JP3971492B2 - Desorption / regeneration method using non-thermal plasma - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an exhaust gas treatment method using an adsorbent, and more particularly to an exhaust gas treatment technique that can effectively desorb the exhaust gas adsorbed on the adsorbent using nonthermal plasma.
[0002]
[Prior art]
In general, waste gas, volatile organic compounds, bad odors, NOx (nitrogen oxides), SOx generated from various industries such as food manufacturing, chemical industry, machinery, agriculture, automobiles, restaurants, households, etc. (1) Combustion method, (2) Catalyst method, (3) Adsorption method, etc. are known as exhaust gas treatment methods for detoxifying (sulfur oxide), toxic gases, etc. (hereinafter collectively referred to as exhaust gas). It has been.
[0003]
The (1) combustion method is one that is the simplest in principle, in which exhaust gas is heated to a high temperature and harmful components contained in the exhaust gas are thermally decomposed or burned to make them harmless. In addition, (2) the catalyst system is a method that uses a catalyst to accelerate the reaction rate of a chemical reaction that changes a specific harmful chemical component contained in exhaust gas into a relatively harmless chemical component. is there. The catalyst used in this system is generally mounted on a combustion engine vehicle or the like because the amount of catalyst is relatively small without the catalyst itself being chemically changed or consumed by the reaction. It is used. The (3) adsorption method is a method of removing harmful components in exhaust gas by taking them into the material of the adsorbent, and adsorbents in which various adsorbent materials are formed in a predetermined shape have been proposed.
[0004]
In particular, it is known that the (3) adsorption method is also effective for removing harmful components in exhaust gas that cannot be specified as compounds and for removing malodors in exhaust gas.
[0005]
(3) As an adsorbent used in the adsorption method, for example, activated carbon, activated alumina, molecular sieve, silica gel, and the like are widely used. Some of these adsorbents can be used only once, and others can be reused by performing a regeneration process.
[0006]
[Problems to be solved by the invention]
However, the following problems have arisen in the exhaust gas treatment method as described above.
[0007]
That is, (1) in the combustion system, in order to sufficiently detoxify the exhaust gas, a large amount of combustion energy is required, which is not economical. In particular, since the concentration of harmful components contained in the exhaust gas is often relatively low, there is a tendency to consume more energy necessary for decomposing the low concentration harmful components.
[0008]
In addition, in (2) the catalyst system, the catalyst may be poisoned, and it has been difficult to ensure sufficient reliability.
[0009]
That is, poisoning refers to the action of a catalyst poison, which is a substance that significantly reduces or completely eliminates the catalytic action in the reaction of the catalyst, and in principle, must be exposed to an exhaust gas flow (2). In the catalyst system, it is impossible to avoid the danger of the catalyst coming into contact with the catalyst poison contained in the exhaust gas stream and poisoning. Since the chemical component that reacts with the catalyst poison is a unique component, the above problem can be avoided if the temperature environment can be optimized for the catalytic reaction using a catalyst corresponding to the processing component. However, for example, the optimum temperature for an effective catalytic reaction is 300 ° C. or higher, and there are few cases where an effective catalytic reaction is exhibited at room temperature. For this reason, as a method for treating exhaust gas containing various components under various environmental conditions as actual conditions, there is a problem that the catalytic reaction lacks flexibility and reactivity and is not suitable.
[0010]
(3) In the adsorption method, in order to reuse the adsorbent, a process for separating the gas component adsorbed from the adsorbent, a process for detoxifying the exhaust gas separated from the adsorbent, A separate process to regenerate the material so that it can be adsorbed again is necessary, the reuse process is complicated, and the equipment used for the reuse process and the energy used for the reuse process are required. There was a problem that the cost increased. In particular, in the reuse process, since the high-temperature gas uses low-pressure steam or the like, the device needs to be sealed, and the cost of the device itself is high.
[0011]
Therefore, in view of the problems of the prior art, the present invention provides a method for applying a non-thermal plasma in a method for desorption / regeneration from an adsorbent, so that an additional apparatus is not required, It is an object of the present invention to provide a desorption / regeneration method using non-thermal plasma that can be processed at normal pressure and can reduce running costs.
[0012]
[Means for Solving the Problems]
The present invention includes a step of adsorbing exhaust gas to an adsorbent,
Applying non-thermal plasma to the adsorbent adsorbing the exhaust gas, desorbing the exhaust gas adsorbed on the adsorbent by ionized gas, and regenerating the adsorbent;
A flaming ignition step for igniting the exhaust gas desorbed from the adsorbent, and
The application process of the non-thermal plasma is to generate ionized gas under normal temperature and normal pressure by generating plasma by 1 Hz to 1000 Hz AC power supply or pulse discharge,
This is a desorption / regeneration method using non-thermal plasma in which the desorbed exhaust gas is decomposed by ignition.
[0015]
Thus, in the processing of exhaust gas by the exhaust gas having a higher Engineering for applying a non-thermal plasma to the adsorbent adsorbed, the adsorbed on the adsorbent exhaust gas effectively by the generation of nonthermal plasma Desorbed from the adsorbent (hereinafter also referred to as “desorption”) . Further, according to the present invention, the adsorbent from which the exhaust gas has been desorbed by the action of non-thermal plasma is regenerated so that the exhaust gas can be adsorbed again without requiring a special regeneration process. Further, since the exhaust gas desorbed from the adsorbent is released into the plasma zone where non-thermal plasma is generated, there is an advantage that the exhaust gas is also decomposed.
[0016]
Further, decomposition desorbed gas is, for example, when a flammable material such as a 1% concentration or more volatile organic compounds, by providing a more flammable誘炎Engineering prompting a flash of the exhaust gas, the combustion of the exhaust gas itself And the desorbed exhaust gas can be efficiently decomposed, and as a result, the running cost can be reduced.
[0017]
Further, as a more Engineering for applying a non-thermal plasma, by AC power 1Hz～1000Hz, or by using the pulse discharge method, the conventional complicated process or apparatus such as a vacuum condition is required as Non-thermal plasma can be generated using an apparatus with a relatively simple process or a simple structure, and the exhaust gas that changes depending on the environmental conditions can be desorbed from the adsorbent under optimum conditions. .
[0018]
Thus, according to the present invention, the exhaust gas adsorbed on the adsorbent can be efficiently desorbed from the adsorbent by applying non-thermal plasma to the adsorbent, and the exhaust gas is desorbed from the adsorbent. Thus, the adsorbent can also be regenerated. Therefore, it is possible to efficiently desorb the exhaust gas components, regenerate the adsorbent, and decompose the desorbed exhaust gas in a single reactor without the need to provide a separate device in the exhaust gas treatment process as in the past. The size of the entire apparatus can be limited, and the running cost can be reduced by minimizing the required energy.
[0019]
In addition, according to the present invention, only the exhaust gas adsorption process can be performed in a separate process, and the desorption of the desorbed exhaust gas can be provided as a separate process. It is possible to cope with it, and versatility can be improved.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Specific examples according to the present invention will be described below with reference to FIGS.
[0021]
First, a reactor configuration, which is an apparatus for realizing the exhaust gas treatment of this example, is shown in FIG. 1, and a schematic configuration diagram of an experimental apparatus is shown in FIG. 2, and the exhaust gas treatment method of this example is described based on these drawings. To do.
[0022]
The reactor 3 of this example is a coaxial plasma reactor type in which a container is filled with pellets of gamma alumina (porous alumina) as an adsorbent, and a voltage set to a predetermined value is applied to a wire-shaped central electrode 38. It is a device that generates non-thermal plasma at room temperature and normal pressure by applying a frequency AC current.
[0023]
The current applied to the reactor 3 is not limited to an AC power source , and may be a pulse waveform current or a triangular wave current as will be described later.
[0024]
As shown in FIG. 1, the reactor 3 includes a reactor main body 31 that is a sealed container, in which a gamma alumina pellet-shaped adsorbent 32 is housed, and a wire-shaped central electrode disposed in the center of the reactor main body 31. 38 and a plasma electrode composed of a mesh screen-like external electrode 39 provided on the outer periphery of the reactor 31 is provided.
[0025]
The reactor body 31 is formed in a straight tube having a diameter of about 20 cm using a Pyrex material, and upper and lower openings are closed by bushes 331 and 332 using a silicon material.
[0026]
In addition, pipe connection holes 33 and 34 are respectively provided on the upper side and the lower side of the reactor main body 31, and the upper connection hole 33 is connected to the gas supply pipe 35 of the experimental apparatus, and the lower side. The connection hole 34 is connected to a gas exhaust pipe 36 of the experimental apparatus.
[0027]
The adsorbent 32 is filled so as to be positioned between connection holes 33 and 34 provided above and below the reactor main body 31. That is, a disk 37 having a hole is disposed above the lower connection hole 34 of the reactor main body 31 using a material such as non-conductive polytetrafluoroethylene (DuPont registered trademark “ Teflon ” ). The disc-shaped adsorbent 32 is held in the reactor main body 31 by the disc 37, and the gas can pass through the disc 37.
[0028]
A central electrode 38 installed in the reactor main body 31 constituting the plasma electrode and an external electrode 39 provided on the outer periphery of the reactor main body 31 are each electrically connected to the power supply unit.
[0029]
That is, a stainless steel wire having a diameter of 3 mm is used for the central electrode 38, and the lower end of the central electrode 38 is connected to the center of a disk 37 provided in the reactor body 31, and the upper end thereof is The center of the bush 331 that closes the upper opening of the reactor main body 31 is passed through and electrically connected to the power supply unit.
[0030]
Further, the external electrode 39 is formed in a copper mesh screen shape, is configured to cover the outer periphery of the reactor main body 31, and is electrically connected to the power supply unit 5 similarly to the central electrode 38.
[0031]
Therefore, when an AC power source of 60 Hz, for example, is applied from the power supply unit 5 to the central electrode 38, the non-adsorbent 32 having a relatively low dielectric constant located between the central electrode 38 and the external electrode 39 is non- Thermal plasma (ionized gas) can be generated. The AC current applied to the plasma electrode is not limited to 60 Hz described above, and may be set at 1 Hz to 1000 Hz depending on conditions.
[0032]
Thus, by generating non-thermal plasma between the adsorbents 32, the exhaust gas adsorbed on the adsorbents 32 can be desorbed. Moreover, by desorbing the exhaust gas from the adsorbent 32, the adsorbent 32 can be regenerated so that the exhaust gas can be adsorbed again.
[0033]
The mechanism of desorption by discharge is complicated, and the detailed mechanism has not been elucidated at present. However, for example, by applying a voltage to the central electrode 38, a large number of free electrons are emitted, and these electrons are contained in the gas. It is considered that O ₂ and N ₂ are ionized, and further, the exhaust gas adsorbed by the adsorbent is simultaneously excited and ionized and released into the space radically and ionically. Further, as in this example, when a material having a relatively low dielectric constant (gamma alumina in this example) is used for the adsorbent 32, the desorbed exhaust gas is decomposed so that the exhaust gas can be effectively treated. . That is, regarding the decomposition of the desorbed exhaust gas, the gas molecules ionized by electrons and the exhaust gas become highly reactive intermediates (radicals), which are dissociated and decomposed by radical reaction / ion reaction. It is thought that this radical reacts in a chain and effectively promotes the decomposition reaction.
[0034]
Next, the experimental apparatus 1 using the reactor 3 configured as described above will be described.
[0035]
As shown in FIG. 2, this experimental apparatus 1 includes a gas generation supply unit 2 that generates a sample gas of a predetermined component, a reactor 3 that includes the adsorbent 32 described above, and a gas that flows into and out of the reactor 3. The measuring unit 4 for measuring the concentration and concentration of the gas and the power source unit 5 for supplying electric power to the plasma electrode of the reactor 3.
[0036]
The gas generation and supply unit 2 includes a compressor 21 driven by a conductive motor, an air tank 22 having a predetermined capacity for stabilizing the air pressure generated by the compressor 21, an automatic adjustment valve 23 for adjusting the air flow rate to be constant, an air Two control valves 26 which are provided on a piping path leading to an air dryer 25 for removing moisture contained therein and on a piping path bypassing the sample gas generator 25 to adjust the concentration of the sample gas and the overall flow rate; 27.
[0037]
In the experimental apparatus 1, the sample gas generator 25 is filled with a solution of a sample of a required component in a container of a predetermined volume, and disposed so that an air supply port is positioned in the solution. An air outlet is positioned on the solution surface. Therefore, the sample component is sufficiently contained in the passing air when the air passes through the solution.
[0038]
The gas supply pipe connected to the sample gas generator 25 is provided with a flow rate control valve 26, and a similar flow rate control valve 27 is also provided on a pipe path that bypasses the sample gas generator 25. Yes. Therefore, the ratio of the gas generated by the sample gas generator 25 and the air flowing therethrough can be changed by adjusting the throttle opening degree of the flow control valves 26 and 27, and the flow rate and components of the sample gas supplied to the reactor 3 can be changed. The concentration can be arbitrarily set.
[0039]
The measurement unit 4 includes a VOC (Volatile Organic Compound) measuring device 41 and a NOx (nitrogen compound) measuring device 42 in which sensors are provided in the gas supply pipe 35 and the gas discharge pipe 36 of the reactor 3. Each of these measuring devices is connected to a recording device (not shown) so that changes with time during the experiment can be recorded.
[0040]
The power supply unit 5 includes an external power supply 51, a transformer 52 that converts electric power from the external power supply 51 into an arbitrary voltage and current, and a current and voltage type 53 that measures and monitors the supply current and voltage. ing.
[0041]
Next, the result of the first experiment performed using the experimental apparatus 1 will be described with reference to the drawings.
[0042]
The main items of the experiment are shown below.
[0043]
Plasma reactor: packed bed barrier discharge type pellet: gamma alumina beads with a diameter of 3.2 mm (1/8 inch), 79 ml reactor diameter: 20 mm reactor effective length: 260 mm center electrode: stainless steel wire with a diameter of 3 mm External electrode: reactor Copper mesh screen adsorption process exhaust gas covering the outer periphery: Volatile organic compound (MEK: methyl ethyl ketone) concentration in dry air 580 ppm Gas flow rate: 2 L / min Adsorption time: 270 minutes Desorption / regeneration / decomposition process Applied voltage: 22.5 kV MEK (methyl ethyl ketone), which is relatively difficult to decompose, was used as a sample gas for the experiment, and the MEK concentration flowing through the reactor was set to 580 ppm.
[0044]
Then, this sample gas was supplied to the reactor at a flow rate of 2 L / min for 270 minutes.
[0045]
When the MEK concentration is measured on the reactor outlet side after supplying the sample gas, the MEK concentration becomes almost zero, and it can be confirmed that the MEK component as the sample gas is adsorbed on the adsorbent in the reactor with high efficiency.
[0046]
Next, the supply of the sample gas is stopped, and a voltage of 22.5 kV is applied between the plasma electrodes of the reactor 3 while supplying air at the same flow rate as the flow rate at which the sample gas was supplied. Generated.
[0047]
As described above, by applying a voltage between the plasma electrodes, the exhaust gas is desorbed from the adsorbent, the adsorbent is regenerated, and the desorbed exhaust gas is decomposed.
[0048]
FIG. 3 is a graph showing the relationship between MEK concentration and time measured on the inlet side and outlet side of the reactor.
[0049]
That is, in FIG. 3, after the MEK is adsorbed to the adsorbent by the adsorption operation for 270 minutes, the supply of MEK is stopped, and then the plasma electrode is supplied with electric power having the same flow rate as the MEK supply flow rate. Desorption is started while flowing, and the MEK concentration state is shown until the desorption operation is completed.
[0050]
In Figure 3, the integral value A indicated by oblique lines rising lower right indicates the MEK amount adsorbed by the adsorbent, the integral value B shown by oblique lines rising on the right shows the MEK amount desorbed from the adsorbent. The difference between the integral value A and the integral value B indicates the decomposition rate of the desorbed exhaust gas. That is, when the exhaust gas desorbed from the adsorbent is not decomposed at all, the integral value A and the integral value B are the same value, and when the desorbed exhaust gas is decomposed 100%, the integral value B is zero.
[0051]
In FIG. 3, since the integral value B is smaller than the integral value A, it can be confirmed that the desorbed MEK is decomposed.
[0052]
Further, as shown in FIG. 3, it was confirmed from this experiment that the adsorbent was desorbed in a time shorter than the adsorption time.
[0053]
Note that the desorption rate of the adsorbent can be optimized by combining and setting the residence time of the gas component, the voltage applied to the plasma electrode, and the dielectric constant of the adsorbent appropriately.
[0054]
In this experiment, gamma alumina with a porous material and a relatively low dielectric constant is used as the adsorbent, and non-thermal plasma is generated in the adsorbent with a relatively simple structure, so that the exhaust gas is desorbed from the adsorbent. At the same time, the desorbed exhaust gas can be decomposed, and the exhaust gas treatment process can be simplified.
[0055]
Moreover, according to this example, the adsorbent regeneration process can be performed together with the desorption process for desorbing the exhaust gas from the adsorbent. For this reason, it is not necessary to perform the regeneration process of an adsorbent using another process, and the apparatus, the place, etc. for it can be simplified.
[0056]
Next, the result of a second experiment performed using the experimental apparatus 1 will be described with reference to the drawings.
[0057]
The main items of the experiment are shown below.
[0058]
Plasma reactor: packed bed barrier discharge type pellet: gamma alumina beads with a diameter of 3.2 mm (1/8 inch), 20 ml reactor diameter: 20 mm reactor effective length: 60 mm center electrode: stainless steel wire with a diameter of 3 mm External electrode: reactor Copper mesh screen adsorption process exhaust gas covering the outer periphery: Volatile organic compound (MEK: methyl ethyl ketone) concentration in dry air 680 ppm Gas flow rate: 2 L / min Adsorption time: 50 minutes Desorption / regeneration / decomposition process Applied voltage: 22.5 kV 4 is a graph showing the relationship between MEK concentration and time measured on the inlet side and outlet side of the reactor.
[0059]
That is, according to FIG. 4, after the MEK is adsorbed to the adsorbent by the adsorption operation for 50 minutes, the supply of MEK is stopped, and the plasma is supplied while flowing the air at the same flow rate (2 L / min) as the MEK supply flow rate. Power is supplied to the electrode to generate non-thermal plasma, and desorption is started. After the desorption operation is completed (50 minutes to 40 minutes / 90 minutes), MEK having the same concentration and flow rate as the MEK is supplied again. Adsorption operation is performed for 50 minutes (90 minutes to 140 minutes). Thereafter, the flow of MEK and air is temporarily stopped, non-thermal plasma is generated while the voltage is applied, and desorption and decomposition are continued (140 minutes to 40 minutes for 180 minutes). When the exhaust gas is desorbed / decomposed while passing the air, MEK that has already been desorbed while the flow rate was stopped is added, and desorption of MEK having a higher concentration is observed.
[0060]
As shown in FIG. 4, the gas decomposition of about 65% is obtained from the ratio of the amount of MEK (integrated value for 50 minutes) and the amount of MEK desorbed (the integrated value for 40 minutes thereafter) when the adsorption operation is performed for 50 minutes. It can be confirmed that the desorbed MEK is efficiently decomposed.
[0061]
In FIG. 4, when MEK is adsorbed for 50 minutes, non-thermal plasma is generated and desorption operation is performed for about 40 minutes, and then MEK is adsorbed to the adsorbent again, the amount of MEK is about the same as the initial adsorption amount. Was adsorbed on the adsorbent (integrated value for 50 minutes from 90 minutes to 140 minutes), and it was confirmed that the adsorbent was regenerated.
[0062]
Thus, in this experiment, a volatile organic compound, which is one of exhaust gas components, is adsorbed using an adsorbent having a relatively low dielectric constant, and non-thermal plasma is generated on the adsorbent at normal temperature and pressure. As a result, the exhaust gas can be effectively desorbed from the adsorbent, and the adsorbent can be regenerated, and the exhaust gas desorbed from the adsorbent can be decomposed by non-thermal plasma, thereby efficiently performing the exhaust gas treatment. I was able to confirm that it was possible.
[0063]
Further, the adsorption process of MEK concentration of 680 ppm and 50 minutes carried out in this experiment is 10 to 20 times the concentration in the actual practical environment, and 500 to 1,000 minutes in the normal environment. It corresponds to an adsorption process and is a particularly effective means for decomposing VOCs at low concentrations. In addition, by using the present invention even under high concentration conditions, the exhaust gas treatment process of desorption, regeneration, and decomposition can be performed efficiently at normal temperature and pressure, greatly simplifying the exhaust gas treatment process and saving power Can be realized.
[0064]
Note that a flammable substance such as a volatile organic compound desorbed from the adsorbent ignites inductively when the concentration reaches 1% or more, and self-decomposition is promoted. For this reason, since the desorbed exhaust gas is naturally self-decomposed by providing a flaming-flaming means such as a pilot lamp that promotes the ignition of the exhaust gas desorbed from the adsorbent after the desorption process, further power consumption As compared with the conventional exhaust gas treatment process, the power consumption can be easily reduced to 1/10 to 1/100.
[0065]
In this experiment, MEK contained in the exhaust gas was used as a sample. However, the desorption / regeneration method and apparatus using non-thermal plasma according to the present invention are exhaust gas containing other components such as NOx and toxic gas. Generally, it can be used.
[0066]
In this experiment, non-thermal plasma was generated by using the packed-barrier discharge method. For example, a waveform having a large dV / dt (voltage fluctuation rate) and regularly fluctuating, that is, a square wave (Square A non-thermal plasma can be generated using a power source using a wave form) or other pulse discharge methods, and an appropriate exhaust gas treatment can be performed according to the use conditions.
[0067]
Further, in this example, an experimental example was shown in which the exhaust gas adsorption / desorption / decomposition and adsorbent regeneration were performed using the same apparatus.For example, after performing only adsorption, desorption was performed in a separate process and separate apparatus. After that, it is also possible to perform an operation of decomposing the exhaust gas desorbed in a separate process and a separate device, and it is possible to perform an optimal exhaust gas treatment according to the use environment.
[0068]
【The invention's effect】
As described above, the present invention applies non-thermal plasma to an adsorbent on which exhaust gas is adsorbed, and the desorption of the exhaust gas adsorbed on the adsorbent, regeneration of the adsorbent, and desorption by the generation of the non-thermal plasma. This is a method for decomposing the exhaust gas.
[0069]
As described above, in the treatment of the exhaust gas, the process of applying the non-thermal plasma to the adsorbent on which the exhaust gas is adsorbed allows the exhaust gas adsorbed on the adsorbent to be effectively adsorbed by the generation of the non-thermal plasma. Desorbed from the material. Further, according to the present invention, the adsorbent from which the exhaust gas has been desorbed by the action of non-thermal plasma is regenerated so that the exhaust gas can be adsorbed again without requiring a special regeneration process. Further, since the exhaust gas desorbed from the adsorbent is released into the plasma zone where non-thermal plasma is generated, there is an advantage that the exhaust gas is also decomposed.
[0070]
In addition, when the desorbed exhaust gas is a flammable substance such as a volatile organic compound having a concentration of 1% or more, for example, by providing a flaming flaming means for igniting the exhaust gas, the exhaust gas itself is decomposed by combustion. It is possible to efficiently promote and decompose the desorbed exhaust gas, and as a result, it is possible to reduce the running cost.
[0071]
In addition, as a process or means for applying non-thermal plasma, a complicated process or apparatus that requires a vacuum condition as in the past by using a 1 Hz to 1000 Hz AC power source or a pulse discharge method is used. Non-thermal plasma can be generated using an apparatus having a relatively simple process or a simple structure without the necessity, and the exhaust gas that changes depending on the environmental conditions or the like can be desorbed from the adsorbent under optimum conditions.
[0072]
Thus, according to the present invention, the exhaust gas adsorbed on the adsorbent can be efficiently desorbed from the adsorbent by applying non-thermal plasma to the adsorbent, and the exhaust gas is desorbed from the adsorbent. Thus, the adsorbent can also be regenerated. Therefore, it is possible to efficiently desorb the exhaust gas components, regenerate the adsorbent, and decompose the desorbed exhaust gas in a single reactor without the need to provide a separate device in the exhaust gas treatment process as in the past. The size of the entire apparatus can be limited, and the running cost can be reduced by minimizing the required energy.
[0073]
In addition, according to the present invention, only the exhaust gas adsorption process can be performed in a separate process, and the desorption of the desorbed exhaust gas can be provided as a separate process. It is possible to cope with it, and versatility can be improved.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view illustrating a schematic configuration of a packed-layer barrier discharge type plasma reactor used in this experiment according to a specific example of the present invention.
FIG. 2 is a schematic configuration diagram illustrating an entire configuration of an experimental apparatus using the reactor illustrated in FIG. 1 according to a specific example of the present invention.
3 is a diagram showing a relationship between time measured using the experimental apparatus shown in FIG. 2 and MEK (sample gas) concentration according to a specific example of the present invention.
4 is a diagram showing a relationship between time measured using the experimental apparatus shown in FIG. 2 and MEK (sample gas) concentration according to another specific example of the present invention.
[Explanation of symbols]
1 experimental apparatus 2 gas generation and supply unit 3 reactance capacitor <br/> 4 measuring section 5 Power unit 21 compressor 22 air tank 23 automatic control valve 24 Air dryer 25 Sample gas generator 26 the flow control valve 27 the flow control valve 31 reactor main body 32 Adsorbent 33 Pipe connection hole 34 Pipe connection hole 35 Gas supply pipe 36 Gas discharge pipe 37 Disc 38 Central electrode 39 External electrode 41 VOC measuring instrument 42 NOx measuring instrument 51 External power supply 52 Transformer 53 Current and voltmeter 331 Bush 332 Bush A integral value B integral value

Claims (1)

A step of adsorbing exhaust gas to an adsorbent;
Applying non-thermal plasma to the adsorbent adsorbing the exhaust gas, desorbing the exhaust gas adsorbed on the adsorbent by ionized gas, and regenerating the adsorbent;
A flaming ignition step for igniting the exhaust gas desorbed from the adsorbent, and
The application process of the non-thermal plasma is to generate ionized gas under normal temperature and normal pressure by generating plasma by 1 Hz to 1000 Hz AC power supply or pulse discharge,
A desorption / regeneration method using non-thermal plasma, wherein decomposition is performed by ignition of the desorbed exhaust gas.

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