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Preparation method and application of super-molecular carbon dioxide adsorbent used in solid and liquid states

A technology of carbon dioxide and supramolecules, applied in the field of environmental chemistry and new materials, can solve the problems of low adsorption capacity of dispersed carbon dioxide, short cycle life of adsorbents, easy detachment of heating regeneration, etc., and achieve easy cycle regeneration, convenient transportation, and stable properties Effect

Inactive Publication Date: 2015-03-25
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of composite adsorbent still has cumbersome preparation process and high preparation cost; the effective amino group cannot be highly uniformly dispersed, resulting in low carbon dioxide adsorption; Easy to detach, resulting in shortcomings such as short cycle life of the adsorbent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Ethylamine (2.000g) and cucurbit[7]urea (100mg) were stirred at 50°C for 3.5h, the insoluble matter was filtered, and uncomplexed ethylamine was washed away with methanol. The white powder was vacuum-dried at 70°C for 3 hours to obtain a supramolecular complex of ethylamine and cucurbit[7]uril with a yield of 56%. The aqueous solution or solid powder of the supramolecular complex of ethylamine and cucurbit[7]uril can be used to adsorb carbon dioxide, and the dissociation of carbon dioxide can be realized by heating to 90°C. The supramolecular complex of ethylamine and cucurbit[7]uril can be Cyclic adsorption of carbon dioxide.

Embodiment 2

[0028] Propylamine (2.000g) and cucurbit[7]urea (100mg) were stirred at 50°C for 3.5h, the insoluble matter was filtered, and uncomplexed propylamine was washed away with methanol. The white powder was vacuum-dried at 70°C for 3 hours to obtain a supramolecular complex of propylamine and cucurbit[7]uril with a yield of 63%. The aqueous solution or solid powder of the supramolecular complex of propylamine and cucurbit[7]uril can be used to adsorb carbon dioxide, and the dissociation of carbon dioxide can be realized by heating to 98°C, and the supramolecular complex of propylamine and cucurbit[7]uril can be cyclically adsorbed carbon dioxide.

Embodiment 3

[0030] Butylamine (2.000g) and cucurbit[7]urea (100mg) were stirred at 50°C for 3.5h, the insoluble matter was filtered, and uncomplexed butylamine was washed away with methanol. The white powder was vacuum-dried at 70°C for 3 hours to obtain a supramolecular complex of butylamine and cucurbit[7]uril with a yield of 72%. The aqueous solution or solid powder of the supramolecular complex of butylamine and cucurbit[7] urea can be used to absorb carbon dioxide, and the dissociation of carbon dioxide can be realized by heating to 100 ° C. The supramolecular complex of butylamine and cucurbit[7] urea can be Cyclic adsorption of carbon dioxide.

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Abstract

The invention discloses a preparation method and application of a super-molecular carbon dioxide adsorbent used in solid and liquid states, and belongs to the technical fields of environmental chemistry and new materials. The method comprises the following steps: carrying out heating reaction on organic amine, a macrocyclic compound and a solvent according to a certain weight ratio; filtering insoluble substances or adding an organic solvent so as to enable sediments to be separated out; and washing solids, and drying in vacuum, so as to obtain a super-molecular complex of the organic amine and the macrocyclic compound. The super-molecular complex is used for adsorbing carbon dioxide in a solution state or a solid state; the carbon dioxide can be efficiently dissociated under the heating or acidifying condition; and the regeneration and the cyclic utilization of the adsorbent are achieved. The super-molecular carbon dioxide adsorbent disclosed by the invention is low in cost, simple in preparation flow, easy to recycle and regenerate, and long in circulating service life; the defects that the organic amine is easy to oxide and degrade, and strong in corrosivity are solved; and the super-molecular carbon dioxide adsorbent is relatively stable in property, and convenient to store and transport, can be used at high temperature, and is a carbon dioxide adsorbent with a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental chemistry and new materials, and relates to a preparation method and application of a supramolecular carbon dioxide adsorbent used in both solid and liquid states, in particular to supramolecular carbon dioxide formed by assembling organic amines and macrocyclic supramolecular compounds Adsorbent. Background technique [0002] Carbon dioxide is the main gas that causes the greenhouse effect, and its production mainly comes from the burning of coal, oil and natural gas. In recent years, carbon dioxide emissions have been increasing year by year, posing a serious threat to the current and future global ecological environment, so the development of efficient carbon dioxide adsorbents is of great significance. At present, the carbon dioxide adsorbent commonly used in industry is an adsorbent mainly composed of a solution-state organic amine. This organic amine solution can quickly react with ca...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01D2253/20B01J20/22Y02C20/40
Inventor 刘莉
Owner DALIAN UNIV OF TECH
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