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Preparation method and application of porous alumina/zirconia composite support co-im-mim membrane

A porous alumina, composite carrier technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problems of high cost, high temperature resistance industrial applications, etc., to achieve good separation performance, good thermal stability performance, film making Simple and efficient process

Active Publication Date: 2018-01-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, scientific researchers usually use alumina, copper mesh and other substrates as carriers, and have successfully prepared a small amount of MOFs material membranes, but few of them have been put into industrial production. The high cost and low temperature resistance have hindered their industrial use. Important factors for application

Method used

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  • Preparation method and application of porous alumina/zirconia composite support co-im-mim membrane
  • Preparation method and application of porous alumina/zirconia composite support co-im-mim membrane
  • Preparation method and application of porous alumina/zirconia composite support co-im-mim membrane

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Experimental program
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Effect test

Embodiment 1

[0040] Zirconia particles with a particle size distribution of 20-500n were added to a stabilizer to form an acetone suspension with a mass content of 4wt%, and the zirconia was introduced into the porous alumina carrier by the pulling method, and the pulling time was 30s. After being dried under high temperature, put it into a muffle furnace at 600°C and bake for 4 hours to obtain a porous alumina / zirconia composite carrier;

[0041] Dissolve 2.32g of metal salt cobalt nitrate, 2.6g of dimethylimidazole, and 2g of imidazole in 350ml of methanol, stir and react at 25°C for 12 hours, and separate by filtration to obtain metal organic framework CO-IM-mIM seed crystals;

[0042]The porous alumina / zirconia composite carrier was seeded by pulling method in 4wt% CO-IM-mIM methanol solution, the number of pulling was 4 times, and the time of keeping the carrier in the seed liquid was 30 seconds during each pulling , after each pulling, the carrier is dried at 60°C for 6 hours before ...

Embodiment 2

[0052] Zirconia particles with a particle size distribution of 20-500n were added with a stabilizer to form an acetone suspension with a mass content of 4wt%, and the zirconia was introduced into the porous alumina carrier by the pulling method, and the pulling time was 30s. After being dried under high temperature, put it into a muffle furnace at 600°C and bake for 4 hours to obtain a porous alumina / zirconia composite carrier;

[0053] Dissolve 2.32g of metal salt cobalt nitrate, 2.6g of dimethylimidazole, and 2g of imidazole in 350ml of methanol, stir and react at 25°C for 12 hours, and separate by filtration to obtain metal organic framework CO-IM-mIM seed crystals;

[0054] The porous alumina / zirconia composite carrier is seeded by pulling method in 2wt% CO-IM-mIM methanol solution, the number of pulling is 4 times, and the time of keeping the carrier in the seed liquid is 30 seconds during each pulling , after each pulling, the carrier is dried at 60°C for 6 hours before ...

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Abstract

The invention discloses a method for preparing a porous aluminum oxide / zirconium dioxide composite carrier support Co-IM-mIM film and application. According to the preparation method, a zirconium dioxide film layer is firstly prepared on the surface of a macroporous aluminum oxide base body; then, a Co-IM-mIM film is generated on the surface of the zirconium dioxide film layer by a secondary growth method; the structure of the prepared porous aluminum oxide / zirconium dioxide composite carrier support Co-IM-mIM film is compact and continuous, and no surface defect exists; when the porous aluminum oxide / zirconium dioxide composite carrier support Co-IM-mIM film is used for low-quality fuel gas separation and purification, the separation effect is good; the high-temperature-resistant performance is good; the porous aluminum oxide / zirconium dioxide composite carrier support Co-IM-mIM film is stable at high temperature, does not crack and can maintain better separation performance at high temperature.

Description

technical field [0001] The invention relates to a method for preparing dense continuous porous metal-organic framework compound (MOFs) film on an alumina / zirconia composite porous support, and the porous alumina / zirconia composite support supports the Co-IM-mIM film at low The application in the purification of high-quality gas belongs to the technical field of new membrane materials. Background technique [0002] Due to the advantages of simple devices, low energy consumption and high separation efficiency, membrane separation technology has become one of the important industrial means. The use of membrane separation technology to purify low-quality gas has important practical significance for the application of low-quality gas. Many low-quality gases are prepared at high temperatures, so it is important to develop a molecular sieve membrane with excellent separation performance and high temperature resistance. actual meaning. [0003] In the past ten years, metal-organic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/06B01D67/00B01D69/02C10L3/10
CPCB01D67/0006B01D69/02B01D71/024B01D71/025B01D71/06B01D2325/24C10L3/10C10L2290/548
Inventor 李立清高正才马卫武
Owner CENT SOUTH UNIV
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