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Method for preparing activated carbon with ultrahigh specific surface area from soapberry residue as raw material

A technology with ultra-high specific surface area and Sapindus chinensis, applied in the field of comprehensive utilization of resources, to achieve the effect of broad market prospects, high specific surface area and low price

Inactive Publication Date: 2014-11-12
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As a kind of energy tree species, Sapinberry has been planted on a large scale across the country. After extracting biodiesel raw material oil from Sapinberry fruit, a large amount of residue is left. Sapinberry residue is rich in carbon sources and can be used as an important source of activated carbon. The source of raw carbon, there is no report on the preparation of ultra-high specific surface area activated carbon from Sapindus sapindus fruit as raw material

Method used

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  • Method for preparing activated carbon with ultrahigh specific surface area from soapberry residue as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. The residue of Sapindus chinensis is dried in the sun, crushed, washed 8 times with aqueous solution, and then dried. Then put the washed Sapindus residue into the microwave reactor, feed N with the flow rate of 50ml / min 2 , under the action of microwave power 2000W, the temperature was raised to 600°C at a heating rate of 200°C / min, and the carbonization time was 50min to obtain carbonized products.

[0028] 2. Mix 1000g of the obtained carbide with 1000g of KOH, 100g of LiOH, and 100g of K 2 CO 3 Mix evenly, put it into the atmosphere furnace, and feed N at a flow rate of 100ml / min 2 , at a heating rate of 30°C / min to 900°C for 100min activation to obtain the primary product of activated carbon.

[0029] 3. Finally, the prepared activated carbon primary product is washed with hydrochloric acid, washed with water to neutrality, and dried to obtain a powdered activated carbon final product. It has been determined that the BET specific surface area of ​​the prepar...

Embodiment 2

[0032] 1. Dry the residue of Sapindus chinensis in the sun, crush it, wash it with 30% ethanol solution for 5 times, and then dry it. Then put the processed Sapindus residue into the microwave reactor, feed N with the flow rate of 200ml / min 2 , under the microwave power of 1500W, the temperature was raised to 500°C at a heating rate of 80°C / min and the carbonization time was 100min to obtain a carbonized product.

[0033]2. Mix 1000g of the obtained carbonized product with 3000g of NaOH and 1000g of LiOH evenly, put it into the atmosphere furnace, and feed N at a flow rate of 90ml / min 2 , at a heating rate of 10°C / min to 850°C for 200min activation to obtain the primary product of activated carbon.

[0034] 3. Finally, the prepared activated carbon primary product is washed with hydrochloric acid, washed with water to neutrality, and dried to obtain a powdered activated carbon final product. It has been determined that the prepared activated carbon has the following properti...

Embodiment 3

[0037] 1. Dry the residue of Sapindus chinensis in the sun, crush it, wash it with 50% methanol solution for 3 times, and then dry it. Then put the processed Sapindus residue into the microwave reactor, feed N with the flow rate of 350ml / min 2 , under the microwave power of 1000W, the temperature was raised to 350°C at a heating rate of 150°C / min and the carbonization time was 110min to obtain a carbonized product.

[0038] 2. Mix 1000g of the obtained carbonized product with 5000g of LiOH evenly, put it into the atmosphere furnace, and feed N at a flow rate of 120ml / min 2 , at a heating rate of 40°C / min, the temperature was raised to 1000°C for 60 minutes to activate the activated carbon primary product;

[0039] 3. Finally, the prepared activated carbon primary product is washed with hydrochloric acid, washed with water to neutrality, and dried to obtain a powdered activated carbon finished product. The prepared activated carbon has the following properties: BET specific s...

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Abstract

The invention discloses a method for preparing activated carbon with an ultrahigh specific surface area from soapberry residues as a raw material. The method specifically comprises the following steps: (1) drying carbon-containing residues such as soapberry fruits, shells and peels in the sun, crushing, washing for 1-8 times with water or alcohol solution, and drying for later use; (2) putting the raw materials treated in the step (1) into a microwave reactor for carbonization in microwaves; (3) uniformly mixing the carbide obtained in the step (2) with a composite activating agent, putting into an atmosphere furnace, heating to activate, and cooling to be the room temperature, thereby obtaining a primary activated carbon product; (4) washing the prepared primary product to be neutral, and drying, thereby obtaining a finished product, that is, powder activated carbon. The activated carbon prepared by using the method is high in specific surface area, rich in mesopores, reasonable in pore structure distribution, moderate in apparent density, uniform in grain density, stable in property and very high in adsorption capability, the BET specific surface area is greater than 2500m<2> / g, and the total pore volume is 0.50-2.00cm<3> / g.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of resources, and in particular relates to a method for preparing activated carbon with ultra-high specific surface area by using sapindus sapindus residue as a raw material. Background technique [0002] As a porous adsorption material, activated carbon has rich pore structure, high specific surface area, excellent adsorption performance and stable chemical properties, and is widely used in chemical, medical, military, environmental protection and other fields. However, with the continuous development of medicine, environmental protection, military and other fields, ordinary activated carbon (specific surface area 500 ~ 1500m 2 / g) Due to poor selective adsorption, low specific surface area, and limited adsorption capacity, it can no longer meet the special requirements of these fields, which makes the demand for activated carbon with high specific surface area continue to rise. The spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12
Inventor 陈登龙王勇刘金玲黄秀萍伍毓强
Owner FUJIAN NORMAL UNIV
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