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Adsorbing agent based on carbon nanomaterial and preparation and application method thereof

A technology of carbon nanomaterials and adsorbents, which is applied in the field of adsorbents based on carbon nanomaterials, can solve the problems of increasing the number of adsorption and desorption equipment, consuming large steam or gas when heating up, and increasing the difficulty of engineering operations, so as to save raw material costs , The effect of reducing the cost of fluid transportation and shortening the desorption time

Active Publication Date: 2017-05-31
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the adsorbent is different. When desorbing the adsorbate, it needs to heat up and consume a large amount of steam or gas, and it takes a very long time.
At present, the contradiction between fast adsorption and slow desorption has not been well resolved.
This leads to an increase in the number of adsorption and desorption equipment for future scale-up operations, which not only increases the cost, but also increases the difficulty of engineering operations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Blend graphene, pore-forming agent (ferric chloride) and binder (silica sol) in a mass ratio of 1:1:1, and add to solvent (acetone) (the mass ratio of solvent to solid mixture is 1 : In 1), mix at 20° C. for 8 hours. The resulting mixture was fed into a molding machine to obtain a strip-shaped product with a diameter of 1 mm and a length of 10 mm. The stick product was dried at 100°C for 24 hours. The pore-forming agent (ferric chloride) was dissolved and removed with water, filtered, washed with deionized water until neutral, and dried at 100° C. for 20 hours to obtain the final product (the mass fraction of carbon nanomaterials was 50%. The specific surface area of ​​the adsorbent is 2000m 2 / g, the pore volume ratio of micropores, mesopores and macropores is 2:5:20).

[0032] The adsorbent product is loaded into the equipment, and the upper and lower ends of the hole cover are fixed, so that the height change rate of the adsorbent bed volume during the adsorption ...

Embodiment 2

[0034] Mix carbon nanotubes, pore forming agent (ammonium carbonate and sodium nitrate, 50% by weight each) and adhesive (aluminum sol) in a mass ratio of 10:1:4, and add to solvent (ethanol) (solvent The mass ratio to the solid mixture is 5:1), and mixed at 40° C. for 3 hours. The resulting mixture was fed into a molding machine to obtain a sheet-like product with a diameter of 10 mm and a thickness of 5 mm. Dry the flake product at 100°C for 12 hours, dissolve and remove the pore-forming agent (ammonium carbonate and sodium nitrate) in water, filter, wash with deionized water until neutral, and dry at 80°C for 4 hours to obtain The final product (the mass fraction of carbon nanomaterials is 70%. The specific surface area of ​​the adsorbent is 100m2 / g, and the pore volume ratio of micropores, mesopores and macropores is 1:5:20).

[0035] The adsorbent product is loaded into the equipment, and the upper and lower ends of the hole cover are fixed, so that the height change rat...

Embodiment 3

[0037] Carbon nanotubes and graphene (50% by mass each), pore forming agent (calcium carbonate) and binder (PVDF) were mixed at 240° C. for 6 hours at a mass ratio of 10:4:1. The resulting mixture was fed into a molding machine to obtain a tubular product with a length of 8 mm, an inner diameter of 2 mm and an outer diameter of 5 mm. The tubular product was dried at 70°C for 24 hours. The pore-forming agent (calcium carbonate) wherein is removed with hydrochloric acid, after filtering, wash to neutrality with deionized water, after drying 1 hour at 120 ℃, obtain final product (massfraction of carbon nanomaterial is 90%. Adsorbent The specific surface area is 1200m2 / g, the pore volume ratio of micropores, mesopores and macropores is 2:1:10).

[0038] The adsorbent product is loaded into the equipment, and the upper and lower ends of the hole cover are fixed, so that the height change rate of the adsorbent bed volume during the adsorption and desorption operation is less than ...

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Abstract

The invention discloses an adsorbing agent based on a carbon nanomaterial. The adsorbing agent is prepared from the carbon nanomaterial and an adhesive, wherein the mass fraction of the carbon nanomaterial ranges from 30 to 95 percent. The specific surface area of the adsorbing agent is 100 to 2000m<2> / g, and the pore volume proportion of micropores, mesopores to macropores is (1 to 2) to (1 to 5) to (1 to 20). The invention also discloses a method for preparing the adsorbing agent by adding a pore-forming agent. The adsorbing agent has the advantages of long service life, big treatment capacity, low preparation cost and the like, and is suitable for adsorbing non-polar organic compounds in a fluid.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterials, in particular to an adsorbent based on carbon nanomaterials and its preparation and use methods. Background technique [0002] Carbon nanomaterial is a new type of material with large specific surface area, good chemical stability and non-polar surface. Its representative products include carbon nanotubes and graphene. The above characteristics make carbon nanomaterials can adsorb non-polar organic substances in gases or liquids. For example, materials such as carbon nanotubes and graphene can absorb organic matter 10-100 times their own weight, thus showing better performance than traditional activated carbon materials. In addition, in the non-polar organic matter in the adsorption water, graphene sponge and carbon nanotube sponge can absorb gasoline, diesel oil or phenol in water. For carbon nanotube and graphene powder, it is reported that the method of granulation molding is use...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D15/00
CPCB01D15/00B01J20/20B01J20/28083B01J20/28085
Inventor 骞伟中陈航田佳瑞多尼杨周飞
Owner TSINGHUA UNIV
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