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Preparation method of polyether sulphone ketone base gas separation carbon membrane

A polyether sulfone ketone and gas separation technology, which is applied in the field of separation membrane preparation technology and new materials, can solve the problem of large-scale application and commercialization of carbon membranes, the unsatisfactory gas separation ability of carbon membranes, and the preparation process of carbon membranes. Complicated problems, to achieve high gas permeability and selectivity, widen the range of options, and cheap prices

Inactive Publication Date: 2006-09-13
DALIAN UNIV OF TECH
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  • Summary
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  • Description
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  • Application Information

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Problems solved by technology

[0008] ) and other materials, wherein the carbon membrane prepared with polyimide as the precursor has the best gas separation ability, but its price is too expensive, and the carbon membrane gas separation ability prepared by other precursors is not very ideal; in addition, the traditional The carbon membrane preparation process is generally more complicated, and in order to obtain higher gas separation performance, it often needs to rely on post-oxidation, post-pyrolysis, chemical vapor deposition (CVD) and other methods for modification (Saufi S.M., et al, Carbon 42(2004) : 241), these problems largely limit the large-scale application and commercialization of carbon membranes

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve polyethersulfoneketone (sulfoneketone ratio 1:1) in nitrogen methylpyrrolidone to form a 15wt% solution, vacuum filter impurities in the solution through a filter cloth, and then let stand for 24 hours for defoaming. After scraping the film, dry it at 80°C for 24h, and then dry it in a vacuum oven at 100°C for 24h. Put the obtained polymer film into a heating furnace, and pre-oxidize at 460° C. for 60 minutes at an air flow rate of 150 mL / min and control the temperature rise rate at 3° C. / min to obtain a pre-oxidized film. Put the pre-oxidized polyethersulfoneketone film in a tubular carbonization furnace, control the heating rate to 1°C / min, and the carbonization temperature is 500-1000°C at a constant temperature of 60min at an argon flow rate of 200mL / min. The prepared thickness is 31-40 carbon film.

[0025] Carbonization temperature (℃)

[0026] 1 Barrer = 10 -10 cm 3 (STP) cm cm -2 the s -1 cm Hg -1

Embodiment 2

[0028] Polyether sulfone ketone (sulfone ketone ratio is 4:1) was dissolved in dimethyl sulfoxide to prepare a 12%wt solution, the impurities in the solution were vacuum filtered through a filter cloth, and then stood for 24 hours for defoaming. After scraping the film, dry it at 80°C for 24h, and then dry it in a vacuum oven at 100°C for 24h. The obtained polymer film was placed in a heating furnace, and pre-oxidized at 400° C. for 160 min at an air flow rate of 200 mL / min and controlled at a heating rate of 1° C. / min to obtain a pre-oxidized film. Put the pre-oxidized polyethersulfoneketone membrane into a tubular carbonization furnace, control the heating rate to 5°C / min, and carbonize at 850°C for 60min at a nitrogen flow rate of 50mL / min. The permeability of the prepared carbon membrane at 30°C is: hydrogen (H 2 ): 118.6 Barrer (1 Barrer = 10 -10 cm 3 (STP) cm cm -2 √ -1 mHg -1 ), carbon dioxide (CO 2 ): 163.9Barrer, oxygen (O 2 ): 26.6Barrer, nitrogen (N 2 )3.3B...

Embodiment 3

[0030] Support body

[0031] 1 Barrer = 10 -10 cm 3 (STP) cm cm -2 the s -1 cm Hg -1

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Abstract

A poly (ether-sulfone-ketone) based carbon membrane for separating gas is prepared through providing said poly (ether-sulfone-ketone) as precursor, preparing filming liquid, preparing polymer membrane, preoxidizing and carbonifying.

Description

technical field [0001] The invention belongs to the field of separation membrane preparation technology and new materials, and relates to a preparation method of a polyethersulfone ketone-based gas separation carbon membrane. Background technique [0002] Membrane separation technology has the advantages of high efficiency, environmental protection, and energy saving. It has made rapid progress in recent decades and has been widely used in many fields such as food, biology, chemical industry, energy, and environmental protection. Gas separation membrane is an important part of membrane science and technology. It can be used to directly separate oxygen and nitrogen from air, recover hydrogen from synthetic ammonia purge gas, and remove carbon dioxide from natural gas. And the most promising third-generation gas separation technology after cryogenic distillation. With the improvement of people's production and living needs, the development of gas separation membranes is facin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D53/22
Inventor 王同华张兵邱介山蹇锡高
Owner DALIAN UNIV OF TECH
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