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MOF derived gas separation membrane and its preparation method and application

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

Active Publication Date: 2021-11-19
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 derived gas separation membrane and its preparation method and application
  • MOF derived gas separation membrane and its preparation method and application
  • MOF derived gas separation membrane and its preparation method and application

Examples

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 10mL of deionized water, adjust the pH of the system to 1.9-2.0, add 0.21mL of methanol solution to obtain a mixed solution, heat the mixed solution at 200°C for 6h, cool it at room temperature, and use dilute nitric acid and deionized Bright yellow MIL-100Al powder is obtained after washing with ionized water;

[0034] (2) Weigh 0.46g of dried MIL-100Al powder and 0.94g of triblock copolymer (poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide)) (Pluronic F- 127Sigma-Aldrich) was dissolved in 5mL of absolute ethanol at room temperature under ultrasonic conditions, and then 0.1mL of 37%wt HCl solution was added, and ultrasonically mixed at room temperature for 24h; then copolymerized at 120°C for 24h, after the reaction was complete, After cooling and washing with deionized water, and then drying under vacuum at 80°C for 24h, a solid mixture was obtained; the mixture was heated at 700...

Embodiment 2

[0037] While keeping other conditions the same, the mixture in step 2 was heated at 600°C, N 2 Under the protection of high temperature carbonization for 3 hours, the obtained MIL-100Al porous carbon material is used to prepare gas separation membranes, and the test conditions are the same. CO at 1Bar, 298K 2 The loading capacity is 4.4mmol / g; and for CO 2 and CH 4 The separation selectivity is good, reaching 13.7 at 1Bar, 298K.

Embodiment 3

[0039] While keeping other conditions the same, the mixture in step 2 was heated at 800°C, N 2 Under the protection of high temperature carbonization for 3 hours, the obtained MIL-100Al porous carbon material is used to prepare gas separation membranes, and the test conditions are the same. CO at 1Bar, 298K 2 The loading capacity is 4.3mmol / g; and for CO 2 and CH 4 The separation selectivity is good, reaching 13.7 at 1Bar, 298K.

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Abstract

The invention discloses a MOF-derived gas separation membrane and its preparation method and application. The preparation method of the MOF-derived gas separation membrane is as follows: H 3 BTC and Al(NO 3 ) 3 9H 2 Dissolve O in deionized water, adjust the pH of the system to 1.9-2.0, and add additives, the reaction is complete to obtain MIL-100Al and tri-block copolymer Dissolve in alcohol at room temperature and under ultrasonic conditions, and then add 37%wt hydrochloric acid solution In the process, ultrasonically mix at room temperature for 24 hours, and then copolymerize at 100°C to 120°C for 24 hours. After the reaction is complete, a solid mixture is obtained, which is carbonized at a high temperature to obtain a MIL‑100Al porous carbon material, which is then dissolved in NMP solution, mixed and stirred A clear and uniform viscous solution was obtained, which was then casted to obtain a MOF-derived gas separation membrane. The prepared membrane structure is rich in micropores, and the CO 2 Excellent capture ability, and CO 2 and CH 4 It has good separation selectivity and good recycling ability, which provides a valuable reference for the application of MOF derived materials 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-up and environmental protection. 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 a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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