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Environmentally friendly liquid-supported carbon dioxide separation membrane

A carbon dioxide and separation membrane technology, applied in separation methods, semi-permeable membrane separation, dispersed particle separation, etc., can solve the problem of low selectivity, and achieve the effects of low preparation cost, low price and high stability

Inactive Publication Date: 2018-05-01
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In principle, this carbon dioxide separation method can obtain a high-strength, high-stability large-flux separation membrane; The selectivity is not high, and there is still a certain concentration of carbon dioxide in the separated gas

Method used

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  • Environmentally friendly liquid-supported carbon dioxide separation membrane
  • Environmentally friendly liquid-supported carbon dioxide separation membrane
  • Environmentally friendly liquid-supported carbon dioxide separation membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The main components of the environmentally friendly liquid-supported carbon dioxide separation membrane prepared in this example are polyethylene polyamine and polyvinyl alcohol, and the preparation method is as follows:

[0041] Step 1: Take 5g of polyethylene polyamine and 20g of polyvinyl alcohol as the main solute of the separation membrane.

[0042] Step 2: Take 225g of water as a solvent, heat it to 90°C, add polyvinyl alcohol and polyethylene polyamine successively, stir and dissolve, and form a separation membrane casting solution.

[0043] Step 3: Pour the solution evenly on the substrate, and scrape it into a 200 μm wet film with a film scraper.

[0044] Step 4: Put the substrate into a 120° C. constant-temperature drying oven for 3 hours of heat treatment.

[0045] Step 5: Take out the substrate, and after it cools down, remove the film from the substrate, that is, a film with a mass ratio of polyethylene polyamine to polyvinyl alcohol of 1:4 and a thickness...

Embodiment 2

[0047] The main components of the environmentally friendly liquid-supported carbon dioxide separation membrane prepared in this example are polyethylene polyamine and polyvinyl alcohol, and the preparation method is as follows:

[0048] Step 1: Take 5g of polyethylene polyamine and 10g of polyvinyl alcohol as the main solute of the separation membrane.

[0049] Step 2: Take 35g of water as a solvent, heat it to 95°C, add polyvinyl alcohol and polyethylene polyamine successively, stir and dissolve, and form a separation membrane casting solution.

[0050] Step 3: Pour the solution evenly on the substrate, and scrape it into a 40 μm wet film with a film scraper.

[0051] Step 4: Put the substrate into a constant temperature drying oven at 80° C. for 5 hours of heat treatment.

[0052] Step 5: Take out the substrate, and after it cools down, remove the film from the substrate, that is, a film with a mass ratio of polyvinyl polyamine to polyvinyl alcohol of 1:2 and a thickness of...

Embodiment 3

[0054] The main components of the environmentally friendly liquid-supported carbon dioxide separation membrane prepared in this example are polyethylene polyamine and polyvinyl alcohol, and the preparation method is as follows:

[0055] Step 1: Take 5g of polyethylene polyamine and 15g of polyvinyl alcohol as the main solute of the separation membrane.

[0056] Step 2: Take 100 g of water as a solvent, heat it to 93° C., add polyvinyl alcohol and polyethylene polyamine successively, stir and dissolve, and form a separation membrane casting solution.

[0057] Step 3: Pour the solution evenly on the substrate, and scrape it into a 160 μm wet film with a film scraper.

[0058] Step 4: Put the substrate into a constant temperature drying oven at 100° C. for 3 hours of heat treatment.

[0059] Step 5: Take out the substrate, and after it cools down, remove the film from the substrate, that is, a film with a thickness of 33 μm and a mass ratio of polyethylene polyamine to polyvinyl...

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Abstract

The invention discloses an environment-friendly liquid supporting carbon dioxide separation film which is prepared by dissolving a mixture of polyethylene polyamine and polyvinyl alcohol into water, and coating a film. Compared with the prior art, the environment-friendly liquid supporting carbon dioxide separation film disclosed by the invention has the advantages that in the preparation process, only water is used as a solvent and is not required to be recycled, and the film forming temperature is lower. The environment-friendly liquid supporting carbon dioxide separation film has the advantages of simple process, high energy conservation, high environment friendliness, zero pollution and low cost. The carbon dioxide separation film prepared by the method is extremely large in separation degree and extremely high in separation selectivity, has the characteristic of overcoming easy loss of the conventional liquid supporting carbon dioxide separation film, is higher in mechanical intensity, and can be used for CO2 separation for industrial waste gas and natural gas decarbonization and deacidification.

Description

technical field [0001] The invention belongs to the field of gas separation, and in particular relates to an environment-friendly liquid-supported carbon dioxide separation membrane. Background technique [0002] With the increasing environmental problems in the world, global warming has attracted more and more attention, and carbon dioxide (CO 2 ) has been generally considered to be the main cause of global warming. The use of fossil fuels is an anthropogenic activity that emits CO 2 The main source of (approximately 83% in the United States, EIA), and CO 2 The annual emissions will also show a trend of increasing year by year. With global warming, the climate issue has become a prominent issue that seriously threatens the survival and development of human beings. Among them, CO 2 Emission reduction has attracted great attention from all over the world. With the convening of the Copenhagen Climate Change Conference, my country solemnly promises to the world that by 20...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/38B01D67/00B01D53/22B01D53/02
CPCY02C20/40
Inventor 蒋峰景尹逸轩王希尧刘力恒王垚俣章俊良
Owner SHANGHAI JIAOTONG UNIV
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