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

A perovskite and stainless steel technology, applied in semipermeable 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 facilitating industrial production

Active Publication Date: 2015-09-23
上海穗杉实业股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problems of low mechanical strength and difficult assembly of membrane modules of the current perovskite ceramic hollow fiber oxygen permeable membrane, and provides a high strength, high permeability ceramic hollow fiber oxygen permeable membrane and a preparation method thereof

Method used

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  • Stainless steel doped perovskite ceramic two-phase composite hollow fiber oxygen-permeating membrane and preparation method thereof
  • Stainless steel doped perovskite ceramic two-phase composite hollow fiber oxygen-permeating membrane and preparation method thereof
  • Stainless steel doped perovskite ceramic two-phase composite hollow fiber oxygen-permeating membrane and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: stainless steel powder is doped with La 0.6 Sr 0.4 CoO 3-δ Dual Phase Composite Hollow Fiber Membrane

[0024] Dissolve the dispersant polyvinylpyrrolidone in the organic solvent N-methylpyrrolidone, add stainless steel powder and perovskite ceramic powder La 0.6 Sr 0.4 CoO 3-δ , after fully wetting, add the polymer binder polysulfone in batches, and fully stir to obtain a uniform and stable casting solution, wherein the mass percentage of the organic polymer binder is 9%; the mass percentage of the organic solvent is 36%; 0.6 Sr 0.4 CoO 3-δ The content of ceramic powder is 47.7%; the content of dispersant is 2%; the mass percentage of stainless steel powder is 5.3%; the obtained casting solution is vacuum degassed for 3 hours, then moved to the spinning equipment tank, under nitrogen pressure, with pure water As the core liquid, the casting liquid is pressed into the gel bath water through the spinning head to undergo phase transforma...

Embodiment 2

[0025] Embodiment 2: stainless steel powder doped with SrCo 0.8 sc 0.2 O 3-δ Dual Phase Composite Hollow Fiber Membrane

[0026] Dissolve the dispersant polyammonium methacrylate in the organic solvent N-methylpyrrolidone, add stainless steel powder with a particle size of 1-3 μm and perovskite ceramic powder SrCo 0.8 sc 0.2 o 3-δ , after fully wetting, add the polymer binder polyethersulfone in batches, and fully stir to obtain a uniform and stable casting solution, wherein, the mass percentage of the organic polymer binder is 9%; the mass percentage of the organic solvent 53%; SrCo 0.8 sc 0.2 o 3-δ The content of ceramic powder is 34.2%; the content of dispersant is 2%; the mass percentage of stainless steel powder is 1.8%; the obtained casting solution is vacuum degassed for 5 hours, then moved to the spinning equipment tank, under nitrogen pressure, with pure water As the core liquid, the casting liquid is pressed into the gel bath water through the spin...

Embodiment 3

[0027] Embodiment 3: stainless steel powder doped with La 0.6 Ca 0.4 FeO 3-δ Dual Phase Composite Hollow Fiber Membrane

[0028] Dissolve the dispersant methyl methacrylate in the organic solvent N,N-dimethylformamide, add stainless steel powder and perovskite ceramic powder La with a particle size of 1-3 μm 0.6 Ca 0.4 FeO 3-δ , after fully wetting, add the polymer binder polyethersulfone in batches, and fully stir to obtain a uniform and stable casting solution, wherein, the mass percentage of the organic polymer binder is 8%; the mass percentage of the organic solvent 59%; La 0.6 Ca 0.4 FeO 3-δ The content of ceramic powder is 31.04%; the content of dispersant is 1%; the mass percentage of stainless steel powder is 0.96%; the obtained casting solution is vacuum degassed for 1 h, and then moved to the spinning equipment tank, under nitrogen pressure, with pure Water is the core liquid, and the casting liquid is pressed into the gel bath water through the...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/08B01D67/00B01D71/02
Inventor 陈宗蓬凌文辉张岩罗二平申广浩王治国谭小耀王博
Owner 上海穗杉实业股份有限公司
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