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Anti-CO2 mixed conductor oxygen permeable membrane, preparation method and application thereof

A technology of mixed conductor and carbon dioxide, which is applied in the field of carbon dioxide-resistant mixed conductor oxygen-permeable membrane and its preparation, can solve the problems of limited stability, achieve the effect of overcoming easy loss, high oxygen permeation flux, and improving anti-CO2 performance

Inactive Publication Date: 2012-11-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the membrane materials developed at home and abroad are used in CO 2 Stability in atmosphere is still limited

Method used

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  • Anti-CO2 mixed conductor oxygen permeable membrane, preparation method and application thereof
  • Anti-CO2 mixed conductor oxygen permeable membrane, preparation method and application thereof
  • Anti-CO2 mixed conductor oxygen permeable membrane, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Prepare 0.1mol(Nd 0.9 La 0.1 ) 2 Ni 0.71 Cu 0.24 Ga 0.05 o 4+δ Powder: Weigh 0.18mol Nd(NO 3 ) 3 , 0.02mol La(NO 3 )3 , 0.071mol Ni (CHOOH) 2 4H 2 O, 0.024mol Cu(NO 3 ) 2 and 0.005mol Ga(NO 3 ) 3 Dissolve in water, add 0.45mol citric acid and 0.3mol ethylenediaminetetraacetic acid (ethylenediaminetetraacetic acid is first dissolved in ammonia water) to make a mixed solution, adjust the pH value to 8 with ammonia water to obtain a clear precursor solution, and heat to dark blue After turning into a gel, heat it to 200°C in an electric furnace to burn off the organic matter to obtain a pre-powder, then raise the temperature of the pre-powder at 2°C / min to 950°C for 10 hours, and then cool it down to 20°C at 2°C / min , the obtained product is ground to obtain a powder with a particle size of 1-8 μm;

[0035] Press to form a film: put the powder in a grinding tool, press it under a unidirectional pressure of 20MPa for 10 minutes to form a film, and then sinter...

Embodiment 2

[0044] Prepare 0.1mol(Nd 0.8 La 0.2 ) 2 Ni 0.71 Cu 0.24 Ga 0.05 o 4+δ Powder: Weigh 0.16mol Nd(NO 3 ) 3 , 0.04mol La(NO 3 ) 3 , 0.071mol Ni (CHOOH) 2 4H 2 O, 0.024mol Cu(NO 3 ) 2 and 0.005mol Ga(NO 3 ) 3 Dissolve in water, add 0.45mol citric acid and 0.3mol ethylenediaminetetraacetic acid (ethylenediaminetetraacetic acid is first dissolved in ammonia water) to make a mixed solution, adjust the pH value to 8 with ammonia water to obtain a clear precursor solution, and heat to dark blue After turning into a gel, heat it to 300°C in an electric furnace to burn off the organic matter to obtain a pre-powder, then heat the pre-powder at 1°C / min to 800°C for 20 hours, and then cool it down to 20°C at 1°C / min , the obtained product is ground to obtain a powder with a particle size of 1-8 μm;

[0045] Pressing to form a film: put the powder in a grinding tool, press it under a unidirectional pressure of 18MPa for 10 minutes to form a film, and then sinter the film in an...

Embodiment 3

[0048] Preparation of 0.1mol Nd by sol-gel method 2 Ni 0.71 Cu 0.24 Ga 0.05 o 4+δ Powder: Weigh 0.2mol Nd(NO 3 ) 3 , 0.071mol Ni (CHOOH) 2 4H 2 O, 0.024mol Cu(NO 3 ) 2 and 0.005mol Ga(NO 3 ) 3 Dissolve in water, add 0.45mol citric acid and 0.3mol ethylenediaminetetraacetic acid (ethylenediaminetetraacetic acid is first dissolved in ammonia water) to make a mixed solution, adjust the pH value to 8 with ammonia water to obtain a clear precursor solution, and heat to dark blue After turning into a gel, heat it to 250°C in an electric furnace to burn off the organic matter to obtain a pre-powder, then raise the temperature of the pre-powder at 3°C / min to 1200°C for 5 hours, and then cool it down to 20°C at 3°C / min , the obtained product is ground to obtain a powder with a particle size of 1-8 μm;

[0049]Press to form a film: put the powder in a grinding tool, press it under a unidirectional pressure of 15 MPa for 10 minutes to form a film, and then sinter the film in ...

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Abstract

The invention discloses an anti-CO2 mixed conductor oxygen permeable membrane, a preparation method and application of the anti-CO2 mixed conductor oxygen permeable membrane. The chemical formula is A2BO4+delta, wherein delta is oxygen nonstoichiometry, A is one or more of La, Ce, Pr, Nd, Pm, and Sm, B is one or more of Mn, Ni, Cu, Zn, Ga, Al, Fe, Mg, and In. The preparation method is as follow: dissolving nitrate or acetate solution of each metal element in polyfunctional organic acid, calcining and grinding the pre-powder obtained by pyrolysis to obtain powder, performing compression molding on the powder, and sintering the powder to obtain the mixed conductor oxygen permeable membrane. The mixed conductor oxygen permeable membrane obtained by the invention has high oxygen permeation flux and good anti-CO2 performance, overcomes the defects of pyrolysis of a traditional perovskite material in the CO2 atmosphere, and can be used for selectively separating oxygen from an oxygen-containing mixer and catalysis reaction, and also can be used for producing electrodes of low temperature solid oxide fuel cells and solid electrochemical sensors.

Description

technical field [0001] The invention belongs to the field of mixed conductor materials and relates to an anti-CO 2 A mixed conductor film, in particular to a carbon dioxide resistant mixed conductor oxygen permeable film and its preparation method and application. Background technique [0002] The mixed conductor membrane can be used as an oxygen permeable membrane material due to its electronic and oxygen ion conductivity, and a few can also be used in the hydrogen permeation process. At a certain temperature, when there is an oxygen concentration gradient on both sides of the membrane, oxygen will conduct oxygen in the form of ionized oxygen through oxygen holes instead of in the form of molecular oxygen. Theoretically, the permeation selectivity to oxygen is 100%. , and the oxygen permeability of some materials can be comparable to that of microporous membranes. [0003] The mixed conductor oxygen permeable membrane can be used for the separation of oxygen in the air, t...

Claims

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Application Information

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IPC IPC(8): C04B35/01C04B35/622
Inventor 王海辉郑琴
Owner SOUTH CHINA UNIV OF TECH
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