KR101561594B1 - Bamboo activationcarbon and fabricating method thereof - Google Patents

Abstract

The present invention relates to a bamboo activated carbon and a method for producing the bamboo activated charcoal. Bamboo charcoal cleaning step (S2 step); A char powder production step (S3); An organic impurity removing step (S4); A filtering step (S5 step); Mixing step (step S6); A first heating step (S7); And the second heating step (Step S8), thereby minimizing the structural change of the rotary kiln while promoting the activation reaction. Thus, the micropores can be formed more rapidly and the activation reaction can be promoted so that more micropores can be formed Bamboo charcoal is heat-treated with KOH to obtain a bamboo activated carbon having a specific surface area of at least 2000 m 2 / g, a carbon content of 80 wt% or more and a capacitance of 40 F / g or more.

Description

Bamboo activated carbon and fabricating method

The present invention relates to a bamboo activated carbon and a method for producing the bamboo activated carbon. More particularly, the present invention relates to a bamboo activated carbon having improved specific surface area of 2000 m 2 / g or more and bamboo activated charcoal Bamboo activated carbon and a process for producing the same.

Generally, bamboo activated carbon has fine porous structure, and beneficial microbial growth on the surface based on the acidity and active points of the micro surface, adsorbed foreign matter and microorganisms on the surface can be widely used for purifying air and water, It is possible to remove odor and control humidity by adsorbing and removing odor causing substances.

Such bamboo activated carbon is heated in a carburizing furnace, for example, a rotary kiln furnace, at a high temperature of 800 to 1200 ° C. in the form of pieces or particles of bamboo charcoal. When water vapor is supplied in a deteriorated state, various gasification reactions ).

That is, C + H ₂ O? CO + H ₂

CO + H ₂ O? CO ₂ + H ₂

C + 2H ₂ O? CO ₂ + 2H ₂

C + CO ₂ → 2CO

Since the activation reaction is an endothermic reaction, the temperature may be rapidly lowered in the kiln furnace, and therefore the internal temperature should be maintained within the range of 800 to 1200 ° C by a heating device.

As a result of this activation reaction, many fine pores are formed in the bamboo activated carbon, but carbon can be burned at an excessively high temperature, and the carbonization process takes a long time at a too low temperature, resulting in decreased productivity and less micropores. The quality of the activated carbon is deteriorated and the fuel cost is increased due to the prolonged carbonization process. Therefore, the temperature control in the activation furnace is a key point of the bamboo activated carbon manufacturing apparatus.

The present invention was made to solve the problem of a conventional rotary kiln (regardless of the rotation, which is possible in any type of furnace), and its object is to minimize the structural change of the rotary kiln The present invention provides an improved bamboo activated carbon and a method for producing the bamboo activated carbon.

Another object of the present invention is to provide a bamboo activated carbon having a specific surface area of not less than 2000 m 2 / g by heat-treating bamboo charcoal with KOH to promote the activation reaction so that more micropores can be formed, and a method for producing the same.

Another object of the present invention is to provide a bamboo activated carbon having a carbon content of 80 wt% or more and a capacity of 40 F / g or more, and a method for producing the same, by heat treating bamboo charcoal together with KOH so as to promote activation reaction so that more micropores can be formed There is.

In order to accomplish the above object, the present invention provides a bamboo activated charcoal and a method of manufacturing the same, wherein the bamboo charcoal is produced by heating bamboo pieces to carbonize the bamboo charcoal to obtain bamboo charcoal having fine pores (step S1); A bamboo char cleaning step (S2) of cleaning the bamboo charcoal produced in the bamboo charcoal manufacturing step (S1 step) with distilled water; A step (S3) of producing charcoal powder by bamboo charcoal obtained through step S2 by means of a blender to produce charcoal powder; An organic impurity removing step (S4) of immersing the char powder obtained in the step (S3) of preparing the char powder into 3M HCL to remove organic impurities; A filtering step (S5) of filtering the char powder from which the organic impurities have been removed through the organic impurity removing step (S4), by a vacuum filter method; A mixing step (S6) of grinding the bamboo charcoal powder that has been subjected to the KOH and the filtering step (S5 step) so as to mix the mixture in a ratio of 1: 1 to 10: 1; A first heating step (S7) of heating the mixed mixture at 200 to 500 DEG C for at least 5 minutes in the mixing step (S6); And a second heating step (S8 step) in which the mixture after the first heating step (S7 step) is heated at 800 DEG C or higher for 5 minutes or more.

The present invention relates to a method for promoting an activation reaction by minimizing a structural change to a rotary kiln, thereby more rapidly forming micropores and promoting an activation reaction so that micropores can be formed more. It is possible to produce bamboo activated carbon having a specific surface area of not less than 2000 m 2 / g and a carbon content of not less than 80 wt% and a capacitance of not less than 40 F / g.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 2 is a graph showing the results of X-ray diffraction of bamboo charcoal (bare), 900 ° heat treatment (H900), samples annealed with KOH at 800 ° and 900 °,
3 is a graph showing the results of specific surface area (BET) nitrogen absorption experiments of samples heat-treated with KOH at 800 ° C and 900 ° C.

Hereinafter, preferred embodiments of the bamboo activated carbon of the present invention and the method for producing the same will be described in detail with reference to the accompanying drawings.

2 is a graph showing the results of X-ray diffraction of bamboo charcoal (bare), 900 degree heat treatment (H900), samples heat-treated with KOH at 800 degrees and 900 degrees, and graph 3 is a graph showing the results of absorption of specific surface area (BET) nitrogen of samples heat treated with KOH at 800 ° C and 900 ° C. The bamboo activated carbon of the present invention and the method for producing the same were prepared by heating bamboo pieces to carbonize the bamboo charcoal (Step S1) of producing bamboo charcoal; A bamboo char cleaning step (S2) of cleaning the bamboo charcoal produced in the bamboo charcoal manufacturing step (S1 step) with distilled water; A step (S3) of producing charcoal powder by bamboo charcoal obtained through step S2 by means of a blender to produce charcoal powder; An organic impurity removing step (S4) of immersing the char powder obtained in the step (S3) of preparing the char powder into 3M HCl to remove organic impurities; A filtering step (S5) of filtering the char powder from which the organic impurities have been removed through the organic impurity removing step (S4), by a vacuum filter method; A mixing step (S6) of grinding the bamboo charcoal powder that has been subjected to the KOH and the filtering step (S5 step) so as to mix the mixture in a ratio of 1: 1 to 10: 1; A first heating step (S7) of heating the mixed mixture at 200 to 500 DEG C for at least 5 minutes in the mixing step (S6); And a secondary heating step (S8 step) in which the mixture after the primary heating step (S7 step) is heated at 800 DEG C or higher for 5 minutes or more.

The heat treatment in the first heating step (S7 step) and the second heating step (S8 step) is performed in an inert gas atmosphere or an atmospheric pressure state.

The bamboo activated carbon having a specific surface area of 2,000 m 2 / g or more, a carbohydrate content of 80 wt% or more, and a capacitance of 40 F / g or more was produced by the production method described in the above item 1.

Example

Bamboo activated carbon was prepared by the method of the present invention.

Bamboo activated carbon was prepared in steps S1 to S8. At this time, the first heating step (S7 step) was heated at 400 DEG C for 30 minutes, and the second heating step (S8 step) was heated at 800 DEG C for 30 minutes.

The bamboo activated carbon produced as described above was used as a sample (H800_KOH).

The bamboo activated carbon produced by heating the secondary heating step (S8 step) for 30 minutes at 900 DEG C was used as a sample (H900_KOH), charcoal (H900) heated with ordinary bamboo charcoal (bare) - ray diffraction was obtained and shown in Fig.

From FIG. 2, it can be seen that the strength of bamboo activated carbon (H800_KOH, H900_KOH) produced by the method of the present invention is excellent.

The BET surface area, the pore volume, and the average pore size of the pores were determined for the samples of the above examples, and the results are shown in Table 1 below. The adsorption of specific surface nitrogen on activated carbon (H800_KOH, H900_KOH) was experimented and the results are shown in FIG.

SAMPLE
Name BET surface
area (m 2 / g) Pore Volume
(Cm3 / g) Average pore
size (Å)  Bare         67     0.0352        21.1  H900         70     0.0412        21.5  H800_KOH        3061       1.5        19.1  H900_KOH        2961       1.6        21.6

From Table 1 and FIG. 3, it can be confirmed that the specific surface area of the bamboo activated carbon (H800_KOH, H900_KOH) produced by the method of the present invention is not less than 2000 m 2 / g.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited thereto and that various changes and modifications may be made therein without departing from the scope of the invention.

Claims (6)

Bamboo charcoal manufacturing step (S1 step) of heating bamboo pieces to carbonize them to obtain bamboo charcoal having fine pores; A bamboo char cleaning step (S2) of cleaning the bamboo charcoal produced in the bamboo charcoal manufacturing step (S1 step) with distilled water; A step (S3) of producing charcoal powder by bamboo charcoal obtained through step S2 by means of a blender to produce charcoal powder; An organic impurity removing step (S4) of immersing the char powder obtained in the step (S3) of preparing the char powder into 3M HCL to remove organic impurities; A filtering step (S5) of filtering the char powder from which the organic impurities have been removed through the organic impurity removing step (S4), by a vacuum filter method; A mixing step (S6) of grinding the bamboo charcoal powder that has been subjected to the KOH and the filtering step (S5 step) so as to mix the mixture in a ratio of 1: 1 to 10: 1; A first heating step (S7) of heating the mixed mixture at 200 to 500 DEG C for at least 5 minutes in the mixing step (S6); And a second heating step (S8 step) in which the mixture after the first heating step (S7 step) is heated at 800 DEG C or more for 5 minutes or more. The method according to claim 1, wherein the heat treatment in the first heating step (S7 step) and the second heating step (S8 step) are performed in an inert gas atmosphere. The method according to claim 1, wherein the heat treatment in the first heating step (S7 step) and the second heating step (S8 step) are performed at atmospheric pressure. delete delete delete

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