CN111472056A - Purifying CO in waste gas2Adsorption film, preparation method and regeneration method - Google Patents

Purifying CO in waste gas2Adsorption film, preparation method and regeneration method Download PDF

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CN111472056A
CN111472056A CN202010368435.7A CN202010368435A CN111472056A CN 111472056 A CN111472056 A CN 111472056A CN 202010368435 A CN202010368435 A CN 202010368435A CN 111472056 A CN111472056 A CN 111472056A
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polyether sulfone
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adsorption film
mass ratio
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CN111472056B (en
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蒋涛
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SHANGHAI KAIJIN NEW MATERIAL TECHNOLOGY Co.,Ltd.
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Abstract

The invention relates to the technical field of waste gas treatment, and provides a method for purifying CO in waste gas2The adsorption film and the preparation method and the regeneration method thereof. The method comprises the steps of preparing a nano fiber membrane from quaternary ammoniated polyether sulfone and polyamide acid through electrostatic spinning, heating and curing the nano fiber membrane containing a light absorbing agent and an absorption reinforcing agent to obtain the quaternary ammoniated polyether sulfone/polyimide composite nano fiber membrane, further performing alkali washing on the fiber membrane by using a sodium acetate solution, and replacing chloride ions with acetate ions to obtain CO2An adsorption film with good adsorption capacity. The adsorption film can not reduce CO in the presence of water vapor2Instead, the adsorption capacity of (C) can promote CO2The adsorption of (2) and the rapid regeneration of the adsorption film can be realized by absorbing the heat obtained by solar energy, and the regeneration cost is low.

Description

Purifying CO in waste gas2Adsorption film, preparation method and regeneration method
Technical Field
The invention belongs to the technical field of waste gas treatment, and provides a method for purifying CO in waste gas2The adsorption film and the preparation method and the regeneration method thereof.
Background
With the rapid development of industry, CO2The amount of gas emissions has greatly exceeded the natural carbon cycle capability, creating serious environmental problems. From CO2The caused greenhouse effect causes the global average temperature to rise by 0.3-0.6 ℃ in the past 100 years, the temperature to rise by 3-5 ℃ in the northern hemisphere high-altitude area, the sea level to rise and the organisms to migrate. To protect the natural environment on which humans depend for survival, the world faces huge CO2And (5) reducing the emission pressure.
Application of adsorbent to CO in industrial waste gas2Concentrated capture is carried out, and then desorption and recycling are carried out, so that CO can be greatly reduced2The emission amount of the fuel can realize resource optimization, so the fuel is widely applied. Performance of the adsorbent on CO2Plays an important role in trapping and regeneration. Adsorbents include physical adsorbents and chemical adsorbents.
Physical sorbent through to CO2Physical adsorption of molecules to remove CO2Temporary fixation has the advantages of easy desorption and easy regeneration, but the industrial waste gas usually contains a certain amount of water vapor, and the water vapor adsorption capacity of common physical adsorbents (such as activated carbon and molecular sieves) is stronger than that of CO2Cause to CO2Has a smaller adsorption capacity. Chemical sorbent through with CO2The molecules form chemical bonds to realize adsorption, and the method has the advantage of large adsorption capacity, but the desorption regeneration of the method needs higher activation energy and larger temperature difference or pressure difference, so the regeneration cost is higher.
Disclosure of Invention
It can be seen that in the prior art, the physical adsorbent has the function of adsorbing CO in the presence of water vapor2The adsorption capacity of (a) is small, and the chemical adsorbent has a defect of high regeneration cost. Aiming at the situation, the invention provides a method for purifying CO in exhaust gas2The adsorption film and the preparation method and the regeneration method thereof are characterized in that under the existence of water vapor,not only can not reduce the CO2Instead, the adsorption capacity of (C) can promote CO2The adsorption of (2) and the rapid regeneration of the adsorption film can be realized by absorbing the heat obtained by solar energy, and the regeneration cost is low.
In order to achieve the purpose, the invention relates to the following specific technical scheme:
the invention firstly provides a method for purifying CO in waste gas2The preparation method of the adsorption film comprises the following specific steps:
(1) adding polyether sulfone into dimethylformamide, stirring until the polyether sulfone is completely dissolved, then adding 2, 3-epoxypropyltrimethylammonium chloride, reacting for 12-15 h at 60-70 ℃, cooling to room temperature, precipitating by using acetone, washing with ethanol, and drying in vacuum to obtain quaternary ammoniated polyether sulfone;
(2) dissolving quaternary ammoniation polyether sulfone in dimethyl formamide to obtain a solution A, and dissolving polyamide acid in dimethyl formamide to obtain a solution B;
(3) mixing the solution A, the solution B, a light absorbent and an absorption enhancer to obtain a spinning solution, carrying out electrostatic spinning to obtain a quaternary ammoniated polyether sulfone/polyamide acid composite nanofiber membrane, heating to 280-300 ℃, and curing for 4-6 hours to obtain a quaternary ammoniated polyether sulfone/polyimide composite nanofiber membrane;
(4) performing alkali washing on the composite nanofiber membrane by using a sodium acetate solution, and replacing chloride ions with acetate ions to obtain purified CO2The adsorption film of (1).
Preferably, in the step (1), the mass ratio of the polyether sulfone to the 2, 3-epoxypropyltrimethylammonium chloride to the dimethylformamide is 25: 8-12: 100.
preferably, in the solution A in the step (2), the mass ratio of the quaternary ammoniated polyether sulfone to the dimethylformamide is 14-18: 100, respectively; in the solution B, the mass ratio of the polyamic acid to the dimethylformamide is (12-16): 100.
preferably, in the step (3), the light absorbent is prepared from cobalt sulfide, lead sulfide and ferroferric oxide according to a mass ratio of 2: 2: 1.
Preferably, in the step (3), the absorption enhancer is prepared from 1- (4-chlorophenyl) -2-cyclopropylethanone and sodium vinylsulfonate in a mass ratio of 2: 1.
Preferably, in the step (3), the mass ratio of the solution A to the solution B to the light absorber to the absorption enhancer is 30-35: 60: 5-10: 0.5 to 1.
Preferably, in the step (3), the aperture of a spinning opening of the electrostatic spinning is 0.5-1 mm, the flow rate of the spinning solution is 0.2-0.4 m L/min, the spinning voltage is 15-18 kV, and the receiving distance is 10-12 cm.
Preferably, in the step (4), the concentration of the sodium acetate solution is 1 mol/L.
According to the invention, 2, 3-epoxypropyltrimethylammonium chloride is adopted to modify polyether sulfone, and the obtained quaternary ammoniated polyether sulfone is an anion exchange resin and can carry out ion exchange through chloride ions. Then the quaternary ammoniated polyether sulfone and the polyamide acid are made into a nanofiber membrane through electrostatic spinning, and a light absorbing agent and an absorption reinforcing agent are added into the spinning solution. And heating to dehydrate and cyclize the polyamic acid, and curing to obtain the quaternized polyether sulfone/polyimide composite nanofiber membrane. Further, the fiber membrane is subjected to alkali washing by using a sodium acetate solution to obtain acetate ions (Ac)-) Displacement of chloride ions to obtain para-CO2An adsorption film with good adsorption capacity.
The invention also provides a method for purifying CO in waste gas prepared by the preparation method2The adsorption film of (1). The adsorption film is particularly suitable for CO in the presence of water vapor2Adsorption and collection are carried out. The adsorption film adsorbs CO2The principle and the process are as follows: immobilized quaternary amino cation immobile Ac bonded to polyether sulfone backbone-Is a weak acid radical, and has the capability of moving and ion exchange. On contact with water, Ac-And H+Has stronger binding capacity and enables the surface of the membrane to have more active OH-，OH-With CO2Combine to form HCO3 -Thereby realizing the reaction to CO2Adsorption of (3). Therefore, under the condition of existence of water vapor, the CO is not reduced2Instead, the adsorption capacity of (C) can promote CO2Adsorption of (3).
The invention further providesStep provides a method for purifying CO in the waste gas2The regeneration method of the adsorption membrane comprises the following specific processes: vacuumizing the sealed transparent container, and adsorbing CO2The fiber membrane is placed in a container and stands under the sunlight until the CO in the container is detected2The concentration is not increased any more. When the adsorbent adsorbs CO2Ac in the system after mixing with water vapor-、OH-、HCO3 -To H+With competing binding to reach an equilibrium state in which HCO is present3 -And H+H formed by bonding2CO3Is unstable and is easily converted into CO2And H2O, this process can be achieved by overcoming only a low energy barrier. At H2CO3Conversion to CO2And H2After O, H+Will continue to react with HCO3 -The combination reaches a new balance to make CO2Is desorbed and released continuously. The invention adopts the light absorbent composed of cobalt sulfide, lead sulfide and ferroferric oxide introduced into the adsorption film, and the absorbed film material is placed under the sunlight to absorb the heat obtained by the solar energy, thus realizing the H function2CO3Conversion to CO2And H2And O, thereby realizing the regeneration of the adsorption film. The absorption enhancer consisting of 1- (4-chlorphenyl) -2-cyclopropyl ethyl ketone and sodium vinyl sulfonate can accelerate the regeneration speed. The method avoids the high temperature used by the traditional regeneration method and obviously reduces the regeneration cost.
The invention provides a method for purifying CO in waste gas2Compared with the prior art, the adsorption film and the preparation method and the regeneration method thereof have the outstanding characteristics and excellent effects that:
1. CO produced by the invention2The adsorption film does not reduce CO in the presence of water vapor2Instead, the adsorption capacity of (C) can promote CO2Adsorption of (3).
2. CO produced by the invention2The adsorption film can be quickly regenerated only by absorbing heat obtained by solar energy, so that the regeneration cost is reduced.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but it should not be construed that the scope of the present invention is limited to the following examples. Various substitutions and alterations can be made by those skilled in the art and by conventional means without departing from the spirit of the method of the invention described above.
Example 1
Preparation of an adsorption film:
(1) adding polyether sulfone into dimethylformamide, stirring until the polyether sulfone is completely dissolved, then adding 2, 3-epoxypropyltrimethylammonium chloride, reacting for 15h at 60 ℃, cooling to room temperature, separating out a precipitate by using acetone, washing with ethanol, and drying in vacuum to obtain quaternary ammoniated polyether sulfone; the mass ratio of the polyether sulfone to the 2, 3-epoxypropyltrimethylammonium chloride to the dimethylformamide is 25: 8: 100, respectively;
(2) dissolving quaternary ammoniation polyether sulfone in dimethyl formamide to obtain a solution A, and dissolving polyamide acid in dimethyl formamide to obtain a solution B; in the solution A, the mass ratio of the quaternary ammoniated polyether sulfone to the dimethylformamide is 18: 100, respectively; in the solution B, the mass ratio of the polyamic acid to the dimethylformamide is 12: 100, respectively;
(3) mixing the solution A, the solution B, a light absorbent and an absorption enhancer according to a mass ratio of 30: 60: 10: 0.5 to obtain a spinning solution, carrying out electrostatic spinning to obtain a quaternary ammoniated polyether sulfone/polyamide acid composite nanofiber membrane, heating to 300 ℃ and curing for 4 hours to obtain the quaternary ammoniated polyether sulfone/polyimide composite nanofiber membrane, wherein the light absorbent consists of cobalt sulfide, lead sulfide and ferroferric oxide according to a mass ratio of 2: 2: 1, the absorption enhancer consists of 1- (4-chlorophenyl) -2-cyclopropyl ethyl ketone and sodium vinyl sulfonate according to a mass ratio of 2: 1, the pore diameter of a spinning opening of the electrostatic spinning is 1mm, the flow rate of the spinning solution is 0.2m L/min, the spinning voltage is 15kV, and the receiving distance is 12 cm;
(4) performing alkaline washing on the composite nanofiber membrane by adopting 1 mol/L sodium acetate solution, and replacing chloride ions with acetate ions to obtain purified CO2The adsorption film of (3);
regeneration of the adsorption film: vacuumizing the sealed transparent container, and adsorbing CO2The fiber membrane is placed in a container and stands under the sunlight until the CO in the container is detected2The concentration is not increased any more, and the CO which can be adsorbed again is obtained2The fibrous membrane of (1).
Example 2
Preparation of an adsorption film:
(1) adding polyether sulfone into dimethylformamide, stirring until the polyether sulfone is completely dissolved, then adding 2, 3-epoxypropyltrimethylammonium chloride, reacting for 12 hours at 70 ℃, cooling to room temperature, separating out a precipitate by using acetone, washing with ethanol, and drying in vacuum to obtain quaternary ammoniated polyether sulfone; the mass ratio of the polyether sulfone to the 2, 3-epoxypropyltrimethylammonium chloride to the dimethylformamide is 25: 12: 100, respectively;
(2) dissolving quaternary ammoniation polyether sulfone in dimethyl formamide to obtain a solution A, and dissolving polyamide acid in dimethyl formamide to obtain a solution B; in the solution A, the mass ratio of the quaternary ammoniated polyether sulfone to the dimethylformamide is 14: 100, respectively; in the solution B, the mass ratio of the polyamic acid to the dimethylformamide is 16: 100, respectively;
(3) mixing the solution A, the solution B, a light absorbent and an absorption enhancer according to a mass ratio of 35: 60: 5: 1 to obtain a spinning solution, carrying out electrostatic spinning to obtain a quaternary ammoniated polyether sulfone/polyamide acid composite nanofiber membrane, heating to 280 ℃ and curing for 6 hours to obtain the quaternary ammoniated polyether sulfone/polyimide composite nanofiber membrane, wherein the light absorbent consists of cobalt sulfide, lead sulfide and ferroferric oxide according to a mass ratio of 2: 2: 1, the absorption enhancer consists of 1- (4-chlorophenyl) -2-cyclopropylethanone and sodium vinylsulfonate according to a mass ratio of 2: 1, the pore diameter of a spinning opening of the electrostatic spinning is 1mm, the flow rate of the spinning solution is 0.4m L/min, the spinning voltage is 18kV, and the receiving distance is 10 cm;
(4) performing alkaline washing on the composite nanofiber membrane by adopting 1 mol/L sodium acetate solution, and replacing chloride ions with acetate ions to obtain purified CO2The adsorption film of (3);
regeneration of the adsorption film: vacuumizing the sealed transparent container, and adsorbing CO2The fiber membrane is placed in a container and stands under the sunlight until the CO in the container is detected2The concentration is not increased any more, and the CO which can be adsorbed again is obtained2Of (2)And (3) a membrane.
Example 3
Preparation of an adsorption film:
(1) adding polyether sulfone into dimethylformamide, stirring until the polyether sulfone is completely dissolved, then adding 2, 3-epoxypropyltrimethylammonium chloride, reacting for 14 hours at 62 ℃, cooling to room temperature, separating out a precipitate by using acetone, washing with ethanol, and drying in vacuum to obtain quaternary ammoniated polyether sulfone; the mass ratio of the polyether sulfone to the 2, 3-epoxypropyltrimethylammonium chloride to the dimethylformamide is 25: 9: 100, respectively;
(2) dissolving quaternary ammoniation polyether sulfone in dimethyl formamide to obtain a solution A, and dissolving polyamide acid in dimethyl formamide to obtain a solution B; in the solution A, the mass ratio of the quaternary ammoniated polyether sulfone to the dimethylformamide is 15: 100, respectively; in the solution B, the mass ratio of the polyamic acid to the dimethylformamide is 13: 100, respectively;
(3) mixing the solution A, the solution B, a light absorbent and an absorption enhancer according to a mass ratio of 33: 60: 6: 0.7 to obtain a spinning solution, carrying out electrostatic spinning to obtain a quaternary ammoniated polyether sulfone/polyamide acid composite nanofiber membrane, heating to 290 ℃ and curing for 5 hours to obtain the quaternary ammoniated polyether sulfone/polyimide composite nanofiber membrane, wherein the light absorbent consists of cobalt sulfide, lead sulfide and ferroferric oxide according to a mass ratio of 2: 2: 1, the absorption enhancer consists of 1- (4-chlorophenyl) -2-cyclopropyl ethyl ketone and sodium vinyl sulfonate according to a mass ratio of 2: 1, the pore diameter of a spinning opening of the electrostatic spinning is 1mm, the flow rate of the spinning solution is 0.3m L/min, the spinning voltage is 16kV, and the receiving distance is 12 cm;
(4) performing alkaline washing on the composite nanofiber membrane by adopting 1 mol/L sodium acetate solution, and replacing chloride ions with acetate ions to obtain purified CO2The adsorption film of (3);
regeneration of the adsorption film: vacuumizing the sealed transparent container, and adsorbing CO2The fiber membrane is placed in a container and stands under the sunlight until the CO in the container is detected2The concentration is not increased any more, and the CO which can be adsorbed again is obtained2The fibrous membrane of (1).
Example 4
Preparation of an adsorption film:
(1) adding polyether sulfone into dimethylformamide, stirring until the polyether sulfone is completely dissolved, then adding 2, 3-epoxypropyltrimethylammonium chloride, reacting for 14 hours at 68 ℃, cooling to room temperature, separating out a precipitate by using acetone, washing with ethanol, and drying in vacuum to obtain quaternary ammoniated polyether sulfone; the mass ratio of the polyether sulfone to the 2, 3-epoxypropyltrimethylammonium chloride to the dimethylformamide is 25: 10: 100, respectively;
(2) dissolving quaternary ammoniation polyether sulfone in dimethyl formamide to obtain a solution A, and dissolving polyamide acid in dimethyl formamide to obtain a solution B; in the solution A, the mass ratio of the quaternary ammoniated polyether sulfone to the dimethylformamide is 17: 100, respectively; in the solution B, the mass ratio of the polyamic acid to the dimethylformamide is 15: 100, respectively;
(3) mixing the solution A, the solution B, a light absorbent and an absorption enhancer according to a mass ratio of 32: 60: 8: 1 to obtain a spinning solution, carrying out electrostatic spinning to obtain a quaternary ammoniated polyether sulfone/polyamide acid composite nanofiber membrane, heating to 300 ℃ and curing for 4.5 hours to obtain the quaternary ammoniated polyether sulfone/polyimide composite nanofiber membrane, wherein the light absorbent consists of cobalt sulfide, lead sulfide and ferroferric oxide according to a mass ratio of 2: 2: 1, the absorption enhancer consists of 1- (4-chlorophenyl) -2-cyclopropyl ethyl ketone and sodium vinyl sulfonate according to a mass ratio of 2: 1, the pore diameter of a spinning opening of the electrostatic spinning is 1mm, the flow rate of the spinning solution is 0.2m L/min, the spinning voltage is 15kV, and the receiving distance is 12 cm;
(4) performing alkaline washing on the composite nanofiber membrane by adopting 1 mol/L sodium acetate solution, and replacing chloride ions with acetate ions to obtain purified CO2The adsorption film of (3);
regeneration of the adsorption film: vacuumizing the sealed transparent container, and adsorbing CO2The fiber membrane is placed in a container and stands under the sunlight until the CO in the container is detected2The concentration is not increased any more, and the CO which can be adsorbed again is obtained2The fibrous membrane of (1).
Example 5
Preparation of an adsorption film:
(1) adding polyether sulfone into dimethylformamide, stirring until the polyether sulfone is completely dissolved, then adding 2, 3-epoxypropyltrimethylammonium chloride, reacting for 12 hours at 70 ℃, cooling to room temperature, separating out a precipitate by using acetone, washing with ethanol, and drying in vacuum to obtain quaternary ammoniated polyether sulfone; the mass ratio of the polyether sulfone to the 2, 3-epoxypropyltrimethylammonium chloride to the dimethylformamide is 25: 12: 100, respectively;
(2) dissolving quaternary ammoniation polyether sulfone in dimethyl formamide to obtain a solution A, and dissolving polyamide acid in dimethyl formamide to obtain a solution B; in the solution A, the mass ratio of the quaternary ammoniated polyether sulfone to the dimethylformamide is 18: 100, respectively; in the solution B, the mass ratio of the polyamic acid to the dimethylformamide is 12: 100, respectively;
(3) mixing the solution A, the solution B, a light absorbent and an absorption enhancer according to a mass ratio of 30: 60: 10: 0.5 to obtain a spinning solution, carrying out electrostatic spinning to obtain a quaternary ammoniated polyether sulfone/polyamide acid composite nanofiber membrane, heating to 280 ℃ and curing for 5.5 hours to obtain the quaternary ammoniated polyether sulfone/polyimide composite nanofiber membrane, wherein the light absorbent consists of cobalt sulfide, lead sulfide and ferroferric oxide according to a mass ratio of 2: 2: 1, the absorption enhancer consists of 1- (4-chlorophenyl) -2-cyclopropylethanone and sodium vinylsulfonate according to a mass ratio of 2: 1, the pore diameter of a spinning opening of the electrostatic spinning is 1mm, the flow rate of the spinning solution is 0.3m L/min, the spinning voltage is 15kV, and the receiving distance is 11 cm;
(4) performing alkaline washing on the composite nanofiber membrane by adopting 1 mol/L sodium acetate solution, and replacing chloride ions with acetate ions to obtain purified CO2The adsorption film of (3);
regeneration of the adsorption film: vacuumizing the sealed transparent container, and adsorbing CO2The fiber membrane is placed in a container and stands under the sunlight until the CO in the container is detected2The concentration is not increased any more, and the CO which can be adsorbed again is obtained2The fibrous membrane of (1).
Comparative example 1
Adding a light absorbent and an absorption enhancer into water, uniformly mixing, and immersing into activated carbon for treatment for 1h to obtain a physical adsorbent; the light absorbent is prepared from cobalt sulfide, lead sulfide and ferroferric oxide according to the mass ratio of 2: 2: 1, preparing a composition; the absorption enhancer is prepared from 1- (4-chlorphenyl) -2-cyclopropyl ethyl ketone and sodium vinyl sulfonate according to the mass ratio of 2: 1, preparing a composition; the mass ratio of the light absorbent to the absorption enhancer to the water is 10: 0.5: 100.
comparative example 2
Adding a light absorbent and an absorption enhancer into water, uniformly mixing, and immersing into active carbon loaded with tetraethylenepentamine for treatment for 1h to obtain a chemical adsorbent; the light absorbent is prepared from cobalt sulfide, lead sulfide and ferroferric oxide according to the mass ratio of 2: 2: 1, preparing a composition; the absorption enhancer is prepared from 1- (4-chlorphenyl) -2-cyclopropyl ethyl ketone and sodium vinyl sulfonate according to the mass ratio of 2: 1, preparing a composition; the mass ratio of the light absorbent to the absorption enhancer to the water is 10: 0.5: 100.
and (3) performance testing: simulated gas (10 wt% CO) was used2、10wt%H2O、80wt%N2) The experiment was carried out by injecting 50g of a simulant gas into three separate chambers having a volume of 1m3In a closed transparent container (first evacuated), the CO in the container before adsorption is tested2Concentration; 100g of the adsorption film of example 5 and the adsorbents of comparative examples 1 and 2 were placed in a container, and left to stand at 25 ℃ for 30min, respectively, to test CO in the container after adsorption2Concentration; simultaneously standing the container in the same place under the sunlight until the CO in the container is detected2The concentration is not increased any more, and CO in the container after desorption is obtained2And (4) concentration.
Table 1:
Figure DEST_PATH_IMAGE001

Claims (10)

1. purifying CO in waste gas2The preparation method of the adsorption film is characterized by comprising the following specific steps:
(1) adding polyether sulfone into dimethylformamide, stirring until the polyether sulfone is completely dissolved, then adding 2, 3-epoxypropyltrimethylammonium chloride, reacting for 12-15 h at 60-70 ℃, cooling to room temperature, precipitating by using acetone, washing with ethanol, and drying in vacuum to obtain quaternary ammoniated polyether sulfone;
(2) dissolving quaternary ammoniation polyether sulfone in dimethyl formamide to obtain a solution A, and dissolving polyamide acid in dimethyl formamide to obtain a solution B;
(3) mixing the solution A, the solution B, a light absorbent and an absorption enhancer to obtain a spinning solution, carrying out electrostatic spinning to obtain a quaternary ammoniated polyether sulfone/polyamide acid composite nanofiber membrane, heating to 280-300 ℃, and curing for 4-6 hours to obtain a quaternary ammoniated polyether sulfone/polyimide composite nanofiber membrane;
(4) performing alkali washing on the composite nanofiber membrane by using a sodium acetate solution, and replacing chloride ions with acetate ions to obtain purified CO2The adsorption film of (1).
2. The method according to claim 1 for purifying CO in exhaust gas2The preparation method of the adsorption membrane is characterized in that in the step (1), the mass ratio of the polyether sulfone to the 2, 3-epoxypropyltrimethylammonium chloride to the dimethylformamide is 25: 8-12: 100.
3. the method according to claim 1 for purifying CO in exhaust gas2The preparation method of the adsorption membrane is characterized in that in the solution A in the step (2), the mass ratio of the quaternary ammoniated polyether sulfone to the dimethylformamide is 14-18: 100, respectively; in the solution B, the mass ratio of the polyamic acid to the dimethylformamide is (12-16): 100.
4. the method according to claim 1 for purifying CO in exhaust gas2The preparation method of the adsorption film is characterized in that in the step (3), the light absorbent is prepared from cobalt sulfide, lead sulfide and ferroferric oxide according to the mass ratio of 2: 2: 1.
5. The method according to claim 1 for purifying CO in exhaust gas2The preparation method of the adsorption film is characterized in that in the step (3), the absorption enhancer is prepared from 1- (4-chlorphenyl) -2-cyclopropyl ethyl ketone and sodium vinyl sulfonate according to the mass ratio of 2: 1.
6. The method according to claim 1 for purifying CO in exhaust gas2The preparation method of the adsorption film is characterized in that in the step (3), the mass ratio of the solution A to the solution B to the light absorbent to the absorption enhancer is 30-35: 60: 5-10: 0.5 to 1.
7. The method according to claim 1 for purifying CO in exhaust gas2The preparation method of the adsorption film is characterized in that in the step (3), the aperture diameter of a spinning opening of electrostatic spinning is 0.5-1 mm, the flow rate of a spinning solution is 0.2-0.4 m L/min, the spinning voltage is 15-18 kV, and the receiving distance is 10-12 cm.
8. The method according to claim 1 for purifying CO in exhaust gas2The method for producing an adsorption film of (4), wherein in the step (4), the concentration of the sodium acetate solution is 1 mol/L.
9. A purified exhaust gas comprising CO produced by the production method according to any one of claims 1 to 82The adsorption film of (1).
10. A purified exhaust gas comprising CO produced by the production method according to any one of claims 1 to 82The regeneration method of the adsorption membrane is characterized by comprising the following specific processes: vacuumizing the sealed transparent container, and adsorbing CO2The fiber membrane is placed in a container and stands under the sunlight until the CO in the container is detected2The concentration is not increased any more.
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WO2008054104A1 (en) * 2006-10-30 2008-05-08 Lg Chem, Ltd. Filter matter for air cleaning, filter made of the same, and method for making the same
CN102427141A (en) * 2011-12-01 2012-04-25 中山大学 Composite proton exchange membrane and preparation method thereof
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