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Modifying method capable of increasing methylbenzene adsorption quantity of carbon sphere-activated carbon composites

A composite material, activated carbon technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of affecting adsorption performance, reduction, etc., and achieve the effect of increasing the amount of toluene adsorption

Inactive Publication Date: 2017-05-31
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the loading of carbon spheres has a serious impact on the pore structure and specific surface area of ​​activated carbon, causing it to decrease sharply, which in turn affects its adsorption performance.

Method used

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  • Modifying method capable of increasing methylbenzene adsorption quantity of carbon sphere-activated carbon composites
  • Modifying method capable of increasing methylbenzene adsorption quantity of carbon sphere-activated carbon composites

Examples

Experimental program
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Effect test

example 1

[0022] Accurately weigh 1.0 g of pretreated woody granular activated carbon, add it to 50 mL of glucose solution with a concentration of 1.0 mol / L, ultrasonicate at 25 °C for 1 h, and then shake in a water bath at 25 °C for 24 h. Pour the activated carbon-glucose mixture into a 250mL autoclave and react at 160°C for 2.5h. After cooling to room temperature, wash with alcohol, wash with water until neutral and dry. The toluene adsorption capacity of the carbon sphere-activated carbon composite material is 39.19mg / g.

Embodiment 2

[0024] Accurately weigh 1.0 g of pretreated woody granular activated carbon, add it to 50 mL of glucose solution with a concentration of 0.5 mol / L, ultrasonicate at 25 °C for 1 h, and then shake in a water bath at 25 °C for 12 h. Pour the activated carbon-glucose mixture into a 250mL autoclave and react at 160°C for 2.5h. After cooling to room temperature, wash with alcohol, wash with water until neutral and dry. Weigh a certain amount of dried samples, add nitric acid according to the mass ratio of activated carbon to nitric acid of 1:4, and ultrasonicate at 30 °C for 1 h. Then wash with water until neutral and dry. The toluene adsorption capacity of carbon spheres-activated carbon composites increased from 39.19mg / g to 105.60mg / g.

Embodiment 3

[0026] Accurately weigh 1.0 g of pretreated woody granular activated carbon, add it to 50 mL of glucose solution with a concentration of 1.0 mol / L, ultrasonicate at 25 °C for 1 h, and then shake in a water bath at 25 °C for 24 h. Pour the activated carbon-glucose mixture into a 250mL autoclave and react at 160°C for 2.5h. After cooling to room temperature, wash with alcohol, wash with water until neutral and dry. Weigh a certain amount of dried samples, add nitric acid according to the mass ratio of activated carbon to nitric acid of 1:4, and ultrasonicate at 30 °C for 1 h. Then wash with water until neutral and dry. The toluene adsorption capacity of carbon spheres-activated carbon composites increased from 39.19mg / g to 120.85mg / g.

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Abstract

The invention discloses a modifying method capable of increasing the methylbenzene adsorption quantity of carbon sphere-activated carbon composites. The modifying method includes preparing to obtain the carbon sphere-activated carbon composites through a hydrothermal method, wherein a glucose solution serves as a hydrothermal reaction medium; weighing a specific quantity of dried carbon sphere-activated carbon composites, mixing the dried carbon sphere-activated carbon composites with nitric acid according to a specific mass ratio, adding the mixture into a conical flask with a cover and performing ultrasonic technical treatment. The modifying method is green and efficient in modifying technology and enables the methylbenzene adsorption quantity of the carbon sphere-activated carbon composites to be increased from 39.19 mg / g to 143.15 mg / g, the surface hydroxyl group content thereof to be increased from 27.18% to 30.85% and the carboxyl group content thereof to be increased from 9.23% to 10.7%.

Description

technical field [0001] The invention belongs to the technical field of application of carbonaceous materials, and mainly relates to a modification method for increasing the toluene adsorption capacity of a carbon ball-activated carbon composite material. Background technique [0002] Activated carbon is an excellent adsorption material with stable physical and chemical properties, excellent adsorption performance and good thermal stability, etc., and is widely used in many fields such as environmental protection, medicine, and food. The adsorption performance of activated carbon is related to its rich pore structure, huge specific surface area and surface chemical functional groups. The specific surface area and pore structure distribution of activated carbon are the main factors affecting its physical adsorption, while the type and quantity of surface chemical functional groups are the main factors affecting its chemical adsorption. Studies have shown that by adjusting the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30
CPCB01J20/20B01J20/22B01J2220/4806B01J2220/4812
Inventor 卢辛成蒋剑春孙康张艳萍戴伟娣
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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