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MOF (metal-organic framework) derived gas separation membrane as well as preparation method and application thereof

A gas separation membrane and reaction technology, applied in separation methods, gas treatment, semi-permeable membrane separation, etc., can solve the problems of polymer membrane separation performance limited separation coefficient and permeation, limited application, high cost, etc., to achieve good results Recyclable ability, excellent capture ability, simple method effect

Active Publication Date: 2019-09-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the separation performance of polymer membranes is limited by the widely existing contradictory relationship between separation coefficient and permeability, which limits its industrial application.
Although porous inorganic materials can be physically adsorbed or sieved by size, they will not be restricted by the contradiction between separation coefficient and permeation flux, and can obtain high permeation flux and gas separation coefficient at the same time, but their cost is too high to be achieved. conducive to practical application

Method used

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  • MOF (metal-organic framework) derived gas separation membrane as well as preparation method and application thereof
  • MOF (metal-organic framework) derived gas separation membrane as well as preparation method and application thereof
  • MOF (metal-organic framework) derived gas separation membrane as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Weigh 0.37gH 3 BTC solution and 0.75gAl(NO 3 ) 3 ·9H 2 O, dissolved in 10 mL of deionized water, adjusted the pH of the system to 1.9 to 2.0, and added 0.21 mL of methanol solution to obtain a mixed solution. After cleaning with ionized water, bright yellow MIL-100Al powder was obtained;

[0034] (2) Weigh 0.46 g of dried MIL-100Al powder and 0.94 g of triblock copolymer (poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide)) (Pluronic F- 127Sigma-Aldrich) was dissolved in 5 mL of absolute ethanol at room temperature and under ultrasonic conditions, then 0.1 mL of 37% wt HCl solution was added, and ultrasonically mixed for 24 h at room temperature; After cooling and washing with deionized water, a solid mixture was obtained after drying under vacuum at 80 °C for 24 h; the mixture was heated at 700 °C under N 2 Carbonized at high temperature for 3 h under protection, washed and dried with water and HCl after cooling, to obtain clean MIL-100Al porous carb...

Embodiment 2

[0037] Keeping other conditions the same, heat the mixture from step 2 at 600 °C, N 2 The MIL-100Al porous carbon material obtained by carbonization at high temperature under protection for 3h is used to prepare gas separation membranes under the same test conditions. CO at 1Bar, 298K 2 The loading is 4.4 mmol / g; and for CO 2 and CH 4 The separation selectivity is good, reaching 13.7 at 1Bar and 298K.

Embodiment 3

[0039] Keeping other conditions the same, heat the mixture from step 2 at 800 °C, N 2 The MIL-100Al porous carbon material obtained by carbonization at high temperature under protection for 3h is used to prepare gas separation membranes under the same test conditions. CO at 1Bar, 298K 2 The loading is 4.3 mmol / g; and for CO 2 and CH 4 The separation selectivity is good, reaching 13.7 at 1Bar and 298K.

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Abstract

The invention discloses an MOF (metal-organic framework) derived gas separation membrane as well as a preparation method and application thereof. The preparation method of the MOF derived gas separation membrane comprises the following steps: dissolving H3BTC and Al(NO3)3*9H2O into deionized water, adjusting the pH value of the system to 1.9-2.0, adding aids, carrying out a complete reaction so as to obtain MIL-100Al and a triblock copolymer, dissolving the MIL-100Al and the triblock copolymer into an alcohol at room temperature under an ultrasonic condition, adding the components into a 37wt% hydrochloric acid solution, carrying out ultrasonic mixing for 24 hours at room temperature, further carrying out a copolymerization reaction for 24 hours at 100-120 DEG C so as to obtain a solid mixture after the reaction is completed, carrying out high-temperature carbonization so as to obtain an MIL-100Al porous carbon material, dissolving the MIL-100Al porous carbon material into an NMP (N-methyl pyrrolidone) solution, carrying out mixing and stirring so as to obtain a clear and uniform viscous solution, and carrying out casting, so as to obtain the MOF derived gas separation membrane. The prepared membrane structure has rich micropores, has an outstanding CO2 capturing capability at normal pressure, in addition has good separation selectivity upon CO2 and CH4, has a good circulation use capability, and provides valuable references for application of an MOF derived material in the field of membrane materials.

Description

technical field [0001] The invention relates to a MOF-derived gas separation membrane, a preparation method and application thereof, and belongs to the technical field of porous membrane preparation and gas separation application. Background technique [0002] Membrane gas separation technology is mainly used to remove nitrogen in air and CO in natural gas 2 , hydrogen in petroleum refinery gas, and the separation of olefin / paraffin mixtures have been widely used. Compared with the traditional low temperature distillation and chemical adsorption processes, the membrane separation process has a good development prospect in gas separation due to its high energy efficiency, easy scale and environmental protection. However, the separation performance of polymer membranes is limited by the widely existing contradictory relationship between separation coefficient and permeation, limiting their industrial applications. Although porous inorganic materials can be sieved by physical...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D69/02B01D67/00B01D53/22
CPCB01D53/228B01D67/0079B01D69/02B01D71/06B01D2256/245B01D2257/504Y02C20/40
Inventor 张国亮叶镭范铮孟琴秦磊
Owner ZHEJIANG UNIV OF TECH
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