KR20040093524A - Activated carbon material substitute using a by-product of the petrochemistry process - Google Patents

Abstract

PURPOSE: Provided is an activated carbon material substitute using by-products of petrochemistry processes which shows better adsorption capacity than that of activated carbon using charcoals and the like and is able to reduce the manufacturing cost. CONSTITUTION: The activated carbon material substitute using by-products of petrochemistry processes is characterized in that it uses raw materials of the activated carbon containing 93.5-97 wt.% of carbon, 3-6.5 wt.% of lime and having a grain size of 1-50 micrometers.

Description

Activated carbon material substitute using a by-product of the petrochemistry process}

The present invention relates to a raw material of activated carbon used in the production of activated carbon, and relates to an activated carbon raw material substitute using a by-product of the petrochemical process using the by-product generated during the petrochemical process.

Generally, activated carbon is a porous carbon material having strong adsorption due to the development of a pore structure. Carbon, charcoal, lignite, peat, etc., generated during the combustion of solid inorganic or organic materials, are carbonized together with an activator or activated with charcoal by steam. To prepare.

Raw materials mainly used to produce such activated carbon include coconut, coal, wood, ligrin, and the most popular is coconut shell activated carbon made of palm bark with the most developed double pore structure.

In addition, activated carbon is classified into powder activated carbon, fibrous activated carbon, granular activated carbon, etc. according to powder state and particle state, and is used for deodorization, decolorization, adsorption removal of pollutants such as organic compounds.

Here, in more detail with respect to the general activated carbon currently produced, the general activated carbon has a specific surface area of about 800 to 1,000 m ² / g, an iodine adsorption capacity of about 900 to 1,100 mg / g, and 150 to 180 ml / g of methylene Has blue bleaching power.

In addition, the composition and particle size of carbon and ash for the raw materials of such activated carbon (ash, charcoal, coal, peat, etc.) are about 75 to 90 wt% carbon, about 10 to 20 wt% ash, and about 0.20 particle size. ˜0.50 mm.

However, activated carbon that uses coal or peat, which are solid minerals, as a raw material of the currently produced activated carbon has a problem of mining the raw material, and if the raw material is charcoal, there is a problem of felling trees and using coconut as a raw material. Coconut shell activated carbon has to import natural coconut shell, which is the main material, from abroad, so there are problems such as difficulty in securing, burden of transportation cost and outflow of foreign currency.

Therefore, due to such a problem, the development of alternative raw materials that are not only low in cost of raw materials but also easy to supply and have performance comparable to that of currently produced activated carbon is urgently emerging.

Meanwhile, carbon material, which is a material of activated carbon, is generated as a byproduct during the operation of a petrochemical process for producing basic raw materials of petrochemical products, and the most representative of such byproducts is unreacted carbon.

Here, the unreacted carbon will be described in detail. The unreacted carbon may be partially oxidized in a gasification reactor by using a boiler (steam) and an oxygen preheater in a gasification reactor. It is produced by 1 ~ 2% in the production of + H ₂ ) or by-products when bunker oil and other oils are used as fuel and burned in the combustion chamber.

Although unreacted carbon generated during the petrochemical process is composed of carbon powder and ash, it is a high-quality raw material suitable for activated carbon.In the petrochemical plant, it is incinerated and disposed of as industrial waste due to lack of expertise on activated carbon. Are disposed of.

Meanwhile, the applicant of the present invention grasps the characteristics of the unreacted carbon generated during the petrochemical process, and has filed a patent application for the method and apparatus for producing activated carbon using the same prior to the present invention. It was registered as Patent Registration No. 364984 (Name: Manufacturing method and apparatus for powder activated carbon) on March 3rd.

Therefore, the applicant of the present invention manufactured activated carbon by the above-described method and manufacturing apparatus of Patent No. 364984. As a result of experimenting with the activated carbon, it was confirmed through experiments that the activated carbon had better adsorption capacity than the general activated carbon described above.

The reason why the activated carbon by the applicant of the present invention is excellent is that not only the ash content is finer but also the finer particle size than the conventional activated carbon. On the contrary, the conventional activated carbon has high ash content and fine particle size, so that the adsorption capacity is not good. There is an inadequate problem.

In addition, the general activated carbon is required to make a carbon material through a carbonization process, such as natural materials or coal as a raw material, so the carbonization process is necessary, and thus there is a problem that excessive manufacturing cost is required.

On the other hand, the activated carbon according to the applicant of the present invention uses carbon materials that have been carbonized and activated by steam at high pressure in the petrochemical process, so that the process of carbonizing raw materials can be omitted, thereby reducing manufacturing costs.

The present invention was created to improve the conventional problems as described above and to provide activated carbon with excellent properties. By using by-products generated during the mixed gas manufacturing process of the petrochemical process or the fuel combustion process of various processes as raw materials of activated carbon, The purpose of the present invention is to provide an active carbon raw material substitute using by-products of petrochemical process, which has better adsorption capacity and can reduce manufacturing cost than activated carbon based on natural materials or coal.

1 is a process diagram schematically showing a manufacturing process for manufacturing activated carbon as an active carbon raw material substitute using the by-product of the petrochemical process according to the present invention,

Figure 2 is a photograph illustrating the activated carbon and the general activated carbon prepared from the activated carbon raw material substitute using the by-product of the petrochemical process according to the present invention.

<Explanation of symbols for the main parts of the drawings>

2-1: Dosing Machine 2-2: First Grinder

2-4: Raw Material Storage Hopper 2-8: Firing Furnace

2-9: 2nd mill 2-10: 2nd dust collector

2-11: moisture controller 2-13: first dust collector

Activated carbon raw material substitute using the by-product of the petrochemical process according to the present invention for achieving the above object is generated during the synthesis gas manufacturing process of the petrochemical process, the carbon content is 93.5 ~ 97wt% and the ash content is 3 ~ 6.5wt %, The particle size is 1 to 50㎛ characterized by using the by-product of the petrochemical process as the raw material of activated carbon.

The present invention is described in detail as follows.

Activated carbon raw material substitute using the by-product of the petrochemical process according to the present invention is a by-product generated in the petrochemical process as described in the prior art, carbon and carbon which is the most important element as the raw material of activated carbon among the components of the unreacted carbon by-product Looking at the component ratio and particle size of the ash is shown in Table 1 below.

TABLE 1

division Carbon Ash Mouth dildo Contents 93.5 to 97 3 to 6.5 1 to 50 unit wt% wt% Μm

That is, the main component of the unreacted carbon generated in the petrochemical process is about 93.5 ~ 97wt% ash, 3 ~ 6.5wt% ash, 1 ~ 50㎛ particle size, about 75 ~ 90wt% carbon ash Is about 10 to 20wt%, and the particle size is significantly different from the conventional activated carbon raw material of about 0.20 to 0.50mm.

In addition, the carbon content is much higher than the conventional activated carbon raw material, the ash content is extremely low, the particle size is also very high, it can be said to be an excellent raw material replacement material than the conventional activated carbon raw material.

In addition, the conventional activated carbon raw material has to undergo a carbonization process and a crushing and sieving process, but the raw material replacement material of the present invention is a dust type waste generated in the petrochemical process, so it does not need to undergo carbonization, pulverization, or sieving. It is a very useful raw material replacement material that can be used by omitting grinding and sieving processes.

Meanwhile, FIG. 1 is a process diagram schematically illustrating a manufacturing process of manufacturing activated carbon using an activated carbon raw material substitute using a by-product of a petrochemical process according to the present invention, which is registered by the applicant of the present invention disclosed in the description of the prior art. It shows an activated carbon manufacturing apparatus according to the patent.

As shown in the figure, unreacted carbon, which is a raw material substitute of activated carbon generated in the petrochemical process, is introduced into the first grinder 2-2 through the quantitative input machine 2-1, and the input raw material is the first grinder 2-2. ) Is crushed into 30 ~ 80 mesh (mesh) and then stored in the raw material storage hopper (2-4) by the conveyor belt (2-3).

Then, the stored raw material is introduced into the rotary kiln firing furnace (2-8) in the raw material storage hopper (2-4), the injected raw material is baked for 20 minutes at a temperature of 180 ~ 250 ° C or 350 ~ 450 ° C.

Subsequently, the calcined raw material is transferred to the second mill (2-9) and finely ground to 195 to 205 mesh, and the diatomaceous earth, white clay, bentonite, zeolite, petrochemical incineration ash, supplied from the secondary raw material storage hopper 2-12, After being mixed with ancillary materials such as anthracite incinerator ash, it is sent to the second dust collector (2-10), and the raw material collected in the second dust collector (2-10) passes through the moisture controller (2-11) in a state where the moisture content is controlled. Packed.

Here, reference numeral 2-13 denotes a first dust collector, which is a device for sucking and collecting a small amount of fine powder among the raw materials transferred from the kiln 2-8 to the second grinder 2-9. The raw material is sent to the second grinder 2-9 or to the second dust collector 2-10, and finely pulverized as described above, or the moisture content is controlled and packaged with powdered activated carbon.

Therefore, the activated carbon according to the applicant of the present invention comprises the steps of first pulverizing unreacted carbon into 30 to 80 mesh by the above-described apparatus and process; Firing the pulverized unreacted carbon at a temperature of 180 to 250 ° C. or 350 to 450 ° C. for 20 minutes; Secondly grinding the calcined unreacted carbon into 195-205 mesh; Collecting the second pulverized unreacted carbon and collecting the powdered activated carbon; It is prepared while going through; adjusting the moisture content of the collected powdered activated carbon.

On the other hand, Table 2 described below is a comparative table analyzing the physical properties of the activated carbon raw material substitute using the by-product of the petrochemical process according to the present invention by the apparatus and method described above, and the conventional powder activated carbon.

TABLE 2

Analysis item unit Invention activated carbon General activated carbon Filling wheat road kg / l 0.29 0.39 200 mesh (bond pass rate) % 96.3 91.2 325 Mesh % 90.2 82.3 Ash wt% 4.3 10.4 Hydrogen ion concentration (20 ° C) PH 7.6 8.5

As shown in Table 2, the activated carbon prepared from the activated carbon raw material substitute using the by-product of the petrochemical process of the present invention is light and fine particles, and has a low filling density as well as a superior passthrough rate compared to the general activated carbon, and the ash content is also excellent. In addition, since the hydrogen ion concentration is also close to neutral, it has better physical properties than general activated carbon.

In addition, as shown in Table 3 below, the decolorization and adsorption / removability of iodine, methylene blue, and 2,4,6-trichloropanol (Trichlorophenol), which are representative precursors of dioxins, are higher than those of ordinary activated carbon. It can be seen that it is much superior.

TABLE 3

Analysis item unit Invention activated carbon General activated carbon Iodine Adsorption mg / g 1, 170 820 Methylene Blue Decolorization ml / g 190 130 2,4,6-trichloropanol removal rate (raw water concentration 100ppm) % 73.2 63.0

In addition, the analysis results of Table 4 below comparing the activated carbon having two kinds of pore diameters show that the pore structure of the activated carbon according to the present invention is much better than that of general activated carbon. The results of the analysis within 80 kPa show that the activated carbon of the present invention is not only about three times larger in pore volume and area than general activated carbon, but also developed very evenly.

TABLE 4

Invention activated carbon General activated carbon Pore diameter range Pore increase volume (cc / g) Pore increase area (m ² / g) Pore diameter range Pore increase volume (cc / g) Pore increase area (m ² / g) 76.5 ~ 539.0 0.6599 184.714 76.5 ~ 539.0 0.0852 23.253 19.2 ~ 76.5 0.4074 441.462 19.2 ~ 76.5 0.1140 144.930

On the other hand, Figure 2 is a photograph illustrating an activated carbon and a general activated carbon prepared from activated carbon raw material substitute using the by-product of the petrochemical process according to the present invention, shown (a) is a conventional general activated carbon, (b) is the present invention Activated carbon.

As clearly shown in the drawings, the activated carbon of the present invention, unlike the general activated carbon, is not only very fine pores, but not three-dimensionally expressed, but the pores are long and deeply formed, so that the adsorption of the adsorbed material is excellent, and It is impossible to escape the substance.

In addition, since unreacted carbon, which is a raw material, is generated in a petrochemical process in which oxygen and steam are present, not only is it partially oxidized in the process to form various pores, but also it is pulverized to about 195 to 205 mesh in the manufacturing process, so that the scattering ability is very high. As it is excellent, entanglement between activated carbon particles is prevented.

In addition, the pores are developed and the powder is excellent, and the adsorption capacity of dioxins and chlorine organic compounds generated in incineration plants or polluting sites is particularly excellent.

As described above, the activated carbon raw material replacement material using the by-product of the petrochemical process according to the present invention has a high carbon content, a low ash content, and very fine pores are formed, which is suitable as a raw material of activated carbon. By manufacturing activated carbon, it is possible to produce activated carbon exhibiting superior deodorization and discoloration, and adsorption / removal of pollutants as compared with the prior art.

In addition, since raw materials are not supplied through incineration of solid inorganic or organic materials, raw materials can be supplied by collecting wastes according to the petrochemical process, and thus the supply and demand of raw materials is not only easy, but also damage to nature to prepare materials for incineration. In addition, it is a nature-friendly raw material substitute because it can prevent the discharge of waste from the petrochemical process.

The above embodiment is merely a description of the preferred embodiment of the present invention, the scope of application of the present invention is not limited to such, and can be changed as appropriate within the scope of the same idea.

Therefore, the shape and structure of each component shown in the embodiment of the present invention can be carried out by modifying, it is natural that the modification of the shape and structure belong to the appended claims of the present invention.

Activated carbon raw material replacement material using the by-product of the petrochemical process according to the present invention, the carbon content is low, ash content is low, it is suitable as a raw material for the production of activated carbon with excellent adsorptive capacity by the development of fine pores of the Om strong unit It can be used easily, and by using the waste generated in the petrochemical process, it is easy to secure the raw material and there is an effect of preventing the pollution that can prevent the discharge of waste.

In addition, it is possible to prevent coal mining and logging to use coal or charcoal as a raw material, as well as to prevent the consumption of natural materials, and to reduce the production cost since the carbonization process and post-carbonization grinding process are omitted. In addition, there is a nature-friendly effect to prevent the pollution generated in the carbonization process.

Claims (1)

In the raw material of activated carbon used to prepare activated carbon, It is generated during the synthesis gas manufacturing process of petrochemical process, but the carbon content is 93.5 ~ 97wt%, ash content is 3 ~ 6.5wt%, and the particle size is 1 ~ 50㎛. Activated carbon raw material substitute using the by-product of the petrochemical process.