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A class of glassy MOF membrane material with hydrogen separation properties and preparation method thereof

A glassy, ​​membrane material technology, applied in the field of membrane-based gas separation and glassy MOF membrane gas separation, to achieve the effect of high hydrogen flux, simple operation and high separation coefficient

Active Publication Date: 2022-05-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of the glassy MOF materials reported so far, only ZIF series glasses have been used for CO 2 Separation of gases, yet H 2 Isolated MOF glass membranes are reported

Method used

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  • A class of glassy MOF membrane material with hydrogen separation properties and preparation method thereof
  • A class of glassy MOF membrane material with hydrogen separation properties and preparation method thereof
  • A class of glassy MOF membrane material with hydrogen separation properties and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The concrete preparation method of the glassy MOF film material that dmbIm, phosphoric acid and zinc oxide are formed is as follows:

[0027] Put dmbIm, phosphoric acid and zinc oxide in a mortar, add quantitative ethanol, grind for half an hour, wash the obtained solid with dichloromethane, and dry to obtain Zn-P-dmbIm material. The obtained MOFs material was pressed into tablets to obtain a 2cm-diameter sheet, which was put into a tube furnace for calcination at 210°C for 0.5h, and a glassy Zn-P-dmbIm film was obtained after cooling.

Embodiment 2

[0029] The concrete preparation method of the glassy MOF membrane material that dmbIm, phosphoric acid and cadmium acetate are formed is as follows:

[0030] Put dmbIm, phosphoric acid and cadmium acetate in a mortar, add a certain amount of ethanol, grind for half an hour, wash the obtained solid with dichloromethane, and dry to obtain a Cd-P-dmbIm material. The obtained MOFs material was pressed into tablets to obtain a 2cm-diameter sheet, which was put into a tube furnace for calcination at 200°C for 1 hour, and a glassy Cd-P-dmbIm film was obtained after cooling.

Embodiment 3

[0032] The concrete preparation method of the glassy MOF membrane material that dmbIm, phosphoric acid and copper acetate are formed is as follows:

[0033] Put dmbIm, phosphoric acid and copper acetate in a mortar, add quantitative ethanol, grind for half an hour, wash the obtained solid with dichloromethane, and dry to obtain Cu-P-dmbIm material. The obtained MOFs material was pressed into tablets to obtain a 2cm-diameter sheet, which was put into a tube furnace for calcination at 190°C for 0.75h, and a glassy Cu-P-dmbIm film was obtained after cooling.

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Abstract

A class of glassy MOF membrane materials with hydrogen separation properties of the present invention is obtained by pressing the obtained MOFs powder material into tablets-melting-cooling or hot pressing on a substrate to prepare a glassy MOF with hydrogen separation properties The membrane material method is characterized in that: the steps are as follows: MOFs powder material preparation method: mix the materials in 2 or 3, add ethanol to grind, wash and dry the solid to obtain the target product, this kind of glassy MOFs membrane material It is synthesized by melting-cooling method for MOFs materials with glass transition behavior. This method is universal, easy to operate, low in raw material cost, large-scale processability, and different selectivities can be obtained by adjusting different metal salts The separation membrane material, the prepared glass MOF membrane H 2 / CO 2 The highest separation ratio can reach 92.7, and it has a hydrogen flux of 230.4 Barrer.

Description

technical field [0001] The invention belongs to the field of membrane-based gas separation, in particular to the field of glassy MOF membrane gas separation. Background technique [0002] Membrane-based gas separation, as one of the most promising recovery and purification technologies, has attracted much attention due to its high energy efficiency, low cost, easy operation and small footprint. However, synthesizing membranes that simultaneously satisfy high separation performance, ease of fabrication, and good mechanical stability faces great challenges. Currently, polymeric membranes dominate the commercial membrane market, but the trade-off between permeability and selectivity is extremely limited. In contrast, microporous inorganic materials usually have higher chemical and thermal stability than polymer membranes due to their rigid channels, and also possess molecular sieving properties, which can simultaneously address the issues of permeability and selectivity. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/04B01D71/36B01D69/12B01D69/02B01D67/00B01D53/22C01B3/50
CPCB01D71/04B01D71/36B01D69/02B01D69/12B01D67/0079B01D67/0074B01D53/228C01B3/503C01B2203/0405Y02P20/151Y02C20/40
Inventor 王博冯霄李婕
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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