Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing tubular asymmetrical mixed conductor compact film

A mixed conductor, asymmetric technology, used in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. The effect of compactness problem, good repeatability, and simple preparation method

Active Publication Date: 2015-06-03
NANJING TECH UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is easy to prepare short tubular asymmetric membranes, but if it is to prepare industrial long membrane modules, many problems will be encountered, such as uneven membrane thickness, defects, difficulty in densification, repeatability, etc.
Moreover, the current method for preparing a tubular asymmetric mixed conductor dense film is to coat a film layer of mixed conductor material on the sintered support body, but due to the mismatch between the sintering shrinkage performance between the film layer and the support body, the film layer and the support body The interfacial joints between the bodies are prone to problems such as peeling and the separation membrane layer is not dense

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing tubular asymmetrical mixed conductor compact film
  • Method for preparing tubular asymmetrical mixed conductor compact film
  • Method for preparing tubular asymmetrical mixed conductor compact film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Both the support and the film layer are perovskite SrCo 0.4 Fe 0.5 Zr 0.1 o 3-δ Ionic-electronic mixed conductor materials. The support body material is synthesized by a high-temperature solid-phase method, and its particle size is 80 μm. A tubular support body green body with an inner diameter of 1 mm and a thickness of 0.75 mm is prepared by plastic extrusion, which contains 15 wt% of activated carbon as a pore-forming agent; membrane The layer material was prepared by the joint complexation method of improved citric acid and EDTA, and its particle size was 10 μm. Then, 3.96g of the film layer material was moved into 31.57g of ethanol, and then 0.17g of Tween-80 and 0.30g of glycerin were added as The dispersing agent is uniformly dispersed under ultrasonic conditions to obtain a suspension; the green body of the support body is placed in a resistance wire heating box with an ambient temperature of 150 ° C, and it is rotated at a speed of 200 r / min, and the spray g...

Embodiment 2

[0033] The support is Brownmillerite type Ca 2 FeAlO 5 Ionic and electronic mixed conductor materials, the film layers are all perovskite La 0.6 Sr 0.4 co 0.8 Fe 0.2 o 3-δ Ionic-electronic mixed conductor materials. The support body material was synthesized by the improved citric acid method, and its particle size was 60 μm. A tubular support body green body with an inner diameter of 30 mm and a thickness of 5 mm was prepared by plastic extrusion method, which contained 30 wt% of pore-forming agent, pore-forming agent It is made by mixing graphite and methyl cellulose according to the mass ratio of 1:1; the film layer material is also prepared by the improved citric acid method, and the particle size is 20 μm, and then 14g of the film layer material is transferred into 18.60g of isopropanol and 7.20g of In the mixed solution of ethylene glycol, add 6.862g fish oil again as dispersant, disperse evenly with mechanical ball mill, obtain suspension; The support body green bo...

Embodiment 3

[0035] The support is perovskite La 0.6 Sr 0.4 Ga 0.3 Fe 0.65 Al 0.05 o 3-δ Ionic and electronic mixed conductor material, the film layer is K 2 NiF 4 Type La 2 NiO 4+δ Ionic-electronic mixed conductor materials. The support body material was synthesized by high-temperature solid-state reaction method, and its particle size was 100 μm. A tubular support body green body with an inner diameter of 18 mm and a thickness of 2.5 mm was prepared by isostatic pressing method, which contained 20 wt% of pore-forming agent. The pore agent is made by mixing starch and polypropylene according to the mass ratio of 1:2; the film layer material is prepared by citric acid method, and the particle size is 5 μm, and then 4.2g of the film layer material is moved into 28.7g of n-octane, and then Add 2.1g glyceryl stearate as a dispersant, and disperse evenly with a mechanical ball mill to obtain a suspension; the green body of the support body is placed in an ambient temperature of 300°C ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a tubular asymmetrical mixed conductor compact film and a preparation method thereof. The preparation method comprises the following steps: rotating a tubular support body along an axis; spraying a mixed conductor material on the surface of the support body along the axis of the support body; and performing joint heat treatment to obtain the tubular asymmetrical mixed conductor compact film. The preparation method is simple, high in repeatability and suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a tubular inorganic membrane, in particular to a preparation method of a tubular asymmetric mixed conductor dense membrane. Background technique [0002] Mixed conductor dense membrane has become a research hotspot in the field of materials and chemical industry because of its great application prospect in gas separation and petrochemical industry. For mixed-conductor dense membrane materials, the key to realize industrial application is to improve the permeation flux, solve the stability of the membrane, and the high-temperature sealing of the components. Scholars from various countries agree that reducing the thickness of the membrane layer can not only increase the permeation flux of the membrane, but also effectively solve the stability problem of the material. However, as the film thickness decreases, the mechanical strength of the film decreases, and the industrial application of the film becomes ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00
Inventor 金万勤刘郑堃张广儒徐南平
Owner NANJING TECH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com