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A preparation method and application of an organic-inorganic mixed matrix membrane doped with a zeolite imidazolate framework porous carbon nanomaterial

A technology of zeolite imidazolate and mixed matrix membrane, which is applied in the direction of separation methods, chemical instruments and methods, membrane technology, etc., to achieve the effects of strong adsorption capacity, improved permeability, and accelerated delivery

Active Publication Date: 2020-11-20
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polymer membranes have a trade-off effect between gas permeability and selectivity, that is, the increase in permeability is at the expense of selectivity, and vice versa
However, the separation performance of inorganic membranes far exceeds the Robeson upper limit.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: prepare the mixed matrix membrane that adds the zeolite imidazolate material of 1.5wt% nickel doping, the steps are as follows:

[0032] Step 1, the preparation of the zeolite imidazolate material doped with nickel:

[0033]Dissolve zinc nitrate hexahydrate, nickel nitrate hexahydrate, and 2-methylimidazole in methanol solution to prepare solutions with concentrations of 0.1mol / L, 0.1mol / L, and 0.8mol / L, respectively, and then put them into 4A molecular sieves Leave standstill 12h to remove excess moisture, obtain the methanol solution (named solution A) of zinc nitrate hexahydrate, the methanol solution (named solution B) of nickel nitrate hexahydrate and the methanol solution (named solution C) of 2-methylimidazole ); then, pour solution A, solution B and solution C into a three-necked flask, stir at 30°C for 48 hours to undergo a chemical reaction, centrifuge the resulting solution for 20 minutes at a speed of 10,000 rpm, and wash the lower precipitate ...

Embodiment 2

[0039] Embodiment 2: Prepare the mixed matrix membrane that adds 1.5wt% zeolite imidazolate framework porous carbon nanomaterial, the steps are as follows:

[0040] Step 1, the preparation of the zeolite imidazolate material doped with nickel:

[0041] Dissolve zinc nitrate hexahydrate, nickel nitrate hexahydrate, and 2-methylimidazole in methanol solution to prepare solutions with concentrations of 0.1mol / L, 0.1mol / L, and 0.8mol / L, respectively, and then put them into 4A molecular sieves Leave standstill 12h to remove excess moisture, obtain the methanol solution (named solution A) of zinc nitrate hexahydrate, the methanol solution (named solution B) of nickel nitrate hexahydrate and the methanol solution (named solution C) of 2-methylimidazole ); then, pour solution A, solution B and solution C into a three-necked flask, stir at 30°C for 48 hours to undergo a chemical reaction, centrifuge the resulting solution for 20 minutes at a speed of 10,000 rpm, and wash the lower prec...

Embodiment 3

[0049] Embodiment 3: preparation adds the mixed matrix membrane of 0.5wt% zeolite imidazolate framework porous carbon nanomaterial, steps are as follows:

[0050] Step 1, the preparation of the zeolite imidazolate material doped with nickel:

[0051] Dissolve zinc nitrate hexahydrate, nickel nitrate hexahydrate, and 2-methylimidazole in methanol solution to prepare solutions with concentrations of 0.1mol / L, 0.1mol / L, and 0.8mol / L, respectively, and then put them into 4A molecular sieves Leave standstill 12h to remove excess moisture, obtain the methanol solution (named solution A) of zinc nitrate hexahydrate, the methanol solution (named solution B) of nickel nitrate hexahydrate and the methanol solution (named solution C) of 2-methylimidazole ); then, pour solution A, solution B and solution C into a three-necked flask, stir at 30°C for 48 hours to undergo a chemical reaction, centrifuge the resulting solution for 20 minutes at a speed of 10,000 rpm, and wash the lower precip...

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Abstract

The invention discloses a preparation method and application of an organic-inorganic mixed matrix membrane doped with a zeolite imidazate framework porous carbon nano material. The preparation methodcomprises the following steps: selecting zinc nitrate hexahydrate, nickel nitrate hexahydrate and 2-methyl imidazole as raw materials, and preparing a zeolite imidazate material containing nickel through a solvothermal method; taking the nickel-doped zeolite imidazate material as a precursor, and roasting at a high temperature of 700-1000 DEG C to prepare the zeolite imidazate framework porous carbon nano material; dispersing the porous carbon nano material into a polyether copolyamide solution to prepare an uniform casting membrane solution, and preparing the mixed matrix membrane doped withthe zeolite imidazate framework porous carbon nano material through a solvent evaporation method, wherein thickness of the wet membrane is 50-500 mu m. The inorganic material is simple and easily available, the membrane preparation method is easy to operate, the mixed matrix membrane is used for CO2 separation, and the added inorganic material can effectively increase a CO2 permeability coefficient and a CO2 / N2 separating factor of the polyether polyamide membrane.

Description

technical field [0001] The invention relates to a preparation method and application of an organic-inorganic mixed matrix membrane doped with a zeolite imidazolate skeleton porous carbon nanomaterial, and belongs to the technical field of gas separation membranes. Background technique [0002] With the development of industrial technology and the growth of population, the problem of global warming has attracted people's attention. Therefore, in order to reduce CO 2 Emissions into the atmosphere, using efficient methods to capture CO before or after fossil fuel combustion 2 is imminent. In general, the separation of CO from a gas mixture 2 The methods mainly include chemical adsorption, physical adsorption, cryogenic separation, membrane separation and so on. Membrane separation technology is often used to separate CO due to its advantages of high efficiency, strong adaptability, simple operation, low energy consumption, low investment, and environmental friendliness. 2 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D71/80B01D53/22
CPCB01D53/228B01D67/0079B01D71/80Y02C20/40
Inventor 王永洪张新儒李龙张桃刘成岑
Owner TAIYUAN UNIV OF TECH