KR-102963620-B1 - ACTIVATED CARBON AND METHOD FOR MANUFACTURING THE SAME

Abstract

The present invention relates to activated carbon and a method for manufacturing the same.

Inventors

• 김병주
• 정훈승

Assignees

• 전주대학교 산학협력단

Dates

Publication Date

20260512

Application Date

20240118

Claims (8)

1. A step of crosslinking chitin using glutaraldehyde; A step of carbonizing the above-mentioned cross-linked chitin to produce a carbonized product; and The method includes the step of activating the above carbon material to produce activated carbon, A method for manufacturing activated carbon, wherein the content of the chitin is 2g to 25g per 1 mole of the glutaraldehyde.
2. In Article 1, The step of cross-linking the chitin above Step of preparing an aqueous glutaraldehyde solution (S110); A step of preparing a chitin solution by impregnating chitin into a prepared aqueous glutaraldehyde solution (S120); and A method for manufacturing activated carbon comprising the step (S130) of heating a manufactured chitin solution to crosslink the chitin.
3. In Article 1, A method for manufacturing activated carbon in which the above carbonization is performed by heating the above-mentioned cross-linked chitin under a nitrogen atmosphere.
4. In Paragraph 3, A method for manufacturing activated carbon, wherein the heating in the carbonization above is carried out at 800°C to 1200°C for 1 to 3 hours.
5. In Article 1, A method for manufacturing activated carbon, wherein the above activation is achieved by raising the temperature of the carbonized material under a nitrogen atmosphere, and then heating it under a superheated steam atmosphere while maintaining the temperature.
6. In Article 1, A method for manufacturing activated carbon, wherein the above activation is achieved by raising the carbonized material to 800°C to 1200°C under a nitrogen atmosphere, and then heating it under a superheated steam atmosphere for 0.1 to 3 hours while maintaining the temperature.
7. Activated carbon manufactured by the manufacturing method of any one of claims 1 to 6.
8. In Article 7, Activated carbon having a BET specific surface area of 1400 m² /g or more.

Description

Activated Carbon and Method for Manufacturing the Same The present invention relates to activated carbon and a method for manufacturing the same. Specifically, the present invention relates to activated carbon produced by carbonizing and activating cross-linked chitin and a method for manufacturing the same. Activated carbon is a porous carbon material with fine pores and has a large surface area, making it highly adsorbent. Due to these characteristics, activated carbon is utilized in industrial settings to remove harmful substances, such as for air purification or water treatment systems. Activated carbon can be manufactured by subjecting activated carbon raw materials to special heating or chemical treatment processes. Conventionally, activation reactions have been carried out using complex substances such as strong acids or strong bases; however, this method is complex, can pollute the environment, and has poor economic feasibility. Furthermore, when coal is used as a raw material for activated carbon, by-products such as tar-like substances or waste gases cause environmental pollution, leading to problems where time and costs are consumed for by-product treatment. Therefore, there is a need to develop technology for manufacturing activated carbon with excellent adsorption properties while reducing environmental pollution. Figure 1 is an XRD curve of activated carbon prepared according to one embodiment and a comparative example of the present invention. Figure 2 shows the measurement results of La and Lc of activated carbon prepared according to one embodiment and a comparative example of the present invention. The description of the present invention with reference to the drawings is not limited to specific embodiments and may be subject to various modifications and may have various embodiments. Furthermore, it should be understood that the following description includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. The singular expressions used in the present invention include plural expressions unless the context clearly indicates otherwise. In addition, terms such as "comprising" or "having" as used below should be interpreted as indicating the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. The present invention will be described in detail below with reference to the examples and drawings. The method for manufacturing activated carbon according to the present invention comprises the steps of: cross-linking chitin using glutaraldehyde; carbonizing the cross-linked chitin to produce a carbonized product; and activating the carbonized product to produce activated carbon. The activated carbon produced according to the method for producing activated carbon of the present invention is produced by carbonizing and activating cross-linked chitin using glutaraldehyde, thereby improving the crystallinity and BET specific surface area of the activated carbon and having an excellent adsorption capacity for volatile organic compounds. Chitin's Bridges First, chitin is cross-linked using glutaraldehyde. The step of crosslinking chitin may include: a step of preparing an aqueous glutaraldehyde solution (S110); a step of preparing a chitin solution by impregnating chitin in the prepared aqueous glutaraldehyde solution (S120); a step of crosslinking chitin by heating the prepared chitin solution (S130); a step of washing the crosslinked chitin (S140); and a step of drying the crosslinked chitin after washing (S150). First, an aqueous glutaraldehyde solution is prepared (S110). An aqueous glutaraldehyde solution may comprise distilled water and glutaraldehyde (( CH₂ ) ₃ (CHO) ₂ ). According to one embodiment, the aqueous glutaraldehyde solution consists of distilled water and glutaraldehyde. In an aqueous solution of glutaraldehyde, the content of glutaraldehyde may be 0.1 mole to 10 mole per 1 L of distilled water. Next, chitin is loaded onto the prepared glutaraldehyde aqueous solution to prepare a chitin solution (S120). In the chitin solution, the chitin content is 1 g to 30 g, preferably 2 g to 25 g, per 1 mole of glutaraldehyde. In one embodiment, the chitin content may be 2g to 10g per 1 mole of glutaraldehyde, preferably 2g to 5g. If the chitin content per 1 mole of glutaraldehyde is 10g or less, the specific surface area of the activated carbon may be 1450m² /g or more. In one embodiment, the chitin content may be 3g to 5g per 1 mole of glutaraldehyde, and when having the above content, the specific surface area of the activated carbon increases significantly, so the adsorption capacity of the activated carbon can be greatly improved. Next, the prepared chitin solution is heated to cross