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Two-dimensional polymer-based porous carbon materials and their preparation and applications

A technology of porous carbon materials and polymers, applied in the preparation/purification of carbon, carbon compounds, other chemical processes, etc., can solve the problems of not significantly improving the carbon dioxide adsorption capacity of the material, increasing the specific surface area, and poor adsorption capacity, etc. Achieve the effects of low production cost, simple synthesis process and convenient method

Active Publication Date: 2020-04-21
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, simply increasing the specific surface area cannot significantly improve the carbon dioxide adsorption capacity of the material, especially at around 60°C (flue gas)
However, most of the current carbon dioxide adsorption materials based on physical adsorption have poor carbon dioxide adsorption capacity under high temperature conditions. High temperature adsorption mainly depends on the limitation of chemical adsorption, and the regeneration process based on chemical adsorption materials consumes a lot of energy.

Method used

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  • Two-dimensional polymer-based porous carbon materials and their preparation and applications
  • Two-dimensional polymer-based porous carbon materials and their preparation and applications
  • Two-dimensional polymer-based porous carbon materials and their preparation and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Synthesis of pyrene-based two-dimensional polymers

[0045] Accurately weigh pyrene (1.5g, 7.4mmol) and aluminum trichloride (5.92g, 44.4mmol) into a 100mL double-necked round-bottomed flask, pass nitrogen gas for 15min, and then add 30mL CHCl 3, stirred at room temperature for 15 min, then raised the reaction temperature to 58° C., and reacted for 3 days. In addition, the molar ratio of pyrene to aluminum trichloride (in the range of 1:3-1:8) can be changed to prepare pyrene-based two-dimensional polymers with different specific surface areas. The product is post-treated, and the specific method is as follows: add the product to a 3mol / L KOH solution, stir at room temperature, and wait until the massive solid is completely dispersed, use a Buchner funnel for suction filtration, use a large amount of ethanol during the suction filtration process, and deionize Washed with water, then dried at 70°C, the dried product was subjected to Soxhlet extraction with ethanol a...

Embodiment 2

[0055] (1) Synthesis of naphthyl two-dimensional polymers

[0056] Naphthalene (1.28g, 10mmol) and dimethoxymethane (2.6-5.2ml, 30-60mmol) were dissolved in 20ml of 1,2-dichloroethane, and anhydrous ferric chloride (4.86-9.72g, 30- 60mmol), stirred evenly at room temperature. Then the temperature was raised to 25-80°C and stirred for 24-36h. After the reaction is completed, filter and post-process the product. The specific method is as follows: add the product to a 3mol / L hydrochloric acid solution, stir at room temperature, and wait until the massive solids are completely dispersed, then use a Buchner funnel to carry out suction filtration. A large amount of water and methanol, deionized water are washed, and the product adopts anhydrous methanol to carry out Soxhlet extraction, and the time is 3 days, and the productive rate is more than 95% (wt), carries out EDS elemental analysis to the product finally obtained, and iron ion content is lower than 5wt%. In this embodimen...

Embodiment 3

[0063] According to the method of Example 2 step (1) to prepare phenyl two-dimensional polymer, the difference is that naphthalene is replaced by equimolar benzene, and the product structural formula is as follows:

[0064]

[0065] m and n represent the number of repeating units, and the specific surface area of ​​the product is 800-1200m 2 / g.

[0066] Then, the phenyl porous carbon material was prepared according to the method of step (2) of Example 1, except that sodium chloride was selected as the pore-forming agent, and the carbonization temperature was 600°C.

[0067] The phenyl porous carbon material prepared in this example can also absorb CO at 0-90°C 2 , CO 2 The pressure is 0.015-0.1MPa, at 60-90℃ for CO 2 Still have good adsorption capacity.

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Abstract

The invention relates to a porous carbon material based on two-dimensional polymer and preparation method thereof. The preparation method comprises the following steps: mixing the two-dimensional aromatic polymer and pore-forming agent uniformly according to the mass ratio of 1:3-6, then carbonizing in an inert atmosphere at 400-1,000 DEG C, and obtaining porous carbon materials based on the two-dimensional polymer after the reaction. The porous carbon material based on the two-dimensional polymer has hydrophobic property, can physically adsorb CO2 at high temperature (60-90 DEG C), can be recycled at room temperature, and has simple and convenient recycling operation.

Description

technical field [0001] The invention relates to the field of porous carbon material preparation technology and gas adsorption technology, in particular to a two-dimensional polymer-based porous carbon material and its preparation and application. Background technique [0002] The emission of carbon dioxide produced by industrial production and human life is increasing year by year. The resulting greenhouse effect triggers global warming, sea level rise, and extinction of animals and plants, which will directly threaten the ecological environment and social economy. Therefore, it is imminent to design and prepare materials with carbon dioxide capture and storage properties. Theoretically, the improvement of carbon dioxide adsorption performance mainly depends on the high specific surface area, large micropore volume and suitable heat of adsorption of the adsorbent. However, simply increasing the specific surface area cannot significantly improve the carbon dioxide adsorption...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05C01B32/50B01J20/20
CPCB01J20/20C01B32/05C01B32/50
Inventor 吴铎徐丹齐浩军严锋
Owner SUZHOU UNIV
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