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Titanium-based perovskite ceramic oxygen-permeable membrane with no cobalt or iron and preparation method and application thereof

A perovskite-type, oxygen-permeable membrane technology, applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology, etc., can solve problems such as poor chemical stability

Active Publication Date: 2019-05-10
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of poor chemical stability of the traditional oxygen-permeable membrane containing Co or Fe when working in a low oxygen partial pressure atmosphere. Conductor Oxygen Permeable Membrane

Method used

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  • Titanium-based perovskite ceramic oxygen-permeable membrane with no cobalt or iron and preparation method and application thereof
  • Titanium-based perovskite ceramic oxygen-permeable membrane with no cobalt or iron and preparation method and application thereof
  • Titanium-based perovskite ceramic oxygen-permeable membrane with no cobalt or iron and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] SrTi 0.8 Mg 0.15 Zr 0.05 o 3-δ (STMZ) Oxygen Permeable Membrane Preparation:

[0033] According to the stoichiometric ratio of the above materials, Sr(NO 3 ) 2 , Mg(NO 3 ) 2 and ZrO(NO 3 ) 2 Dissolve in water respectively, and then add citric acid and ethylenediaminetetraacetic acid to the mixture according to the molar ratio of citric acid, ethylenediaminetetraacetic acid and metal ion at a ratio of 1.5:1:1, and then add appropriate amount of ammonia water to adjust the solution At a pH of 9, a nitrate solution was obtained. Then mix tetrabutyl titanate with the mixed solution according to the stoichiometric ratio of STMZ; stir and mix until there is no gel and precipitation, and a stable solution is obtained. Wherein the mixed solution is mixed with equimolar lactic acid, absolute ethanol and glacial acetic acid.

[0034] Under the stirring condition of 500 rev / min, the precursor of STMZ was obtained after fully mixing the previously prepared nitrate soluti...

Embodiment 2

[0036] La 0.2 Sr 0.7 Ti 0.95 Mg 0.05 o 3-δ (LSTM) Oxygen Permeable Membrane Preparation:

[0037] According to the stoichiometric ratio of the above materials, La(NO 3 ) 3 , Sr(NO 3 ) 2 and Mg(NO 3 ) 2 Dissolve in water respectively, and then add citric acid and ethylenediaminetetraacetic acid to the mixture with the molar ratio of citric acid, ethylenediaminetetraacetic acid and metal ion at a ratio of 1.5:1:1, and then add appropriate amount of ammonia water to adjust the pH of the solution A value of 9 yields a nitrate solution. Afterwards, tetrabutyl titanate was mixed with the mixed liquid according to the stoichiometric ratio of LSTM, and stirred and mixed uniformly until there was no gel and precipitation, and a stable solution was obtained. Among them, the mixed solution is a mixture of equimolar lactic acid, absolute ethanol and glacial acetic acid; under the stirring condition of 500 rpm, the nitrate solution and the stable solution prepared before are ful...

Embodiment 3

[0039] BaTi 0.85 Mg 0.1 Zr 0.05 o 3-δ (BTMZ) Oxygen Permeable Membrane Preparation:

[0040] According to the stoichiometric ratio of the above materials, Ba(NO 3 ) 2 , Mg(NO 3 ) 2 and ZrO(NO 3 ) 2 Dissolve in water respectively, and then add citric acid and ethylenediaminetetraacetic acid to the mixture according to the molar ratio of citric acid, ethylenediaminetetraacetic acid and metal ion at a ratio of 1.5:1:1, and then add appropriate amount of ammonia water to adjust the solution At a pH of 9, a nitrate solution was obtained. Then, tetrabutyl titanate was mixed with the mixed solution according to the stoichiometric ratio of BTMZ, wherein the mixed solution was mixed with equimolar lactic acid, absolute ethanol and glacial acetic acid, stirred and mixed until there was no gel and precipitation, and a stable solution was obtained.

[0041] Under the stirring condition of 500 rev / min, the precursor of BTMZ was obtained after fully mixing the previously prepared ...

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Abstract

The invention belongs to the technical field of oxygen ion-electron mixed conductor oxygen-permeable membranes and particularly relates to a titanium-based perovskite ceramic oxygen-permeable membranewith no cobalt or iron and a preparation method and application thereof. The titanium-based perovskite ceramic oxygen-permeable membrane herein is made from materials with no cobalt or iron and has achemical composition expression of A1-xTi1-yByO3-delta, wherein A is selected from one or any of La, Y, Pr, Gd, Sm, Ba, Sr and Ca, and B is selected from one or any of Mg, Al, Er, Y, Gd and Zr, with0< / =x< / =0.2 and 0< / =y< / =0.2. The titanium-based perovskite ceramic oxygen-permeable membrane with no cobalt or iron provided herein is excellently stable in the strict working conditions, such as hightemperature, vapor, hydrogen and methane, is suitable for long-term stable operation under reaction conditions, is suitable for preparing high-purity hydrogen by hydrolysis of oxygen-permeable membranes, and is also suitable for producing hydrogen by coupling hydrolysis of a membrane reactor and producing synthetic gas from methane.

Description

technical field [0001] The invention belongs to the field of oxygen-ion-electron mixed conductor oxygen-permeable membrane material and membrane technology, and relates to the design of a mixed-conductor oxygen-permeable membrane material that does not contain cobalt, does not contain iron, uses titanium as the main body, and is chemically stable under a low oxygen partial pressure atmosphere. Preparation and application. Background technique [0002] The mixed-conductor oxygen-permeable membrane is a kind of membrane that uses the oxygen partial pressure gradient on both sides of the membrane as the driving force, and relies on the oxygen vacancies and electron defects provided by the membrane itself as the transmission channel to transport oxygen from the high oxygen partial pressure side to the low oxygen partial pressure side in the form of ions. On the side of the oxygen partial pressure, electrons conduct in the opposite direction in the membrane body, finally realizin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/465C04B35/622C01B3/04B01D71/02B01D67/00
CPCY02E60/36
Inventor 江河清贺广虎
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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