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Microporous granular carbon and its preparation method

A technology of microporous particles and carbonization, applied in separation methods, chemical instruments and methods, carbon preparation/purification, etc., can solve the problems of unpublished microsphere pore structure information, failure to observe microporous structure, etc., and achieve convenience Spherical shape and size, simple and easy-to-control preparation process, and wide application range

Active Publication Date: 2021-11-09
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN201811240572.1 discloses a preparation method of chitosan microspheres with high specific surface area, the specific surface area of ​​the microspheres is adjusted by the content of alcohol in the curing bath, but the invention does not disclose the pore structure information of the microspheres, and through scanning The microporous structure could not be observed in the electron microscope image

Method used

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  • Microporous granular carbon and its preparation method
  • Microporous granular carbon and its preparation method
  • Microporous granular carbon and its preparation method

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preparation example Construction

[0046] B. Preparation of monodisperse particles: Inject the internal phase solution and the external phase solution into the injection tube and collection tube of the capillary microfluidic chip to form a monodisperse water / oil emulsion, and inject the monodisperse emulsion into the curing bath to interact with the crosslinking agent. Cross-linking reaction to obtain particles;

[0047] C. Cleaning, freeze-drying, and carbonization of the formed particles: separate the particles from the solidification bath, and wash them with the above-mentioned corresponding organic solvents, petroleum ether, and deionized water to remove the excess oil phase on the surface of the particles and inside the pores, and place them after drying. Carbonize in a tube furnace, heat up to a carbonization temperature of 600-900°C for carbonization to obtain microporous granular carbon, then cool down naturally, and store in a dry box.

[0048] In the method of the present invention, since chitosan is ...

Embodiment 1

[0057] Mix 2% chitosan solution containing 2% oil-in-water emulsifier F127 with n-octane evenly, and the volume ratio of n-octane is 10%. Place it under a homogeneous emulsifier and emulsify at 13000rpm for 60s to obtain an internal phase solution. Add 6% water-in-oil emulsifier Span80 into n-octane and mix evenly to obtain the external phase solution. The curing bath is 2% cross-linking agent glutaraldehyde added to the external phase solution.

[0058] The inner phase fluid and the outer phase fluid were respectively injected into the injection tube and the collection tube of the capillary microfluidic device to form a monodisperse water / oil emulsion. The diameter of the cone tip of the injection port was 180 μm, and the diameter of the receiving tube was 550 μm. The monodisperse emulsion is injected into the solidification bath to generate crosslinking reaction with glutaraldehyde; the flow rate of the internal phase solution is 1mL / h, the flow rate of the external phase s...

Embodiment 2

[0061] Mix 2% chitosan solution containing 2% oil-in-water emulsifier F127 with n-octane evenly, and the volume ratio of n-octane is 5%. Place it under a homogeneous emulsifier and emulsify at 16000rpm for 60s to obtain an internal phase solution. Add 6% water-in-oil emulsifier Span 80 into n-octane and mix evenly to obtain the external phase solution. The curing bath is 2% cross-linking agent glutaraldehyde added to the external phase solution.

[0062] The inner phase fluid and the outer phase fluid were respectively injected into the injection tube and the collection tube of the capillary microfluidic device to form a monodisperse water / oil emulsion. The diameter of the cone tip of the injection port was 180 μm, and the diameter of the receiving tube was 550 μm. The monodisperse emulsion is injected into the solidification bath to generate crosslinking reaction with glutaraldehyde; the flow rate of the internal phase solution is 2mL / h, the flow rate of the external phase s...

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Abstract

The invention belongs to the field of environmental protection materials, in particular to a microporous granular carbon and a preparation method thereof. The technical problem to be solved by the present invention is to provide a microporous granular carbon and a preparation method thereof, comprising the following steps: A. Emulsifying a chitosan solution or a polyvinyl alcohol solution, an oil-in-water emulsifier and an organic solvent to obtain an internal phase solution ; Mix the water-in-oil emulsifier and the organic solvent to obtain an external phase solution; Mix the cross-linking agent and the external phase solution to obtain a curing bath; B. Inject the internal phase solution and the external phase solution into the injection tube and the collection tube of the capillary microfluidic chip respectively A monodisperse water-oil emulsion is formed in the middle, and the monodisperse water-oil emulsion is injected into a curing bath to undergo a cross-linking reaction with a cross-linking agent to obtain particles; C. The particles are washed, dried and carbonized to obtain microporous granular carbon. The method of the invention can obtain the microporous granular carbon, and the method is simple, easy to operate, and pollution-free.

Description

technical field [0001] The invention belongs to the field of environmental protection materials, and in particular relates to a microporous granular carbon and a preparation method thereof. Background technique [0002] Over the past few decades, excess greenhouse gases in the atmosphere have led to significant global climate change. According to the government's Panel on Climate Change (IPCC), fumes from industry account for the global CO2 produced by fuels. 2 36% of emissions. Among the various CO2 removal technologies, post-combustion capture is the most applicable to the power industry. CO 2 Post-combustion capture technologies include adsorption, membrane separation, and absorption. Among them, the adsorption method is the most widely used due to its simple operation and regeneration process and low cost. Among many adsorbents, porous carbon is usually 2 The heat of adsorption is lower than 25kJ / mol, which can realize super energy saving in multiple adsorption-des...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C01B32/05B01D53/02
CPCB01D53/02B01D2253/102B01D2257/504B01J20/0259B01J20/20B01J20/28021B01J20/28061B01J20/28064B01J20/28071B01J20/2808B01J2220/4812B01J2220/4825C01B32/05Y02P20/151Y02C20/40
Inventor 靳紫恒江霞谢玲玲常玉龙
Owner SICHUAN UNIV
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