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 a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0010] Example 1

[0011] The rice husk is washed with water to remove dust on the surface and dried as a 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 volume ratio of the raw material quality and the composite activator at 1:5, soaking for 24h, the color of the rice husk changes to brown, and the filtrate is removed. Feed the immersed raw materials into a high-temperature tube furnace with a nitrogen flow rate of 200ml / min and a heating rate of 10°C / min to raise the temperature to 500°C activation temperature, keep it at this temperature for 2 hours, and naturally cool to room temperature. Activated material. Take out the activated material and pickle it with 0.1mol / L hydrochloric acid solution at 80℃ for 20min, and wash 3 times until the solution is colorless. Wash the product after pickling with tap water repeatedly until it is neutral, and put it in an oven at 105℃ , Dried for 2...

Example Embodiment

[0012] Example 2

[0013] The rice husk was crushed to 40 meshes, 30 g of rice husk was mixed with 300 ml of 2.5 mol / L sodium hydroxide, and reacted at 80° C. for 6 hours. The reacted rice husk was washed with tap water to neutrality to prepare desiliconized rice husk. Use desiliconized rice husk as raw material. The composite activator is a mixed solution of 5mol / L zinc chloride and 0.4mol / L copper chloride. After mixing the raw material mass and the volume ratio of the composite activator at 1:5, immersing for 24 hours, the color of the rice husk changes to brown, and the filtrate is removed. The immersed raw materials are fed 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 activation material. Take out the activated material, pickle it with 0.1mol / L hydrochloric acid solution at 80℃ for 20min, wash 3 times, until the so...

Example Embodiment

[0014] Example 3

[0015] Crush the wood shavings to 70 mesh. The composite activator is a mixed solution of 5mol / L zinc chloride and 0.4mol / L copper chloride. 10g fir shavings are mixed with 100ml composite activator and immersed for 24h at room temperature. The color of cedar shavings changed to brown, and the filtrate was removed. The immersed raw materials are fed 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 activation material. Take out the activated material and pickle it with 0.1mol / L hydrochloric acid solution at 80℃ for 20min, and wash 3 times until the solution is colorless. Wash the product after pickling with tap water repeatedly until it is neutral, and put it in an oven at 105℃ , Dry for 24h to obtain wood activated carbon with high specific surface area. Its specific surface area reaches 2262m 2 / g, iod...

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PUM

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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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