Preparation method of structured adsorbent based on metal organic framework material

A metal-organic framework, structured technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problem of lack of versatility in production methods, and achieve the effects of high mechanical strength, good versatility and damage avoidance of the coating.

Active Publication Date: 2019-12-13
SUN YAT SEN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At the same time, the in-situ growth method is used to prepare the coating, which requires specific production conditions for each MOF, and the production method is basically not universal.

Method used

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  • Preparation method of structured adsorbent based on metal organic framework material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare MAF-4 type MOF powder: 15.00g zinc nitrate hexahydrate is dissolved in 360mL methanol, 30.00g dimethylimidazole is dissolved in 630mL methanol, after the above two are completely dissolved, the zinc nitrate solution is quickly added to the dimethylimidazole solution, Stir to obtain a mother liquor containing MAF-4 type MOF. The above mother liquor was ultrasonically treated for 30-60min, filtered and then vacuum-dried at 70°C to obtain MAF-4 MOF powder. The test result is: the specific surface area of ​​MAF-4 powder is 1630 m 2 / g.

[0029] Preparation of structured adsorbent: Dissolve 8 g of MAF-4 MOF powder and 1.5 g of bentonite in absolute ethanol. Dissolve 0.5 g of polyvinyl alcohol in deionized water, and ultrasonically dissolve it for several hours. The two solutions are mixed and stirred until a slurry of certain viscosity is obtained. Take 200 mesh cordierite honeycomb ceramics, the volume is 0.7×0.7×1.0cm 3 , after immersing in the above slurry, t...

Embodiment 2

[0031] Preparation of ZIF-67 MOF powder: 15.00g of cobalt nitrate hexahydrate was dissolved in 360mL of methanol, 62.00g of dimethylimidazole was dissolved in 630mL of methanol, after the above two were completely dissolved, the zinc nitrate solution was quickly added to the dimethylimidazole solution, Stir to obtain a suspension containing ZIF-67-type MOF. The above suspension was ultrasonicated for 30-60min, filtered and then vacuum-dried at 70°C to obtain ZIF-67 MOF powder. The test result is: ZIF-67 powder specific surface area is 1227m 2 / g.

[0032] Preparation of structured adsorbent: Dissolve 8 g of ZIF-67 MOF powder and 1.5 g of bentonite in absolute ethanol. Dissolve 0.5 g of polyvinyl alcohol in deionized water, and ultrasonically dissolve it for several hours. The two solutions are mixed and stirred until a slurry of certain viscosity is obtained. Take 200 mesh cordierite honeycomb ceramics, the volume is 0.7×0.7×1.0 cm 3 , after immersing in the above slurry,...

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Abstract

The invention discloses a preparation method of a structured adsorbent based on a metal organic framework material. The method comprises the following steps: (1) mixing MOF powder with a bonding auxiliary agent to form coating slurry, and supporting the coating slurry on the surface of a honeycomb carrier; and (2) oven-drying the honeycomb carrier supporting the coating slurry at a low temperatureto obtain the structured adsorbent based on the metal organic framework material. According to the method, the MOF powder can be firmly smeared on the surface of the honeycomb carrier, a production process is simple, wide MOF types are applicable, and a specific surface area loss of a MOF coating layer obtained after coating is low. The developed production process of the MOF-based monolithic adsorbent is compatible with industrial honeycomb coating equipment, and is suitable for batch industrialized molding of MOF materials prepared in batches.

Description

technical field [0001] The invention belongs to the technical field of structured adsorbent synthesis, and in particular relates to a method for preparing a structured adsorbent based on a metal-organic framework material. Background technique [0002] The separation of hydrocarbons and semi-permanent gases by means of MOFs is a key research area in recent years. Usually, MOF materials prepared by hydrothermal or precipitation methods exist in the form of powder, which can only be used for small-scale testing in the laboratory. Adsorbent materials used in industrial gas separation equipment need to take into account factors such as gas mass transfer, resistance and mechanical strength of the adsorbent. Therefore, it is necessary to structure the adsorbent and optimize its shape. Granular adsorbents are easy to process and widely used. In order to reduce the pressure drop of the bed, the diameter of the particles used is usually greater than 3 mm, which makes the mass tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30
CPCB01J20/226
Inventor 纪红兵许君楚陈家枢杨祖金
Owner SUN YAT SEN UNIV
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