Oxygen permeation membrane materials with stable oxygen flux in carbon dioxide-containing atmosphere

A carbon dioxide, oxygen-permeable membrane technology, applied in semi-permeable membrane separation, membrane technology, chemical instruments and methods, etc., can solve problems such as the instability of oxygen-permeable membrane materials, and improve the stability of unstable or H2S and other reducing gases. The effect of stabilizing and stabilizing oxygen flux

Active Publication Date: 2015-04-29
NANJING UNIV OF TECH
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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 improve the existing oxygen permeable membrane material in CO 2 The shortcoming of being uns...

Method used

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  • Oxygen permeation membrane materials with stable oxygen flux in carbon dioxide-containing atmosphere
  • Oxygen permeation membrane materials with stable oxygen flux in carbon dioxide-containing atmosphere
  • Oxygen permeation membrane materials with stable oxygen flux in carbon dioxide-containing atmosphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: SrFe 0.8 Cr 0.2 o 3-δ Preparation of Oxygen Permeable Membrane

[0024] SrFe 0.8 Cr 0.2 o 3-δ The specific preparation process of the oxygen permeable membrane diaphragm is mainly divided into two steps: SrFe 0.8 Cr 0.2 o 3- δ Powder preparation and SrFe 0.8 Cr 0.2 o 3-δ Membrane preparation.

[0025] SrFe 0.8 Cr 0.2 o 3-δ The method adopted for the preparation of the powder is EDTA-CA sol-gel combined complexation method. First, by SrFe 0.8 Cr 0.2 o 3-δ Stoichiometric ratio was weighed Sr(NO 3 ) 2 , Fe(NO 3 ) 3 , Cr(NO 3 ) 3Put the particles into a beaker, stir and heat, wait until all the particles are dissolved, add EDTA, CA two complexing agents, and add NH 3 ·H 2 O adjusts the pH of the solution to around 6. Secondly, put the beaker on the heating table and keep stirring until it becomes a sol, and put it in an oven at 250°C for 5 hours to obtain SrFe 0.8 Cr 0.2 o 3-δ precursors. Finally, the SrFe 0.8 Cr 0.2 o 3-δ Put th...

Embodiment 2

[0028] Example 2: SrFe 0.9 W 0.1 o 3-δ Preparation of Oxygen Permeable Membrane

[0029] SrFe 0.9 W 0.1 o 3-δ The specific preparation process of the oxygen permeable membrane diaphragm is mainly divided into two steps:

[0030] SrFe 0.9 W 0.1 o 3-δ Powder preparation and SrFe 0.9 W 0.1 o 3-δ Membrane preparation.

[0031] SrFe 0.9 W 0.1 o 3-δ The method adopted for the preparation of the powder is EDTA-CA sol-gel combined complexation method. First, by SrFe 0.9 W 0.1 o 3-δ Stoichiometric ratio was weighed Sr(NO 3 ) 2 , Fe(NO 3 ) 3 , (NH 4 ) 10 W 12 o 41 Put the particles into a beaker, stir and heat, wait until all the particles are dissolved, add EDTA, CA two complexing agents, and add NH 3 ·H 2 O to adjust the pH of the solution to 6.5. Secondly, put the beaker on the heating table and keep stirring until it becomes a sol, and put it in an oven at 250°C for 3 hours to obtain SrFe 0.9 W 0.1 o 3-δ precursors. Finally, the SrFe 0.9 W 0.1 o 3...

Embodiment 3

[0034] Example 3: CaFe 0.95 Zr 0.05 o 3-δ Preparation of Oxygen Permeable Membrane

[0035] CaFe 0.95 Zr 0.05 o 3-δ The specific preparation process of the oxygen permeable membrane diaphragm is mainly divided into two steps:

[0036] CaFe 0.95 Zr 0.05 o 3-δ Powder preparation and CaFe 0.95 Zr 0.05 o 3-δ Membrane preparation.

[0037] CaFe 0.95 Zr 0.05 o 3-δ The method adopted for the preparation of the powder is EDTA-CA sol-gel combined complexation method. First, by CaFe 0.95 Zr 0.05 o 3-δ Stoichiometric ratio was weighed Ca(NO 3 ) 2 , Fe(NO 3 ) 3 , Zr(NO 3 ) 4 Put the particles into a beaker, stir and heat, wait until all the particles are dissolved, add EDTA, CA two complexing agents, and add NH 3 ·H 2 O to adjust the pH of the solution to 6. Secondly, put the beaker on the heating table and keep stirring until it becomes a sol, and put it in an oven at 250°C for 6 hours to obtain CaFe 0.95 Zr 0.05 o 3-δ precursors. Finally, the CaFe 0.95 Zr...

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Abstract

The invention relates to oxygen permeation membrane materials with stable oxygen flux in a carbon dioxide-containing atmosphere. The oxygen permeation membrane materials are characterized in that the structural general formula is AB1-yMyO3-delta, wherein A is one or a mixture of Sr or Ca in alkali earth metal ions; B refers to the transition metal ion Fe; M refers to one or several in Cr, Mo, Nb, Ti, W or Zr; and y is more than or equal to 0.05 and less than or equal to 0.2. The mixed conductor oxygen permeation membrane materials of the type can simultaneously have a certain oxygen permeation flux and CO2 poisoning resistance in a temperature range of 600-900 DEG C. Therefore, a material with a certain oxygen permeation flux can be provided in the presence of CO2, so that the oxygen permeation membrane can have industrial application values in oxygen-enriched combustion and membrane reactors.

Description

technical field [0001] The invention belongs to the technical field of mixed conductor oxygen-permeable membrane, relates to a kind of oxygen-permeable membrane material with stable oxygen flux in an atmosphere containing carbon dioxide, and is a kind of oxygen-permeable membrane material with certain oxygen flux and anti-CO 2 properties of perovskite materials, specifically related to the CO 2 Under the existing conditions, the perovskite structure can be kept unchanged, and there is also an oxygen-permeable membrane material that can maintain a stable oxygen flux without decreasing. Background technique [0002] Oxygen permeable membrane is a kind of high temperature, especially when the temperature is greater than 700 ° C, it has both electronic and oxygen ion conductivity characteristics, and can be at a certain temperature, when there is oxygen partial pressure on both sides of the dense oxygen permeable membrane, Oxygen will be conducted in the form of oxygen ions thr...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D67/00B01D53/22
Inventor 邵宗平张振宝陈登洁
Owner NANJING UNIV OF TECH
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