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Metal-organic framework (MOF) material for permeating and separating gases and preparation method thereof

An organic framework and gas separation technology, applied in separation methods, semi-permeable membrane separation, dispersed particle separation, etc., can solve the problems of poor film thickness and compactness, high permeation flux, high separation selectivity, etc. question

Active Publication Date: 2015-05-20
宁波大膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of materials for preparing high-efficiency permeation and separation membranes and the inability to form a good connection between membrane materials and substrates, the permeability and separation coefficient of MOF membranes are still low, and the thickness and compactness of the membranes have not been greatly improved. Good improvement, cannot have high permeation flux and high separation selectivity at the same time

Method used

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  • Metal-organic framework (MOF) material for permeating and separating gases and preparation method thereof
  • Metal-organic framework (MOF) material for permeating and separating gases and preparation method thereof
  • Metal-organic framework (MOF) material for permeating and separating gases and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0068] The preparation method of the metal-organic framework material film of the present invention comprises steps:

[0069] (i) introducing a metal-organic framework material seed crystal with a functional group on the substrate, thereby forming a substrate having a metal-organic framework material seed crystal with a functional group attached to the surface; and,

[0070] (ii) Place the substrate obtained in step (i) with the seed crystals of metal-organic framework materials with functional groups attached to its surface in the reaction system to perform a secondary film-forming reaction, thereby forming the metal organic framework material described in the present invention. - Membranes of organic framework materials.

[0071] Preferably, the steps include:

[0072] (i-1) providing a metal-organic framework material with functional groups;

[0073] Wherein, the preparation method of the metal-organic framework material with functional groups is a method commonly used by...

Embodiment 1

[0102] Embodiment 1MOF material film (NH 2 -MIL-53 film No.1)

[0103] (1.1) MOF materials (NH 2 - Synthesis of MIL-53 material):

[0104] Aluminum nitrate, aminoterephthalic acid (NH 2 -BDC), deionized water according to the molar ratio: Al 3+ : NH 2 -BDC:H 2 O=1:1:139 mixed, stirred, ultrasonically oscillated, impregnated or a combination of the three methods, prepared into a uniform solution, and synthesized at 150 ° C for 5 hours, then filtered and centrifuged, dried and dried to form NH 2 - MIL-53 material powder, as seed crystal.

[0105] NH 2 -X-ray diffraction pattern and scanning electron microscope picture of MIL-53 material image 3 and Figure 4 Shown: The relative peak intensities in the X-ray diffraction pattern show that NH 2 -The crystallinity of MIL-53 grains is good, and there are no other impurity phases, and the prepared NH 2 - The scanning electron microscope image of the MIL-53 crystal grains shows that the morphology of the grains is relativel...

Embodiment 2-6

[0135] Embodiment 2-6MOF material film (NH 2 -MIL-53 film) No.2-6

[0136] Repeat Example 1, the difference is that the conditions or parameters described in Table 2 are used to replace the corresponding conditions or parameters in Example 1.

[0137] Table 2

[0138]

[0139] The test results show that within the error range, the prepared MOF material film (NH 2 -MIL-53 membrane) No.2-6 has similar gas permeation separation performance, and the hydrogen permeability of the membrane is 1.3×10 -5 to 2.0×10 -5 molm -2 Pa -1 the s -1 within range.

[0140] discuss:

[0141] The test results of embodiment 1 and comparative examples 1, 2, 3 are as shown in table 1, and it can be seen that: the film prepared by the method of the present invention has excellent performance, especially, its H 2 The penetration is significantly better than the existing technology (the penetration is about an order of magnitude improved), and its H 2 / CO 2 and H 2 / CH 4 The ideal separat...

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Abstract

The invention discloses a metal-organic framework (MOF) material for permeating and separating gases and a preparation method thereof. Specifically, an MOF film disclosed by the invention is provided with a functional group, which contributes to nucleating on a substrate, increase the nucleating density on the substrate and contributes to the growth of a dense film; and the functional group can coact with certain specific gases, so that selective permeation of gases is facilitated. Due to the adoption of a film preparation method disclosed by the invention, the growing process of the film is simplified, the structure and shape of the film are optimized simultaneously, and film permeating and separating performance is enhanced. The MOF film prepared with the method has the advantages of high permeation amount, high separating coefficient, low energy consumption and avoidance of secondary pollution, and is particularly suitable for permeating and separating gases such as H2, CO2, CH4 and the like.

Description

technical field [0001] The invention belongs to the technical field of permeation and separation of gas, in particular, relates to a metal-organic framework material membrane for permeation and separation of gas and a preparation method thereof, more specifically, relates to a metal-organic framework material film with functional groups for permeation and separation of gas Framework material film and its preparation method. Background technique [0002] Due to the emission of greenhouse gases and energy gases, such as CO 2 、H 2 etc., the preparation and application of high-efficiency gas permeation separation materials are urgently needed, and the gas permeation separation membrane technology is considered to be one of the most promising new technologies in the 21st century. Compared with traditional adsorption refrigeration and condensation separation, gas separation membrane technology has the advantages of high efficiency, energy saving, convenient use, simple operation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/06B01D67/00B01D53/22
CPCY02C20/40
Inventor 孔春龙范海燕陈亮夏海平
Owner 宁波大膜科技有限公司