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Method for preparing high specific surface area active carbon by using carya cathayensis peels

A technology of hickory shell and high specific surface area, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as ecological environment pollution of hickory shell, and achieve cost saving and good economic benefits. and social benefits

Inactive Publication Date: 2013-03-06
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of serious pollution of the ecological environment caused by the outer shell of the hickory nut, and to provide a method for preparing activated carbon with a high specific surface area by using the shell of the pecan

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] The present invention relates to a method for preparing activated carbon with high specific surface area by using hickory husks. The method includes the following steps:

[0024] 1) Naturally air-dry the hickory cattail husks, pulverize in a grinder, and pass the powder to 100 mesh.

[0025] 2) Put step 1) pecan cattail shell powder in N 2 Under carbonization, the carbonization temperature is 500°C, and the carbonization time is 0.5 hours.

[0026] 3) Mix the carbonized material in step 2) with potassium hydroxide, and then mix it in N 2 Under activation, the weight ratio of carbonized material to potassium hydroxide is 1:2, the activation temperature is 800°C, and the activation time is 0.5 hours.

[0027] 4) After the product obtained in step 3) is cooled, it is washed with dilute hydrochloric acid, and then washed with distilled water until the pH of the washing liquid is 6-7, and dried at 100° C. to obtain a high specific surface area activated carbon product.

[0028] The sp...

Embodiment 2

[0030] The present invention relates to a method for preparing activated carbon with high specific surface area by using hickory husks. The method includes the following steps:

[0031] 1) The hickory cattail shells are naturally air-dried and crushed in a pulverizer. The powder passes 200 mesh.

[0032] 2) Put step 1) pecan cattail shell powder in N 2 Under carbonization, the carbonization temperature is 700°C, and the carbonization time is 1.5 hours.

[0033] 3) Mix the carbonized material in step 2) with potassium hydroxide, and then mix it in N 2 Under activation, the weight ratio of carbonized material to potassium hydroxide is 1:3, the activation temperature is 900°C, and the activation time is 1 hour.

[0034] 4) After the product obtained in step 3) is cooled, it is washed with dilute hydrochloric acid, and then washed with distilled water until the pH of the washing liquid is 6-7, and dried at 100° C. to obtain a high specific surface area activated carbon product.

[0035] The...

Embodiment 3

[0037] The present invention relates to a method for preparing activated carbon with high specific surface area by using hickory husks. The method includes the following steps:

[0038] 1) Naturally air-dry the hickory husks and pulverize them in a grinder to pass 400 meshes.

[0039] 2) Put step 1) pecan cattail shell powder in N 2 Under carbonization, the carbonization temperature is 600°C, and the carbonization time is 1 hour.

[0040] 3) Mix the carbonized material in step 2) with potassium hydroxide, and then mix it in N 2 Under activation, the weight ratio of carbonized material to potassium hydroxide is 1:4, the activation temperature is 900°C, and the activation time is 1 hour.

[0041] 4) After the product obtained in step 3) is cooled, it is washed with dilute hydrochloric acid, and then washed with distilled water until the pH of the washing liquid is 6-7, and dried at 100° C. to obtain a high specific surface area activated carbon product.

[0042] The specific surface area ...

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Abstract

The present invention relates to a method for preparing high specific surface area active carbon by using carya cathayensis peels. According to the present invention, agricultural solid waste is treated while resource is achieved, waste is changed into treasure, and problems of arbitrary accumulation of a large amount of carya cathayensis peels and serious environmental pollution are solved; the preparation method comprises the following specific steps: crushing discarding carya cathayensis peels by using a crusher to achieve a certain particle size, carrying out carbonization for 0.5-2 h at a temperature of 500-800 DEG C, mixing the carbonized material and potassium hydroxide according to a weight ratio of 1:2-1:6, carrying out activation for 0.5-2 h at a temperature of 800-1000 DEG C, washing by using dilute hydrochloric acid after the activated material is cooled, washing by using distilled water to achieve the pH value of the washing liquid of 6-7, and drying at a temperature of 100 DEG C to obtain the high specific surface area active carbon product, wherein the specific surface area is 2500-3100 m<2> / g.

Description

Technical field [0001] The invention relates to a method for preparing activated carbon with high specific surface area by using hickory cattail shells, and belongs to the field of material preparation. Background technique [0002] Pecans are relatively small in the country, mainly in the mountainous areas of northwest Zhejiang and southeastern Anhui, 90% of which are distributed in Lin'an City, Zhejiang Province. According to preliminary statistics, the annual output of pecans in Lin'an is about 15,000-30,000 tons, and the resulting pecan shells are about 45,000-90,000 tons. The hickory shell contains an alkaloid, which is highly alkaline and not perishable. The hickory shells discarded after the hickory is picked every year cause serious pollution to the local ecological environment. At present, neither the mountain stacking nor the centralized dedicated site stacking can solve the increasing solid waste treatment of hickory outer shells. Every year, Lin'an has invested a lot...

Claims

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Application Information

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IPC IPC(8): C01B31/12C01B32/348
Inventor 徐靖才金顶峰彭晓领洪波金红晓王新庆葛洪良
Owner CHINA JILIANG UNIV
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