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Method for preparing high thermal conductivity active carbon taking waste cotton cloth as raw material

A high thermal conductivity, activated carbon technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of poor thermal conductivity, low energy utilization, and low thermal conductivity of activated carbon, and achieve economical preparation and regeneration technology, The preparation process is easy to realize and the effect of improving thermal conductivity

Inactive Publication Date: 2013-07-24
ZHONGSHAN FLASHLIGHT POLYTECHNIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of desorption regeneration, the poor thermal conductivity of activated carbon makes traditional activated carbon have problems such as low thermal conductivity, slow heat transfer speed, and low energy utilization rate in the large-scale thermal regeneration process, and there are also major safety hazards.

Method used

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  • Method for preparing high thermal conductivity active carbon taking waste cotton cloth as raw material
  • Method for preparing high thermal conductivity active carbon taking waste cotton cloth as raw material
  • Method for preparing high thermal conductivity active carbon taking waste cotton cloth as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put 5g of waste cotton cloth fragments with a diameter less than 5mm into 50mL of zinc chloride solution with a concentration of 0.3g / ml and soak for 24 hours, then carry out vacuum distillation in a rotary evaporator to obtain a carbon source material containing an activator, which is placed in After drying in an oven at 110°C for 24 hours, add expanded graphite with a mass percentage of 20%, mix thoroughly to form a solid mixture, and finally send the resulting solid mixture into an atmosphere tube furnace and burn it under a nitrogen atmosphere at 400°C After activating for 0.5h, stop heating and cool to room temperature in a nitrogen atmosphere, rinse with deionized water until neutral, and dry in an oven at 110°C to constant weight to obtain activated carbon with high thermal conductivity, marked as AC-1.

Embodiment 2

[0026] 5g of waste cotton cloth fragments with a diameter less than 5mm are put into 50mL of zinc chloride solution with a concentration of 0.3g / ml and soaked for 36 hours, and then carry out vacuum distillation in a rotary evaporator. The resulting solid is the carbon source material containing the activator. Dry in an oven at 100°C for 26 hours, add expanded graphite with a mass percentage of 5%, and mix well to form a solid mixture, and finally send the resulting solid mixture into an atmosphere tube furnace under a nitrogen atmosphere at 300°C Ignite and activate for 2 hours, stop heating and cool to room temperature in a nitrogen atmosphere, rinse with deionized water until neutral, and dry in an oven at 120°C to constant weight to obtain high thermal conductivity activated carbon, marked as AC-2.

Embodiment 3

[0028] 5g of waste cotton cloth fragments with a diameter less than 5mm were put into 50mL concentration and soaked in a zinc chloride solution of 0.3g / ml for 48 hours, and then carried out vacuum distillation in a rotary evaporator to obtain a solid that contained an activator. Dry in an oven at 120°C for 22 hours, add expanded graphite with a mass percentage of 40%, and mix well to form a solid mixture, and finally send the obtained solid mixture into an atmosphere tube furnace under a nitrogen atmosphere at 500°C Ignite and activate for 1 hour, stop heating and cool to room temperature in a nitrogen atmosphere, rinse with deionized water until neutral, and dry in an oven at 100°C to constant weight to obtain high thermal conductivity activated carbon, marked as AC-3.

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Abstract

The invention discloses a method for preparing high thermal conductivity active carbon taking waste cotton cloth as a raw material. The method comprises the following steps: placing waste cotton pieces into a zinc chloride solution to soak, distilling under reduced pressure, then drying, adding 5-40 wt% of expanded graphite, mixing fully, firing and activating in the presence of nitrogen at 300-500 DEG C for 0.5-2 h, stopping heating, cooling to room temperature in the presence of nitrogen, washing with deionized water to neutral, and drying. In the present invention, waste cotton cloth is used as the raw material for the production of activated carbon, thereby achieving to control pollution with waste and expand production raw material sources of activated carbon. The activated carbon prepared by the invention is high in thermal conductivity, can be efficiently recycled, can keep good adsorption properties after multiple regenerations, and helps to expand industrial application field and scope of activated carbon.

Description

【Technical field】 [0001] The invention relates to a method for preparing activated carbon with high thermal conductivity, in particular to a method for preparing activated carbon with high thermal conductivity by using waste cotton cloth as a raw material, and belongs to the technical field of activated carbon preparation. 【Background technique】 [0002] Activated carbon is a solid porous material with porous structure, large specific surface area, low preparation cost, and mature and simple preparation process. It is widely used in the fields of adsorption, catalysis, reagent recovery, separation, and refining. Adsorbent material. At present, the preparation of activated carbon mostly uses wood, coal, etc. as raw materials, but the non-renewable or expensive nature of these raw materials limits its application to a certain extent. Scholars at home and abroad have discussed using waste medium fiberboard, plants, bamboo chips, etc. as alternative raw materials to produce act...

Claims

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Application Information

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IPC IPC(8): C01B31/12C01B32/324C01B32/342
Inventor 谷雪贤
Owner ZHONGSHAN FLASHLIGHT POLYTECHNIC
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