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Nitrogen-doped porous hollow carbon sphere carbon dioxide adsorption material as well as preparation method and application thereof

A hollow carbon sphere, adsorption material technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problem of difficult introduction of nitrogen and low introduction amount, low material recycling rate, adsorption capacity low problems, to achieve the effect of large adsorption capacity, controllable morphology, and high adsorption performance

Active Publication Date: 2017-06-20
SHAANXI YUTENG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] But when adopting above-mentioned raw material, nitrogen is difficult to introduce and the amount of introduction is low; And CO 2 The adsorption capacity is low, although the modification of porous carbon materials by amino groups can improve the CO 2 High adsorption capacity, but low recycling rate of modified materials

Method used

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  • Nitrogen-doped porous hollow carbon sphere carbon dioxide adsorption material as well as preparation method and application thereof
  • Nitrogen-doped porous hollow carbon sphere carbon dioxide adsorption material as well as preparation method and application thereof
  • Nitrogen-doped porous hollow carbon sphere carbon dioxide adsorption material as well as preparation method and application thereof

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Effect test

Embodiment 1

[0037] Preparation of SiO by the above stober method and solvothermal method 2 Ball flower:

[0038] Preparation of aqueous solution A: Add cetylpyridinium bromide (CPB) and urea (mass ratio 5:3) to an appropriate amount of deionized water, and vigorously stir at 500-700rmp at room temperature to make cetylpyridinium bromide (CPB) and urea are more evenly dispersed. Among them, the ratio of urea to water is 0.6g:30mL.

[0039] Prepare oil solution B: measure tetraethyl orthosilicate (TEOS), cyclohexane and n-pentanol (the volume ratio of tetraethyl orthosilicate, cyclohexane and n-pentanol is 9:100:5) to obtain oil solution B , add the oil solution B dropwise to the aqueous solution A under stirring at room temperature, and stir well at room temperature to obtain a microemulsion, and transfer the obtained microemulsion into a stainless steel high-pressure reactor with a polytetrafluoroethylene liner, at 120 ° C Solvent thermal crystallization for 20 hours, cooled to room te...

Embodiment 2

[0053] Preparation of SiO by the above stober method and solvothermal method 2 Ball flower:

[0054] Preparation of aqueous solution A: Add cetylpyridinium bromide (CPB) and urea (mass ratio: 5:3) to an appropriate amount of deionized water, and vigorously stir at 500rmp at room temperature to make cetylpyridinium bromide (CPB) ) and urea are dispersed more uniformly to obtain solution A. Among them, the ratio of urea to water is 0.6g:30mL.

[0055] Prepare oil solution B: measure tetraethyl orthosilicate (TEOS), cyclohexane and n-pentanol (the volume ratio of tetraethyl orthosilicate, cyclohexane and n-pentanol is 9:100:5) to obtain oil solution B , add the oil solution B dropwise to the aqueous solution A under stirring at room temperature, and stir well at room temperature to obtain a microemulsion, and transfer the obtained microemulsion into a stainless steel high-pressure reactor with a polytetrafluoroethylene liner, at 120 ° C Solvent thermal crystallization for 20 h...

Embodiment 3

[0059] Preparation of SiO by the above stober method and solvothermal method 2 Ball flower:

[0060] Preparation of aqueous solution A: Add cetylpyridinium bromide (CPB) and urea (mass ratio: 5:3) to an appropriate amount of deionized water, and vigorously stir at 700rmp at room temperature to make cetylpyridinium bromide (CPB) ) and urea are dispersed more uniformly to obtain solution A. Among them, the ratio of urea to water is 0.6g:30mL.

[0061] Prepare oil solution B: measure tetraethyl orthosilicate (TEOS), cyclohexane and n-pentanol (the volume ratio of tetraethyl orthosilicate, cyclohexane and n-pentanol is 9:100:5) to obtain oil solution B , add the oil solution B dropwise to the aqueous solution A under stirring at room temperature, and stir well at room temperature to obtain a microemulsion, and transfer the obtained microemulsion into a stainless steel high-pressure reactor with a polytetrafluoroethylene liner, at 120 ° C Solvent thermal crystallization for 20 h...

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Abstract

The invention relates to a nitrogen-doped porous hollow carbon sphere carbon dioxide adsorption material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding SiO2 sphere flowers into mixed liquid of deionized water, absolute ethyl alcohol and ammonia water, and carrying out ultrasonic oscillation until the SiO2 sphere flowers are completely dispersed; and then adding a dopamine hydrochloride water solution, uniformly stirring at the room temperature, filtering, washing, drying, and processing at 700-900 DEG C for 2-4 hours in a N2 atmosphere so as to obtain nano-composite spheres; and finally impregnating the nano-composite spheres in hydrofluoric acid to remove the SiO2 sphere flowers, filtering, washing, and drying, so as to obtain the nitrogen-doped porous hollow carbon sphere CO2 adsorption material. The adsorption material is a porous hollow carbon sphere, the particle sizes of porous hollow nano-carbon spheres are about 400nm, the porous hollow nano-carbon spheres are uniform and regular, and the adsorption material has high nitrogen content, adsorptive property, specific surface area and pore volume and high-dispersed regular appearance, the surface of the adsorption material contains rich amino active sites, and the adsorption material can be applied to efficient adsorption of industrial CO2.

Description

technical field [0001] The present invention relates to a CO 2 The invention relates to an adsorption material, in particular to a nitrogen-doped porous hollow carbon sphere carbon dioxide attachment material and a preparation method and application thereof. Background technique [0002] As industry booms, global atmospheric CO 2 Concentrations increased year by year, CO 2 It is the main component of the greenhouse effect. The greenhouse effect has led to a series of environmental problems such as global warming, melting glaciers, rising sea levels, and pests and diseases. CO 2 The environmental problems caused by the elevated concentration of CO have been widely concerned by researchers around the world. 2 Capture and storage technology (CCS) is one of the effective ways to reduce it. [0003] Porous carbon-based materials include carbon nanotubes, carbon molecular sieves, ordered mesoporous carbon, etc. Ordered mesoporous carbon is a porous carbon material with a por...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30
CPCB01J20/00B01J20/103B01J20/20B01J20/28021
Inventor 何炽陈长伟郑春莉潘华于艳科刘红霞
Owner SHAANXI YUTENG IND
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