acid salt-ethylene glycol complex CO2Absorbent, preparation method and application thereof |
| CN116059791A (en) * | 2023-03-20 | 2023-05-05 | 中城院(北京)环境科技股份有限公司 | Capturing and drying CO in flue gas by using mixed ionic liquid 2 Method and apparatus of (a) |
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Application publication date: 20181102 |