CN108926963A - A kind of method of anhydrous carbon-dioxide absorbent and absorption and desorption carbon dioxide - Google Patents
A kind of method of anhydrous carbon-dioxide absorbent and absorption and desorption carbon dioxide Download PDFInfo
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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
- 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
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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
- B01D53/1493—Selection of liquid materials for use as absorbents
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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 kind of methods of anhydrous carbon-dioxide absorbent and absorption and desorption carbon dioxide；A kind of anhydrous carbon-dioxide absorbent preparation method, comprising the following steps: amine is dissolved in methanol, stirs to being completely dissolved, obtains mixed solution；Hollow silica microsphere or porous silica microballoon are added in obtained mixed solution, continues to be stirred to react 2~8 hours, after reaction, is dried in vacuo, obtain amine improved silica microballoon；Amine improved silica microballoon is mixed with 2- [2- (dimethylamino) ethyoxyl] ethyl alcohol, obtains the anhydrous carbon-dioxide absorbent of amine improved silica microballoon emulsion form；Mass fraction range of the amine improved silica microballoon in absorbent are as follows: 5wt%~40wt%；Carbon dioxide absorption amount of the present invention is pure solid absorbent and more than 2 times of pure liquid absorbent uptake summation；It can be applicable to fossil-fuelled power-plants, cement plant, steel mill, in the high industry of the CO2 emissions such as oil plant.
Description
Technical field
The present invention relates to a kind of absorbents, and in particular to a kind of anhydrous carbon-dioxide absorbent and absorption and desorption carbon dioxide
Method.
Background technique
Carbon dioxide is considered as main greenhouse gases.Large scale mining and utilization with fossil energy, lead to two
Carbonoxide largely discharges, and exacerbates Global Greenhouse Effect, generates threat to human environment and existence, therefore titanium dioxide is effectively reduced
Carbon emission becomes research hotspot in recent years.
In order to reduce CO2 emissions, improves global climate and environment, ensures mankind's long term survival.China in 2009
Government promises to undertake on the World Climate Conference of Copenhagen, to the CO2 emission of the year two thousand twenty unit GDP than 2005
Decline 40%~45%.
International Energy Agency (IEA) and the Organization of Economy and Cooperation Development (OECD) data show, existing power plant's carbon dioxide year
About 10,600,000,000 tons of discharge amount, the 40.6% of whole world total emission volumn is accounted for, especially China's energy resource structure is based on coal, thermoelectricity hair
Electricity accounts for about the 80% of national generating capacity, is the highest industry of CO2 emission accounting.Currently, burning for coal-burning power plant
Trapping technique is one of the method for controlling CO2 emission most prospect afterwards.
In the prior art, common carbon capture material mainly has fluent material and solid porous material.
Amine Solutions are typical liquid carbon material for trapping, and especially ethanol amine (MEA) solution has uptake height, inhales
The advantages that rate is fast is received, is a kind of carbon dioxide absorption technique of relative maturity, there are about 60 years in industrialization titanium dioxide
Carbon capture history.But there is the problems such as easily decomposing loss, equipment seriously corroded, regeneration energy consumption is high in MEA solution.
Solid carbon material for trapping type is more, such as zeolite, metal oxide, metal organic framework etc..Due to low
The advantages that regeneration energy consumption, corrosion-free equipment, is also widely studied.However, solid carbon material for trapping industrialization application technology not at
It is ripe, liquid phase scrubbing method can not be substituted completely at present.Firstly, liquid absorbent can realize the weight of heat using the system that is thermally integrated
It is multiple to utilize.But the system of being thermally integrated cannot be efficiently used for solid-state, very low in the energy efficiency of carbon capture process.Secondly, solid material
Expect that continuous flow difficult to realize recycles, is not easy to extensive, continuous operation.
Therefore, exploitation has the advantages that low etc. the New Absorbent of uptake height, good cycling stability, regeneration energy consumption as mentioning
One of the trend of high carbon dioxide trapping technique.
Summary of the invention
Technical problem to be solved by the present invention lies in providing, a kind of uptake height, good cycling stability, regeneration energy consumption are low
The advantages that carbon-dioxide absorbent and absorption and desorption method.
In order to solve the above-mentioned technical problem, the technical scheme is that providing a kind of anhydrous carbon-dioxide absorbent system
Preparation Method, comprising the following steps:
A, amine is dissolved in methanol, stirs to being completely dissolved, obtains mixed solution；
B, hollow silica microsphere or porous silica microballoon are added in the mixed solution that step A is obtained, after
It is continuous to be stirred to react 2~8 hours, it after reaction, is dried in vacuo, obtains amine improved silica microballoon；
C, amine improved silica microballoon is mixed with 2- [2- (dimethylamino) ethyoxyl] ethyl alcohol, obtains amine modified two
The anhydrous carbon-dioxide absorbent of silicon oxide microsphere emulsion form；Mass fraction range of the amine improved silica microballoon in absorbent
Are as follows: 5wt%~40wt%.
A kind of further scheme of anhydrous carbon-dioxide absorbent preparation method according to the present invention, the amine is poly-
Close object amine or alkylamine.
A kind of further scheme of anhydrous carbon-dioxide absorbent preparation method according to the present invention, amine and titanium dioxide
Silicon microballoon or amine and porous silica microballoon are added in the ratio of 1:9~3:2.
A kind of further scheme of anhydrous carbon-dioxide absorbent preparation method according to the present invention, described hollow two
Silicon oxide microsphere is prepared as follows: polystyrene (PS) powder is added to ultrasonic disperse in the mixed solution of second alcohol and water
0.5~1.5h, then 1~2h of magnetic agitation at 25~70 DEG C, is subsequently added into a small amount of ammonium hydroxide；Then positive silicic acid second is added dropwise
Ester or tetraethyl orthosilicate after continuing to be stirred to react 2~3h at 25~70 DEG C, are centrifuged, clean and be dried in vacuo,
500 DEG C~700 DEG C calcining 3h~5h, obtain hollow silica microsphere；Wherein, polystyrene and ethyl orthosilicate or with original
The mass ratio of tetraethyl orthosilicate are as follows: 1:1.
A kind of further scheme of anhydrous carbon-dioxide absorbent preparation method according to the present invention, described porous two
Silicon oxide microsphere is prepared as follows: cetyl trimethylammonium bromide being added in the mixed solution of second alcohol and water ultrasonic
Disperse 0.5h, it is to be mixed to be added completely into a small amount of ammonium hydroxide.Then ethyl orthosilicate or tetraethyl orthosilicate is added dropwise, 25~
Continue to be stirred to react after 2~3h at 70 DEG C, be centrifuged, clean and be dried in vacuo, finally, 500 DEG C~700 DEG C calcining 3h~
5h obtains porous silica microballoon；Wherein, cetyl trimethylammonium bromide and ethyl orthosilicate or with orthosilicic acid tetrem
The mass ratio of ester are as follows: 1:3.
A kind of anhydrous carbon-dioxide absorbent of the present invention is by solid absorbent --- amine modified porous silica
The modified hollow silica microsphere of microballoon or amine and liquid absorbent --- 2- [2- (dimethylamino) ethyoxyl] ethyl alcohol is mutually tied
It closes, obtains a kind of New Absorbent for having both solid, liquid characteristic.It can be increased by solid absorbent and liquid absorbent synergistic effect
By force to the absorbability of carbon dioxide, its carbon dioxide absorption amount is that pure solid absorbent and pure liquid absorbent uptake are total
More than 2 times of sum.In the present invention, hollow silica microsphere and porous silica microballoon are stablized, and specific area is big, and surface is rich in
Hydroxyl is the excellent carrier of amino.Amino modified carbon dioxide enriched material has compared with high carbon dioxide uptake, low energy consumption,
With good carbon dioxide selectivity.
Second technical solution of the invention is: carrying out carbon dioxide absorption and desorption using anhydrous carbon-dioxide absorbent
Method, include the following steps:
Absorbent is placed in absorption kettle and carries out carbon dioxide absorption, the absorbent be amine improved silica microballoon with
2- [2- (dimethylamino) ethyoxyl] ethyl alcohol is mixed to get by the mass ratio of 1:20~3:2；After the completion of to be absorbed, to rich solution into
Row desorption；Specific desorption procedure are as follows: setting desorption temperature is 70~100 DEG C, when temperature to be absorbed reaches set temperature, by rich solution
It is introduced into desorption apparatus, desorption is stirred to rich solution at a constant temperature, while to desorption apparatus with the stream of 50~300mL/min
Amount is passed through nitrogen, and the variation of gas concentration lwevel is observed with single channel measurement and control instrument, show to its gas concentration lwevel close to 0 and
Think that desorption is completed after maintaining a period of time.
The amine improved silica microballoon is prepared as follows:
A, amine is dissolved in methanol, stirs to being completely dissolved, obtains mixed solution；
B, hollow silica microsphere or porous silica microballoon are added in the mixed solution that step A is obtained, after
It is continuous to be stirred to react 2~8 hours, it after reaction, is dried in vacuo, obtains amine improved silica microballoon.
The method according to the present invention that carbon dioxide absorption and desorption are carried out using carbon-dioxide absorbent into one
Step scheme, the amine are polymeric amine or alkylamine.
The method according to the present invention that carbon dioxide absorption and desorption are carried out using carbon-dioxide absorbent into one
Step scheme, amine and silicon dioxide microsphere or amine and porous silica microballoon press the proportional arrangement of 1:9~3:2.
The beneficial effect of a kind of method of carbon-dioxide absorbent and absorption and desorption carbon dioxide of the present invention is: this
The invention carbon-dioxide absorbent is by solid absorbent -- amine modified porous silica microballoon or amine are modified hollow dioxy
SiClx microballoon is with liquid absorbent -- and 2- [2- (dimethylamino) ethyoxyl] ethyl alcohol combines, has obtained one kind and had both solid, liquid
The New Absorbent of characteristic.The absorption energy to carbon dioxide can be enhanced by solid absorbent and liquid absorbent synergistic effect
Power, its carbon dioxide absorption amount are pure solid absorbent and more than 2 times of pure liquid absorbent uptake summation；Absorbent can
Absorption and desorption recycle, and regeneration energy consumption is low, and regeneration efficiency is high, and cycle efficieny is high, can be applicable to fossil-fuelled power-plants, water
Mud factory, steel mill, in the high industry of the CO2 emissions such as oil plant.
Detailed description of the invention
Fig. 1 is the flow diagram of carbon-dioxide absorbent preparation method of the present invention.
Fig. 2 is the absorption formation mechenism schematic diagram of carbon-dioxide absorbent prepared by the present invention.
Specific embodiment
A kind of anhydrous carbon-dioxide absorbent preparation method, comprising the following steps:
A, amine is dissolved in methanol, stirs to being completely dissolved, obtains mixed solution；
B, hollow silica microsphere or porous silica microballoon are added in the mixed solution that step A is obtained, after
It is continuous to be stirred to react 2~8 hours, it after reaction, is dried in vacuo, obtains amine improved silica microballoon；
C, amine improved silica microballoon is mixed with 2- [2- (dimethylamino) ethyoxyl] ethyl alcohol, obtains amine modified two
The anhydrous carbon-dioxide absorbent of silicon oxide microsphere emulsion form；Mass fraction range of the amine improved silica microballoon in absorbent
Are as follows: 5wt%~40wt%.
In a particular embodiment, the hollow silica microsphere is prepared as follows: by polystyrene (PS) powder
It is added to 0.5~1.5h of ultrasonic disperse in the mixed solution of second alcohol and water, then 1~2h of magnetic agitation at 25~70 DEG C, connects
A small amount of ammonium hydroxide is added；Then ethyl orthosilicate or tetraethyl orthosilicate is added dropwise, it is anti-to continue stirring at 25~70 DEG C
It after answering 2~3h, is centrifuged, cleans and be dried in vacuo.Finally, obtaining hollow titanium dioxide in 500 DEG C~700 DEG C calcining 3h~5h
Silicon microballoon；Wherein, polystyrene and ethyl orthosilicate or the mass ratio with tetraethyl orthosilicate are as follows: 1:1.
In a particular embodiment, the anhydrous carbon-dioxide absorbent preparation method of amine improved silica microballoon emulsion form,
Be characterized in that: the porous silica microballoon is prepared as follows: cetyl trimethylammonium bromide is added to ethyl alcohol
It is to be mixed to be added completely into a small amount of ammonium hydroxide with ultrasonic disperse 0.5h in the mixed solution of water.Then be added dropwise ethyl orthosilicate or
Person's tetraethyl orthosilicate after continuing to be stirred to react 2~3h at 25~70 DEG C, is centrifuged, cleans and be dried in vacuo, finally,
500 DEG C~700 DEG C calcining 3h~5h, obtain porous silica microballoon；Wherein, cetyl trimethylammonium bromide and positive silicic acid
Ethyl ester or mass ratio with tetraethyl orthosilicate are as follows: 1:3.
Referring to fig. 2, Fig. 2 is the absorption formation mechenism schematic diagram of present absorbent.It is micro- with amine modified porous silica
The anhydrous carbon-dioxide absorbent of ball emulsion form is briefly described: firstly, cetyl trimethylammonium bromide, ammonium hydroxide are added to
The solution B in microemulsion i.e. Fig. 2 is obtained in ethanol water, and solution A, that is, ethyl orthosilicate or tetraethyl orthosilicate is then added,
Ethyl orthosilicate or tetraethyl orthosilicate form silicon frame cladding even into arriving micro emulsion drop in ammonium hydroxide effect hydrolysis, polycondensation
In, form silicon ball body.Then, silicon ball body is centrifuged, is cleaned and is dried in vacuo, and high-temperature calcination removes template etc., shape
At cellular structure.Then, amine is carried out to silicon ball body to be modified.Finally, amine modified silicon sphere is distributed in organic solvent, this is obtained
Invention absorbent.
The method for carrying out carbon dioxide absorption and desorption using anhydrous carbon-dioxide absorbent, includes the following steps:
Absorbent is placed in absorption kettle and carries out carbon dioxide absorption, the absorbent be amine improved silica microballoon with
2- [2- (dimethylamino) ethyoxyl] ethyl alcohol is mixed to get by the mass ratio of 1:20~3:2；After the completion of to be absorbed, to rich solution into
Row desorption；Specific desorption procedure are as follows: setting desorption temperature is 70~100 DEG C, when temperature to be absorbed reaches set temperature, by rich solution
It is introduced into desorption apparatus, desorption is stirred to rich solution at a constant temperature, while to desorption apparatus with the stream of 50~300mL/min
Amount is passed through nitrogen, and the variation of gas concentration lwevel is observed with single channel measurement and control instrument, shows to its gas concentration lwevel close to zero
And think that desorption is completed after maintaining such as 1.5 hours a period of time.
The amine improved silica microballoon is prepared as follows:
A, amine is dissolved in methanol, stirs to being completely dissolved, obtains mixed solution；
B, hollow silica microsphere or porous silica microballoon are added in the mixed solution that step A is obtained, after
It is continuous to be stirred to react 2~8 hours, it after reaction, is dried in vacuo, obtains amine improved silica microballoon.
Embodiment 1:
A. as a comparison, weigh about 10mg amine modified porous silica microballoon and be put in Physical Absorption instrument, measure polyethylene
The uptake of imine modified porous silica microballoon.
B. as a comparison, weigh the pure liquid absorbent 2- of about 5g [2- (dimethylamino) ethyoxyl] ethyl alcohol and be placed in absorption kettle
In, it opens vacuum pump and system is vacuumized, when system holds vacuum state to be absorbed, close absorption system, lead into absorption kettle
Enter carbon dioxide to be absorbed, the pressure by measuring different moments absorption system works as suction come the carbon dioxide for the agent that is absorbed
It is absorbed when the pressure of receipts system remains unchanged in 30min and reaches balance.
C. it weighs absorbent of the invention about 5g to be placed in absorption kettle, the absorbent of invention uses the modified porous titanium dioxide of amine
Silicon microballoon and 2- [2- (dimethylamino) ethyoxyl] ethyl alcohol are that the ratio of 1:9 is mixed to get in mass ratio.Open vacuum pump pair
System vacuumizes, and when system holds vacuum state to be absorbed, closes absorption system, is passed through carbon dioxide into absorption kettle and is inhaled
It receives, by the pressure of measurement different moments absorption system come the amount of carbon dioxide for the agent that is absorbed, when the pressure of absorption system exists
It is absorbed when being remained unchanged in 30min~60min and reaches balance.
It is obtained through measurement, pure (2- [2- (dimethylamino) ethyoxyl] ethyl alcohol carbon dioxide absorption amount is 0.1532mmol/
G, the carbon dioxide absorption amount of polyethyleneimine-modified porous silica microballoon is 0.6589mmol/g, and amine modified porous two
Silicon oxide microsphere and 2- [2- (dimethylamino) ethyoxyl] ethyl alcohol are in mass ratio the dioxy of the 1:9 absorbent being mixed to get
Change carbon absorption amount is 0.4285mmol/g.The carbon dioxide absorption amount for illustrating present absorbent is that pure polyethyleneimine-modified is more
Hole silicon dioxide microsphere carbon dioxide absorption amount and it is pure (2- [2- (dimethylamino) ethyoxyl] ethyl alcohol carbon dioxide absorption amount it
2.1 times of sum.
I.e. 0.4285/ (0.1532 × 90%+0.6589 × 10%)=2.1
Embodiment 2:
Polyethyleneimine-modified absorbent PEI (600), diethylenetriamine modified absorbents DETA and ionic liquid are weighed respectively
Respectively about 5g carries out carbon dioxide absorption to modifies absorbent, can obtain through survey calculation, polyethyleneimine-modified absorbent, divinyl
The carbon dioxide absorption amount of triamine modified absorbents and ion liquid modified absorbent be respectively 0.5067mmol/g,
0.8875mmol/g and 0.4534mmol/g.
Embodiment 3:
The anhydrous carbon-dioxide absorbent of the modified hollow silica microsphere emulsion form of amine and amine modified porous two are weighed respectively
Respectively about 5g carries out carbon dioxide absorption to the anhydrous carbon-dioxide absorbent of silicon oxide microsphere emulsion form, obtains through survey calculation, amine changes
Property the anhydrous carbon-dioxide absorbent of porous silica microballoon emulsion form carbon dioxide absorption amount be 1.254mmol/g, be higher than
The carbon dioxide absorption amount 1.190mmol/g of the modified anhydrous carbon-dioxide absorbent of hollow silica microsphere emulsion form of amine.
From embodiment 2,3, it can be concluded that, the carbon dioxide absorption amount of present absorbent is higher than purely a modified in embodiment 2
The carbon dioxide absorption amount of absorbent.
Embodiment 4:
Absorbent is placed in absorption kettle and carries out carbon dioxide absorption, the absorbent be amine improved silica microballoon with
2- [2- (dimethylamino) ethyoxyl] ethyl alcohol is mixed to get by the mass ratio of 1:20~3:2；After the completion of to be absorbed, to rich solution into
Row desorption；Specific desorption procedure are as follows: setting desorption temperature is 70~100 DEG C, when temperature to be absorbed reaches set temperature, by rich solution
It is introduced into desorption apparatus, desorption is stirred to rich solution at a constant temperature, while to desorption apparatus with the stream of 50~300mL/min
Amount is passed through nitrogen, and the variation of gas concentration lwevel is observed with single channel measurement and control instrument, shows to its gas concentration lwevel close to zero
And think that desorption is completed after maintaining such as 0.5 hour to 1.5 hours a period of time.After regeneration, then absorption experiment is carried out, so
Complete absorption/desorption circulation.1~5 regeneration efficiency is respectively 94.32%, 93.65%, 92.67%, 92.23% and
92%.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (8)
1. a kind of anhydrous carbon-dioxide absorbent preparation method, which comprises the following steps:
A, amine is dissolved in methanol, stirs to being completely dissolved, obtains mixed solution；
B, hollow silica microsphere or porous silica microballoon are added in the mixed solution that step A is obtained, continues to stir
It mixes reaction 2~8 hours, after reaction, is dried in vacuo, obtain amine improved silica microballoon；
C, amine improved silica microballoon is mixed with 2- [2- (dimethylamino) ethyoxyl] ethyl alcohol, obtains the modified titanium dioxide of amine
The anhydrous carbon-dioxide absorbent of silicon microballoon emulsion form；Mass fraction range of the amine improved silica microballoon in absorbent are as follows:
5wt%~40wt%.
2. a kind of anhydrous carbon-dioxide absorbent preparation method according to claim 1, which is characterized in that the amine is poly-
Close object amine or alkylamine.
3. a kind of anhydrous carbon-dioxide absorbent preparation method according to claim 1, which is characterized in that amine and titanium dioxide
Silicon microballoon or amine and porous silica microballoon press the proportional arrangement of 1:9~3:2.
4. a kind of anhydrous carbon-dioxide absorbent preparation method according to claim 1 or 2 or 3, it is characterised in that: described
Hollow silica microsphere is prepared as follows: Polystyrene powder is added to ultrasound point in the mixed solution of second alcohol and water
0.5~1.5h is dissipated, then 1~2h of magnetic agitation at 25~70 DEG C, is subsequently added into a small amount of ammonium hydroxide；Then positive silicic acid is added dropwise
Ethyl ester or tetraethyl orthosilicate, after continuing to be stirred to react 2~3h at 25~70 DEG C, are centrifuged, are cleaned and vacuum is dry
It is dry；Finally, obtaining hollow silica microsphere in 500 DEG C~700 DEG C calcining 3h~5h；Polystyrene and ethyl orthosilicate or
The mass ratio of person and tetraethyl orthosilicate are as follows: 1:1.
5. a kind of anhydrous carbon-dioxide absorbent preparation method according to claim 1 or 2 or 3, it is characterised in that: described
Porous silica microballoon is prepared as follows: cetyl trimethylammonium bromide is added to the mixed solution of second alcohol and water
Middle ultrasonic disperse, the completely rear a small amount of ammonium hydroxide of addition to be mixed；Then ethyl orthosilicate or tetraethyl orthosilicate is added dropwise,
Continue to be stirred to react after 2~3h at 25~70 DEG C, be centrifuged, cleaned and be dried in vacuo, finally, being forged at 500 DEG C~700 DEG C
3h~5h is burnt, porous silica microballoon is obtained；Cetyl trimethylammonium bromide and ethyl orthosilicate or with orthosilicic acid four
The mass ratio of ethyl ester are as follows: 1:3.
6. the method for carrying out carbon dioxide absorption and desorption using anhydrous carbon-dioxide absorbent, it is characterised in that: including as follows
Step:
Absorbent is placed in absorption kettle and carries out carbon dioxide absorption, the absorbent is amine improved silica microballoon and 2-
[2- (dimethylamino) ethyoxyl] ethyl alcohol is mixed to get by the mass ratio of 1:20~3:2；After the completion of to be absorbed, rich solution is carried out
Desorption；Specific desorption procedure are as follows: setting desorption temperature is 70~100 DEG C, and when temperature to be absorbed reaches set temperature, rich solution is drawn
Enter into desorption apparatus, desorption is stirred to rich solution at a constant temperature, while to desorption apparatus with the flow of 50~300mL/min
Be passed through nitrogen, and with the variation of single channel measurement and control instrument observation gas concentration lwevel, show to its gas concentration lwevel close to zero and
Think that desorption is completed after maintaining a period of time；
The amine improved silica microballoon is prepared as follows:
A, amine is dissolved in methanol, stirs to being completely dissolved, obtains mixed solution；
B, hollow silica microsphere or porous silica microballoon are added in the mixed solution that step A is obtained, continues to stir
It mixes reaction 2~8 hours, after reaction, is dried in vacuo, obtain amine improved silica microballoon.
7. the method according to claim 6 for carrying out carbon dioxide absorption and desorption using carbon-dioxide absorbent, special
Sign is: the amine is polymeric amine or alkylamine.
8. the method according to claim 7 for carrying out carbon dioxide absorption and desorption using carbon-dioxide absorbent, special
Sign is: amine is with silicon dioxide microsphere or amine with porous silica microballoon by the proportional arrangement of 1:9~3:2.
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Cited By (4)
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| CN110052116A (en) * | 2019-04-30 | 2019-07-26 | 重庆大学 | A kind of method of fumaric acid-based carbon-dioxide absorbent and absorption and desorption carbon dioxide |
| CN111715031A (en) * | 2020-06-24 | 2020-09-29 | 江西师范大学 | Carbon dioxide absorption medium and optimization process thereof |
| CN113477033A (en) * | 2021-07-20 | 2021-10-08 | 金浦新材料股份有限公司 | Self-emulsifiable organic silicon decarbonization solvent |
| CN114644535A (en) * | 2021-06-28 | 2022-06-21 | 石河子大学 | Carbon dioxide fertilizer for regulating plant photosynthesis and preparation method and application thereof |
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| CN114644535A (en) * | 2021-06-28 | 2022-06-21 | 石河子大学 | Carbon dioxide fertilizer for regulating plant photosynthesis and preparation method and application thereof |
| CN114644535B (en) * | 2021-06-28 | 2023-03-14 | 石河子大学 | Carbon dioxide fertilizer for regulating and controlling plant photosynthesis and preparation method and application thereof |
| CN113477033A (en) * | 2021-07-20 | 2021-10-08 | 金浦新材料股份有限公司 | Self-emulsifiable organic silicon decarbonization solvent |
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