CN-122029127-A - Activated carbon, filter for smoking article, and smoking article comprising same

Abstract

Disclosed is an activated carbon having excellent gas phase component removal ability. According to an aspect, there is provided an activated carbon comprising micropores (micropores) having a pore diameter of less than 2nm, the proportion of the micropores being 70vol% to 80vol% based on the total pore volume of the activated carbon, and the BET specific surface area of the activated carbon being 2,000m 2 /g or more.

Inventors

• Jin Shougao
• An Cheyuan
• WU JINGHUAN

Assignees

• 韩国烟草人参公社

Dates

Publication Date

20260512

Application Date

20250827

Priority Date

20240910

Claims (11)

1. 1. An activated carbon characterized by comprising micropores with a pore diameter of less than 2nm, The proportion of the micropores is 70vol% to 80vol% based on the total pore volume of the activated carbon, The BET specific surface area of the activated carbon is 2,000m 2 /g or more.
2. 2. The activated carbon of claim 1, wherein the activated carbon is, The volume of the above-mentioned microwells is 0.8cm3/g to 1.1cm 3 /g.
3. 3. The activated carbon of claim 1 further comprising mesopores having a pore diameter of from 2nm to 50nm, The proportion of the mesopores is 15vol% to 25vol% based on the total pore volume of the activated carbon.
4. 4. The activated carbon of claim 3, wherein, The volume of the mesopores is 0.2cm 3 /g to 0.4cm 3 /g.
5. 5. The activated carbon of claim 1 further comprising macropores having a pore size greater than 50 nm; The proportion of the macropores is 1 to 5vol% based on the total pore volume of the activated carbon.
6. 6. The activated carbon of claim 5, The volume of the macropores is 0.01cm 3 /g to 0.10cm 3 /g.
7. 7. The activated carbon of claim 1, wherein the activated carbon is, The BET specific surface area of the activated carbon is 2,200m 2 /g or more.
8. 8. The activated carbon of claim 1, wherein the activated carbon is, The total pore volume of the active carbon is more than 1.0cm 3 /g.
9. 9. A filter for a smoking article, comprising the activated carbon of any one of claims 1 to 8.
10. 10. A smoking article, comprising: Filter part A medium part arranged at one side of the filter part; the filter portion includes a filter for a smoking article according to claim 9.
11. 11. The smoking article of claim 10, wherein the smoking article comprises a rod, The filter portion includes a first portion and a second portion different from the first portion, The second portion is closer to the dielectric portion than the first portion, The second portion includes the filter for a smoking article.

Description

Activated carbon, filter for smoking article, and smoking article comprising same Technical Field The present invention relates to activated carbon, and more particularly, to activated carbon, a filter for a smoking article, and a smoking article including the same. Background In general, activated carbon is widely used for removing gas phase components, and is used for cigarette filters for reducing gas phase components in tobacco smoke. Recently, filter manufacturers and tobacco companies are conducting research aimed at reducing the gas phase components such as aldehydes in tobacco smoke. [ Prior Art literature ] [ Patent literature ] (Patent document 1) Korean patent laid-open publication No. 10-0669490 (bulletin day: 1 month 16 of 2007) Disclosure of Invention Problems to be solved by the invention According to an aspect of the present invention, there is provided an activated carbon having excellent removal ability for a gas phase component including carbonyl species and volatile organic compounds (Volatile Organic Compounds, VOCs). According to another aspect of the present invention, there is provided an activated carbon capable of reducing the smoking feel and irritation of a smoking article. According to still another aspect of the present invention, there is provided a method for preparing the above activated carbon. According to a further aspect of the present invention there is provided a filter for a smoking article comprising the activated carbon described above. According to still another aspect of the present invention, there is provided a smoking article comprising the above-described filter for a smoking article. The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention, which are not mentioned, can be understood by the following description, and can be more clearly understood by the embodiments of the present invention. In addition, it is to be easily understood that the objects and advantages of the present invention can be realized by the means described in the specification and the combination thereof. Means for solving the problems According to a first aspect of the present invention, there is provided an activated carbon comprising micropores (micropores) having a pore diameter of less than 2nm, wherein the proportion of the micropores is 70vol% to 80vol%, based on the total pore volume of the activated carbon, and the BET specific surface area of the activated carbon is 2,000m 2/g or more. According to a second aspect of the present invention, in the above first aspect, the volume of the above microwells may be 0.8cm 3/g to 1.1cm 3/g. According to a third aspect of the present invention, in the first or second aspect, the activated carbon may further comprise mesopores (Mesopore) having a pore diameter of 2nm or more and 50nm or less, and the proportion of the mesopores is 15vol% to 25vol% based on the total pore volume of the activated carbon. According to a fourth aspect of the present invention, in the third aspect, the volume of the mesopores is 0.2cm 3/g to 0.4cm 3/g. According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the activated carbon may further include macropores (Macropore) having a pore diameter of greater than 50nm, and the proportion of the macropores is 1vol% to 5vol% based on the total pore volume of the activated carbon. According to a sixth aspect of the present invention, in the fifth aspect, the volume of the large holes may be 0.01cm 3/g to 0.10cm 3/g. According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the activated carbon may have a BET specific surface area of 2,200m 2/g or more. According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the total pore volume (Total pore volume) of the activated carbon may be 1.0cm 3/g or more. According to a ninth aspect of the present invention, there may be provided a filter for a smoking article comprising the activated carbon according to any one of the first to eighth aspects described above. According to a tenth aspect of the present invention, there is provided a smoking article comprising a filter portion and a medium portion arranged on one side of the filter portion, the filter portion comprising the filter for a smoking article according to the ninth aspect. According to an eleventh aspect of the present invention, in the tenth aspect, the filter portion may include a first portion and a second portion different from the first portion, the second portion may be closer to the medium portion than the first portion, and the second portion may include the filter for a smoking article. The above solutions to the problems do not enumerate all features of the present invention and may be combined with some embodiments in this specification. The various features of the present invention and the advantages