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A method for purifying CO in exhaust gas 2 The adsorption membrane of the present invention and preparation method, regeneration method

A technology for purifying waste gas and adsorbing membranes, applied in rayon manufacturing, filament/thread forming, fiber chemical characteristics, etc., can solve the problems of small adsorption capacity, high activation energy, large temperature difference, etc., achieve rapid regeneration and reduce regeneration Cost, effect of promoting adsorption

Active Publication Date: 2021-05-07
上海凯矜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Physisorbents by the CO 2 The physical adsorption of molecules and the CO 2 Temporary fixation has the advantages of easy desorption and easy regeneration. However, industrial waste gas usually contains a certain amount of water vapor, and common physical adsorbents (such as activated carbon, molecular sieve) have a stronger adsorption capacity for water vapor than CO 2 , resulting in CO 2 The adsorption capacity is small
Chemisorbents pass through with CO 2 Molecules form chemical bonds to achieve adsorption, which has the advantage of large adsorption capacity, but its desorption regeneration requires high activation energy, large temperature difference or pressure difference, so the regeneration cost is high

Method used

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  • A method for purifying CO in exhaust gas <sub>2</sub> The adsorption membrane of the present invention and preparation method, regeneration method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of adsorption membrane:

[0028] (1) Add polyethersulfone to dimethylformamide, stir until completely dissolved, then add 2,3-epoxypropyltrimethylammonium chloride, react at 60°C for 15h, cool to room temperature, and use acetone The precipitate is precipitated, washed with ethanol, and dried in vacuum to obtain quaternized polyethersulfone; the mass ratio of polyethersulfone, 2,3-epoxypropyltrimethylammonium chloride, and dimethylformamide is 25:8 : 100;

[0029] (2) Dissolve quaternized polyethersulfone in dimethylformamide to obtain solution A, and dissolve polyamic acid in dimethylformamide to obtain solution B; in solution A, quaternized polyethersulfone, dimethylformamide The mass ratio of formamide is 18:100; in solution B, the mass ratio of polyamic acid and dimethylformamide is 12:100;

[0030](3) Mix solution A, solution B, light absorber, and absorption enhancer in a mass ratio of 30:60:10:0.5 to obtain a spinning solution, and electrospin to ob...

Embodiment 2

[0034] Preparation of adsorption membrane:

[0035] (1) Add polyethersulfone to dimethylformamide, stir until completely dissolved, then add 2,3-epoxypropyltrimethylammonium chloride, react at 70°C for 12h, cool to room temperature, and use acetone The precipitate is precipitated, washed with ethanol, and dried in vacuum to obtain quaternized polyethersulfone; the mass ratio of polyethersulfone, 2,3-epoxypropyltrimethylammonium chloride, and dimethylformamide is 25:12 : 100;

[0036] (2) Dissolve quaternized polyethersulfone in dimethylformamide to obtain solution A, and dissolve polyamic acid in dimethylformamide to obtain solution B; in solution A, quaternized polyethersulfone, dimethylformamide The mass ratio of formamide is 14:100; in solution B, the mass ratio of polyamic acid and dimethylformamide is 16:100;

[0037] (3) Mix solution A, solution B, light absorber, and absorption enhancer in a mass ratio of 35:60:5:1 to obtain a spinning solution, and electrospin to obt...

Embodiment 3

[0041] Preparation of adsorption membrane:

[0042] (1) Add polyethersulfone to dimethylformamide, stir until completely dissolved, then add 2,3-epoxypropyltrimethylammonium chloride, react at 62°C for 14h, cool to room temperature, and use acetone The precipitate is precipitated, washed with ethanol, and dried in vacuum to obtain quaternized polyethersulfone; the mass ratio of polyethersulfone, 2,3-epoxypropyltrimethylammonium chloride, and dimethylformamide is 25:9 : 100;

[0043] (2) Dissolve quaternized polyethersulfone in dimethylformamide to obtain solution A, and dissolve polyamic acid in dimethylformamide to obtain solution B; in solution A, quaternized polyethersulfone, dimethylformamide The mass ratio of formamide is 15:100; in solution B, the mass ratio of polyamic acid and dimethylformamide is 13:100;

[0044] (3) Mix solution A, solution B, light absorber, and absorption enhancer in a mass ratio of 33:60:6:0.7 to obtain a spinning solution, and electrospin to ob...

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Abstract

The invention relates to the technical field of exhaust gas treatment, and provides a method for purifying CO in exhaust gas 2 The adsorption film and its preparation method and regeneration method. In this method, quaternized polyethersulfone and polyamic acid are electrospun to make a nanofiber membrane, and the fiber membrane contains a light absorbing agent and an absorption enhancer, and then heated and cured into a quaternized polyethersulfone / polyimide The composite nanofibrous membrane was further washed with sodium acetate solution to replace chloride ions with acetate ions, and the CO 2 Adsorbent film with good adsorption capacity. In the presence of water vapor, the adsorption membrane will not reduce the CO 2 Adsorption capacity, but can promote the CO 2 The adsorption, and the rapid regeneration of the adsorption film can be realized by using the heat obtained by absorbing solar energy, and the regeneration cost is low.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and provides a method for purifying CO in waste gas 2 The adsorption membrane and preparation method, regeneration method. Background technique [0002] With the rapid development of industry, CO 2 The amount of gas emissions has greatly exceeded the carbon cycle capacity of nature, causing serious environmental problems. by CO 2 The resulting greenhouse effect has caused the global average temperature to increase by 0.3-0.6°C in the past 100 years, and the temperature in the high latitudes of the northern hemisphere has increased by 3-5°C, resulting in sea level rise and biological migration. In order to protect the natural environment on which human beings depend, the world is facing a huge amount of CO 2 Abatement pressure. [0003] The use of adsorbents for CO in industrial waste gas 2 Centralized capture, and then desorption and recycling, can greatly reduce CO 2 It can al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00D01D10/02D01D10/06D04H1/4382D04H1/728D04H3/005D04H3/02D01F8/16D01F1/10D06M13/188C08G75/23D06M101/30
CPCC08G75/23D01D5/003D01D10/02D01D10/06D01F1/10D01F8/16D04H1/4382D04H1/728D04H3/005D04H3/02D06M13/188D06M2101/30
Inventor 蒋涛
Owner 上海凯矜新材料科技有限公司