Tubular high-temperature solid oxide oxygen permeation membrane and preparation method thereof

A high-temperature solid and oxygen-permeable film technology, applied in the direction of oxygen preparation, oxygen/ozone/oxide/hydroxide, chemical instruments and methods, etc., can solve complex problems, achieve low power consumption, good safety, reduce Effect of Connector Cost

Pending Publication Date: 2022-03-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In terms of integration, the tubular oxygen-permeable membrane does not depend on the complex structure of the connecting body, and the connection can be realized through ceramic sealant. Related patents such as ZL201911157436.0 discuss the sealing technology of the tubular oxygen-permeable membrane, but it depends on the mold The operation of sealing the tubular oxygen-permeable membrane is still too complicated, and a process that can integrate the tubular oxygen-permeable membrane is needed

Method used

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  • Tubular high-temperature solid oxide oxygen permeation membrane and preparation method thereof
  • Tubular high-temperature solid oxide oxygen permeation membrane and preparation method thereof
  • Tubular high-temperature solid oxide oxygen permeation membrane and preparation method thereof

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preparation example Construction

[0048] The preparation method of the solid oxide high-temperature oxygen-permeable membrane of the present invention comprises:

[0049] 1) Mix the porous support layer component powder, pore-forming agent, organic solvent, dispersant, polymer binder, and plasticizer by ball milling and then vacuumize to obtain the porous support layer slurry; the porous oxygen-permeable film layer Component powder, pore forming agent, organic solvent, dispersant, polymer binder, and plasticizer are ball-milled and mixed evenly, and then vacuumized to obtain a porous oxygen-permeable membrane layer slurry. The dense oxygen-permeable film layer component powder, pore-forming agent, organic solvent, dispersant, polymer binder, and plasticizer are ball-milled and mixed evenly, and then vacuumized to obtain a dense oxygen-permeable film layer slurry;

[0050] 2) The porous support layer slurry is prepared on a paraffin-coated glass tube by dipping-pulling process, and the support body reaches the ...

Embodiment 1

[0062] The large-area tubular high-temperature solid oxide oxygen permeable membrane is prepared by dipping-pulling method. The preparation process includes:

[0063] (1) Add pore-forming agent, organic solvent, dispersant, binder and plasticizer to the material powder of each functional layer, and fully mix by ball milling. Among them, the viscous porous support layer 2 slurry was ball milled for 3.5 hours under the condition of 400r / min, and the ball-to-material ratio was 1:2. The other functional layer slurries were ball milled for 48 hours at 100r / min, with a ball-to-material ratio of 1:1, so that the components could be fully dispersed. After the slurry is ball milled, filter it with an 80-mesh screen to remove the incompletely dissolved binder slag, and then vacuumize it under the condition of -0.1MPa to extract the air bubbles mixed in the slurry;

[0064] (2) The environment for the impregnation-lifting process requires indoor relative humidity <50%, and a temperature...

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Abstract

The invention discloses a tubular high-temperature solid oxide oxygen-permeable membrane and a preparation method thereof, the oxygen-permeable membrane is of a tubular structure with one closed end and one open end, and the oxygen-permeable membrane comprises a first current collection layer, a porous support layer, a first porous oxygen-permeable membrane layer, a compact oxygen-permeable membrane layer, a second porous oxygen-permeable membrane layer and a second current collection layer from inside to outside. The inside of the oxygen permeable membrane is in contact with air, and separated oxygen is generated outside. The compact oxygen-permeable membrane layer has extremely high selective permeability to oxygen, and oxygen ions can directionally move in the compact oxygen-permeable membrane layer by applying electric energy at the operating temperature of 700-800 DEG C, so that the effect of separating oxygen from air or other oxygen-containing mixed gases is achieved. The high-temperature tubular oxygen permeation membrane disclosed by the invention is prepared by adopting a dipping-pulling method, the process is simple and does not depend on complex equipment, and the preparation of a large-area tubular oxygen permeation membrane can be relatively easily realized. The tubular oxygen permeation membrane has higher mechanical strength during operation so as to bear the pressure difference between the air side and the oxygen production side, and the service life of the oxygen permeation membrane is prolonged.

Description

technical field [0001] The invention belongs to the field of electrochemical oxygen production and the field of solid oxide electrolytic cells, and specifically relates to a tubular high-temperature solid oxide oxygen permeable membrane and a preparation method thereof. Background technique [0002] Oxygen, as an important industrial raw material and an important material for medical care, is widely used in our daily production and life. Therefore, it is very meaningful to find an efficient and safe oxygen production method. The current oxygen production methods are mainly divided into three categories: physical oxygen production methods, pure chemical oxygen production methods and electrochemical oxygen production methods. Physical oxygen production methods mainly include the pressure swing adsorption method using molecular sieves for the selective permeability of oxygen molecules, and the cryogenic rectification method using the difference in condensation temperature poin...

Claims

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Application Information

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IPC IPC(8): B01D69/04B01D69/10B01D69/02B01D71/02B01D67/00B01D53/22C01B13/02
CPCB01D69/04B01D69/10B01D69/02B01D71/024B01D71/022B01D67/0046B01D67/0041B01D67/0076B01D53/228B01D53/226B01D53/229C01B13/0255B01D2323/46B01D2325/26
Inventor 周娟丁孝张博
Owner NANJING UNIV OF SCI & TECH
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