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Production method of mixed conductor oxygen permeable membrane and oxygen/carbon monoxide mixed gas

A technology of mixed conductor and oxygen-permeable membrane, which is applied in the transportation of non-flammable liquid/gas, combustion method, separation method, etc., can solve the problems of low oxygen permeability and severe reaction, and achieve high oxygen permeability and simple production process. , to overcome the effect of mutual reactions

Inactive Publication Date: 2008-11-19
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a high-concentration CO 2 Mixed conductor oxygen permeable film with corrosion resistance and high oxygen permeability and its use in the production of O 2 / CO 2 The method of mixed gas to overcome the existing oxygen permeable membrane and CO 2 Disadvantages of violent reaction and low oxygen permeability

Method used

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  • Production method of mixed conductor oxygen permeable membrane and oxygen/carbon monoxide mixed gas
  • Production method of mixed conductor oxygen permeable membrane and oxygen/carbon monoxide mixed gas
  • Production method of mixed conductor oxygen permeable membrane and oxygen/carbon monoxide mixed gas

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1: Sr(Co 0.8 Fe 0.2 ) 1-z Zr z o 3-δ (z=0,0.10) ceramic oxygen permeable membrane material and O 2 / CO 2 Gas mixture production

[0026] In order to prove that the mixed conductor oxygen permeable membrane material of the present invention has better resistance to CO 2 Corrosion ability, compared with undoped SrCo 0.8 Fe 0.2 o 3-δ (i.e. z=0) material was used as a reference for comparison, from material in CO 2 Changes in the oxygen permeability and microscopic morphology in the atmosphere show that the mixed conductor oxygen permeable membrane material of the present invention has strong CO2 resistance. 2 Corrosion ability.

[0027] SrCo was prepared by solid-phase reaction synthesis 0.8 Fe 0.2 o 3-δ Dense ceramic oxygen permeable membrane: accurately weigh 23.0677 grams of SrCO 3 , 10.3668 g Co 2 o 3 and 2.4953 g Fe 2 o 3 , the weighed raw materials were ball milled and mixed in an alcohol medium for 24 hours, then quickly dried, and then pr...

Embodiment 2

[0039] Example 2: Sr(Co 0.8 Fe 0.2 ) 1-z Ti z o 3-δ (z=0,0.10) ceramic oxygen permeable membrane material

[0040] In order to prove that the mixed conductor oxygen permeable membrane material of the present invention has better resistance to CO 2 Corrosion ability, compared with undoped SrCo 0.8 Fe 0.2 o 3-δ (i.e. z=0) material was used as a reference for comparison, from material in CO 2 Changes in oxygen permeability, weight, etc. in the atmosphere illustrate that the mixed conductor oxygen-permeable membrane material of the present invention has a strong resistance to CO 2 ability to corrode.

[0041] SrCo was prepared by solid-phase reaction synthesis 0.8 Fe 0.2 o 3-δ Dense ceramic oxygen permeable membrane: accurately weigh 23.0677 grams of SrCO 3 , 10.3668 g Co 2 o 3 and 2.4953 g Fe 2 o 3 , the weighed raw materials were ball milled and mixed in an alcohol medium for 24 hours, then quickly dried, and then pre-calcined twice at 950-1050 ° C to obtain SrC...

Embodiment 3

[0049] Example 3: SrCo 0.6 Nb 0.4 o 3-δ Ceramic oxygen permeable membrane material

[0050] In order to prove that the mixed conductor oxygen permeable membrane material of the present invention has better resistance to CO 2 Corrosion ability, compared with undoped SrCo 0.8 Fe 0.2 o 3-δ material as a reference for comparison, from material in CO 2 The weight change in the atmosphere shows that the ceramic oxygen permeable membrane material used in the present invention has a strong resistance to CO 2 ability to corrode.

[0051] SrCo was first synthesized by solid phase reaction 0.8 Fe 0.2 o 3-δ Ceramic powder: Accurately weigh 23.0677 grams of SrCO 3 , 10.3668 g Co 2 o 3 and 2.4953 g Fe 2 o 3 , the weighed raw materials were ball milled and mixed in an alcohol medium for 24 hours, then quickly dried, and then pre-calcined twice at 950-1050°C to obtain SrCo 0.8 Fe 0.2 o 3-δ powder; XRD measurements show that the prepared sample is a pure-phase cubic perovskit...

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Abstract

The invention discloses a mixed conducting oxygen-permeable membrane and a method for the production of O2 / CO2 mixed gas. The mixed conducting oxygen-permeable membrane is characterized in that the chemical formula of B-site doped high valence or high electronegativity ions of a ABO3 perovskite structure is XxYyZzO3-Delta, wherein, X is one or more of lanthanides, alkaline earth metal or alkali metal elements; Y is selected from Cr, Mn, Fe, Co, Ni, Cu and / or Zn; Z is selected from Ti, Zr, Ge, Sn, Mo, W, V, Nb, Ta, Ce, Al, Ga and / or Bi, x, y and z are mole fractions, x is not less than 0.9 and not more than 1.0, z is more than 0 and not more than 0.4, and y plus z is equal to 1.0. The mixed conducting oxygen-permeable membrane has corrosion resistant ability of CO2 with high concentration, and high oxygen permeable ability, thereby being used for producing the O2 / CO2 mixed gas, reducing energy consumption, simplifying the operation, continuously supplying high-purity oxygen and overcoming the shortcomings of great energy consumption and complex operation of the prior art.

Description

technical field [0001] The invention belongs to the technical field of ceramic oxygen-permeable membranes, in particular to a perovskite-type mixed conductor oxygen-permeable membrane material and its application in the production of O 2 / CO 2 Gas mixture applications. Background technique [0002] Human activities emit large amounts of CO 2 The greenhouse effect caused by the gas has caused catastrophic damage to the earth's environment. Due to the extensive use of fossil fuels, especially fuels with high carbon content (such as coal), it has become the cause of CO in the atmosphere. 2 The main reason for the increased content, how to reduce CO in human production activities 2 Emissions have become a research hotspot for scientists around the world. The United States "Annual Reviews" (Annual Reviews, 1996, 21: 145) introduced the reduction of CO 2 Various methods of emissions, one of which is to capture CO from fossil fuel combustion 2 , which are then stored undergro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D53/22F23L7/00
Inventor 左艳波曾庆李伟陈初升
Owner UNIV OF SCI & TECH OF CHINA