KR20180060332A - Heat renewable porous absorbent coating electrode for removal of volatile material manufacturing mehtod and electrode by the same - Google Patents

Abstract

The present invention relates to a method for producing porous adsorbent coated electrodes for removing volatile substances capable of heat generation, which comprises the following steps: mixing a porous material and a conductor with a binder at a predetermined ratio and applying the mixture on one side of a metal plate; drying the metal plate for a predetermined time to produce a coated electrode; electrically connecting the metal plate of the produced coated electrodes and an adsorbent layer to each other to generate resistance heat by the porous material which is a nonconductor in the adsorbent layer; and desorbing volatile substances adsorbed in the porous material by the resistance heat.

Description

TECHNICAL FIELD [0001] The present invention relates to a porous adsorbent coating electrode for removing volatile substances that can be thermally regenerated, and an electrode manufactured by the same. BACKGROUND ART < RTI ID = 0.0 >

The present invention relates to a method for manufacturing a porous adsorbent coated electrode for removing volatile substances that can be thermally regenerated and an electrode manufactured thereby, and more particularly, to a method for removing volatile substances adsorbed on a porous adsorbent for removing volatile substances contained in air pollution Porous adsorbent for removal of volatile substances which can regenerate porous adsorbent by using heat generated by coating on conductor surface by mixing with graphite or black carbon which is high in conductivity and nonconductive porous graphite or black carbon. And electrodes made thereby.

In general, activated carbon is used to remove volatile organic substances, which are hydrophobic substances, from water or air, depending on the pulling force and adsorption force of the active surface. In particular, the most important factors for the removal of organic materials are the high specific surface area and pore size of activated carbon, and the specific surface area of typical activated carbon is 500-1400 m ² / g. The selectivity of these pores makes it very easy to remove organics, and the formation of pores is made during the activation process.

A patent for a method of coating activated carbon on a thin plate electrode in the method of using activated carbon to remove volatile substances is disclosed in Korean Patent No. 1109747. The above-mentioned patent is a patent of the present applicant filed on Apr. 6, 2011 and registered as Jan. 18, 2012, discloses a technique capable of removing volatile organic substances and odor gas by applying slurry activated carbon to the electrode surface and applying electricity to the electrode have.

When aluminum or iron plate is used as a positive electrode and a negative electrode, the surface of the electrode is electrostatically generated between the two electrodes due to an electric current induced by an electric field, and can be used as a surface for attaching dust in the atmosphere using static electricity.

Particularly, a polymer adhesive such as epoxy, polyester, polyvinylalcohol, and polyvinylacetate is mixed with a porous adsorbent in order to enlarge the electrostatic surface to which dust can adhere to the anode and the cathode. When coated with a thin film on the surface of the electrode, the high specific surface area of the porous adsorbent and the uniform constant current maintenance can improve the dust adhesion efficiency, as well as improve the adhesion efficiency of benzene, toluene, ethylbenzene, toluene Adsorption of volatile substances is possible at the same time.

However, if the adsorption amount of the organic substance is exceeded in the pores, a regeneration process for removing the volatile substances accumulated in the pores is required. The dust attached to the electrode surface can be removed by physical methods such as washing, vibration, etc. However, it is very difficult to desorb hydrophobic volatile substances adsorbed on activated carbon pores and can be used only for disposable use without detaching volatile substances .

Therefore, for the reuse of activated carbon, a regeneration method such as steam regeneration, chemical regeneration, and thermal regeneration should be used.

First, the steam regeneration uses an oxidizing gas such as steam, air, and carbon dioxide. The activation temperature is 800 ° C. to 900 ° C., and the regeneration time is about 8 hours.

Regeneration of medicines is carried out in chemicals such as sulfuric acid, phosphoric acid, and sodium hydroxide, and when heated at about 400 ° C, erosion occurs and is rapidly regenerated within about 3 hours. However, the biggest problem is that a chemical cleaning process is required and waste water is generated.

The heat regeneration method uses an indirect heat by constructing an electric furnace, and has a problem that the regeneration time is as long as 10 hours or more and the electric furnace construction cost is high.

Korean Patent No. 10-1109747

It is an object of the present invention to provide a regeneration method that can more easily and economically reduce an adsorbent such as activated carbon by using a thermal regeneration method.

According to an aspect of the present invention, there is provided a porous adsorbent coating electrode for removing volatile substances, which is capable of thermal regeneration, according to the present invention includes a porous adsorbent coating capable of removing a volatile substance adsorbed on a porous material by a heat regeneration method The electrode includes a metal plate and an adsorbent layer formed on one surface of the metal plate and formed by coating a porous material and a conductor with a binder to a predetermined thickness. The adsorbent layer is formed by electrically connecting the adsorbent layer and the metal plate It is preferable to remove the volatile matter adsorbed to the porous material by the resistance heat.

The adsorbent layer of the present invention is formed on at least a part of one surface of the metal plate and is formed on the other part of one surface of the metal sheet, and the porous material and the binder are mixed And a second adsorbent layer applied to the first adsorbent layer.

It is preferable that a part of the first adsorbent layer of the present invention is partially located in the region of the second adsorbent layer.

The first adsorbent layer of the present invention is preferably arranged in a grid form in the second adsorbent layer region.

A method for manufacturing a porous adsorbent coated electrode for removing volatile substances, which can be thermally regenerated, according to the present invention is a method for producing a porous adsorbent coated electrode capable of removing volatile substances adsorbed on porous materials by a heat regeneration method, And preparing a conductor; A coating step of mixing the metal plate, the porous material, and the conductor together with a binder and applying the coating to one surface of the metal plate to form an adsorbent layer; and drying the metal plate for a predetermined time.

The coating step of the present invention is preferably performed such that the weight ratio of the porous material, the conductor and the binder is 5: 1.5: 1.

The applying step of the present invention preferably includes a first adsorbent layer application step including the conductor and the binder, and a second adsorbent layer application step including the porous material and the binder.

In the applying step of the present invention, it is preferable that the first adsorbent layer is applied to at least a part of one surface of the metal plate, and the second adsorbent layer is applied to the remaining part of the surface of the metal plate.

The application step of the present invention is preferably applied so that the first adsorbent layer is located in a part of the second adsorbent layer region.

The application step of the present invention is preferably carried out so that the first adsorbent layer is arranged in the form of a grid in the second adsorbent layer region.

According to the method of manufacturing a porous adsorbent-coated electrode for removing volatile substances, which can be thermally regenerated, according to the present invention, when the adsorbent layer coated on one surface of a metal plate and each metal plate are electrically connected and energized, There is an advantage that the adsorbent layer is heated by the non-conductive component, and the volatile substance in the porous material is thereby removed, whereby the coating electrode can be continuously reused at a low cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a preferred embodiment of a porous adsorbent-coated electrode for removing volatile substances which can be thermally regenerated according to the present invention. FIG.
Fig. 2 is a configuration diagram showing the second embodiment of Fig. 1. Fig.
Fig. 3 is a configuration diagram showing the third embodiment of Fig. 1. Fig.
Fig. 4 is a configuration diagram showing the fourth embodiment of Fig. 1. Fig.

The description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

Meanwhile, the meaning of the terms described in the present application should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It is to be understood that the singular " include " or "have" are to be construed as including the stated feature, number, step, operation, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In each step, the identification code (e.g., a, b, c, etc.) is used for convenience of explanation, the identification code does not describe the order of each step, Unless otherwise stated, it may occur differently from the stated order. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present application.

Hereinafter, a method for manufacturing a porous adsorbent-coated electrode for removing volatile substances, which can be thermally regenerated by the present invention, and an electrode manufactured by the method will be described.

A method for manufacturing a coated electrode according to the present invention comprises preparing an electrode plate coated with a porous material by using a metal such as aluminum or iron plate as an electrode to remove volatile substances in the atmosphere and coating an electrode with an adsorbent, To generate heat, thereby regenerating the electrode plate coated with the porous material.

A first embodiment of an electrode manufactured by the method of producing a coated electrode according to the present invention includes an adsorbent layer 200 including a porous material, a conductor, and a binder on one side of a metal plate 100 as shown in FIG. 1 .

Since the adsorbent layer 200 is a layer containing a conductor, when the metal plate 100 and the adsorbent layer 200 are composed of a cathode and an anode, electricity is applied to the metal plate 100 and the adsorbent layer 200, The porous material acts as a resistor and generates heat, so that the volatile substance contained in the porous material is desorbed and the adsorbent layer 200 can be thermally regenerated.

2, the adsorbent layer 200 applied to one surface of the metal plate 100 is formed on at least a part of the metal plate 100 The first adsorbent layer 210 and the second adsorbent layer 220 may be formed on at least a portion of one surface of the metal plate 100.

The first adsorbent layer 210 is a layer in which a conductor and a binder are mixed and applied, and the second adsorbent layer 220 is a layer in which a porous material and a binder are mixed. Therefore, when the metal plate 100 and the first adsorbent layer 210 are composed of a cathode and an anode respectively and electricity is applied, the metal plate 100 and the first adsorbent layer 210 are energized and the second adsorbent layer 220 ) Acts as a resistor and generates heat, volatile substances contained in the porous material are desorbed and the adsorbent layer can be thermally regenerated.

3 and 4 show various modifications of the first adsorbent layer 210 and the second adsorbent layer 220, respectively. In the modification shown in FIG. 3, a part of the first adsorbent layer 210 is partially located in the region of the second adsorbent layer 220 so that the heat generation by the current flow can be more effectively performed.

4, the first adsorbent layer 210 is arranged in the form of a grid in the second adsorbent layer 220, so that heat can be generated in the form of a clad source.

Hereinafter, a method of manufacturing a coated electrode for manufacturing an electrode according to the present invention will be described in detail.

A method for manufacturing a coated electrode according to the present invention includes: preparing a metal plate, a porous material, and a conductor (S100); A coating step (S200) of mixing the porous material and the conductor with a binder at a predetermined ratio and applying the mixture to a metal plate; And a drying step (S300) of drying the coated adsorbent layer for a predetermined period of time.

First, in the preparation step (SlOO), a metal plate 100, a porous material, a conductor, and a binder are prepared. The metal plate 100 may be made of aluminum or an iron plate excellent in electrical conductivity, and preferably has a thickness of about 1 mm.

Porous materials such as activated carbon, silica gel, and zeolite have a high porosity and a specific surface area of about 1,000 m ² / g, and are capable of adsorbing air pollutants such as volatile substances by micropores (hereinafter referred to as "pores" As shown in FIG.

Since the porous material is an amorphous material, which is carbon or silicon-based, and is an insulator, a conductor, which is a conductive material, is added for conduction between the metal plate 100 and the adsorbent layer 200. A conductor is a crystalline material through which current flows and can be made of materials such as graphite or carbon black.

Porous materials and conductors are formed in powder form, and any method can be employed as long as it is finely ground. Further, a pretreatment step for removing impurities in the porous material or the conductor may be additionally added.

Accordingly, the metal plate 100, which is a conductor, can be used to mix a porous material, which is a volatile material adsorbent, with graphite or carbon black, which is a conductor, on the metal plate, and coat it with a polymer adhesive to allow current to flow.

Meanwhile, the binder for coating the porous material and the conductor on the metal plate 100 may be composed of a polymer adhesive such as epoxy, polyester, polyvinylalcohol, polyvinylacetate and the like .

When the metal plate, the porous material, and the conductor are prepared as described above, the applying step (S200) is performed in which the porous material and the conductor are mixed with the binder at a predetermined ratio and applied to the metal plate.

The weight ratio of the porous material, the conductor, and the binder is preferably 5: 1.5: 1. The mixed adsorbent can be applied to the metal plate by a spray method, a roller method or the like.

The application step S200 may include a first adsorbent layer application step (S210) and a second adsorbent layer application step (S220) as shown in FIG. The first adsorbent layer 210 may be a mixture of a conductor and a binder in a weight ratio of 1.5: 1, and the second adsorbent layer 220 may be a mixture of a porous material and a binder, 1. ≪ / RTI >

3 and 4, the first adsorbent layer 210 may be formed in a region of the second adsorbent layer 220 in order to induce an electric current flow between the first adsorbent layer 210 and the second adsorbent layer 220. [ Or may be applied in the form of a grid.

The applying step S200 may further include a forming step S230 for forming an interface between the first adsorbent layer 210 and the second adsorbent layer 220 before the application of the adsorbent layer.

In order to induce an electric current flow between the first adsorbent layer 210 and the second adsorbent layer 220, the first adsorbent layer 210 and the second adsorbent layer 220 may be separated from each other by a separate energizing member Can be installed.

The current carrying member is made of a material such as a copper wire which is easily conductive, so that electricity is smoothly conducted from the first adsorbent layer 210 to the second adsorbent layer 220, so that the second adsorbent layer 220 generates heat more effectively .

When the adsorbent layer 200 in which the porous material, the conductor and the binder are mixed is applied, a drying step (S300) for drying for a predetermined time is performed. The drying step (S300) may be performed at room temperature for about 6 hours, and then at about 100 ° C for about 6 hours.

Drying at room temperature is caused by cracking on the thin plate when dried at high temperature. Post drying is to volatilize the volatile solvent trapped in the pores of the porous material at high temperature to open pores blocked by the binder.

The results of volatile material adsorption / desorption test on the electrode manufactured by the method of manufacturing the electrode according to the present invention constituted as described above are as follows.

For the experiment of the present invention, activated carbon, a polymer binder, and black carbon were mixed at a weight ratio of 5: 1: 1.5, respectively, to a thickness of 1 mm, coated on a stainless steel electrode having a thickness of 1 mm, Respectively.

As a volatile organic chemical, a mixed gas filled with 10 ppm of benzene, toluene, ethylbenzene and xylene was injected into a closed stainless steel vessel. After about 2 hours of adsorption, a direct current voltage of about 20 V was supplied to the electrode, The adsorbed and desorbed residual concentration was determined repeatedly by adsorption and desorption.

Table 1 below shows the experimental results. Benzene and toluene showed very high adsorption rate and desorption ratio of 90% or more. However, in the case of ethylbenzene and xylene, the adsorption rate was high but the desorption rate was somewhat lower than benzene and toluene. This is because ethylbenzene and xylene have higher hydrophobicity than benzene and toluene, and thus the adsorption rate is higher and conversely the desorption rate is lowered.

Number of times Item Benzene
(ppm) Tolune
(ppm) Ethylbenzene
(ppm) Xylene
(ppm) 0 Initial concentration 10 10 10 10 One Residual concentration after adsorption 0.01 0.01 0.001 0.001 Concentration after desorption 9.5 9.0 6.5 6.0 2 Residual concentration after adsorption 0.001 0.002 0.001 0.001 Concentration after desorption 9.2 9.2 5.8 6.3 3 Residual concentration after adsorption 0.1 0.2 0.001 0.001 Concentration after desorption 9.3 9.1 6.2 5.9 4 Residual concentration after adsorption 0.01 0.1 0.002 0.002 Concentration after desorption 9.2 8.9 6.1 6.2 5 Residual concentration after adsorption 0.01 0.1 0.002 0.001 Concentration after desorption 9.3 9.2 6.2 6.2

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the present invention as defined by the following claims It can be understood that

100: metal plate 200: adsorbent layer

Claims (10)

A porous adsorbent coated electrode capable of removing volatile substances adsorbed on a porous material by a thermal regeneration method,
Metal plate; and
And an adsorbent layer formed on one surface of the metal plate and formed by coating a porous material and a conductor with a binder to a predetermined thickness,
And removing volatile substances adsorbed on the porous material by resistance heat generated by electrically connecting the adsorbent layer and the metal plate to each other
Porous adsorbent coated electrodes for the removal of volatile substances which can be thermally regenerated.
The method according to claim 1,
The adsorbent layer
A first adsorbent layer formed on at least a part of one surface of the metal plate and coated with the conductor and the binder,
And a second adsorbent layer formed on the other part of the one surface of the metal plate and coated with the porous material and the binder mixedly applied thereto
Porous adsorbent coated electrodes for the removal of volatile substances which can be thermally regenerated.
3. The method of claim 2,
The first adsorbent layer
A part of which is partially located in the second adsorbent layer region
Porous adsorbent coated electrodes for the removal of volatile substances which can be thermally regenerated.
The method of claim 3,
The first adsorbent layer
And disposed in the form of a grid in the second adsorbent layer region
Porous adsorbent coated electrodes for the removal of volatile substances which can be thermally regenerated.
A method for manufacturing a porous adsorbent coated electrode capable of removing a volatile substance adsorbed on a porous substance by a thermal regeneration method,
Preparing a metal plate, a porous material, and a conductor;
An application step of mixing the metal plate, the porous material, and the conductor together with a binder and applying the mixture to one surface of a metal plate to form an adsorbent layer;
And drying the metal plate for a predetermined period of time
A method for manufacturing a porous adsorbent coated electrode for removing volatile materials capable of thermal regeneration.
6. The method of claim 5,
The application step
The weight ratio of the porous material, the conductor, and the binder is adjusted to be 5: 1.5: 1
A method for manufacturing a porous adsorbent coated electrode for removing volatile materials capable of thermal regeneration.
6. The method of claim 5,
The application step
A first adsorbent layer application step comprising the conductor and the binder;
Applying a second adsorbent layer comprising the porous material and the binder
A method for manufacturing a porous adsorbent coated electrode for removing volatile materials capable of thermal regeneration.
8. The method of claim 7,
The application step
Applying the first adsorbent layer to at least a part of one surface of the metal plate,
And applying the second adsorbent layer to the remaining part of one surface of the metal plate
A method for manufacturing a porous adsorbent coated electrode for removing volatile materials capable of thermal regeneration.
9. The method of claim 8,
The application step
The first adsorbent layer is applied to a portion of the second adsorbent layer region
A method for manufacturing a porous adsorbent coated electrode for removing volatile materials capable of thermal regeneration.
10. The method of claim 9,
The application step
The first adsorbent layer is applied to the second adsorbent layer region so as to be arranged in a grid form
A method for manufacturing a porous adsorbent coated electrode for removing volatile materials capable of thermal regeneration.

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