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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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 therma...

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.

Application Domain

Carbon compounds

Technology Topic

IonActivated carbon +13

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Examples

Experimental program(3)
Effect test(1)

Example Embodiment

[0023] Example 1:

[0024] Put 5g of waste cotton cloth fragments with a diameter of less than 5mm into 50mL of a zinc chloride solution with a concentration of 0.3g/ml for 24 hours, then perform vacuum distillation in a rotary evaporator to obtain a carbon source material containing activator, and place it in After drying in an oven at 110°C for 24 hours, adding 20% by mass expanded graphite, mixing thoroughly to form a solid mixture, and finally sending the resulting solid mixture into an atmospheric tube furnace and burning in a nitrogen atmosphere at 400°C Activate for 0.5h, stop heating and cool to room temperature in a nitrogen atmosphere, then rinse with deionized water to neutrality, and dry it in an oven at 110°C to constant weight to obtain high thermal conductivity activated carbon, marked as AC-1.

Example Embodiment

[0025] Example 2:

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

Example Embodiment

[0027] Example 3:

[0028] Put 5g of waste cotton cloth fragments with a diameter of less than 5mm into 50mL of a zinc chloride solution with a concentration of 0.3g/ml for 48 hours, and then perform vacuum distillation in a rotary evaporator. The solid obtained is a carbon source material containing an activator. Placed in an oven at 120°C for 22 hours to dry, then add 40% by mass of expanded graphite, mix well to form a solid mixture, and finally send the resulting solid mixture into an atmospheric tube furnace at 500°C under a nitrogen atmosphere Burn and activate for 1 hour, stop heating and cool to room temperature in a nitrogen atmosphere, then rinse with deionized water to neutrality, and dry in an oven at 100°C to constant weight to obtain high thermal conductivity activated carbon, labeled AC-3.

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Classification and recommendation of technical efficacy words

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

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Example Embodiment

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Description & Claims & Application Information

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