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Formed MOF material and preparation method and application thereof

A powder, metal organic framework technology, applied in the field of molding MOFs materials and its preparation, can solve the problems of easy blockage of internal pores, difficult regeneration, easy wear heat/quality, etc., and achieve the effect of preventing mass loss and crushing, and simple molding method.

Pending Publication Date: 2022-02-15
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the products of conventional MOFs preparation methods are usually crystalline powders, and powdered MOFs are difficult to be directly applied to the field of industrial adsorption separation, because the pressure will drop significantly when the gas flows through the adsorption bed, and the mechanical strength of powdered MOFs is not ideal. Wear and generate heat / mass loss, internal pores are prone to blockage, difficult to regenerate

Method used

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  • Formed MOF material and preparation method and application thereof
  • Formed MOF material and preparation method and application thereof
  • Formed MOF material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 1-Figure 3 , a shaped MOFs material comprising a metal-organic framework Al-CDC with a spherical appearance and a well-defined crystal structure.

[0040] The mass proportion of Al in the formed MOFs material is 12.7%, the mass proportion of CDC is 83.6%, and the balance is inorganic substances, including sodium alginate and calcium chloride.

[0041] The specific surface area of ​​the molded MOFs material is 364m 2 g -1 .

[0042] A method for preparing a shaped MOFs material, comprising the steps of:

[0043]S1: Mix 14.48g of aluminum chloride hexahydrate (60mmol), 10.02g of trans-1,4 cyclohexanedicarboxylic acid (6mmol), 320mL of DMF and 80mL of deionized water, and stir for 5min in an oil bath at 130°C , a white precipitate appeared, and the precipitated sample was collected by suction filtration, washed with DMF and acetone several times, and dried in an oven at 100 ° C to obtain a white dry MOFs powder;

[0044] S2: Add 5 mL of deionized water...

Embodiment 2

[0047] A shaped MOFs material, including metal-organic framework Al-CDC, is spherical in appearance and has a good crystal structure.

[0048] The mass proportion of Al in the formed MOFs material is 14.6%, the mass proportion of CDC is 80.2%, and the balance is inorganic substances, including sodium alginate and calcium chloride.

[0049] The specific surface area of ​​the molded MOFs material is 377m 2 g -1 .

[0050] A method for preparing a shaped MOFs material, comprising the steps of:

[0051] S1: Mix 15.93g of aluminum chloride hexahydrate (66mmol), 10.02g of trans-1,4 cyclohexanedicarboxylic acid (6mmol), 330mL of DMF and 66mL of deionized water, and stir in an oil bath at 120°C for 8min , a white precipitate appeared, and the precipitated sample was collected by suction filtration, washed with DMF and acetone several times, and dried in an oven at 90°C to obtain a white dry MOFs powder;

[0052] S2: Add 4 mL of deionized water to the mixture of 5 g of the product ...

Embodiment 3

[0055] A shaped MOFs material, including metal-organic framework Al-CDC, is spherical in appearance and has a good crystal structure.

[0056] The mass proportion of Al in the formed MOFs material is 13.1%, the mass proportion of CDC is 82.2%, and the balance is inorganic substances, including sodium alginate and calcium chloride.

[0057] The specific surface area of ​​the molded MOFs material is 351m 2 g -1 .

[0058] A method for preparing a shaped MOFs material, comprising the steps of:

[0059] S1: Mix 13.03g of aluminum chloride hexahydrate (54mmol), 10.02g of trans-1,4 cyclohexanedicarboxylic acid (6mmol), 324mL of DMF and 81mL of deionized water, and stir in an oil bath at 140°C for 10min , a white precipitate appeared, and the precipitated sample was collected by suction filtration, washed with DMF and acetone several times, and dried in an oven at 120 ° C to obtain a white dry MOFs powder;

[0060] S2: Add 7 mL of deionized water to the mixture of 5 g of the prod...

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Abstract

The invention relates to the technical field of nanometer porous materials, in particular to a formed MOF material as well as a preparation method and application thereof. The formed MOF material provided by the invention comprises a metal organic framework Al-CDC, is spherical in appearance and has a good crystal structure; MOF powder is formed by a calcium alginate method, the forming method can easily prepare MOFs with various morphologies on a large scale, and the adsorption performance of the formed MOF material is slightly reduced or even leveled compared with the adsorption performance of a powder material, but is greatly improved in mechanical properties; and thus, a new thought is provided for a MOF forming process, and a solution is provided for commercial and industrial application of the MOFs.

Description

technical field [0001] The invention relates to the technical field of nanoporous materials, in particular to a shaped MOFs material and its preparation method and application. Background technique [0002] Methane is a greenhouse gas with a global warming potential (GWP) 21 times that of carbon dioxide. As a primary energy source, methane is clean and environmentally friendly compared with other fossil fuels, and has been widely used in residential and industrial fields. Methane can be obtained from a variety of sources, including shale gas, landfill gas, low-grade natural gas, agricultural waste gas, and coal mine methane waste. due to N 2 and CH 4 have the same physical properties as CH 4 and N 2 Difficult to separate. Therefore, a large amount of methane-containing gas is difficult to use and is directly discharged into the atmosphere, especially low-concentration coalbed methane is often directly discharged into the environment, causing serious air pollution and g...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30B01D53/02
CPCB01J20/226B01J20/24B01J20/046B01J20/28011B01J20/28019B01J20/28061B01D53/02
Inventor 刘大欢郭彭涛
Owner BEIJING UNIV OF CHEM TECH
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