WO2018110852A1 - Alkali-based metal-treated activated carbon material for automotive filter, and preparation method therefor - Google Patents

Abstract

The present invention relates to an alkali-based metal-treated activated carbon material for an automotive filter, and a preparation method therefor. The present invention relates to a method for preparing an alkali-based metal-treated activated carbon material for an automotive filter, comprising the steps of: preparing a mixture solution by dissolving activated carbon and an alkali metal precursor or an alkaline earth metal precursor in distilled water; preparing a first stirred solution by stirring the mixture solution at room temperature; adding an acid catalyst to the first stirred solution; preparing a second stirred solution by stirring the acid catalyst-added first stirred solution at room temperature; and preparing alkali metal oxide-activated carbon or alkaline earth metal oxide-activated carbon by filtering the second stirred solution, and then drying the same. According to the present invention, the alkali-based metal-treated activated carbon material for an automotive filter, having been prepared at a room temperature condition and through a process of adding an acid catalyst, has an effect of enabling the adsorption amount of carbon dioxide to be increased over that of a conventional activated carbon material.

Description

Activated carbon material for automobile interior filter treated with alkali metal and method for manufacturing same

The present invention relates to an activated carbon material for automobile interior filters treated with an alkali-based metal which can increase carbon dioxide adsorption performance by treating an alkali metal to activated carbon used as an automobile interior filter, and a method of manufacturing the same.

With the improvement of quality of life, the importance of air quality in residential spaces and vehicle interiors has been added, and the development and commercialization of technologies for removing various harmful components in the air are in earnest. In the meantime, as the air in the vehicle is qualitatively improved by installing the CO ₂ or the exhaust gas sensor in the vehicle interior, a new concept of the vehicle interior air filter is increasing.

In the case of the air filter used in the current vehicle interior, it is limited to the function of removing fine substances and suppressing the propagation of bacteria, but in the case of the air filter used in the luxury vehicle, VOCs gas and nitrogen It has the function to trap oxides (NO _ω ) and sulfur oxides (SO _ω ).

However, there are currently no air filters capable of capturing carbon dioxide (CO ₂ ) gas, which has been a problem for a long time.

In particular, CO ₂ is classified as a global warming gas and is regulated. When CO ₂ gas is accumulated inside a vehicle, it can be adsorbed and controlled as a dangerous gas that may cause drowsiness of the driver and lead to an accident. There is a need for a new concept filter material development study, but there is no such research.

Therefore, there is an urgent need for research and development on materials capable of implementing carbon dioxide adsorption performance by introducing appropriate functional groups into activated carbon used in vehicle interior filters.

An object of the present invention is to provide an activated carbon material for a vehicle interior filter and a method for manufacturing the same that can increase carbon dioxide adsorption performance by treating an alkali metal to activated carbon used as a vehicle interior filter.

In order to achieve the above object, the present invention provides an activated carbon material for automobile interior filters treated with alkali-based metal, the hydroxide of alkali metal or hydroxide of alkaline earth metal on the surface of the activated carbon.

In addition, the present invention comprises the steps of dissolving the activated carbon and alkali metal precursor or alkaline earth metal precursor in distilled water to prepare a mixed solution; Preparing a first stirring solution by stirring the mixed solution at room temperature; Adding an acid catalyst to the first stirring solution; Preparing a second stirring solution by stirring the first stirring solution added with the acid catalyst at room temperature; And filtering and drying the second stirring solution to produce an alkali metal oxide-activated carbon or an alkaline earth metal oxide-activated carbon. .

In the case of activated carbon materials for automobile interior filters treated with alkali-based metals prepared through the process of adding room temperature conditions and acid catalysts according to the present invention, there is an effect that can increase the amount of carbon dioxide adsorption compared to conventional activated carbon.

1 illustrates a carbon dioxide adsorption mechanism of alkali metals and alkaline earth metals;

Figure 2 is a flow chart showing a method for producing an activated carbon material for automobile interior filter treated with an alkali metal of the present invention;

3 is a view showing the carbon dioxide adsorption change amount of the activated carbon material treated with alkali metal and alkali-based metals prepared according to Example 1 and Comparative Example 1;

4 is a view showing the carbon dioxide adsorption change amount of the activated carbon material treated with alkali metal and alkali-based metals prepared according to Example 1 and Comparative Example 2;

5 is a view showing the carbon dioxide adsorption change amount of the activated carbon material treated with an alkali-based metal prepared according to Examples 1 to 3;

6 is a view showing a specific surface area measurement result (a) of activated carbon not treated with an alkali metal and a specific surface area measurement result (b) with an activated carbon material treated with an alkali metal according to Example 1;

7 shows EPMA analysis results of activated carbon not treated with alkaline earth metals;

8 is a view showing an EPMA analysis result of an activated carbon material treated with alkaline earth metals according to Example 1;

9 is a view showing an EPMA analysis result of an activated carbon material treated with alkaline earth metals according to Comparative Example 1;

10 is a view showing an EPMA analysis result of an activated carbon material treated with alkaline earth metals according to Comparative Example 2;

11 is a view showing the EPMA analysis result after storing the activated carbon material treated with alkaline earth metal-based metal according to Example 1 for 30 days in an airtight container; And

12 is a view showing the results of EPMA analysis after storing the activated carbon material treated with alkaline earth metals according to Comparative Example 2 in a closed container for 30 days.

Hereinafter, the activated carbon material for automobile interior filter treated with alkali metal of the present invention and a method of manufacturing the same will be described in more detail.

The inventors of the present invention have found that the adsorption amount of carbon dioxide can be increased by adding an acid catalyst to an activated carbon used as a filter material in a low temperature process to treat an alkali metal, thereby completing the present invention.

The present invention provides an activated carbon material for automobile interior filters treated with an alkali-based metal, on which an activated metal surface is loaded with an alkali metal hydroxide or an alkaline earth metal hydroxide.

The alkali metal may be any one selected from the group consisting of lithium (Li), sodium (Na), potassium (K), and rubidium (Rb), but is not limited thereto.

The alkaline earth metal may be any one selected from the group consisting of calcium, strontium, and barium, but is not limited thereto.

In addition, the present invention comprises the steps of dissolving the activated carbon and alkali metal precursor or alkaline earth metal precursor in distilled water to prepare a mixed solution; Preparing a first stirring solution by stirring the mixed solution at room temperature; Adding an acid catalyst to the first stirring solution; Preparing a second stirring solution by stirring the first stirring solution added with the acid catalyst at room temperature; And filtering and drying the second stirring solution to produce an alkali metal oxide-activated carbon or an alkaline earth metal oxide-activated carbon. .

1 is a view showing a carbon dioxide adsorption mechanism of alkali metals and alkaline earth metals.

Referring to the drawings, in the case of the alkali metal oxide (MO) and alkaline earth metal hydroxide (M (OH) ₂ ) it reacts with carbon dioxide to form an alkali metal carbonate or alkaline earth metal carbonate (MCO ₃ ) to adsorb carbon dioxide.

The alkali metal precursors are potassium hydride, potassium hydroxide, potassium dioxide, potassium permanganate, potassium carbonate, potassium bicarbonate, potassium chloride (Potassium chloride), Potassium iodide, Potassium bromide, Potassium fluoride, Potassium cyanide, Potassium cyanate, Potassium cyanate Potassium thiocyanate, Potassium nitrate, Potassium nitrite, Potassium sulfate, Potassium bisulfate, Potassium sulfite, Potassium hexafluorophosphate Potassium triphosphate tribasic, Dibasic potassium phosphate, Potassium dihydrogen phosphate, Potassium dichromate, Cal chromate Potassium chromate, Potassium bromate, Potassium methoxide, Potassium ethoxide, Potassium acetate, Potassium thioacetate, Potassium formate formate, Potassium iodate, Potassium periodate, Potassium chlorate, Potassium perchlorate, and Potassium borohydride It is possible to, but is not limited to.

The alkaline earth metal precursors include barium nitrate, barium hydroxide, barium chloride, barium chloride, barium sulfide, barium sulfate, barium carbonate, and barium acetate. Barium acetate, Barium oxide, Barium peroxide, Barium iodide, Barium iodide, Barium fluoride, Barium bromide, Barium perchlorate, Barium chromium (Barium perchlorate) barium chromate, barium ferrite, barium manganate, barium phosphate, barium zirconate, barium isopropoxide, barium thiosulfate (Barium thiosulfate), Barium (II) acetylacetonate hydrate, Barium iodate monohydrate, Barium metaphosphate, Dibasic barium phosphate, Sa Coming may be Ansan barium (Barium thiocyanate hydrate), and periodic acid barium (Barium periodate), and 2-ethylhexanoate, barium any one selected from the group consisting of (Barium 2-ethylhexanoate), but is not limited thereto.

The alkali metal precursor or alkaline earth metal precursor may be in a concentration of 0.025 to 3 M (mol / L), but is not limited thereto.

Specifically, when the concentration of the alkali metal precursor or alkaline earth metal precursor is less than 0.025 M, there may be a problem that the amount of carbon dioxide adsorption is lowered due to insufficient amount of metal in activated carbon, and the concentration of the alkali metal precursor or alkaline earth metal precursor is 3 When M is exceeded, the specific surface area of the activated carbon is drastically reduced, which may cause a problem of deterioration of carbon dioxide adsorption efficiency.

Therefore, the concentration of the alkali metal precursor or alkaline earth metal precursor is preferably 0.025 to 3 M, especially considering the optimization of the amount of metal and specific surface area in the activated carbon, the concentration of the alkali metal precursor or alkaline earth metal precursor is It is more preferable that it is 0.1-1 M.

The preparing of the mixed solution may be prepared by dissolving 5 to 20 parts by weight of activated carbon and 0.75 to 30 parts by weight of an alkali metal precursor or an alkaline earth metal precursor with respect to 100 parts by weight of distilled water, but is not limited thereto.

Specifically, when the activated carbon is included in less than 5 parts by weight based on 100 parts by weight of distilled water, there is a problem that the efficiency of the overall process is reduced, and also when the activated carbon is included in excess of 20 parts by weight based on 100 parts by weight of distilled water, And the alkaline earth metal precursor may not bond evenly with the activated carbon may cause a problem that the carbon dioxide adsorption efficiency is reduced.

In addition, when the alkali metal precursor or the alkaline earth metal precursor is included in an amount of less than 0.75 parts by weight based on 100 parts by weight of distilled water, the number of metal oxides of the activated carbon may be low, resulting in a decrease in carbon dioxide adsorption efficiency. Including more than 30 parts by weight of the metal precursor or alkaline earth metal precursor may reduce the specific surface area of the activated carbon to reduce the space for the carbon dioxide is adsorbed may cause a problem that can not adsorb a large amount of carbon dioxide.

Therefore, the preparing of the mixed solution is preferably prepared by dissolving 5 to 20 parts by weight of activated carbon and 0.75 to 30 parts by weight of an alkali metal precursor or an alkaline earth metal precursor with respect to 100 parts by weight of distilled water.

In particular, considering the correlation between the amount of metal in the activated carbon and the specific surface area, preparing the mixed solution is based on 100 parts by weight of distilled water, 10 to 15 parts by weight of activated carbon and 1 to 5 alkali metal precursors or alkaline earth metal precursors. It is more preferable to melt | dissolve and prepare a weight part.

The preparing of the first stirring solution may be performed by stirring the mixed solution at 100 to 400 rpm for 15 to 45 minutes at room temperature, but is not limited thereto.

Specifically, there is a problem in that the activated carbon is not properly mixed when stirring below 100 rpm when preparing the first stirring solution, and also when the stirring is exceeding 400 rpm when preparing the first stirring solution, alkali metal As soon as the oxide is combined with the activated carbon, the oxide is separated, which may cause a problem that the binding reaction does not proceed smoothly.

Therefore, it is preferable to stir at 100 to 400 rpm when preparing the first stirring solution, especially when considering that the activated carbon is stirred evenly without splashing on the substrate wall, 300 rpm when preparing the first stirring solution It is more preferable to stir with.

The adding of the acid catalyst may add a Lewis acid catalyst or an organic acid catalyst to the first stirring solution, but is not limited thereto.

Specifically, in the case where the acid catalyst added to the first stirring solution is a catalyst having weak acidity, if a large amount is added for pH control, an unintended addition reaction may proceed, so that the Lewis acid catalyst or the organic acid catalyst has strong acidity. It is preferred to be a prominent catalyst.

In addition, by adding an acid catalyst to the first stirring solution, the pH of the first stirring solution may be maintained at 1 to 3.

Specifically, when the pH of the first stirring solution is less than 1, a safety problem may occur in the subsequent treatment of the stirred solution, and when the pH of the first stirring solution exceeds 3, the reaction rate is slowed, thereby causing an additional reaction. It may cause inducible problems.

Therefore, the first stirring solution is preferably maintained at a pH of 1 to 3, especially considering the reaction rate and safety aspects, the pH of the first stirring solution is more preferably maintained at 2 to 2.5.

The Lewis acid catalyst is hydrochloric acid (HCl), bromic acid (HBr), sulfuric acid (H ₂ SO ₄ ), phosphoric acid (H ₃ PO ₄ ), carbonic acid (H ₂ CO ₃ ), titanium chloride (TiCl ₄ ), iron chloride (III) (FeCl ₃ ) and aluminum chloride (AlCl ₃ ) may be any one selected from, but is not limited thereto.

The organic acid catalyst is selected from the group consisting of sulfonic acid, picric acid, tartaric acid, citric acid, ethylenediaminetetraacetic acid, and pyrophosphoric acid. It may be any one, but is not limited thereto.

The preparing of the second stirring solution may be prepared by stirring the first stirring solution to which the acid catalyst is added at 100 to 400 rpm at room temperature for 24 to 72 hours, but is not limited thereto.

Specifically, there is a problem that the activated carbon is not properly mixed when stirring at less than 100 rpm when preparing the second stirring solution, and also when the stirring is exceeding 400 rpm when preparing the second stirring solution alkali metal As soon as the oxide binds to the activated carbon, the oxide may be separated and cause a problem in that the coupling reaction does not proceed smoothly.

Therefore, it is preferable to stir at 100 to 400 rpm when preparing the second stirring solution, especially considering that the activated carbon is stirred evenly without splashing on the substrate wall, 300 rpm when preparing the second stirring solution It is more preferable to stir with.

The step of preparing the alkali metal oxide-activated carbon or alkaline earth metal oxide-activated carbon may be prepared by filtering the second stirring solution at 80 to 200 ° C. for 4 to 8 hours, but is not limited thereto.

Specifically, in the step of preparing the alkali metal oxide-activated carbon or alkaline earth metal oxide-activated carbon, when dried to less than 80 ℃ may cause a problem that the performance is reduced due to the moisture remaining, and also exceeds 200 ℃ Drying may cause a problem that the addition reaction may proceed due to the phenomenon of the metal material bound to the activated carbon.

In addition, in the step of preparing the alkali metal oxide-activated carbon or alkaline earth metal oxide-activated carbon, when the drying is less than 4 hours, the problem of moisture remaining may occur, and if the drying for more than 8 hours, The heat applied can cause problems that the addition reaction can proceed.

Therefore, the step of preparing the alkali metal oxide-activated carbon or alkaline earth metal oxide-activated carbon is preferably prepared by drying the second stirring solution at 80 to 200 ° C. for 4 to 8 hours after filtering.

In particular, considering the drying of moisture and the blocking of addition reaction, the step of preparing the alkali metal oxide-activated carbon or alkaline earth metal oxide-activated carbon may be performed for 5 to 6 hours at 120 to 150 ° C. after filtering the second stirring solution. It is more preferable to prepare by drying.

The method may further include vacuum packaging after preparing the alkali metal oxide-activated carbon or alkaline earth metal oxide-activated carbon, but is not limited thereto.

Specifically, when the alkali metal oxide-activated carbon or alkaline earth metal oxide-activated carbon is exposed to air, carbon dioxide in the air is continuously adsorbed to the alkali metal oxide-activated carbon or alkaline earth metal oxide-activated carbon. When applied to the bar can reduce the filter performance, it is preferable to further include a vacuum packaging step.

Hereinafter, the activated carbon material for automobile interior filters treated with alkali metals of the present invention and a method for manufacturing the same according to the present invention will be described in more detail. However, the present invention is not limited by these examples.

Example 1 Activated Carbon Material for Automobile Interior Filter Treated with Alkaline Earth Metal

A mixed solution was prepared by dissolving 15 parts by weight of activated carbon and 2 parts by weight of barium hydroxide (60 parts by weight of a barium hydroxide solution when the weight was calculated at a concentration of 0.1 M) based on 100 parts by weight of distilled water.

The mixed solution prepared by using a stirrer (MSH-20A, Korean Science) was stirred at 300 rpm for 30 minutes at room temperature to prepare a first stirring solution.

Hydrochloric acid was added to the first stirring solution as an acid catalyst to maintain a pH of the first stirring solution at 2.

Using a stirrer (MSH-20A, Korean Science), the first stirring solution added with hydrochloric acid was stirred at 300 rpm for 24 hours at room temperature to prepare a second stirring solution.

Filter the alkali metal oxide-activated carbon precipitated in the second stirring solution with filter paper, and then dry the filtered alkali metal oxide-activated carbon at 120 ° C. for 6 hours to filter the alkaline earth metal. Activated carbon material was prepared.

Example 2 Preparation of Activated Carbon Material for Automobile Interior Filter Treated with Alkaline Earth Metal

Except for using barium acetate instead of barium hydroxide (Barium hydroxide), under the same conditions as in Example 1 was prepared an activated carbon material for automobile interior filter treated with alkaline earth metal.

Example 3 Preparation of Activated Carbon Material for Automobile Interior Filter Treated with Alkali Metal

Except for using potassium hydroxide instead of barium hydroxide (Potassium hydroxide), an activated carbon material for automobile interior filters treated with alkali metals was prepared under the same conditions as in Example 1.

<Comparative Example 1> Activated Carbon Material for Automobile Interior Filter Treated with Alkaline Earth Metal without Acid Catalyst

A mixed solution was prepared by dissolving 15 parts by weight of activated carbon and 2 parts by weight of barium hydroxide (60 parts by weight of a barium hydroxide solution when the weight was calculated at a concentration of 0.1 M) based on 100 parts by weight of distilled water.

The mixed solution prepared by using a stirrer (MSH-20A, Korean Science) was stirred at 300 rpm for 30 minutes at room temperature to prepare a first stirring solution.

Using a stirrer (MSH-20A, Korean Science), the first stirring solution was stirred at 300 rpm for 24 hours at room temperature to prepare a second stirring solution.

After filtering the alkali metal oxide-activated carbon precipitated in the second stirring solution with a filter paper, the filtered alkali metal oxide-activated carbon was dried at 120 ° C. for 6 hours to filter the interior of the alkali metal. Activated carbon material was prepared.

<Comparative Example 2> Activated carbon material for automobile interior filter which is free of acid catalyst and treated with alkaline earth metal stirred at high temperature

A mixed solution was prepared by dissolving 15 parts by weight of activated carbon and 2 parts by weight of barium hydroxide (60 parts by weight of a barium hydroxide solution when the weight was calculated at a concentration of 0.1 M) based on 100 parts by weight of distilled water.

The mixed solution prepared using the stirrer (MSH-20A, Korean Science) was stirred at 300 rpm for 30 minutes at 80 ° C to prepare a first stirring solution.

Using a stirrer (MSH-20A, Korean Science), the first stirring solution was stirred at 300 rpm for 24 hours at 80 ° C. to prepare a second stirring solution.

After filtering the alkali metal oxide-activated carbon precipitated in the second stirring solution with a filter paper, the filtered alkali metal oxide-activated carbon was dried at 120 ° C. for 6 hours to filter the interior of the alkali metal. Activated carbon material was prepared.

Experimental Example 1 Evaluation of Carbon Dioxide Adsorption Performance

The adsorption performance of carbon dioxide was evaluated using gas chromatography ('GC').

Specifically, the carbon-containing gas is treated with an activated carbon material for automobile interior filters treated with alkali metals prepared according to Examples 1 to 3, conventional activated carbon, and an alkali metal prepared according to Comparative Example 1. The amount of carbon dioxide adsorbed through GC was collected by flowing the activated carbon material for the vehicle interior filter and collecting the gas, and the results are shown in FIG. 3, and the conditions are as follows.

Tester: hp 6890a gc, agilent

CO2 content: 30%

-Flow rate: 0.1 ml / min

Measurement time: 90 minutes

3 is a view showing the carbon dioxide adsorption change amount of the activated carbon not treated with alkali metal and the activated carbon material treated with alkali metals prepared according to Example 1 and Comparative Example 2.

Referring to the drawings, compared to the activated carbon (2.00669 mmol / g), and the activated carbon material (3.85334 mmol / g) for car interior filters treated according to Comparative Example 1 prepared according to Example 1 It can be seen that the carbon dioxide adsorption performance of the activated carbon material (4.07508 mmol / g) for automobile interior filters treated with alkali metals is excellent.

When the acid catalyst is added, since the total solution is acidified, the alkali metal dispersibility increases, and thus the amount of carbon dioxide adsorption increased due to the relatively even distribution of the alkali metal.

In addition, when the activated carbon material for automobile interior filters treated with alkali metals prepared according to Example 1 was kept for 30 days, the reduction in carbon dioxide adsorption amount was minimal. This indicates that the amount of carbon dioxide adsorption was minimal because the alkali metals remained in the activated carbon through chemical bonds due to the addition of the acid catalyst.

On the other hand, when the activated carbon material for automobile interior filters treated with alkali metals prepared according to Comparative Example 1 was kept for 30 days, it was confirmed that the amount of carbon dioxide adsorption rapidly decreased.

Specifically, it can be seen that the amount of carbon dioxide adsorption drastically decreased because relatively polar alkali metals have less affinity with nonpolar activated carbon and move to one side, or because the physical adsorption power is reduced.

4 is a view showing the carbon dioxide adsorption change amount of the activated carbon material treated with an alkali-free metal and the alkali-based metal prepared according to Example 1 and Comparative Example 1.

Referring to the drawings, compared to the activated carbon (2.00669 mmol / g), and the activated carbon material for automobile interior filters (3.87457 mmol / g) prepared according to Comparative Example 2 prepared according to Example 1 It can be seen that the carbon dioxide adsorption performance of the activated carbon material (4.07508 mmol / g) for automobile interior filters treated with alkali metals is excellent.

That is, the manufacturing method of Example 1 is relatively mild reaction conditions (room temperature conditions) compared to the conventional method for manufacturing activated carbon material for automobile interior filters (Comparative Example 2) manufactured by reflux at high temperature (80 ° C). Activated carbon material for the filter can be prepared, the activated carbon material was confirmed that the carbon dioxide adsorption performance is excellent.

5 is a view showing a carbon dioxide adsorption change amount of the activated carbon material treated with an alkali-based metal prepared according to Examples 1 to 3.

Referring to the drawings, it was confirmed that among the various alkali-based metal precursors, the carbon dioxide adsorption performance of the activated carbon material prepared using barium hydroxide (Barium hydroxide) is the most excellent.

Experimental Example 2 Measurement of Specific Surface Area

The specific surface area of the activated carbon material for automobile interior filters treated with alkali metals prepared according to Example 1, and activated carbons not treated with alkali metals, was measured using a specific surface area meter (QUDRASORB SI).

Specifically, the Brunauer-Emmett-Teller equation is obtained by adsorbing and desorbing nitrogen gas to activated carbon materials for automobile interior filters treated with alkali metals prepared according to Example 1, and activated carbons not treated with alkali metals. The specific surface area was calculated using the Brunauer-Emmett-Teller equation (hereinafter referred to as the 'BET equation').

Referring to FIG. 6, the specific surface area of the activated carbon material for automobile interior filters treated with alkali metals prepared according to Example 1 was smaller than the specific surface area of activated carbon not treated with alkali metals.

This is because the specific surface area is reduced because the activated carbon having a porous structure is located inside and outside the pores as the hydroxide of the alkali metal formed on the surface of the activated carbon is oxidized by the reaction while the alkali-based metal is processed.

Experimental Example 3 Qualitative and Quantitative Analysis of EMPA

Electron probe micro analysis (hereinafter referred to as 'EPMA') of an activated carbon material treated with an alkali-based active carbon, an alkali-based metal according to Example 1, Comparative Example 1, and Comparative Example 2 was performed. It was.

Specifically, using an field emission probe micro analyzer (JXA8530F (5CH)), the alkali-based activated carbon, alkali metals according to Example 1, Comparative Example 1, and Comparative Example 2 were not used By analyzing the energy of the X-rays emitted from each atom by colliding the accelerated electron beam with the treated activated carbon material, the elements composed of the samples were analyzed and the results are shown below.

7 is a view showing the results of EPMA analysis of activated carbon not treated with alkali metal.

Referring to the drawings, it can be seen that the C and O elements are mainly detected in general commercially available activated carbon.

8 is a view showing the results of EPMA analysis of activated carbon material treated with alkaline earth metal elements according to Example 1.

Referring to the drawings, it can be seen that the amount of barium is significantly increased compared to FIG.

FIG. 9 is a view showing EPMA analysis results of activated carbon materials treated with alkaline earth metal elements according to Comparative Example 1. FIG.

Referring to the drawings, it can be seen that the amount of barium increased compared to FIG.

10 is a view showing the EPMA analysis results of the activated carbon material treated with alkaline earth metal elements according to Comparative Example 2.

Referring to the drawings, it can be seen that the amount of barium is increased compared to FIG.

11 is a view showing the EPMA analysis result after storing the activated carbon synthesized in Example 1 in a sealed container for 30 days.

Referring to the drawings, it can be seen that the amount of barium hardly decreased in comparison with FIG. 7. This, by the acid catalyst treatment, can induce a chemical bond between the activated carbon and barium, through which it can be seen that the barium remains in the activated carbon after 30 days.

12 is a view showing the EPMA analysis result after storing the activated carbon material according to Comparative Example 2 in a closed container for 30 days.

Referring to the drawings, it can be seen that the amount of barium is significantly reduced, which is 30 days in an airtight container because it is not possible to chemically bond between activated carbon and barium by adding an acid catalyst even if heat is applied during the reaction. After storage for a while barium does not remain inside the activated carbon it can be seen that the amount of barium significantly reduced.

As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this, The person of ordinary skill in the art to which this invention belongs, Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

Claims (14)

Activated carbon material for automobile interior filters treated with alkali-based metals, wherein an alkali metal hydroxide or alkaline earth metal hydroxide is supported on the surface of the activated carbon. The method according to claim 1, The alkali metal, Activated carbon material for automotive interior filters treated with alkali metal, characterized in that any one selected from the group consisting of lithium (Li), sodium (Na), potassium (K), and rubidium (Rb). The method according to claim 1, The alkaline earth metal is, Activated carbon material for automobile interior filter treated with alkali metal, characterized in that any one selected from the group consisting of calcium, strontium, and barium. Preparing a mixed solution by dissolving activated carbon and an alkali metal precursor or an alkaline earth metal precursor in distilled water; Preparing a first stirring solution by stirring the mixed solution at room temperature; Adding an acid catalyst to the first stirring solution; Preparing a second stirring solution by stirring the first stirring solution added with the acid catalyst at room temperature; And Filtering and drying the second stirring solution to prepare an alkali metal oxide-activated carbon or an alkaline earth metal oxide-activated carbon. The method according to claim 1, The alkali metal precursor, Potassium hydride, Potassium hydroxide, Potassium dioxide, Potassium permanganate, Potassium carbonate, Potassium bicarbonate, Potassium chloride, Potassium iodide, Potassium bromide, Potassium fluoride, Potassium cyanide, Potassium cyanate, Potassium cyanate, Potassium thiocyanate, Nitrate Potassium nitrate, Potassium nitrite, Potassium sulfate, Potassium bisulfate, Potassium sulfite, Potassium hexafluorophosphate, Potassium phosphate tribasic, Dibasic potassium phosphate, Potassium dihydrogen phosphate, Potassium dichromate, Potassium chromate, Calcium bromide Potassium bromate, Potassium methoxide, Potassium ethoxide, Potassium acetate, Potassium thioacetate, Potassium formate, Potassium formate iodate, Potassium periodate, Potassium chlorate, Potassium perchlorate, Potassium borohydride, Alkali-based metal, characterized in that any one selected from the group consisting of This method of manufacturing activated carbon material for automotive interior filters. The method according to claim 1, The alkaline earth metal precursor is Barium nitrate, Barium hydroxide, Barium chloride, Barium chloride, Barium sulfide, Barium sulfate, Barium carbonate, Barium carbonate, Barium acetate, Oxidation Barium oxide, Barium peroxide, Barium iodide, Barium iodide, Barium fluoride, Barium bromide, Barium perchlorate, Barium chromate, Barium chromate Barium ferrite, barium manganate, barium phosphate, barium zirconate, barium isopropoxide, barium isopropoxide, barium thiosulfate, Barium (II) acetylacetonate hydrate, barium iodate monohydrate, barium metaphosphate, dibasic barium phosphate, barium thiocyanate thiocyanate activated carbon for automobile interior filters treated with alkali metals, characterized in that it is any one selected from the group consisting of hydrate, barium periodate, and barium 2-ethylhexanoate. Material manufacturing method. The method according to claim 1, The alkali metal precursor or alkaline earth metal precursor, Method of producing an activated carbon material for automobile interior filter treated with alkali metal, characterized in that the concentration of 0.025 to 3 M (mol / L). The method according to claim 1, Preparing the mixed solution, Manufacture of activated carbon material for automobile interior filters treated with alkali-based metals, characterized by dissolving 5 to 20 parts by weight of activated carbon and 0.75 to 30 parts by weight of an alkali metal precursor or an alkaline earth metal precursor with respect to 100 parts by weight of distilled water. Way. The method according to claim 1, Preparing the first stirring solution, Method for producing an activated carbon material for automobile interior filter treated with alkali metal, characterized in that the mixture is prepared by stirring for 15 to 45 minutes at 100 to 400 rpm at room temperature. The method according to claim 1, Adding the acid catalyst, A method of producing an activated carbon material for automobile interior filters in which an alkali metal is treated, comprising adding a Lewis acid catalyst or an organic acid catalyst to the first stirring solution. The method according to claim 10, The Lewis acid catalyst, Hydrochloric acid (HCl), sulfuric acid (H ₂ SO ₄ ), phosphoric acid (H ₃ PO ₄ ), carbonic acid (H ₂ CO ₃ ), titanium chloride (TiCl ₄ ), iron chloride (III) (FeCl ₃ ) and aluminum chloride (AlCl ₃₎ Method of manufacturing an activated carbon material for automobile interior filter treated with alkali metal, characterized in that any one selected from the group consisting of. The method according to claim 10, The organic acid catalyst, One selected from the group consisting of sulfonic acid, picric acid, tartaric acid, citric acid, ethylenediaminetetraacetic acid, and pyrophosphoric acid. Characterized in that the method for producing an activated carbon material for automobile interior filter treated with alkali metal. The method according to claim 4, Preparing the second stirring solution, The first stirring solution to which the acid catalyst is added is prepared by stirring for 24 to 72 hours at 100 to 400 rpm at room temperature, alkali-based metal treated car activated carbon material manufacturing method. The method according to claim 4, Producing the alkali metal oxide-activated carbon or alkaline earth metal oxide-activated carbon, After the second stirring solution is filtered and dried for 4 to 8 hours at 80 to 200 ℃, characterized in that the manufacturing method of the activated carbon material for automobile interior filter treated with alkali metal.

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