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Composite carbon dioxide adsorption material, preparation method and application thereof

A carbon dioxide, adsorption material technology, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve problems such as weak adsorption and separation capabilities, achieve high selectivity, overcome volatile, and large porosity.

Active Publication Date: 2014-09-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, when MOFs are used as carbon dioxide adsorbents, they need to be carried out at medium and high pressures, while CO 2 The adsorption and separation abilities are weak

Method used

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  • Composite carbon dioxide adsorption material, preparation method and application thereof
  • Composite carbon dioxide adsorption material, preparation method and application thereof
  • Composite carbon dioxide adsorption material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Dissolve 3.28g of terephthalic acid, 8g of chromium nitrate, and 0.25ml of hydrofluoric acid in a 200ml autoclave filled with 140ml of water, add 10g of carbon nanotubes, ultrasonicate for 0.5h, and react at 220°C for 8h. Cool naturally to room temperature, filter, wash, and dry to obtain MOFs-carbon nanotube composite material, referred to as (M-C)1.

[0053] Dissolve 1g of tetraethylenepentamine in 100ml of absolute ethanol, add 1g of (M-C)1 after stirring for 0.5h, stir for 4h, put the sample in an oven, dry at 80°C to remove ethanol, and then dry at 105°C. In the obtained sample, the content of organic amine is 50wt%, which is recorded as (M-C)1-50. The adsorption data was measured by using a fixed bed. The adsorption temperatures were 20, 30, 40, 50, 60, 70, and 80°C, and the simulated gas flow was 50ml / min. The results are shown in Table 1.

Embodiment 2

[0060] Same as Example 1, except that carbon nanotubes are replaced by graphene, which is recorded as (M-C)2-50. CO 2 The test conditions of adsorption performance are the same as in Example 1, and the results are shown in Table 1.

Embodiment 3

[0064] Dissolve 3.28g of terephthalic acid, 8g of chromium nitrate, and 0.25ml of hydrofluoric acid in a 200ml autoclave filled with 140ml of water, add 15g of carbon nanotubes, ultrasonicate for 0.5h, and react at 220°C for 8h. Cool naturally to room temperature, filter, wash, and dry to obtain MOFs-carbon nanotube composite material, referred to as (M-C)3.

[0065] Dissolve 1g of polyethyleneimine in 100ml of absolute ethanol, stir for 0.5h, add 4g of (M-C)3, stir for 4h, put the sample in an oven, dry at 80°C to remove ethanol, and then dry at 105°C. In the obtained sample, the content of organic amine is 20wt%, which is recorded as (M-C)3-20. The adsorption data was measured by using a fixed bed, the adsorption temperature was 70°C, and the simulated gas flow rate was 50ml / min. The results are shown in Table 1.

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Abstract

The invention discloses a composite carbon dioxide adsorption material, which includes an in-situ synthesized MOFs(metal-organic frameworks)-graphite based composite material and organic amine loaded on the MOFs-graphite based composite material. The mass ratio of the MOFs-graphite based composite material to the organic amine is 0.1-10:1. The composite carbon dioxide adsorption material provided by the invention realizes the combined action of physical adsorption and chemical adsorption, can adsorb and store carbon dioxide at medium and low temperature, and realizes regeneration and reuse of the adsorbent under certain conditions. The composite carbon dioxide adsorption material has good adsorption capacity, high selectivity and cycling stability on carbon dioxide, and can overcome the disadvantages of easy volatilization and easy corrosion of equipment in organic amine so as to meet the industrial processing requirements. The invention also discloses a preparation method of the composite carbon dioxide adsorption material and application in adsorption of carbon dioxide in flue gas.

Description

technical field [0001] The invention relates to the field of preparation of carbon dioxide adsorbents, in particular to a composite carbon dioxide adsorbent material and its preparation method and application. Background technique [0002] In recent years, the increasing use of fossil fuels has resulted in CO 2 Emissions continue to increase. Over the past 250 years, atmospheric CO 2 The concentration increased from 280ppm before the industrial revolution to 390ppm in 2010, especially in the past 50 years. Its excessive emissions have caused global warming, seriously affecting the earth's ecological environment and climate change. Therefore, CO 2 Emission reduction has also become an urgent issue. The development of low-carbon new energy and the improvement of existing energy efficiency are both CO 2 effective way to reduce emissions, while CO 2 Capture and separation technology is undoubtedly an effective way to reduce CO 2 emission technology. [0003] Carbon diox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/81
CPCY02C20/40
Inventor 施耀刘清何奕
Owner ZHEJIANG UNIV
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