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Liquid supported carbon dioxide separating 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, environmental friendliness, and high selective permeability

Inactive Publication Date: 2016-06-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Liquid supported carbon dioxide separating membrane
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  • Liquid supported carbon dioxide separating membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The liquid-supported carbon dioxide separation membrane of this embodiment includes organic matter dissolved in dimethylformamide and heat-treated to become the main component. The organic matter is polyethylene polyamine and polyethersulfone resin. The principle model of the liquid-supported carbon dioxide separation membrane is shown in Fig. figure 1 As shown, the separation membrane includes a polymer membrane substrate with a porous structure and a carbon dioxide polymer adsorbent adsorbed in the porous structure; the polymer membrane substrate 1 is a polyethersulfone resin to provide the separation membrane as a whole Mechanical strength, the carbon dioxide polymer adsorbent 2 is polyethylene polyamine, which has a relatively high boiling point and can well complete the CO 2 adsorption and desorption.

[0034] The preparation method of the liquid-supported carbon dioxide separation membrane of this embodiment is specifically as follows:

[0035] Step 1: Take 2.5g...

Embodiment 2

[0041] The liquid-supported carbon dioxide separation membrane of this embodiment includes organic matter dissolved in dimethylformamide and heat-treated to become the main component. The organic matter is polyethylene polyamine and polyethersulfone resin,

[0042] Its preparation method is as follows:

[0043] Step 1: Take 2g of polyethylene polyamine and 3g of polyethersulfone resin as the main solute of the separation membrane.

[0044] Step 2: Add 21 g of dimethylformamide solvent to the solute, and heat and stir at 80° C. to dissolve to form a separation membrane precursor solution.

[0045] Step 3: Pour the solution evenly on the substrate, and adjust the scraper to 240 μm to scrape it to the size of A4 paper.

[0046] Step 4: Put the substrate into a constant temperature drying oven at 80° C. for 3 hours of heat treatment.

[0047] 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 60 μm and a...

Embodiment 3

[0049] The liquid-supported carbon dioxide separation membrane of this embodiment includes organic matter dissolved in dimethylformamide and heat-treated to become the main component. The organic matter is polyethylene polyamine and polyethersulfone resin,

[0050] Its preparation method is as follows:

[0051] Step 1: Take 2.5g polyethylene polyamine and 5g polyethersulfone resin as the main solute of the separation membrane.

[0052] Step 2: Add 22.5 g of dimethylformamide solvent to the solute, and heat and stir at 70° C. to dissolve to form a separation membrane precursor solution.

[0053] Step 3: Pour the solution evenly on the substrate, and adjust the scraper to 160 μm to scrape it to the size of A4 paper.

[0054] Step 4: Put the substrate into a 90° C. constant-temperature drying oven for 3 hours of heat treatment.

[0055] 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 40 μm and a ma...

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Abstract

The invention discloses a liquid supported carbon dioxide separating membrane. The liquid supported carbon dioxide separating membrane is prepared through dissolving a mixture of polyethylene polyamine and polyethersulfone resin in an organic solvent and carrying out coating to obtain a film. Compared with the existing carbon dioxide separating membrane, the liquid supported carbon dioxide separating membrane has simple preparation processes, a low cost, low volatility and high permselectivity to carbon dioxide, solves the problem that the traditional separating membrane has a low gas permeation amount, easily corrodes equipment and has a high cost and poor stability, and can be used for industrial exhaust-gas treatment and natural gas purifying treatment.

Description

technical field [0001] The invention belongs to the field of gas filtration, in particular to a 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. [0003] than capture CO that has been emitted into the atmosphere 2 , to reduce CO at the source 2 The discharge volume is undoubtedly a more convenient method. For example, membrane separation technology can be used to treat CO in related gases 2 to separate. In addition, CO 2 Gas separation membranes can also play an important role in the purification process of natural g...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D67/00B01D53/22B01D53/02
CPCY02C20/40
Inventor 蒋峰景刘力恒尹逸轩王垚俣王希尧章俊良
Owner SHANGHAI JIAO TONG UNIV
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