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A kind of porous carbon-based adsorbent for gas adsorption and preparation method thereof

A gas adsorption, porous carbon technology, applied in separation methods, chemical instruments and methods, reagents, etc., can solve problems such as warming and environmental pollution, and achieve the effects of short synthesis cycle, rich pore structure, and simple preparation method

Active Publication Date: 2021-09-24
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, economic development has also brought many problems, especially the large amount of greenhouse gases (carbon dioxide) produced during the use of fossil fuels; the greenhouse effect brought by these greenhouse gases leads to global warming, acid rain, extreme weather and other environmental problems. pollution problem

Method used

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  • A kind of porous carbon-based adsorbent for gas adsorption and preparation method thereof
  • A kind of porous carbon-based adsorbent for gas adsorption and preparation method thereof
  • A kind of porous carbon-based adsorbent for gas adsorption and preparation method thereof

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Embodiment approach

[0051] According to the second embodiment provided by the present invention, a method for preparing a porous carbon-based adsorbent for gas adsorption is provided.

[0052] A method for preparing a porous carbon-based adsorbent for gas adsorption or a method for preparing the porous carbon-based adsorbent for gas adsorption described in the first embodiment, the method comprising the following steps:

[0053] (1) Preparation of 3,6-bis(4-methyl-1H-imidazolyl)-1,2,4,5-tetrazine (BMIT): 3,6-bis(3,5-dimethyl Pyrazole)-1,2,4,5-tetrazine (BDMT) and 4-methylimidazole (4-MI) are loaded into the reactor, heated for a period of time, cooled, filtered by suction, and dried to obtain 3, 6-bis(4-methyl-1H-imidazolyl)-1,2,4,5-tetrazine (BMIT);

[0054] (2) Preparation of zinc-based metal-organic framework (Zn-MOF): 3,6-bis(4-methyl-1H-imidazolyl)-1,2,4,5-tetrazine was dissolved in an organic solvent, Add metal zinc salt, after dispersion, heat and react for a period of time, after coolin...

Embodiment 1

[0066] A method for preparing a porous carbon-based adsorbent for gas adsorption, the method comprising the following steps:

[0067](1) Preparation of 3,6-bis(4-methyl-1H-imidazolyl)-1,2,4,5-tetrazine (BMIT): 3,6-bis(3,5-dimethyl Pyrazole)-1,2,4,5-tetrazine (BDMT) and 4-methylimidazole (4-MI) are loaded into the reactor, heated for a period of time, cooled, filtered by suction, and dried to obtain 3, 6-bis(4-methyl-1H-imidazolyl)-1,2,4,5-tetrazine (BMIT);

[0068] (2) Preparation of zinc-based metal-organic framework (Zn-MOF): 3,6-bis(4-methyl-1H-imidazolyl)-1,2,4,5-tetrazine was dissolved in an organic solvent, Add metal zinc salt, after dispersion, heat and react for a period of time, after cooling, filter with suction, wash, and dry to obtain a brown solid, which is zinc-based metal organic framework polymer (Zn-MOF);

[0069] (3) Preparation of porous carbon-based adsorbent for gas adsorption: the zinc-based metal-organic framework (Zn-MOF) obtained in step (2) was heat...

Embodiment 2

[0071] Preparation of 3,6-bis(4-methyl-1H-imidazolyl)-1,2,4,5-tetrazine (BMIT):

[0072] 4.05g 3,6-bis(3,5-dimethylpyrazole)-1,2,4,5-tetrazine (BDMT) was added into a three-necked flask equipped with a reflux device filled with 60ml of acetonitrile. After stirring evenly at room temperature, add 10 ml of acetonitrile solution in which 2.73 g of 4-methylimidazole (4-MI) is dissolved, and then slowly feed N 2 Protect, raise the temperature to 80°C and reflux for 3 hours, cool in an ice bath, filter, wash the product with acetonitrile and dichloromethane, and dry it in vacuum to constant weight to obtain the target product.

[0073] figure 1 A synthetic route for the preparation of 3,6-bis(4-methyl-1H-imidazolyl)-1,2,4,5-tetrazine (BMIT).

[0074] figure 2 It is the 1H NMR chart of the ligand 3,6-bis(4-methyl-1H-imidazolyl)-1,2,4,5-tetrazine (BMIT).

[0075] image 3 It is the mass spectrum of the ligand 3,6-bis(4-methyl-1H-imidazolyl)-1,2,4,5-tetrazine (BMIT).

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Abstract

The invention provides a porous carbon-based adsorbent for gas adsorption. The porous carbon-based adsorbent is prepared by the following preparation method: first passing 3,6-bis(3,5-dimethylpyrazole)- 1,2,4,5‑tetrazine (BDMT) and 4‑methylimidazole (4‑MI) undergo nucleophilic substitution reaction to synthesize 3,6‑bis(4‑methyl‑1H‑imidazolyl) with high nitrogen content )‑1,2,4,5‑tetrazine (BMIT), then coordinate 3,6‑bis(4‑methyl‑1H‑imidazolyl)‑1,2,4,5‑tetrazine with the zinc ion Zinc-based metal-organic framework (Zn‑MOF) is formed, and the zinc-based metal-organic framework polymer is then thermally treated to prepare a porous carbon-based adsorbent for gas adsorption. The preparation process of the adsorbent is simple, the cost is low, and it is beneficial to the practical application of carbon dioxide gas adsorption materials.

Description

technical field [0001] The invention relates to an adsorbent, in particular to a porous carbon-based adsorbent for gas adsorption and a preparation method thereof, belonging to the field of gas adsorption materials. Background technique [0002] With the economic development of society and the improvement of human's living standard, people's demand for traditional fossil fuels (oil, natural gas, coal) is gradually increasing. However, economic development has also brought many problems, especially the large amount of greenhouse gases (carbon dioxide) produced during the use of fossil fuels; the greenhouse effect brought by these greenhouse gases leads to global warming, acid rain, extreme weather and other environmental problems. pollution problem. According to data surveys, benefiting from energy-efficient technologies and low-carbon promotion, global carbon emissions remained stable from 2014 to 2016, but rebounded from 2017 to 2018. Since the development of low-carbon te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02C08G83/00
CPCB01D53/02B01D2253/102B01J20/0259B01J20/20B01J2220/4806B01J2220/4812C08G83/008Y02P20/151Y02C20/40
Inventor 黎华明白亚峰杨端光陈红飙
Owner XIANGTAN UNIV