Stainless steel doped perovskite ceramic dual-phase composite hollow fiber oxygen permeable membrane and preparation method thereof

A perovskite and stainless steel technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of low mechanical strength and difficult assembly of membrane modules, and achieve high mechanical strength and easy assembly into membrane modules , The effect of simple preparation process
CN104923083BActive Publication Date: 2017-03-22上海穗杉实业股份有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
上海穗杉实业股份有限公司
Publication Date
2017-03-22

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Abstract

The invention belongs to the technical field of inorganic membranes, and particularly relates to a stainless steel doped perovskite ceramic two-phase composite hollow fiber oxygen-permeating membrane and a preparation method thereof. Being doped with 3 to 10 percent of stainless steel powder, a perovskite ceramic hollow fiber oxygen-permeating membrane can be greatly higher in strength. The preparation method comprises the following steps: preparing a casting solution containing perovskite ceramic powder, stainless steel powder, a polymer binder, a solvent and an additive; preparing a stainless steel / perovskite ceramic two-phase composite hollow fiber oxygen-permeating membrane precursor adopting an asymmetric structure according to a spinning phase inversion method; preparing the stainless steel doped perovskite ceramic two-phase composite hollow fiber oxygen-permeating membrane according to a certain high-temperature sintering program. The stainless steel doped perovskite ceramic two-phase composite hollow fiber oxygen-permeating membrane prepared according to the method is high in oxygen flux and mechanical strength, is easy to be assembled into a membrane component, and has the advantages that the practicability of a ceramic hollow fiber oxygen-permeating membrane is improved; the preparation process is simple; no complex equipment is required; convenience is brought for industrial production.
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Description

technical field

[0001] The invention belongs to the technical field of inorganic membranes, and in particular relates to a stainless steel-doped perovskite ceramic dual-phase composite hollow fiber oxygen-permeable membrane and a preparation method thereof. Background technique

[0002] The mixed conductor ceramic oxygen permeable membrane is a dense membrane made of perovskite ceramic materials that can conduct oxygen ions and electrons at the same time (so it is also called an ion ceramic membrane). Oxygen molecules in the ceramic membrane undergo a surface exchange reaction with the oxygen vacancies on the surface of the membrane, enter the membrane in the form of lattice oxygen, and generate electronic vacancies; when there is a difference in oxygen concentration on both sides of the membrane, the oxygen ion vacancies (or Oxygen ions) and electron vacancies (or electrons) undergo directional migration under the driving force of the concentration difference, and diffuse f...

Claims

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