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Method for increasing oxygen flux of fluorite type ion conductor membrane material

A technology of ion conductors and membrane materials, applied in the field of multiphase oxygen-permeable membrane materials, which can solve problems such as reduced reliability, limited oxygen-permeable membrane materials, and power loss

Active Publication Date: 2015-05-20
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electronic conductivity of the ion-conducting membrane is relatively low. In order to realize oxygen transmission in the application process, it is necessary to add electrodes and connect an external circuit, so that the structure of the membrane module is complicated, the reliability is reduced, and the loss of electric energy and other problems exist.
[0004] From the perspective of industrial application, the development of oxygen permeable membranes is limited by the long-term stability of the oxygen flux of the material and the 2 and other acid gases or H 2 Structural stability of membrane materials under reducing gases such as S, especially in CO 2 The stability of the material under the atmosphere, so the available oxygen permeable membrane materials are still limited

Method used

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  • Method for increasing oxygen flux of fluorite type ion conductor membrane material
  • Method for increasing oxygen flux of fluorite type ion conductor membrane material
  • Method for increasing oxygen flux of fluorite type ion conductor membrane material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Ce 0.5 PR 0.5 o 2-δ +Co 3 o4 Preparation of Multiphase Oxygen Permeable Membrane

[0028] Ce 0.5 PR 0.5 o 2-δ +Co 3 o 4 The preparation of the multiphase oxygen permeable membrane diaphragm is mainly divided into two steps:

[0029] Ce 0.5 PR 0.5 o 2-δ +Co 3 o 4 Synthesis of Multiphase Oxygen Permeable Membrane Materials and Ce 0.5 PR 0.5 o 2-δ +Co 3 o 4 Preparation of Multiphase Oxygen Permeable Membranes.

[0030] Ce 0.5 PR 0.5 o 2-δ +Co 3 o 4 Synthesis of heterogeneous oxygen-permeable membrane materials: Firstly, Ce was synthesized by EDTA-CA sol-gel combined complexation method 0.5 PR 0.5 o 2-δ . Next, weigh a certain mass ratio of Ce 0.5 PR 0.5 o 2-δ Powder and Co 3 o 4 The powder was placed in a ball mill jar (where Co 3 o 4 Powder and Ce 0.5 PR 0.5 o 2-δ The mass percentage of the powder is 20%), and put into a high-energy ball mill (FRITSCH, Pulverisette 6) for ball milling for 3 hours until the mixture is uniform...

Embodiment 2

[0033] Example 2: Ce 0.75 Gd 0.25 o 2-δ +SrCO 3 Preparation of Multiphase Oxygen Permeable Membrane

[0034] Ce 0.75 Gd 0.25 o 2-δ +SrCO 3 The preparation of multiphase oxygen permeable membrane diaphragm is mainly divided into two steps: Ce 0.75 Gd 0.25 o 2-δ +SrCO 3 Synthesis of Multiphase Oxygen Permeable Membrane Materials and Ce 0.75 Gd 0.25 o 2-δ +SrCO 3 Preparation of Multiphase Oxygen Permeable Membranes.

[0035] Ce 0.75 Gd 0.25 o 2-δ +SrCO 3 Synthesis of heterogeneous oxygen-permeable membrane materials: First, Ce was synthesized by hydrothermal synthesis 0.75 Gd 0.25 o 2-δ Material. Next, weigh a certain mass ratio of Ce 0.75 Gd 0.25 o 2-δ Powder and SrCO 3 The powder was placed in a ball mill jar (where SrCO 3 Powder and Ce 0.75 Gd 0.25 o 2-δ The mass percentage of the powder is 10%), and put into a high-energy ball mill (FRITSCH, Pulverisette 6) for ball milling for 5 hours until the mixture is uniform. Then, the slurry was removed a...

Embodiment 3

[0038] Example 3: Ce 0.8 SM 0.2 o 2-δ +SrCO 3 +Co 3 o 4 Preparation of Multiphase Oxygen Permeable Membrane

[0039] Ce 0.8 SM 0.2 o 2-δ +SrCO 3 +Co 3 o 4 The preparation of multiphase oxygen permeable membrane diaphragm is mainly divided into two steps: Ce 0.8 SM 0.2 o 2-δ +SrCO 3 +Co 3 o 4 Synthesis of Multiphase Oxygen Permeable Membrane Materials and Ce 0.8 SM 0.2 o 2- δ +SrCO 3 +Co 3 o 4 Preparation of Multiphase Oxygen Permeable Membranes.

[0040] Ce 0.8 SM 0.2 o 2-δ +SrCO 3 +Co 3 o 4 Synthesis of heterogeneous oxygen-permeable membrane materials: First, Ce was synthesized by hydrothermal synthesis 0.5 PR 0.5 o 2-δ Material. Next, weigh a certain mass ratio of Ce 0.8 SM 0.2 o 2-δ Powder, SrCO 3 Powder and Co 3 o 4 Powder (Ce 0.8 SM 0.2 o 2-δ , SrCO 3 ,Co 3 o 4 The X-ray diffraction curve of figure 1 shown) placed in the ball mill tank (in which SrCO 3 Powder and Co 3 o 4 Total powder and Ce 0.8 SM 0.2 o 2-δ The mass ra...

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Abstract

The invention relates to a method for increasing the oxygen flux of a fluorite type ion conductor membrane material. A substance having high electron conduction capacity is added into the fluorite type ion conductor membrane material through a high-energy mechanical ball-milling method, so that a mixed multi-phase oxygen permeable membrane material having an expression of M0+M1 is formed, wherein the structural formula of a fluorite type ion conductor membrane material M0 is AxB<1-x>O<2-delta>; an A-site positive ion is one or more of rare-earth metal ions; a B-site positive ion is one or more of rare-earth metal ions different from the A-site positive ion; x is more than 0.1 and less than 0.9; delta is more than or equal to 0 and less than or equal to 1; a substance M1 having high electron conduction capacity is one or more of metallic oxides or metal carbonate; and the mass percentage of M1 to M0 is 10%-40%. The temperature of the multi-phase oxygen permeable membrane prepared by the method is in the range of 600-900 DEG C; and therefore, the oxygen flux is obviously increased.

Description

technical field [0001] The invention belongs to the technical field of oxygen-permeable membranes, and adds a certain mass ratio of metal oxides or metal carbonates to fluorite-type ion conductor membrane materials by means of high-energy mechanical ball milling to obtain a fluorite-type ion conductor A multiphase oxygen permeable membrane material in which the membrane is mixed with a substance with high electronic conductivity. Background technique [0002] Oxygen permeable membrane is a kind of high temperature, especially when the temperature is greater than 700 ℃, 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 Conduction will be in the form of oxygen ions through oxygen vacancies rather than in the form of molecular oxygen. From the research progress of oxygen-permeable membrane materials, oxygen-permeable membrane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00B01D53/22
Inventor 邵宗平张振宝陈登洁杨漂萍陈嘉玮
Owner NANJING UNIV OF TECH
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