TWI732974B - Fragrance inhaling article - Google Patents

Abstract

The fragrance inhaling article of the present invention includes a activated carbon having a BET specific surface area of 1050m²/g or more and a ratio of the peak intensity of the G band to the peak intensity of the D band in the Raman spectrum of 0.85 or more.

Description

Scent smell

The present invention relates to a flavor-absorbent article.

As smoking articles that allow users to taste the flavor of tobacco, there are known: burning smoking articles that provide tobacco flavor to the user by burning a tobacco flavor source; without burning the tobacco flavor source, providing tobacco flavor to the user by heating The user's heated flavor inhalation article; and the non-heated flavor inhalation article that does not heat or burn the tobacco flavor source, but provides the tobacco flavor of the tobacco flavor source to the user. In this specification, inhalation articles that allow users to taste tobacco flavor and other flavors are collectively referred to as "flavor inhalation articles".

Flavor absorbent articles generally include filters useful for filtering components from flavor sources, and the filters contain activated carbon as an adsorbent (for example, refer to International Publication No. 2008/146543). The filter tip containing activated carbon is called a charcoal filter, and is well known in this technical field. In the charcoal filter, activated carbon is used to determine the addition amount in accordance with the specifications of the product in a way that although it adsorbs off-flavor components, but does not excessively adsorb the components that provide fragrance.

It is known that if the specific surface area and pore volume of activated carbon increase, the adsorption performance increases. However, as the specific surface area and pore volume of activated carbon increase, the pores (fine pores) increase, so the strength of activated carbon decreases. Therefore, it is difficult to balance the adsorption performance and strength of activated carbon, and the present inventors focused on this.

On the other hand, in recent years, the manufacturing of flavor-absorbent articles has been speeding up, and the load on activated carbon during the manufacturing process has also continued to increase. If the load applied to the activated carbon increases, the activated carbon may be broken and the amount added to the flavor-absorbent may become uneven. It is very important to keep the added amount of activated carbon uniform in order to keep the fragrance of each item uniform.

In view of the above situation, the object of the present invention is to provide a flavor-absorbent article containing activated carbon, which has excellent adsorption performance and a stable shape.

According to one aspect of the present invention, a flavor-absorbent article can be provided, which contains activated carbon, the BET specific surface area of the activated carbon is 1050 m ² /g or more, and the peak intensity of the G band in the Raman spectrum is relative to the D spectrum The ratio of the peak intensity of the band is 0.85 or more.

According to the present invention, a flavor-absorbent article can be provided, which contains activated carbon, which has excellent adsorption performance and stable shape.

1‧‧‧Burning smoking articles

10‧‧‧Tobacco rod

10a‧‧‧Tobacco flavor source

10b‧‧‧Tobacco Roll

20‧‧‧Filter

21、24‧‧‧Filter rod

21a‧‧‧Filter material

21b‧‧‧Bar winding paper

22‧‧‧Filter forming paper

23‧‧‧Activated carbon

30‧‧‧Cigarette holder paper

Figure 1 is a cross-sectional view of the combustion type smoking article of the first embodiment.

Fig. 2 is a cross-sectional view of the combustion-type smoking article of the second embodiment.

Figure 3 is a graph showing the pore distribution curve.

Figure 4 is a graph showing the pore distribution curve.

Figure 5 is a graph showing the measurement results of Raman spectroscopy.

Figure 6 is a graph showing the measurement results of Raman spectroscopy.

Figure 7 is a graph showing the G/D ratio calculated from the measurement result of Raman spectroscopy.

Figure 8 is a graph showing the results of thermogravimetric/millisecond thermal analysis.

Figure 9 is a graph showing the measurement results of the amount of oxygen-containing functional groups.

Figure 10 is a graph showing the amount of ammonia adsorbed.

Figure 11 is a graph showing the amount of physical adsorption of ammonia and the amount of chemical adsorption of ammonia.

Figure 12 is a graph showing the adsorption isotherm of Figure 11 as a DA plot.

Figure 13 is a graph showing the reduction rate of ammonia in mainstream tobacco smoke.

Figure 14 is a graph showing the reduction rate of vapor components in mainstream tobacco smoke.

The applicant of the present invention has reported that if the activated carbon is subjected to liquid-phase oxidation treatment, a high concentration of oxygen-containing functional groups can be introduced into the surface of the activated carbon, but the BET specific surface area of the activated carbon is reduced and the adsorption capacity is reduced (Japanese Patent Application Bulletin No. 2010-193718). In this way, it is believed that if oxygen-containing functional groups are introduced on the surface of activated carbon, the π-electron covalent bond of the carbon is destroyed and ^{the defects of the SP 2} bond increase. Therefore, the peak intensity of the D band in the Raman spectrum (this is a carbon The index of graphene structural defects) increases.

Contrary to such technical knowledge, the inventors of the present invention have newly discovered that, as a result of gas phase oxidation treatment on activated carbon with a predetermined BET specific surface area, not only oxygen-containing functional groups are introduced, but the BET specific surface area of activated carbon also increases. In addition, the peak intensity of the D band in the Raman spectrum can be maintained or reduced. Based on these findings, the inventors of the present invention have completed a flavor-absorbent article containing activated carbon, which has excellent adsorption performance and a stable shape.

That is, the present invention relates to a flavor-absorbent article containing activated carbon, the BET specific surface area of the activated carbon is 1050 m ² /g or more, and the peak intensity of the G band in the Raman spectrum is relative to the D band The peak intensity ratio (hereinafter also referred to as G/D ratio) is 0.85 or more.

In this specification, the flavor-absorbent article is any inhalation article that contains a flavor source and allows the user to taste the flavor from the flavor source. Specifically, for example, a combustion type that provides the user's flavor by burning the flavor source Smoking articles; heated flavor inhaling articles that do not burn flavor sources and provide the user with flavor by heating; and non-heated flavor inhalations that do not heat nor burn flavor sources, but provide the flavor of the user's flavor source .

Hereinafter, a cigarette which is a representative example of a combustible smoking article containing a tobacco flavor source is explained.

1. Burning smoking articles

An example of a combustible smoking article will be described with reference to Fig. 1.

Fig. 1 is a cross-sectional view of the combustible smoking article 1 of the first embodiment. The combustible smoking article 1 shown in Figure 1 is a cigarette.

The combustible smoking article 1 shown in Fig. 1 includes: a tobacco rod 10 containing a tobacco flavor source 10a, and a tobacco roll paper 10b wound around and enveloping the tobacco flavor source 10a; a filter 20 , The system includes a filter plug 21, a filter forming paper 22, and activated carbon 23. Two filter plugs 21 are arranged apart from each other and separated by a hollow portion. Each filter plug 21 includes a filter material 21a and a roll The paper 21b is wound around the rod of the filter material 21a, and the filter forming paper 22 is wound around the filter rod 21 in such a way that a hollow part is formed between the two filter rods 21, and the activated carbon 23 is located in the hollow part; and A tip paper 30 is wound on the tobacco rod 10 and the filter 20 in a manner of connecting the tobacco rod 10 and the filter 20.

The combustible smoking article 1 shown in Figure 1 is arranged with two filter rods 21 separated by a hollow part. However, n (n is an integer greater than or equal to 2) filter rods may be arranged with (n-1 ) Is configured with a hollow portion, for example, n is 2 to 4, preferably n is 2 to 3, and more preferably n is 2.

In the combustible smoking article 1 shown in FIG. 1, the constituent elements of the filter 20 other than the tobacco rod 10, the activated carbon 23, and the cigarette tip paper 30 can be conventionally known. As the activated carbon 23, those described below can be used.

The BET specific surface area of the activated carbon 23 is 1050 m ² /g or more, and the ratio of the peak intensity of the G band to the peak intensity of the D band in the Raman spectrum is 0.85 or more.

The "BET specific surface area" in this specification means the specific surface area obtained by the BET adsorption isotherm (Brunauer, Emmet and Teller's equation). The BET specific surface area of the activated carbon 23 is preferably 1050 to 1600 m ² /g, more preferably 1150 to 1600 m ² /g, and still more preferably 1150 to 1300 m ² /g. When the BET specific surface area is too small, it is difficult for the activated carbon 23 to exert excellent adsorption performance. In addition, when the BET specific surface area is too large, although the adsorption performance of the activated carbon 23 is improved, the shape stability may decrease.

The "G band" in this specification refers ^{to the peak detected near 1600 cm -1} in the Raman spectrum obtained by Raman spectroscopy. The G band is derived from the graphene structure of carbon. In addition, the "D band" refers ^{to the peak detected near 1300 cm-1} in the Raman spectrum obtained by Raman spectroscopy, and the D band is derived from a defect in the carbon graphene structure. Therefore, activated carbon with a large ratio of the peak intensity of the G band to the peak intensity of the D band in the Raman spectrum (hereinafter also referred to as the G/D ratio) is highly crystallized and has fewer structural defects. It tends to be stable in shape. The Raman spectrum can be obtained, for example, by using a Raman microlaser Nicolet Almega XR (manufactured by Thermo Fisher Scientific Co., Ltd.).

The G/D ratio of activated carbon 23 is preferably 0.85 to 1.1, more preferably 0.9 to 1.1. When the G/D ratio is too small, it is difficult for the activated carbon 23 to achieve excellent shape stability. The upper limit of the G/D ratio is set according to the manufacturing limit of activated carbon.

The activated carbon 23 has, for example, an average particle diameter of 200 μm to 1000 μm, preferably an average particle diameter of 300 μm to 700 μm, and more preferably an average particle diameter of 400 μm to 600 μm. Here, the "average particle size" means the particle size (d50) at which the volume cumulative value becomes 50% in the particle size distribution obtained by the laser diffraction/scattering method.

The pore volume of the activated carbon 23 is preferably 0.5 cm ³ /g or more, more preferably in the range of 0.5 to 0.8 cm ³ /g, and still more preferably in the range of 0.52 to 0.74 cm ³ /g. When the pore volume is too small, it is difficult for the activated carbon 23 to exert excellent adsorption performance. When the pore volume is too large, although the adsorption performance of the activated carbon 23 is improved, the shape stability may decrease.

In this specification, "pore volume" means the total value of the volume of pores having a pore diameter of about 40 nm or less. The pore volume is a value calculated from the nitrogen adsorption amount when the relative pressure P/P _{0 is 0.95 in the nitrogen adsorption isotherm measured at a temperature of 77K.}

The nitrogen adsorption isotherm can be obtained as follows. First, in 77K nitrogen (boiling point of nitrogen), while slowly increasing the pressure P (mmHg) of nitrogen, the nitrogen adsorption capacity (mL/mL) of activated carbon is measured for each pressure P. Next, the value obtained by dividing the pressure P (mmHg) by the saturated vapor pressure P ₀ (mmHg) of nitrogen is used as the relative pressure P/P ₀ , and by plotting the nitrogen adsorption amount against each relative pressure P/P _0, Available adsorption isotherms. The nitrogen adsorption isotherm can be obtained using, for example, a gas adsorption amount measuring device AutoSorb-1 (manufactured by Quantachrome).

Among the pore volume of activated carbon 23, the volume of pores with a pore diameter of less than 2 nm (ie, pore volume) is preferably 0.4 cm ³ /g or more, more preferably 0.4 to 0.7 cm ³ /g Within the range of 0.4 to 0.6 cm ³ /g is more preferable. If the activated carbon 23 has the pore volume of the above-mentioned size, it is particularly advantageous in achieving excellent adsorption performance.

In this manual, the "micropore volume" is calculated from the nitrogen adsorption isotherm and the pore distribution analysis using the quenched solid density functional theory (QSDFT) method. The value.

In order to reduce the unpleasant odor of flavor-absorbing articles such as combustible smoking articles, activated carbon 23 is expected to maintain the adsorption performance of activated carbon (hereinafter, also referred to as current carbon) currently used as an adsorbent for flavor-absorbing articles. At the same time, it specifically adsorbs alkaline components. Here, among the total oxygen-containing functional groups measured by the Boehm method, the activated carbon 23 preferably has an oxygen-containing functional group composed of the following on its surface. That is, the activated carbon 23 preferably has a carboxyl group (and carboxylic anhydride group) (Group I), a lactone carboxyl group (and a lactone group) (Group II), and a phenolic hydroxyl group (Group III) as measured by the Boehm method. ) And an oxygen-containing functional group composed of a carbonyl group or a quinone group (Group IV).

In order to specifically adsorb basic components, activated carbon 23 maintains the pore structure of the current carbon, the more oxygen-containing functional groups, the better, but because the carboxyl group (and carboxylic anhydride group) (Group I) is a strong acid Because of this, there are undesirable occurrences in the filter when burning smoking articles are stored or when smoking. Doubts about by-products generated by acid-base reaction and catalyst action. Therefore, the activated carbon 23 particularly preferably has a weakly acidic oxygen-containing functional group that contributes to the adsorption of basic components.

The amount of oxygen-containing functional groups composed of carboxyl groups, lactone-type carboxyl groups, phenolic hydroxyl groups, and carbonyl groups as measured by the Boehm method of activated carbon 23 is preferably 0.6 mmol/g or more, more preferably 0.6 to 2.0 mmol/ g, and more preferably 1.0 to 2.0 mmol/g. The amount of oxygen-containing functional groups in this specification is expressed in moles of activated carbon per 1g. If the activated carbon 23 contains the oxygen-containing functional group in the above-mentioned amount, it is beneficial to selectively adsorb and remove alkaline components (such as ammonia) from the fluid inhaled by the user during the inhalation of the flavor inhaler.

The Boehm method is a well-known acid-base titration method, and is described in detail in Examples described later.

In addition, the total amount of the lactone-type carboxyl group and phenolic hydroxyl group of the activated carbon 23 measured by the Boehm method is preferably 0.3 mmol/g or more, more preferably 0.3 to 2.0 mmol/g, and still more preferably 0.4 to 2.0 mmol/g.

Furthermore, the amount of the carboxyl group of the activated carbon 23 measured by the Boehm method is preferably 0.12 mmol/g or less, more preferably 0.01 to 0.12 mmol/g.

The activated carbon 23 can be produced by subjecting a raw material activated carbon having a predetermined BET surface area to a gas phase oxidation treatment as described later. The characteristic of the activated carbon 23 manufactured in this way is that although it has a large amount of oxygen-containing functional groups on the surface of the activated carbon, there are a large amount of lactone-type carboxyl groups (Group II) and phenolic hydroxyl groups (Group II) and phenolic hydroxyl groups (Group II) in the oxygen-containing functional groups. III), less in oxygen-containing functional groups The amount of carboxyl (Group I).

The activated carbon 23 can be manufactured by a method including the following steps: carbonizing and activating an organic material to obtain a raw material activated carbon; and oxidizing the raw material activated carbon by a gas phase oxidation method.

As the organic material, well-known organic materials used as raw materials for activated carbon can be used. For example, plant materials can be used. Plant materials are, for example, fruit shells such as coconut shells and walnut shells, wood, charcoal, bamboo, etc. The typical representative is coconut shells.

Firstly, the above-mentioned organic materials are carbonized and activated to obtain raw activated carbon. The raw material activated carbon can be produced according to a well-known method for producing activated carbon. Specifically, the raw material activated carbon is produced so that the BET specific surface area is preferably 400 to 1400 m ² /g, more preferably 1000 to 1400 m ² /g. If the BET specific surface area of the raw material activated carbon is within the above range, the manufactured activated carbon 23 will have high adsorption performance and high shape stability.

The raw material activated carbon can be manufactured by carbonizing the organic material and then performing the activation treatment by the gas activation method on the carbonized organic material; it is also possible to perform the activation treatment by the chemical activation method on the organic material while simultaneously performing the activation treatment on the carbonized organic material. Carbonization and activation are used for manufacturing; organic materials can also be activated by microwave heating method, and carbonization and activation are performed at the same time.

Alternatively, the above-mentioned raw material activated carbon can also use commercially available activated carbon. In this case, activated carbon 23 can be It is produced by the method of oxidizing the raw material activated carbon by the phase oxidation method.

The oxidation treatment by the gas phase oxidation method can be carried out, for example, by the following method: treating the raw material activated carbon in air or water vapor, for example, at a temperature below 500°C, preferably 300 to 500°C 1 to 2 hours. The oxidation treatment can be carried out by continuous oxidation treatment or batch oxidation treatment as described in the later-mentioned examples. If the temperature of the oxidation treatment is too high, the raw material activated carbon will undergo excessive activation, and the strength of the activated carbon will decrease, which is not preferable.

As such, the activated carbon 23 is preferably under conditions that are milder than the conditions of the oxidation treatment by the liquid phase oxidation method, specifically, under conditions that do not significantly further activate the raw material activated carbon. The raw material activated carbon is manufactured by gas-phase oxidation treatment.

In a preferred aspect, activated carbon 23 can be manufactured by a method including the following steps: carbonizing and activating organic materials to obtain raw activated carbon having a BET specific surface area of ^{1000 to 1400 m 2 /g; and activating the aforementioned raw materials} The carbon is oxidized in air or water vapor at a temperature below 500°C, preferably 300 to 500°C for 1 to 2 hours.

Alternatively, when commercially available activated carbon is used as the raw material activated carbon, the activated carbon 23 can be manufactured by a method containing the following steps: the raw material activated carbon having a BET specific surface area of ^{1000 to 1400 m 2 /g} The oxidation treatment is carried out at a temperature of 500°C or less, preferably 300 to 500°C, in the air or in water vapor for 1 to 2 hours.

The activated carbon 23 can be assembled in the filter 20 in the addition amount used in the conventional charcoal filter. When the filter 20 has a length of 17 to 31 mm and a circumference of 14.7 to 25.8 mm, the activated carbon 23 can be assembled in the filter 20 in an amount of 20 to 80 mg per filter, for example.

The part where the activated carbon 23 is assembled can be set as the path of the fluid (for example, mainstream smoke, aerosol, air, etc.) inhaled by the user during the inhalation of the flavor inhaler. Preferably, the scent-absorbing article includes a filter, and the activated carbon 23 is assembled in the filter. More preferably, the flavour inhaling article includes a flavour source (preferably a tobacco flavour source) and a filter located downstream of the flavour source, and the activated carbon 23 is assembled in the filter.

In the case of a combustible smoking article 1, the part where the activated carbon 23 is assembled can be set as the path of the mainstream smoke generated by combustion of the tobacco flavor source 10a, that is, between the tobacco rod 10 and the end of the suction side of the filter 20 between. Preferably, as shown in FIG. 1 and FIG. 2, the activated carbon 23 is assembled in the filter 20.

In addition to the activated carbon 23, the flavor inhaler may further contain well-known adsorbents, such as cellulose particles, cellulose acetate particles, etc., or well-known flavor modifiers, such as fragrances in the film. Of spice capsules and so on.

The combustible smoking article of the first embodiment has a hollow part formed between two filter rods 21, and activated carbon 23 is arranged in the hollow part, but it is also possible to make a filter by connecting the two filter rods, and The activated carbon 23 is arranged in a manner of being buried in a filter rod. The activated carbon 23 is preferably a filter rod assembled on the upstream side of the two filter rods. Flammable smoking The product is shown in Fig. 2 as the second embodiment.

Fig. 2 is a cross-sectional view of the combustible smoking article 1 of the second embodiment. The combustible smoking article 1 shown in Figure 2 is a cigarette. In Fig. 2, the same reference numerals are attached to the same components as those in Fig. 1.

The combustible smoking article 1 shown in Figure 2 contains: a tobacco rod 10 containing a tobacco flavor source 10a, and a tobacco roll 10b wound around and wrapping around the tobacco flavor source 10a; a filter 20 containing The filter rod 24 containing activated carbon and the filter rod 21, wherein the filter rod 24 containing activated carbon includes a filter material 21a, an activated carbon 23 embedded in the filter material 21a, and a rod winding paper 21b wound around the filter material 21a. The rod 21 is connected to the downstream side of the filter rod containing activated carbon, and includes a filter material 21a and a rod winding paper 21b wound around the filter material 21a; and a cigarette tip paper 30 connected to the tobacco rod 10 and the filter 20 The method is wound on the tobacco rod 10 and the filter 20.

The combustible smoking article 1 shown in Figure 2 is arranged in such a way that two filter rods are connected. However, n (n is an integer greater than or equal to 2) filter rods can also be arranged in a way that connects, for example, n It is 2 to 4, preferably n is 2 to 3, and more preferably n is 2.

In the second embodiment, the constituent elements of the filter 20 other than the tobacco rod 10 and the activated carbon 23, and the cigarette tip paper 30 may also be conventionally known. The activated carbon 23 used in the second embodiment is the same as the activated carbon 23 described in the first embodiment.

2. Other examples of scent inhaling articles

Above, the cigarette which is a representative example of combustible smoking articles is explained, but as above As mentioned, the scent inhaling article of the present invention is any inhaling article that contains a scent source and allows the user to taste the scent from the scent source. Furthermore, as the flavor source, in addition to tobacco flavor sources such as tobacco shreds, flavors such as menthol, plant extracts, essential oils, and the like can also be used.

More specifically, the flavor-tasting article may also be a well-known burning smoking article other than cigarettes, such as a pipe, a pipe, a cigar, or a cigarillo.

In addition, the fragrance inhaling article, as described above, may also be a heating type fragrance inhaling article that does not burn a fragrance source and provides a fragrance to the user by heating.

Heating type aroma inhalers, for example: carbon heat source type inhalers, which use the combustion heat of the carbon heat source to heat the aroma source to produce an aerosol containing aroma and flavor components (for example, refer to International Publication No. 2006/073065 ); Electric heating type inhaler, is equipped with a taster body containing a capsule containing a liquid flavor source, and a heating element used to electrically heat the taster body, and the capsule outer film is melted by electric heating It releases a liquid flavor source (for example, refer to WO2010/110226); or an electrically heated inhaler, which is equipped with a replaceable tobacco pod (tobacco pod) that stores the tobacco flavor source and aerosol source (propylene glycol or glycerin) together pod), and the inhaler body that heats the tobacco cartridge pod by electric heating to generate aerosol (for example, refer to WO2013/025921).

Furthermore, the scent inhaling article, as described above, can also provide the user with the scent of the scent source without heating or burning the scent source. The non-heated scent inhaling items. Non-heated flavor inhalation articles, for example: a non-heated tobacco flavor inhaler in which a tobacco flavor source is stored in the inhalation box, and the user tastes the tobacco flavor from the tobacco flavor source at room temperature. (For example, refer to WO2010/110226).

3. Effect

As explained above, the aroma-absorbent article contains activated carbon with the following characteristics (i) and (ii): (i) BET specific surface area is 1050m ² /g or more, (ii) G/D ratio is 0.85 or more . In this way, the aroma-absorbent article contains activated carbon that satisfies both excellent adsorption performance and shape stability. Due to the excellent adsorption performance of activated carbon, the fragrance-absorbent article can provide users with excellent fragrance. In addition, due to the shape stability of activated carbon, the scent-absorbing articles will not cause the activated carbon to be broken during the manufacturing process, and the activated carbon can be uniformly blended in each batch, thereby keeping the scent of each article uniform.

In addition, the flavor-absorbent article preferably contains activated carbon that has the following characteristics (iii) in addition to the characteristics of (i) and (ii): (iii) carboxyl group measured by the Boehm method , The oxygen-containing functional group composed of lactone carboxyl group, phenolic hydroxyl group and carbonyl group is 0.6 mmol/g or more.

The fragrance inhaling article maintains the adsorption performance of activated carbon without oxygen-containing functional groups. With the presence of oxygen-containing functional groups, it can specifically adsorb and remove alkaline components, thereby providing users with more Excellent fragrance.

In addition, the conventional activated carbon is as described in Example 2 described later It shows that if the activation degree of activated carbon is increased and the BET specific surface area is increased, the G/D ratio will decrease (refer to the low activated carbon, current carbon and high activated carbon shown in Figure 7). As such, the conventional activated carbon cannot satisfy the above-mentioned (i) and (ii) characteristics.

4. The best implementation form

Hereinafter, the preferred embodiments of the present invention are summarized and shown.

As described above, according to one embodiment, the flavor-absorbent article contains activated carbon, the BET specific surface area of the activated carbon is 1050m ² /g or more, and the peak intensity of the G band in the Raman spectrum is relative to the peak of the D band The intensity ratio (that is, the G/D ratio) is 0.85 or more.

According to a preferred embodiment, in the above-mentioned embodiment, the flavour inhalation article further contains a flavour source, preferably a tobacco flavour source.

According to a preferred embodiment, in any of the above embodiments, the aforementioned BET specific surface area is 1050 to 1600 m ² /g, preferably 1150 to 1600 m ² /g, more preferably 1150 to 1300 m ² /g.

According to a preferred embodiment, in any of the above embodiments, the aforementioned G/D ratio is 0.85 to 1.1, preferably 0.9 to 1.1.

According to a preferred embodiment, in any of the above embodiments, the activated carbon has an average particle size of 200 μm to 1000 μm, preferably an average particle size of 300 μm to 700 μm, and more preferably an average particle size of 400 μm to 600 μm.

According to a preferred embodiment, in any of the above embodiments, the activated carbon has ^{a pore volume of 0.5 cm 3} /g or more, preferably a pore volume of 0.5 to 0.8 cm ³ /g, more preferably 0.52 to The pore volume of 0.74cm ^{3 /g.}

According to a preferred embodiment, in any of the above embodiments, the activated carbon has ^{a pore volume of 0.4 cm 3} /g or more, preferably 0.4 to 0.7 cm 3 /g, and more preferably 0.4 to 0.7 cm ³ /g. The pore volume of 0.6cm ^{3 /g.}

According to a preferred embodiment, in any of the above embodiments, the amount of oxygen-containing functional groups composed of carboxyl groups, lactone carboxyl groups, phenolic hydroxyl groups, and carbonyl groups measured by Boehm method of the activated carbon is 0.6 mmol /g or more, preferably 0.6 to 2.0 mmol/g, more preferably 1.0 to 2.0 mmol/g.

According to a preferred embodiment, in any of the above embodiments, the total amount of the lactone-type carboxyl group and phenolic hydroxyl group of the activated carbon measured by the Boehm method is 0.3 mmol/g or more, preferably 0.3 to 2.0 mmol /g, more preferably 0.4 to 2.0 mmol/g.

According to a preferred embodiment, in any of the above embodiments, the amount of carboxyl groups of the activated carbon measured by the Boehm method is 0.12 mmol/g or less, preferably 0.01 to 0.12 mmol/g.

According to a preferred embodiment, in any of the above-mentioned embodiments, the aforementioned activated carbon is derived from a plant-based activated carbon of a plant material.

According to a preferred embodiment, in any of the above embodiments, the aforementioned activated carbon is coconut shell-based activated carbon derived from coconut shell.

According to a preferred embodiment, in any of the above embodiments, the aforementioned activated carbon is produced by a method including the following steps: carbonizing and activating organic materials to obtain raw activated carbon; The aforementioned raw material activated carbon is oxidized. In the implementation form In the state, the aforementioned organic material is preferably a plant material, more preferably fruit shells such as coconut shells and walnut shells, wood, charcoal, or bamboo, and more preferably coconut shells.

According to a preferred embodiment, in any of the above embodiments, the aforementioned activated carbon is produced by a method including oxidizing the raw material activated carbon by a gas phase oxidation method. In this embodiment, the aforementioned raw material activated carbon is preferably obtained from the carbonization and activation of plant materials, more preferably obtained from the carbonization and activation of fruit shells such as coconut shells and walnut shells, wood, charcoal, or bamboo, and more preferably Carbonization and activation of coconut shell.

According to a preferred embodiment, in any of the above embodiments, the raw activated carbon has a ^{BET specific surface area of 400 to 1400 m 2} /g, preferably a BET specific surface area of 1000 to 1400 m ² /g.

According to a preferred embodiment, in any of the above embodiments, the aforementioned oxidation is performed by treating the aforementioned raw material activated carbon in air or water vapor at a temperature below 500°C, preferably 300 to 500°C1 To 2 hours.

According to a preferred embodiment, in any of the above embodiments, the aforementioned activated carbon can be manufactured by a method including the following steps: carbonizing and activating organic materials to obtain a BET specific surface area of ^{1000 to 1400 m 2 /g} Raw material activated carbon; and the aforementioned raw material activated carbon is subjected to oxidation treatment in air or water vapor at a temperature below 500°C, preferably 300 to 500°C for 1 to 2 hours. In this embodiment, the aforementioned organic material is preferably a plant material, more preferably fruit shells such as coconut shells and walnut shells, wood, charcoal, or bamboo, and even more preferably coconut shells.

According to a preferred embodiment, in any of the above embodiments, the aforementioned activated carbon is produced by a method including the following steps: raw activated carbon having a BET specific surface area of ^{1000 to 1400 m 2 /g is placed in air} Or in water vapor, the oxidation treatment is performed at a temperature of 500°C or less, preferably 300 to 500°C, for 1 to 2 hours. In this embodiment, the aforementioned raw material activated carbon is preferably obtained from the carbonization and activation of plant materials, more preferably obtained from the carbonization and activation of fruit shells such as coconut shells and walnut shells, wood, charcoal, or bamboo, and more preferably It is obtained from the carbonization and activation of coconut shell.

According to a preferred embodiment, in any one of the above embodiments, the flavor-absorbent article contains a filter, and the activated carbon is contained in the filter.

According to a preferred embodiment, in any of the above embodiments, the flavour inhaling article contains a flavour source (preferably a tobacco flavour source), and a filter located downstream of the flavour source, and the activated carbon is assembled in the filter .

According to a preferred embodiment, in any of the above-mentioned embodiments, the aforementioned flavor-absorbent article contains a multi-segment filter, and the multi-segment filter is such that n (n is an integer greater than 2) filter The rods are arranged such that (n-1) hollow parts are interposed, and the activated carbon is contained in at least one of the hollow parts. In this embodiment, n is, for example, 2 to 4, preferably 2 to 3, and more preferably 2.

According to a preferred embodiment, in any one of the above-mentioned embodiments, the aforementioned flavor-absorbent article contains a multi-stage filter, and the multi-stage filter is arranged in such a way that n (n is an integer greater than or equal to 2) filter rods are connected. ,forward The activated carbon is embedded in at least one of the aforementioned filter rods. In this embodiment, n is, for example, 2 to 4, preferably 2 to 3, and more preferably 2.

According to a preferred embodiment, in any of the above-mentioned embodiments, the aforementioned flavour inhalation article is a combustion-type smoking article, preferably a cigarette. In this embodiment, the cigarette preferably includes a tobacco rod, a filter, and a tipping paper wound on the tobacco rod and the filter in a manner that connects the tobacco rod and the filter.

According to a preferred embodiment, in any of the above-mentioned embodiments, the aforementioned fragrance inhalation article is a heated fragrance inhalation article that does not burn a fragrance source but provides a fragrance to the user by heating.

According to a preferred embodiment, in any of the above-mentioned embodiments, the aforementioned fragrance inhalation article is a non-heated fragrance inhalation article that does not heat or burn the fragrance source, but provides the fragrance of the fragrance source to the user.

[Example]

[Example 1] Evaluation of pore structure

1-1. Sample preparation

(Carbonized carbon)

The coconut shell activated carbon is crushed and sieved with a 30 to 60 mesh screen to prepare carbonized carbon.

(Low activated carbon)

Prepared coconut shell activated carbon (manufactured by FUTAMURA CHEMICAL Co., Ltd., product number: CW360BL) with an average particle diameter of 0.34 mm as low activated carbon.

(Weak Oxide Carbon)

For low-activated carbon, gas-phase oxidation treatment with low oxidation degree is performed as follows to prepare low-activated carbon weakly oxidized carbon (hereinafter, also referred to as "weakly oxidized carbon). That is, 200g of low-activated carbon is added Rotate the kiln and raise the temperature to 300°C and maintain it at the same temperature. The air humidified to 30°C with a relative humidity of about 90% is introduced into the rotary kiln at a flow rate of 24L/min under pressure and maintained at 300°C. While heating for 2 hours. After that, the treated activated carbon is taken out and cooled to prepare weakly oxidized carbon.

(Carbon oxide)

For low-activated carbon, gas-phase oxidation treatment with a moderate degree of oxidation is performed as follows to prepare low-activated carbon oxide carbon (hereinafter, also referred to as "carbon oxide). That is, 200g of low-activated carbon is added Rotate the kiln and raise the temperature to 500°C and maintain it at the same temperature. The air humidified to 30°C with a relative humidity of about 90% is introduced into the rotary kiln at a flow rate of 24L/min under pressure and maintained at 500°C. While heating for 1 hour. After that, the treated activated carbon is taken out and cooled to prepare carbon oxide.

(Strong Carbon Oxide)

For low activated carbon, gas phase oxidation treatment with high degree of oxidation is performed as follows to prepare strong oxidized carbon with low activated carbon (hereinafter, also referred to as "strong oxidized carbon). That is, 200g of low activated carbon is added Rotate the kiln and raise the temperature to 500°C and maintain it at the same temperature. The air humidified to 30°C with a relative humidity of about 90% is introduced into the rotary kiln at a flow rate of 24L/min under pressure and maintained at 500°C. While heating for 2 hours. After that, take out the treated activated carbon and cool it to prepare strong oxidized carbon.

(Current carbon)

Prepare coconut shell activated carbon (manufactured by FUTAMURA CHEMICAL Co., Ltd., product number: CW360BL) with an average particle diameter of 0.34 mm as the current carbon. Current carbon is a representative example of activated carbon currently used as an adsorbent for combustible smoking articles.

(Carbon oxide of current carbon)

The current carbon is subjected to vapor-phase oxidation treatment in the same way as the preparation of the above-mentioned carbon oxide to prepare the carbon oxide of the current carbon.

(Highly activated carbon)

The current carbon is subjected to activation treatment with a high degree of activation in the following manner to prepare highly activated carbon. That is, 200 g of current carbon was put into the rotary kiln and the temperature was raised to 900°C and maintained at the same temperature. Water was introduced into the rotary kiln at a flow rate of 0.3 mL/min, and heated for 20 hours while maintaining the temperature at 900°C. After that, the treated activated carbon is taken out and cooled to prepare highly activated carbon.

1-2. Method

Using nitrogen adsorption measurement, the pore structure of the sample prepared as described above was evaluated. Specifically, AutoSorb-1 (manufactured by Quantachrome) was used as a measuring device to evaluate the BET specific surface area, pore volume, pore volume, and pore distribution.

The details of the experiment are as follows.

As a pretreatment of the sample, ^{vacuum degassing was performed at 300°C and 10 -1} Pa or less for 3 hours.

When defining the scope of BET mapping, the method proposed by Rouqueral et al. is used.

The pore volume is calculated from the nitrogen adsorption amount when the _{relative pressure (P/P 0} ) is 0.95 in the nitrogen adsorption isotherm measured at a temperature of 77K. The pore volume means the total value of the volume of pores having a pore diameter of about 40 nm or less.

The pore distribution is analyzed based on the quenched solid density function theory (QSDFT). The "pore volume" is calculated by analyzing the pore distribution by the QSDFT method from the nitrogen adsorption isotherm.

1-3. Results

The results are shown in Figure 3, Figure 4 and Table 1.

Figure 3 shows the pore distribution curves of carbonized carbon, low activated carbon, current carbon, and high activated carbon. Figure 4 shows the pore distribution curve of weak carbon oxide, carbon oxide, strong carbon oxide and current carbon. Table 1 shows the BET specific surface area, pore volume and pore volume of each sample.

From the pore distribution curves in Figures 3 and 4, it can be seen that although weakly oxidized carbon, oxidized carbon, and strong oxidized carbon are oxidized carbons obtained by gas phase oxidation treatment on low-activated carbons, these oxidized carbons It shows the same pore distribution curve as that of low activated carbon, and the pores of low activated carbon can be maintained without being blocked by gas phase oxidation treatment.

In addition, from the detailed numerical data in Table 1, it can be seen that the BET specific surface area of weakly oxidized carbon, oxidized carbon, and strong oxidized carbon is increased compared with low activated carbon. In addition, the pore volume of weakly oxidized carbon, oxidized carbon, and strong oxidized carbon is larger than that of low activated carbon. Compared with low activated carbon, the pore volume of weakly oxidized carbon, oxidized carbon, and strong oxidized carbon is also increased.

Similarly, the oxidized carbon of the current carbon is the oxidized carbon obtained by subjecting the current carbon to the vapor phase oxidation treatment. However, compared with the current carbon, the BET specific surface area of the oxidized carbon is increased. In addition, the pore volume and pore volume of this oxidized carbon are both larger than that of current carbon.

It has been reported that if the activated carbon is subjected to liquid phase oxidation treatment, the BET specific surface area of the raw activated carbon will decrease and the adsorption capacity will decrease (Japanese Patent Laid-Open No. 2010-193718). However, when the activated carbon is subjected to gas phase oxidation treatment, the raw material activated carbon The BET specific surface area, pore volume and pore volume increase instead.

[Example 2] Evaluation of carbon surface structure

2-1. Method

With respect to the sample prepared in Example 1, the Raman spectrum was measured by the following method.

Using a microlaser Raman Nicolet Almega XR (Thermo (Fisher Technology Co., Ltd.) as a measuring device. The measurement conditions are as follows.

Laser: 532nm, 5mW output

Exposure time: 30 seconds, number of exposures: 2 times

Grating: 672 bars/mm

Diaphragm aperture: 100μm diameter pinhole

The wave crest analysis system is performed using the Voigt function.

From the peak intensity of the D band and the peak intensity of the G band in the Raman spectrum, the ratio of the peak intensity of the G band to the peak intensity of the D band (G/D ratio) is calculated.

2-2. Results

The measurement results of Raman spectroscopy are shown in Figures 5 to 7 and Table 2.

Figure 5 is a graph showing the measurement results of Raman spectra of carbonized carbon, low activated carbon, current carbon, and high activated carbon. Figure 6 is a graph showing the measurement results of Raman spectroscopy of low activated carbon, current carbon, low activated carbon carbon oxide, and current carbon carbon oxide. Figure 7 is a graph showing the G/D ratio calculated from the measurement result of Raman spectroscopy. Table 2 shows the numerical data of the G/D ratio.

As shown in Figures 5 and 7, as the degree of activation progresses (that is, the order of carbonized carbon, low activated carbon, current carbon, and high activated carbon), relative to the peak of the G band, the value of the D band The peak value increases, and the G/D ratio decreases. This shows that as the degree of activation progresses, the defects of the carbon structure increase.

As shown in Figures 6 and 7, compared with the current carbon, the peak value of the D band of the carbon oxide of the current carbon decreases, and with this, the value of the G/D ratio increases. In addition, weakly oxidized carbon, oxidized carbon, and strong oxidized carbon (these are low-activated carbon oxidized carbons) all maintain the peak intensity of the low-activated carbon D band, roughly maintaining the low-activated carbon G/D ratio value. These results show that when the defects of the carbon structure generated by the activation increase, the defects can be removed by vapor-phase oxidation treatment.

From the results of Examples 1 and 2, the following facts were investigated. Highly activated carbon with a high degree of activation has excellent adsorption performance, but the carbon structure has large defects and is unstable in shape. In contrast, if the degree of activation is lower than that of high activated carbon If low activated carbon or current carbon is subjected to gas phase oxidation treatment, the BET specific surface area and pore volume are increased ultra-small, and the defects of the carbon structure are removed. As a result, it can meet the excellent adsorption performance and shape stability at the same time. Activated carbon.

[Example 3] Influence of heating of gas phase oxidation treatment on activated carbon

3-1. Method

Regarding the current carbon prepared in Example 1, the influence of the heating of the gas phase oxidation treatment on the activated carbon was investigated. Specifically, a 6 mg sample was placed in a platinum pan, and thermogravimetry-differential thermal analysis (TG-DTA) was performed under air circulation conditions of 200 mL/min. The temperature rise is performed by raising the temperature to 100°C at a rate of 10°C/min, maintaining the temperature for more than 30 minutes, and then increasing the temperature to 650°C at a rate of 1°C/min. The device used TG/DTA6200 (manufactured by SII Nano Technology Co., Ltd.).

3-2. Results

The results are shown in Figure 8. Figure 8 is a graph showing the results of thermogravimetric/millisecond thermal analysis. Figure 8 shows the weight change (wt%) with increasing temperature.

As shown in Figure 8, if the current carbon is heated at a temperature exceeding 500°C, a rapid weight loss occurs and activation is performed. It shows that if the activated activated carbon is subjected to additional heating treatment, the activation will proceed further. Therefore, the results show that when the activated activated carbon is subjected to vapor-phase oxidation treatment, it is preferable to perform the heating temperature below 500°C.

[Example 4] Evaluation of the amount of oxygen-containing functional groups

4-1. Method

For the current carbon, weakly oxidized carbon, oxidized carbon, and strong oxidized carbon prepared in Example 1, the amount of oxygen-containing functional groups was measured.

Oxygen-containing functional groups are quantified according to the quantitative method (Boehm method) proposed by H.P. Boehm. That is, the oxygen-containing functional group is classified into a carboxyl group (Group I), a lactone carboxyl group (Group II), a phenolic hydroxyl group (Group III), and a carbonyl group (Group IV) for quantification.

The so-called Boehm method involves reacting excess reaction base (sodium bicarbonate, sodium carbonate, sodium hydroxide, or sodium ethoxide) with oxygen-containing functional groups, and adding excess acid (hydrochloric acid) to the remaining base in the reaction , And then neutralize and titrate with alkali (sodium hydroxide).

In addition, the amount of oxygen-containing functional groups in Group I was measured by neutralization titration with sodium bicarbonate. The total amount of Group I and Group II was determined by the neutralization titration of sodium carbonate. Determine the total amount of Group I, II, and III by neutralization titration with sodium hydroxide. Determine the total amount of Group I, II, III and IV by neutralization titration of sodium ethoxide.

Hereinafter, the specific measurement method is explained.

First, put 1.5 g of the sample into 50 mL of 0.05 M reaction base, and shake for 24 hours without damaging the shape of the sample. After that, the sample was filtered with filter paper, and 10 mL was separated from the filtrate.

For 10 mL of the filtrate (liquid separation), when sodium carbonate is used as the reaction base, 30 mL of 0.05 M HCl aqueous solution is added to prepare a reaction mixture. For 10mL filtrate (liquid separation), when using other alkali (sodium bicarbonate, sodium hydroxide, or sodium ethoxide) as the reaction base, add 20mL The 0.05M HCl aqueous solution was prepared into a reaction mixture.

After that, the container containing the reaction mixture was covered with a PTFE/silicon septum. The N ₂ injection needle is set to reach below the liquid surface, and the N ₂ discharge needle is set so that it does not touch the water surface, and the nitrogen is circulated for 2 hours at a rate of 1 mL/min or less. _{This removes CO 2} dissolved in the reaction mixture.

After that, the reaction mixture was transferred to a beaker that had been previously replaced with nitrogen and covered with a paraffin film, and 1 drop of an indicator phenolphthalein/ethanol solution (10 g/L) was dropped thereon. Then, insert the burette into the beaker maintained in the state of being covered with paraffin film, and while stirring with a stirrer, titrate with 0.05M NaOH aqueous solution.

The number of moles (mol) corresponding to the oxygen-containing functional group of each reaction base can be calculated as follows.

Number of moles=[n(B)/n(HCl)×[B]×V(B)-{[HCl]×V(HCl)-[NaOH]×V(NaOH)}]×V(a)/ V(B)

Here, a represents the reaction base used in the measurement. a refers to 50 mL of 0.05M reaction base in the above experiment. B represents the reaction base for liquid separation. B in the above experiment refers to 10 mL of filtrate.

[] Indicates the molar concentration used in the titration. V represents the titer (volume). n(B)/n(HCl) represents the valence ratio of reaction base to hydrochloric acid.

Therefore, if the value of the molar number mentioned above is divided by the weight of the sample, the amount of oxygen-containing functional groups per unit weight of the sample can be obtained, and if the value of the molar number mentioned above is divided by the surface area, the amount per unit weight of the sample can be calculated. The amount of oxygen-containing functional groups per unit surface area. In addition, blank measurement is also performed in each measurement, From the known molar concentrations of HCl and NaOH, the molar concentrations of other reaction bases can be calculated.

4-2. Results

The results are shown in Figure 9 and Table 3. Figure 9 is a graph showing the measurement results of the amount of oxygen-containing functional groups. Table 3 shows the numerical data of the amount of oxygen-containing functional groups. Figure 9 and Table 3 show the amount of oxygen-containing functional groups per unit weight of the sample.

As shown in Fig. 9 and Table 3, in weakly oxidized carbon, oxidized carbon, and strong oxidized carbon, the amount of oxygen-containing functional groups increases as a whole after the gas phase oxidation treatment. In particular, as the degree of oxidation of the gas phase oxidation treatment increased (that is, in the order of weakly oxidized carbon, oxidized carbon, and strongly oxidized carbon), the lactone carboxyl group (Group II) and phenolic hydroxyl group (Group II) were significantly confirmed III) Increase. In addition, regarding the carboxyl group (Group I), even if the oxidation degree of the gas phase oxidation treatment increased, the increase was not confirmed. It is believed that this is the reason why the carboxyl group (Group I) will be released even if it is formed by gas phase oxidation, as stated in the report in the Introduction to Revised Carbon Materials (1984) published by the Institute of Carbon Materials.

[Example 5] Evaluation of ammonia adsorption capacity

5-1. Method

For the current carbon, weakly oxidized carbon, oxidized carbon, and strong oxidized carbon prepared in Example 1, the adsorption capacity of ammonia was measured to evaluate the adsorption capacity of alkaline components.

Using an adsorption balance device Autosorb-1-c (manufactured by Quantachrome), the adsorption balance was measured at 25°C in a pressure range of 2 to 800 mHg. Specifically, as the pretreatment of the sample, ^{vacuum degassing was performed at 300°C and 10 -1} Pa or less for 3 hours. After that, the adsorption amount of ammonia was measured at 25°C. The amount of adsorption measured here is the total of the amount of physical adsorption and the amount of chemical adsorption.

After that, vacuum degassing is performed by turbo molecular pump at 25°C until the pressure becomes constant (it takes 2 to 3 hours), and the adsorption amount of ammonia is measured again. The amount of adsorption measured here is the amount of physical adsorption. The difference between the adsorption amount measured in the first measurement and the adsorption amount measured in the second measurement is the chemical adsorption amount.

5-2. Results

The results are shown in Figures 10 to 12. Figure 10 is a graph showing the amount of ammonia adsorption (that is, the total of the amount of physical adsorption and the amount of chemical adsorption). Figure 11 is a graph showing the amount of physical adsorption of ammonia and the amount of chemical adsorption of ammonia. In the adsorption isotherms in Figures 10 and 11, the horizontal axis represents the relative pressure (P/P ₀ ), and the vertical axis represents the equilibrium adsorption capacity (q). Figure 12 is a graph showing the adsorption isotherm of Figure 11 as a DA plot (Dubinin-Astakhov plot).

As shown in Figure 10, weakly oxidized carbon shows the same level of ammonia adsorption capacity as current carbon, and oxidized carbon and strong oxidized carbon show high ammonia adsorption capacity compared with current carbon. In addition, in Figure 10, the current carbon system is shown as an example of activated carbon with particularly excellent adsorption performance. In addition, as shown in Figure 11, weakly oxidized carbon, oxidized carbon, and strong oxidized carbon mainly adsorb ammonia by physical adsorption. However, as shown in Figure 12, in the low-concentration region of ammonia, it is confirmed that the chemical Adsorption of adsorbed ammonia.

The results of Example 4 and Example 5 show that in weakly oxidized carbon, oxidized carbon, and strong oxidized carbon, the oxygen-containing functional group functions to chemically adsorb alkaline components such as ammonia. Since chemical adsorption is related to specific adsorption, weak carbon oxide, carbon oxide, and strong carbon oxide can specifically remove alkaline components such as ammonia.

[Example 6] Evaluation of the removal rate of tobacco smoke components

6-1. Production of burning smoking articles

In this embodiment, the current carbon, weakly oxidized carbon, oxidized carbon, and strong oxidized carbon prepared in Example 1 are used as samples. Assemble the sample in the space between the two filter rods (the filter cavity portion) as shown in the first figure, thereby making As a combustible smoking article, evaluate the removal rate of tobacco smoke components.

Specifically, after inserting a 5mm acetate filter rod (5.5Y31000, plasticizer 6%) in a paper tube (outer diameter 7.7mm), adding 30 mg of sample, and then inserting the same acetate filter rod, borrow This makes a filter. As a control tobacco, a paper tube (outer diameter 7.7mm) filled with two 5mm acetate filter rods (5.5Y31000, plasticizer 6%) was made. The obtained filter was joined to a tobacco rod of a commercially available cigarette (seven star: 14 mg tar, 1.2 mg nicotine) to produce a combustible smoking article.

6-2. Method

(1) Smoking experiment

Using an automatic smoker (CERULEAN, CERULEANSM450RH), use three identical burning smoking articles with a smoking capacity of 17.5ml/sec, a smoking time of 2 seconds/puff, a smoking frequency of 1 puff/min, and a burning length of 49mm The conditions for automatic smoking, the Cambridge filter (manufactured by Borgwaldt KC Inc., CM-133) captures the particulate matter in the tobacco smoke, and the smoke passing through the Cambridge filter is captured on dry ice-isopropyl The refrigerant composed of alcohol is cooled to 10 mL of methanol (manufactured by Wako Pure Chemical Industries, Ltd., special grade reagent) at -70°C.

The Cambridge filter after the smoking test was shaken in methanol used to capture the smoke components passing through the Cambridge filter to obtain an analysis sample. Take 1μL of the obtained analysis sample with a microsyringe and analyze it by gas chromatography mass spectrometry (GC-MSD manufactured by Agilent. The models used for particle phase and vapor phase analysis are GC: 7890A, MS: 5975C, and GC: 6890A. , MS: 5973) for analysis. The experiment was repeated 3 times.

The analysis of ammonia was performed in accordance with CORESTA Recommended Method, No. 83, DETERMINATION OF AMMONIA IN MAINSTREAM CIGARETTE SMOKE BY ION CHROMATOGRAPHY May 2017. In the experiment, the combustible smoking article was automatically smoked under the conditions of a smoking capacity of 27.5ml/sec, a smoking time of 2 seconds/puff, a smoking frequency of 1 puff/30 seconds, and a burning length of 49mm. Two air collectors were collected in 0.1N sulfuric acid and analyzed by ion chromatography.

(2) Calculation of removal rate

With the following formula, the removal rate of smoke components of each combustible smoking article relative to the control cigarette was calculated.

(I)A' _control =A _control /S, _A'sample =A _sample /S

(II)T=1-A' _sample /A' _control

Here, A _sample represents the quantitative value of the smoke component obtained from the burning smoking article in which each activated carbon is placed, and A _control represents the quantitative value of the smoke component obtained from the control cigarette prepared as a comparison object.

S represents the quantitative value of the components in the smoke of standard tobacco, which is used to correct the errors caused by the operation of the smoking test on different schedules. For standard tobacco, the quantification of the components in the cigarette is carried out in each smoking test.

6-3. Results

The results are shown in Figs. 13 and 14. Figure 13 is a graph showing the reduction rate of ammonia in mainstream tobacco smoke. Figure 14 is a graph showing the reduction rate of vapor components in mainstream tobacco smoke.

As shown in Figure 13, when using oxidized carbon and strong oxidized carbon At the time, the removal of ammonia in mainstream tobacco smoke was detected. The reduction rate of ammonia in strong oxidized carbon is higher than that of oxidized carbon. In addition, lactone-type carboxyl groups (and lactone groups) (Group II) and phenolic hydroxyl groups (Group III) contribute to the adsorption of ammonia and specifically adsorb ammonia, so carboxyl groups (Group I) are not necessarily required.

In addition, when weak carbon oxides were used, the removal of ammonia in mainstream tobacco smoke was not detected. In Example 5, it was confirmed that weakly oxidized carbon adsorbs ammonia by both physical adsorption and chemical adsorption. Therefore, it is believed that the result is due to the detection accuracy of the detection method of Example 6.

類等鹼性成分之吸附率高於現行碳，顯示可專一性地除去。其顯示，由於該等氧化碳與現行碳的微孔容積大致相同，故可於維持現行碳的吸附量之同時，藉由與所導入之表面含氧官能基的相互作用而增大目的之鹼性成分的吸附量。 In addition, as shown in Figure 14, when weakly oxidized carbon, oxidized carbon, and strong oxidized carbon are used, vapor components in mainstream tobacco smoke can be sufficiently removed. In Figure 14, the current carbon data is also shown, but the current carbon-based activated carbon has particularly excellent adsorption performance. Therefore, in Figure 14, even if the weakly oxidized carbon, the oxidized carbon, and the strong oxidized carbon show a slightly lower removal rate than the current carbon, it can be regarded as showing a sufficient removal rate. Furthermore, in carbon oxide and strong carbon oxide, pyridines, pyridines

The adsorption rate of alkaline components such as serotonin is higher than that of current carbon, indicating that it can be removed specifically. It shows that since the pore volume of the carbon oxide is approximately the same as that of the current carbon, it can increase the target alkali by interacting with the introduced surface oxygen-containing functional groups while maintaining the current carbon adsorption capacity. The amount of adsorption of sexual components.

The results in Figs. 13 and 14 show that a combustible smoking article containing any one of weak carbon oxide, carbon oxide, and strong carbon oxide can sufficiently absorb and remove the vapor components in mainstream tobacco smoke, and can It specifically adsorbs and removes alkaline components such as ammonia.

1‧‧‧Burning smoking articles

10‧‧‧Tobacco rod

10a‧‧‧Tobacco flavor source

10b‧‧‧Tobacco Roll

20‧‧‧Filter

21‧‧‧Filter rod

21a‧‧‧Filter material

21b‧‧‧Bar winding paper

22‧‧‧Filter forming paper

23‧‧‧Activated carbon

30‧‧‧Cigarette holder paper

Claims (10)

A flavor-absorbent article containing activated carbon, the BET specific surface area of the activated carbon is ^{above 1050m 2} /g, and the ratio of the peak intensity of the G band to the peak intensity of the D band in the Raman spectrum is above 0.85 . According to the first item of the patent application, the amount of oxygen-containing functional groups composed of carboxyl groups, lactone-type carboxyl groups, phenolic hydroxyl groups and carbonyl groups as measured by the Boehm method of the aforementioned activated carbon It is 0.6 mmol/g or more. The scent-absorbent article according to item 1 or 2 of the scope of patent application, wherein the activated carbon has ^{a pore volume of 0.5 cm 3} /g or more. The scent-absorbent article according to item 1 or 2 of the scope of patent application, wherein the total amount of lactone-type carboxyl groups and phenolic hydroxyl groups of the activated carbon measured by Boehm method is 0.3 mmol/g or more. The scent-absorbent article according to item 1 or 2 of the scope of patent application, wherein the amount of carboxyl groups of the activated carbon measured by Boehm method is 0.12 mmol/g or less. The scent-absorbent article according to item 1 or 2 of the scope of patent application, wherein the BET specific surface area of the activated carbon is 1050 to 1600 m ² /g. The scent-absorbent article according to item 1 or 2 of the scope of patent application, wherein the aforementioned activated carbon is derived from plant-based activated carbon of plant materials. The scent-absorbent article according to item 1 or 2 of the scope of patent application, wherein the aforementioned activated carbon is coconut shell-based activated carbon derived from coconut shell. Such as the fragrance-absorbent article described in item 1 or 2 of the scope of patent application, which Wherein, the aforementioned activated carbon is manufactured by a method including the following steps: carbonizing and activating organic materials to obtain raw activated carbon; and oxidizing the aforementioned raw activated carbon by a gas phase oxidation method. The flavor-absorbent article according to item 1 or 2 of the scope of patent application, wherein the flavor-absorbent article contains a filter, and the activated carbon is contained in the filter.

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