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Production method of producing active carbon with high specific surface area by composite activator

A composite activator and production method technology, which is applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve problems such as equipment corrosion, high activation temperature, and high cost, so as to save production energy consumption and production costs, and reduce reaction temperature, corrosion reduction effect

Active Publication Date: 2014-03-19
NANJING FORESTRY UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used preparation method of activated carbon with high specific surface area is activated by strong base as an activator. The commonly used strong bases are sodium hydroxide and potassium hydroxide. Activated carbon with high specific surface area is prepared by activation with strong base. Not only the activation temperature is high, Usually above 800 °C, and the cost of the alkali used is high, the corrosion of the equipment is extremely serious, and the post-treatment is relatively difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The rice husk is washed with water to remove surface dust, dried and used as raw material. The composite activator is a mixed solution of 5mol / L zinc chloride and 0.4mol / L copper chloride. After mixing according to the mass ratio of the raw material and the composite activator at a volume ratio of 1:5, soak for 24 hours, the color of the rice husk turns brown, and remove the filtrate. Send the impregnated raw materials into a high-temperature tube furnace, the nitrogen flow rate is 200ml / min, and the heating rate is 10°C / min, the temperature is raised to 500°C activation temperature, kept at this temperature for 2 hours, and naturally cooled to room temperature to obtain Activation material. Take out the activation material, pickle with 0.1mol / L hydrochloric acid solution at 80°C for 20min, wash 3 times until the solution is colorless, wash the pickled product repeatedly with tap water until it is neutral, and place it in an oven at 105°C , and dried for 24 hours to p...

Embodiment 2

[0013] Crush the rice husk to 40 mesh, mix 30g of rice husk with 300ml of 2.5 mol / L sodium hydroxide, react at 80°C for 6 hours, wash the reacted rice husk with tap water until neutral, and obtain desiliconized rice husk. The raw material is desiliconized rice husk. The composite activator is a mixed solution of 5mol / L zinc chloride and 0.4mol / L copper chloride. After mixing according to the mass ratio of the raw material and the composite activator at a volume ratio of 1:5, soak for 24 hours, the color of the rice husk turns brown, and remove the filtrate. The impregnated raw material is sent into a high-temperature tube furnace, heated to an activation temperature of 500°C at a heating rate of 10°C / min, kept at this temperature for 2 hours, and naturally cooled to room temperature to obtain an activated material. Take out the activation material, pickle with 0.1mol / L hydrochloric acid solution at 80°C for 20min, wash 3 times until the solution is colorless, wash the pickled...

Embodiment 3

[0015] Crush the fir chips to 70 mesh. The composite activator is a mixed solution of 5mol / L zinc chloride and 0.4mol / L copper chloride. Mix 10g fir sawdust with 100ml compound activator and soak at room temperature for 24h. The fir sawdust turned brown in color and the filtrate was removed. The impregnated raw material is sent into a high-temperature tube furnace, heated to an activation temperature of 500°C at a heating rate of 10°C / min, kept at this temperature for 2 hours, and naturally cooled to room temperature to obtain an activated material. Take out the activation material, pickle with 0.1mol / L hydrochloric acid solution at 80°C for 20min, wash 3 times until the solution is colorless, wash the pickled product repeatedly with tap water until it is neutral, and place it in an oven at 105°C , and dried for 24 hours to prepare woody activated carbon with high specific surface area. Its specific surface area reaches 2262m 2 / g, the iodine adsorption value is 1304mg / g, ...

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Abstract

The invention discloses a production method of producing active carbon with a high specific surface area by a composite activator. The production method comprises the following steps: (1) preparing the composite activator; (2) mixing a biomass material with the composite activator, and impregnating; (3) activating the impregnated material in a high-temperature tubular furnace for activating for 1 hour-2.5 hours, naturally cooling to the room temperature; and (4) washing an activated product by hydrochloric acid, cleaning by tap water, placing in an oven of 105 DEG C for drying until weight is constant to obtain the active carbon with the high specific surface area. The production method disclosed by the invention has the advantages that the active carbon is prepared by adopting the composite activator of zinc chloride and copper chloride. Compared with the conventional strong-base method for preparing the active carbon with the high specific surface area, the production method disclosed by the invention lowers application cost of the activator, lowers a reaction temperature for preparing the active carbon, and lowers corrosion on a device at the same time. Besides, production energy consumption and production cost are saved.

Description

technical field [0001] The invention relates to a production method for producing high specific surface activated carbon with a composite activator, and belongs to the technical field of preparation of novel composite activators. Background technique [0002] Activated carbon with high specific surface area has developed micropores and strong adsorption capacity. It is a kind of carbon material with excellent performance. It is widely used in chemical industry, environmental protection, food and pharmaceuticals, electrode materials and other fields. The commonly used preparation method of activated carbon with high specific surface area is activated by strong base as an activator. The commonly used strong bases are sodium hydroxide and potassium hydroxide. Activated carbon with high specific surface area is prepared by activation with strong base. Not only the activation temperature is high, Usually above 800°C, and the cost of the alkali used is high, the corrosion of the e...

Claims

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Application Information

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IPC IPC(8): C01B31/12C01B32/342C01B32/348
Inventor 周建斌刘斌陈登宇李菲菲张伟张守军
Owner NANJING FORESTRY UNIV
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