CN111282410A - Device and method for degrading gaseous pollutants by electrochemical method - Google Patents
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- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
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- B01D2257/708—Volatile organic compounds V.O.C.'s
Abstract
The invention discloses a device and a method for degrading gaseous pollutants by an electrochemical method. The device for degrading gaseous pollutants by using the electrochemical method comprises an electrochemical reactor, wherein the electrochemical reactor comprises a power supply, a first electrode, a second electrode, a proton exchange membrane, a first airflow channel and a second airflow channel, the proton exchange membrane is arranged between the first electrode and the second electrode, the first electrode is arranged in the first airflow channel, the second electrode is arranged in the second airflow channel, and the first electrode and the second electrode are porous conductive adsorption material electrodes loaded with metal oxide catalysts. The technical scheme of the invention can improve the degradation rate of gaseous pollutants, effectively degrade gaseous organic pollutants with poor water solubility and quickly kill pathogenic bacteria and viruses in the air.
Description
Technical Field
The invention relates to the technical field of purification of gaseous pollutants, in particular to a device and a method for degrading gaseous pollutants by an electrochemical method.
Background
The volatile organic compound is a volatile organic compound with saturated vapor pressure of more than 133Pa and boiling point of 50-260 ℃ at room temperature, is a gaseous pollutant with strong toxicity indoors and has great harm to human bodies. At present, the degradation methods for these gaseous pollutants mainly include adsorption immobilization technology and reaction degradation technology, wherein the reaction degradation technology is widely applied because the degradation of volatile organic compounds can be realized and the adopted catalyst material can be used for a long time. In addition, the electrochemical method in the reactive degradation technology is concerned by the characteristics of compact device structure, low maintenance cost, suitability for degradation of most volatile organic compounds and the like.
The existing electrochemical method for degrading gaseous pollutants generally comprises the steps of introducing gaseous pollutants into liquid-phase electrolyte, and oxidizing and degrading the gaseous pollutants through an anode in the liquid-phase electrolyte, but the method has low degradation efficiency of degrading the gaseous pollutants and is not suitable for degrading the gaseous organic pollutants with poor water solubility by using the electrochemical method.
Disclosure of Invention
The invention mainly aims to provide a method and a device for degrading gaseous pollutants by an electrochemical method, aiming at improving the degradation rate of the gaseous pollutants and effectively degrading gaseous organic pollutants with poor water solubility.
In order to achieve the above purpose, the device for degrading gaseous pollutants by an electrochemical method provided by the invention comprises an electrochemical reactor, wherein the electrochemical reactor comprises a power supply, a first electrode, a second electrode, a proton exchange membrane, a first airflow channel and a second airflow channel, the proton exchange membrane is arranged between the first electrode and the second electrode, the first electrode is arranged in the first airflow channel, the second electrode is arranged in the second airflow channel, and the first electrode and the second electrode are porous conductive adsorption material electrodes loaded with metal oxide catalysts.
Optionally, the metal oxide catalyst is at least one of a tin oxide catalyst, a chromium oxide catalyst, a manganese oxide catalyst, a lead oxide catalyst, a molybdenum oxide catalyst, an indium oxide catalyst, and a titanium oxide catalyst.
Optionally, the carrier supporting the metal oxide catalyst is at least one of nitrogen-doped carbon, carbon nitride, activated carbon, carbon nanotubes, and graphene.
Optionally, the metal oxide catalyst is present in a loading range of 0.01% to 50%.
Optionally, the porous conductive adsorption material electrode is one of a carbon paper electrode, a carbon cloth electrode, a carbon fiber cloth electrode, a carbon particle cloth electrode and an activated carbon cloth electrode.
Optionally, the power supply is an ac power supply.
Optionally, the electrochemical reactor is provided in a plurality, and the plurality of electrochemical reactors are arranged in parallel or in series.
The invention also provides a method for degrading gaseous pollutants by an electrochemical method, which is applied to the device for degrading gaseous pollutants by the electrochemical method, and the method for degrading gaseous pollutants by the electrochemical method comprises the following steps:
and respectively introducing air containing gaseous pollutants into the first air flow channel and the second air flow channel.
Optionally, the step of introducing air containing gaseous pollutants into the first air flow channel and the second air flow channel respectively comprises:
applying 1-36V alternating voltage between the first electrode and the second electrode, wherein the frequency range of the alternating voltage is 10Hz-10000Hz, the reaction temperature range in the degradation process is controlled to be 1-95 ℃, the flow velocity range of the air containing gaseous pollutants is 0.001-10 m/s, the humidity range is 2-98%, and the volume content range of oxygen in the air containing gaseous pollutants is 5-20%.
Optionally, the ac voltage range is 3V to 5V, the reaction temperature range is 5 ℃ to 45 ℃, the flow rate of the air containing gaseous pollutants ranges from 0.2m/s to 4m/s, the relative humidity range is 20% to 95%, and the oxygen volume content range is 15% to 20%.
According to the technical scheme, the first electrode and the second electrode both adopt the porous conductive adsorption material electrodes loaded with the metal oxide catalysts, the metal oxide catalysts can oxidize water molecules adsorbed on the surfaces of the electrodes into active species such as hydroxyl radicals and the like, the active species and gaseous pollutants quickly and effectively react to realize effective degradation, the degradation efficiency is high, secondary pollutants are avoided, and meanwhile pathogenic bacteria and viruses in the air can be quickly killed. In addition, the device and the method for degrading the gaseous pollutants can effectively degrade gaseous organic pollutants with poor water solubility, can quickly kill pathogenic bacteria and viruses in the air, can efficiently degrade various types of gaseous pollutants, and have wide application range because the device does not use electrolyte.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of an apparatus for electrochemically degrading gaseous pollutants according to the present invention;
FIG. 2 is a diagram illustrating the benzene degradation rate at different applied voltages in the electrochemical method for degrading gaseous pollutants according to the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Electrochemical reactor | 30 | A first air flow passage |
| 10 | A |
40 | Second |
| 20 | |
50 | Proton exchange membrane |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a device for degrading gaseous pollutants by an electrochemical method, which is used for degrading gaseous pollutants in air, in particular volatile organic gaseous pollutants.
Referring to fig. 1, in an embodiment of the apparatus for electrochemically degrading gaseous pollutants according to the present invention, the apparatus for electrochemically degrading gaseous pollutants includes an electrochemical reactor 100, the electrochemical reactor 100 includes a power supply, a first electrode 10, a second electrode 20, a proton exchange membrane 50, a first airflow channel 30 and a second airflow channel 40, the proton exchange membrane 50 is disposed between the first electrode 10 and the second electrode 20, the first electrode 10 is disposed in the first airflow channel 30, the second electrode 20 is disposed in the second airflow channel 40, and both the first electrode 10 and the second electrode 20 are porous conductive adsorption material electrodes loaded with metal oxide catalysts.
Here, the power source is an alternating current power source, and the first electrode 10 and the second electrode 20 are both porous conductive adsorbent material electrodes supporting a metal oxide catalyst, where the metal oxide catalyst is generally supported on a carrier for coating on an electrode material to prepare an electrode. The proton exchange membrane 50 is generally a porous polyelectrolyte membrane and is disposed in the electrochemical reactor 100, the interior of the electrochemical reactor 100 is divided into a first airflow channel 30 and a second airflow channel 40, when the electrochemical reactor is assembled, the first electrode 10 is disposed in the first airflow channel 30, the second electrode 20 is disposed in the second airflow channel 40, the three layers of materials of the first electrode 10, the proton exchange membrane 50 and the second electrode 20 are clamped, and the first electrode 10 and the second electrode 20 are respectively connected to two poles of an alternating current power source through wires, so as to obtain the electrochemical reactor 100. Here, since the first electrode 10 and the second electrode 20 both contain active components of metal oxide catalysts, water molecules adsorbed on the surfaces of the electrodes can be oxidized into active species such as hydroxyl radicals, and the active species can rapidly and effectively react with gaseous pollutants, so that the gaseous pollutants can be effectively degraded, and the degradation efficiency is high.
It should be noted that, in a single voltage pulse interval of the applied ac power supply, when the first electrode 10 is in a positive voltage state of the voltage pulse, the metal oxide catalyst can oxidize water molecules adsorbed on the surface of the electrode into active species such as hydroxyl radicals, and the active species can react with gaseous pollutants in the air quickly and sufficiently, so as to achieve effective degradation of the gaseous pollutants; when the first electrode 10 is in the negative voltage state of the voltage pulse, the metal oxide is reduced to generate oxygen defects, the oxygen defects are favorable for adsorbing water in the air and activating the water, and rich raw materials are provided for active species such as hydroxyl radicals generated by positive voltage polarization in the next voltage pulse cycle interval. Further, applying an alternating current between the first electrode 10 and the second electrode 20 may suitably alternate the first electrode 10 and the second electrode 20 in a positive voltage polarization and generate reactive oxygen species to effectively degrade gaseous contaminants. Therefore, the device for degrading the gaseous pollutants by adopting the alternating current electrochemical method can realize the effect that the two electrodes simultaneously degrade the gaseous pollutants, and greatly improves the degradation efficiency of the gaseous pollutants and the utilization rate of the device space. It is within the scope of the present invention that the porous conductive adsorbent material may be a porous carbon material or other porous conductive adsorbent material.
Therefore, it can be understood that, in the technical solution of the present invention, the first electrode 10 and the second electrode 20 both adopt porous conductive adsorption material electrodes loaded with metal oxide catalysts, and the metal oxide catalysts can oxidize water molecules adsorbed on the surfaces of the electrodes into active species such as hydroxyl radicals, and the active species can rapidly and effectively react with gaseous pollutants, so as to achieve effective degradation of the gaseous pollutants, and the degradation efficiency is high. In addition, the device and the method for degrading the gaseous pollutants can effectively degrade gaseous organic pollutants with poor water solubility and can also quickly kill pathogenic bacteria and viruses in the air, namely, can efficiently degrade various types of gaseous pollutants, and have wide application range because the device and the method for degrading the gaseous pollutants do not use electrolyte.
It should be noted that the device for degrading gaseous pollutants by using an electrochemical method further includes an air flow delivery device and a pipeline, wherein the delivery pipeline is respectively communicated with the first air flow channel 30 and the second air flow channel 40, the delivery pipeline is provided with a delivery device and a control valve, the delivery device is generally a fan or an air pump, and the control valve is generally an electrical valve.
Alternatively, the metal oxide catalyst is at least one of a tin oxide catalyst, a chromium oxide catalyst, a manganese oxide catalyst, a lead oxide catalyst, a molybdenum oxide catalyst, an indium oxide catalyst, and a titanium oxide catalyst. In the preparation of the first electrode 10 and the second electrode 20, the metal oxide catalyst is selected from one or more of the above-mentioned catalysts. The metal oxide catalyst components in the first electrode 10 and the second electrode 20 may be the same or different, and are not limited herein.
Optionally, the carrier supporting the metal oxide catalyst is at least one of nitrogen-doped carbon, carbon nitride, activated carbon, carbon nanotubes, and graphene. These carriers are all porous carriers, and are all capable of sufficiently supporting the metal oxide catalyst. In the preparation of the supported metal oxide catalyst, the carrier to be used may be one or a combination of more of the above carriers.
Alternatively, in order for the metal oxide catalyst to sufficiently exert its effect, the supported metal oxide catalyst is supported in an amount ranging from 0.01% to 50%, such as 0.01%, 0.1%, 1%, 10%, 20%, 40% or 50% of the iron-containing catalyst. In order to make the metal oxide catalyst more effective and fully exert its effect, the loading is preferably 1% to 5%, such as 1%, 2%, 3%, 4% or 5%.
It should be noted that, the metal oxide is generally nano-particles, has high catalytic effect and is easy to load.
Optionally, the porous conductive adsorbent material electrode is one of a carbon paper electrode, a carbon cloth electrode, a carbon fiber cloth electrode, a carbon particle cloth electrode and an activated carbon cloth electrode.
In an embodiment of the present invention, the electrochemical reactor 100 is provided in plurality, and the plurality of electrochemical reactors 100 are provided in parallel. It can be understood that, here, a plurality of electrochemical reactors 100 are arranged in parallel, so that a plurality of electrochemical reactors 100 can be used for simultaneously degrading gaseous pollutants, and thus the treatment amount of gas per unit time can be increased, and the degradation amount can be further increased. It should be noted that two adjacent electrochemical reactors 100 may be disposed separately or in communication, and are not limited herein.
In an embodiment of the present invention, the electrochemical reactor 100 is provided in plurality, and the plurality of electrochemical reactors 100 are arranged in series. The plurality of electrochemical reactors 100 are arranged in series, so that the gas containing the pollutants sequentially passes through the plurality of electrochemical reactors 100, the complete degradation of the gaseous pollutants is finally realized, and the one-pass degradation rate of the gaseous pollutants is further improved.
Further, in a plurality of electrochemical reactors 100 connected in parallel or in series, the opposite electrodes of two adjacent electrochemical reactors 100 are located in the same gas flow channel. By the arrangement, the distance between two adjacent electrochemical reactors 100 can be relatively reduced, so that the occupied size of the whole device is relatively reduced, and the space utilization rate of the device is greatly improved.
The invention also provides a method for degrading gaseous pollutants by an electrochemical method, which is applied to the device for degrading gaseous pollutants by the electrochemical method, and comprises the following steps:
air containing gaseous contaminants is introduced into the first air flow channel 30 and the second air flow channel 40, respectively.
Here, air containing gaseous contaminants is continuously introduced into the first air flow channel 30 and the second air flow channel 40. After the gas is stabilized, the concentration of the gaseous pollutants at the gas outlets of the first gas flow channel 30 and the second gas flow channel 40 is detected by an instrument or a sensor. Of course, it is also possible to detect the concentration of gaseous pollutants in the air treated by the device.
Optionally, the step of introducing the air containing gaseous pollutants into the first air flow channel 30 and the second air flow channel 40 respectively comprises:
applying an alternating voltage of 1-36V between the first electrode 10 and the second electrode 20, wherein the frequency range of the alternating voltage is 10Hz-10000Hz, the reaction temperature range in the degradation process is controlled to be 2-95 ℃, the flow velocity range of the air containing gaseous pollutants is 0.001-10 m/s, the humidity range is 5-98%, and the volume content range of oxygen in the air containing gaseous pollutants is 5-20%.
Specifically, the alternating voltage applied between the first electrode 10 and the second electrode 20 is 1V, 5V, 15V, 22V, or 36V, and the frequency range of the alternating voltage is set to 10Hz, 50Hz, 100Hz, 500Hz, 1000Hz, or 10000 Hz. And the reaction temperature for degrading the gaseous pollutants is controlled to be 2 ℃, 5 ℃, 10 ℃, 25 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃, 90 ℃ or 95 ℃, and the reaction temperature can enable the generated active oxygen species to react with the gaseous pollutants more quickly, effectively and fully. And simultaneously controlling the flow rate of the air containing the gaseous pollutants to be 0.001m/s, 0.01m/s, 0.1m/s, 1m/s, 5m/s or 10m/s, the relative humidity to be 5%, 15%, 30%, 45%, 60%, 75% or 98%, and the volume content of oxygen in the air containing the gaseous pollutants to be 5%, 10%, 15% or 20%. Therefore, the gaseous pollutants can be effectively, quickly and sufficiently degraded, and the degradation efficiency is improved.
Optionally, the ac voltage range is 3V-5V, such as 3V, 4V or 5V; the reaction temperature ranges from 5 ℃ to 45 ℃, for example, the reaction temperature is 5 ℃, 15 ℃, 25 ℃, 35 ℃ or 45 ℃; the flow rate of the air containing gaseous pollutants is in the range of 0.2m/s to 4m/s, such as 0.2m/s, 1m/s, 2m/s, 3m/s or 4 m/s; the oxygen content by volume ranges from 15% to 20%, such as 15V%, 17V%, 18V% or 20V%. Therefore, the gaseous pollutants can be more effectively, quickly and fully degraded, and the degradation efficiency is improved.
It will be appreciated that the efficiency of degradation of gaseous contaminants can be optimised by adjusting the ac voltage, ac frequency, reaction temperature, relative humidity, air flow rate and oxygen content.
The method for electrochemically degrading gaseous pollutants and the device thereof according to the present invention are described in detail by specific examples below.
Example 1
(1) Preparation of the first electrode: 1g of carbon black was ultrasonically dispersed in 100ml of an ethanol solvent, 0.05g of tin dichloroacetylacetonate was added, the ultrasonic dispersion was continued for 2 hours, and then the dispersion was stirred at room temperature for 20 hours, followed by centrifugal separation of the carbon black and drying at 50 ℃. Then calcining the material for 1 hour at 450 ℃ in the air atmosphere to obtain the catalyst which takes carbon black as a carrier and loads tin oxide nano particles, namely the loaded tin oxide catalyst. And ultrasonically dispersing 10mg of the prepared supported tin oxide catalyst into 5mL of mixed solution of perfluorosulfonic acid-polytetrafluoroethylene copolymer and isopropanol, and spraying the dispersed solution onto the surface of a carbon cloth electrode with the thickness of 16 square centimeters to prepare the first electrode.
(2) Preparation of the second electrode: the second electrode was prepared according to the method described above for the first electrode, i.e. the second electrode was also a carbon cloth electrode supporting a tin oxide catalyst.
(3) Assembling the electrochemical reactor: and (2) placing the first electrode prepared in the step (1) in a first airflow channel in a reactor, placing the second electrode prepared in the step (2) in a second airflow channel, placing a proton exchange membrane (adopting a porous polyelectrolyte membrane) between the first electrode and the second electrode, clamping the first electrode, the proton exchange membrane and the second electrode, and simultaneously respectively connecting the first electrode and the second electrode with two poles of an alternating current power supply through leads to obtain the electrochemical reactor.
(4) A method for degrading gaseous pollutants using the electrochemical reactor of step (3), comprising the steps of: respectively introducing gaseous pollutants containing water vapor and oxygen into the second gas flow channel and the second gas flow channel, wherein the flow rate of the gas is 20 mL/min-1The relative humidity of the gas is 50%, the volume content of oxygen in the gas is 20%, the concentration of gaseous pollutant benzene is 10ppm, alternating voltages of 3.2V, 3.4V, 3.6V, 3.8V and 4.0V are respectively applied between the first electrode and the second electrode, the frequency is 50Hz, and the temperature in the reaction process is controlled to be 20 ℃. And detecting the concentration of the pollutants at the gas outlet in the stable reaction by using gas chromatographySee figure 2 for catalytic performance.
As can be seen from fig. 2, the electrochemical reactor of this embodiment can effectively degrade benzene and can achieve the effect of the first electrode and the second electrode on the simultaneous degradation of benzene under different voltages, and the degradation effect of the first electrode on benzene is not much different from the degradation efficiency of the second electrode on benzene.
Example 2
(1) Preparation of the first electrode: ultrasonically dispersing 1g of carbon nano tube in an isopropanol solution containing 10mmol/L of bis (acetylacetone) diisopropyl titanate, taking out after 2 hours, drying the dispersion liquid at 50 ℃ under vacuum, and then putting the dispersion liquid into a tubular furnace for high-temperature treatment at 400 ℃ under Ar gas condition to obtain a catalyst which takes carbon black as a carrier and is loaded with titanium oxide nano particles, namely the loaded titanium oxide catalyst. And ultrasonically dispersing 10mg of the prepared supported titanium oxide catalyst into 5mL of mixed solution of perfluorosulfonic acid-polytetrafluoroethylene copolymer and isopropanol, and then spraying the dispersed solution onto the surface of a carbon cloth electrode with the square centimeter of 16 to prepare the first electrode.
(2) Preparation of the second electrode: the second electrode was prepared according to the method described above for the first electrode, i.e. the second electrode was also a carbon cloth electrode supporting a titanium oxide catalyst.
(3) Assembling the electrochemical reactor: and (2) placing the first electrode prepared in the step (1) in a first airflow channel in a reactor, placing the second electrode prepared in the step (2) in a second airflow channel, placing a proton exchange membrane (adopting a porous polyelectrolyte membrane) between the first electrode and the second electrode, clamping the first electrode, the proton exchange membrane and the second electrode, and simultaneously respectively connecting the first electrode and the second electrode with two poles of an alternating current power supply through leads to obtain the electrochemical reactor.
(4) A method for degrading gaseous pollutants using the electrochemical reactor of step (3), comprising the steps of: respectively introducing gaseous pollutants containing water vapor and oxygen into the first air flow channel and the second air flow channel, wherein the flow rate of the gas is 40 mL/min-1Humidity of 70%, oxygen content of 20% by volume, concentration of gaseous pollutant tolueneThe temperature was 10ppm, an alternating voltage of 3.8V was applied between the first electrode and the second electrode, respectively, the frequency was 100Hz, and the temperature during the reaction was controlled at 20 ℃. And detecting the concentration of the pollutants at the gas outlet during the stable reaction by using gas chromatography.
After detection, the degradation efficiency of toluene in the first airflow channel where the first electrode is located is 90%, and the degradation efficiency of toluene in the second airflow channel where the second electrode is located is 91%. Therefore, the electrochemical reactor can effectively degrade the toluene, and the first electrode and the second electrode have little difference in toluene degradation efficiency and are relatively high.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. The device for degrading gaseous pollutants by using the electrochemical method is characterized by comprising an electrochemical reactor, wherein the electrochemical reactor comprises a power supply, a first electrode, a second electrode, a proton exchange membrane, a first airflow channel and a second airflow channel, the proton exchange membrane is arranged between the first electrode and the second electrode, the first electrode is arranged in the first airflow channel, the second electrode is arranged in the second airflow channel, and the first electrode and the second electrode are both porous conductive adsorption material electrodes loaded with metal oxide catalysts.
2. The apparatus for electrochemically degrading gaseous pollutants of claim 1, wherein the metal oxide catalyst is at least one of a tin oxide catalyst, a chromium oxide catalyst, a manganese oxide catalyst, a lead oxide catalyst, a molybdenum oxide catalyst, an indium oxide catalyst, and a titanium oxide catalyst.
3. The apparatus for electrochemically degrading gaseous pollutants according to claim 1, wherein the carrier supporting the metal oxide catalyst is at least one of nitrogen-doped carbon, carbon nitride, activated carbon, carbon nanotubes, and graphene.
4. The apparatus for electrochemically degrading gaseous pollutants of claim 1, wherein the metal oxide catalyst is present in an amount ranging from 0.01% to 50%.
5. The apparatus for electrochemically degrading gaseous pollutants according to claim 1, wherein the porous conductive adsorbent material electrode is one of a carbon paper electrode, a carbon cloth electrode, a carbon fiber cloth electrode, a carbon particle cloth electrode and an activated carbon cloth electrode.
6. The apparatus for electrochemically degrading gaseous pollutants according to any one of claims 1 to 5, wherein the power source is an alternating current power source.
7. The apparatus for electrochemically degrading gaseous pollutants according to claim 6, wherein a plurality of electrochemical reactors are provided, and a plurality of the electrochemical reactors are arranged in parallel or in series.
8. A method for electrochemically degrading gaseous pollutants, which is applied to the device for electrochemically degrading gaseous pollutants according to any one of claims 1 to 7, and comprises the following steps:
and respectively introducing air containing gaseous pollutants into the first air flow channel and the second air flow channel.
9. The method of electrochemically degrading gaseous pollutants of claim 8, wherein the step of introducing air containing gaseous pollutants into the first air flow channel and the second air flow channel, respectively, comprises:
applying 1-36V alternating voltage between the first electrode and the second electrode, wherein the frequency range of the alternating voltage is 10Hz-10000Hz, the reaction temperature range in the degradation process is controlled to be 1-95 ℃, the flow velocity range of air containing gaseous pollutants is 0.001-10 m/s, the relative humidity range is 2-98%, and the volume content range of oxygen in the air containing gaseous pollutants is 5-20%.
10. The method for electrochemically degrading gaseous pollutants according to claim 9, wherein the alternating voltage is in the range of 3V to 5V, the reaction temperature is in the range of 5 ℃ to 45 ℃, the flow rate of the gaseous pollutant-containing air is in the range of 0.2m/s to 4m/s, the relative humidity is in the range of 20% to 98%, and the oxygen content by volume is in the range of 5% to 20%.
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| CN202010103321.XA CN111282410B (en) | 2020-02-19 | 2020-02-19 | Device and method for degrading gaseous pollutants by electrochemical method |
| PCT/CN2020/079034 WO2021164073A1 (en) | 2020-02-19 | 2020-03-12 | Device and method for degrading gaseous pollutants by using electrochemical method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112807995A (en) * | 2021-01-28 | 2021-05-18 | 深圳市普瑞美泰环保科技有限公司 | Device and method for degrading gaseous pollutants by electrochemical method |
| CN112870931A (en) * | 2021-01-11 | 2021-06-01 | 深圳市普瑞美泰环保科技有限公司 | Device and method for degrading gaseous organic pollutants by electrochemical method |
| CN113019082A (en) * | 2021-01-11 | 2021-06-25 | 东莞市普锐美泰环保科技有限公司 | Device and method for degrading gaseous organic pollutants by electrochemical method |
| CN113477075A (en) * | 2021-06-10 | 2021-10-08 | 深圳市普瑞美泰环保科技有限公司 | Electrochemical air purifying and sterilizing device and electrochemical air purifying and sterilizing method |
| CN114198850A (en) * | 2021-12-15 | 2022-03-18 | 中国科学院生态环境研究中心 | Gas-solid phase electro-catalysis electrode and preparation method and application thereof |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2029437C (en) * | 1989-11-08 | 1994-01-04 | Takashi Ooe | Apparatus for treating waste gas |
| CN1219139A (en) * | 1996-05-20 | 1999-06-09 | 迪奈克斯公司 | Method and reactor for electrochemical conversion of material e. g. soot particles being insoluble in fluid |
| US20020103409A1 (en) * | 2000-11-16 | 2002-08-01 | Akira Kuriyama | Method and apparatus for decomposing pollutant |
| WO2004041425A1 (en) * | 2002-11-05 | 2004-05-21 | Hydro-Quebec | Electrical heating reactor for gas phase reforming |
| CN1562795A (en) * | 2004-04-07 | 2005-01-12 | 太原理工大学 | Photoelectrocatalysis and oxidation device for treating organic substance in water |
| CN1585853A (en) * | 2002-03-13 | 2005-02-23 | 盖佩拉科斯南 | Process and synthesizer for molecular engineering and synthesis of materials |
| CN101913693A (en) * | 2010-09-21 | 2010-12-15 | 浙江工商大学 | Device and method for activating molecular oxygen by electrocatalysis to treat persistent organic wastewater |
| CN102335550A (en) * | 2011-08-02 | 2012-02-01 | 浙江工商大学 | Reactor for filtering PAHs (polycyclic aromatic hydrocarbons) in composite electrocatalytic oxidation treatment |
| CN102863110A (en) * | 2012-10-23 | 2013-01-09 | 河海大学 | Device and method for integrally treating refractory organic wastewater |
| CN103987878A (en) * | 2011-10-12 | 2014-08-13 | 阿海珐 | Method for generating hydrogen and oxygen by steam electrolysis |
| CN104230067A (en) * | 2013-06-08 | 2014-12-24 | 中国科学院理化技术研究所 | Processing apparatus and method for wastewater containing organic pollutants |
| CN106732238A (en) * | 2016-11-09 | 2017-05-31 | 中国科学院生态环境研究中心 | The method of reactor and its elimination VOCs for gas-solid phase electrocatalytic reaction |
| CN108083395A (en) * | 2017-12-17 | 2018-05-29 | 南京理工大学 | Tubular pole-dielectric impedance low-temperature plasma coupling combined apparatus |
| CN108147507A (en) * | 2016-12-06 | 2018-06-12 | 中国科学院生态环境研究中心 | A kind of cathode carbon material activation persulfate of supported cobaltosic oxide strengthens the method for photoelectric catalysis degrading organic |
| CN207811438U (en) * | 2017-12-08 | 2018-09-04 | 碳氢技术工程管理（武汉）有限公司 | A kind of active oxygen sewage-treatment plant |
| CN110585916A (en) * | 2019-09-30 | 2019-12-20 | 华中师范大学 | Method and device for removing gaseous pollutants through electro-Fenton catalytic oxidation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110559853B (en) * | 2019-09-30 | 2020-11-10 | 华中师范大学 | Method and device for removing gaseous pollutants by anode and cathode synchronous electrochemical method |
-
2020
- 2020-02-19 CN CN202010103321.XA patent/CN111282410B/en active Active
- 2020-03-12 WO PCT/CN2020/079034 patent/WO2021164073A1/en active Application Filing
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2029437C (en) * | 1989-11-08 | 1994-01-04 | Takashi Ooe | Apparatus for treating waste gas |
| CN1219139A (en) * | 1996-05-20 | 1999-06-09 | 迪奈克斯公司 | Method and reactor for electrochemical conversion of material e. g. soot particles being insoluble in fluid |
| US20020103409A1 (en) * | 2000-11-16 | 2002-08-01 | Akira Kuriyama | Method and apparatus for decomposing pollutant |
| CN1585853A (en) * | 2002-03-13 | 2005-02-23 | 盖佩拉科斯南 | Process and synthesizer for molecular engineering and synthesis of materials |
| WO2004041425A1 (en) * | 2002-11-05 | 2004-05-21 | Hydro-Quebec | Electrical heating reactor for gas phase reforming |
| CN1562795A (en) * | 2004-04-07 | 2005-01-12 | 太原理工大学 | Photoelectrocatalysis and oxidation device for treating organic substance in water |
| CN101913693A (en) * | 2010-09-21 | 2010-12-15 | 浙江工商大学 | Device and method for activating molecular oxygen by electrocatalysis to treat persistent organic wastewater |
| CN102335550A (en) * | 2011-08-02 | 2012-02-01 | 浙江工商大学 | Reactor for filtering PAHs (polycyclic aromatic hydrocarbons) in composite electrocatalytic oxidation treatment |
| CN103987878A (en) * | 2011-10-12 | 2014-08-13 | 阿海珐 | Method for generating hydrogen and oxygen by steam electrolysis |
| CN102863110A (en) * | 2012-10-23 | 2013-01-09 | 河海大学 | Device and method for integrally treating refractory organic wastewater |
| CN104230067A (en) * | 2013-06-08 | 2014-12-24 | 中国科学院理化技术研究所 | Processing apparatus and method for wastewater containing organic pollutants |
| CN106732238A (en) * | 2016-11-09 | 2017-05-31 | 中国科学院生态环境研究中心 | The method of reactor and its elimination VOCs for gas-solid phase electrocatalytic reaction |
| CN108147507A (en) * | 2016-12-06 | 2018-06-12 | 中国科学院生态环境研究中心 | A kind of cathode carbon material activation persulfate of supported cobaltosic oxide strengthens the method for photoelectric catalysis degrading organic |
| CN207811438U (en) * | 2017-12-08 | 2018-09-04 | 碳氢技术工程管理（武汉）有限公司 | A kind of active oxygen sewage-treatment plant |
| CN108083395A (en) * | 2017-12-17 | 2018-05-29 | 南京理工大学 | Tubular pole-dielectric impedance low-temperature plasma coupling combined apparatus |
| CN110585916A (en) * | 2019-09-30 | 2019-12-20 | 华中师范大学 | Method and device for removing gaseous pollutants through electro-Fenton catalytic oxidation |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112870931A (en) * | 2021-01-11 | 2021-06-01 | 深圳市普瑞美泰环保科技有限公司 | Device and method for degrading gaseous organic pollutants by electrochemical method |
| CN113019082A (en) * | 2021-01-11 | 2021-06-25 | 东莞市普锐美泰环保科技有限公司 | Device and method for degrading gaseous organic pollutants by electrochemical method |
| WO2022148169A1 (en) * | 2021-01-11 | 2022-07-14 | 深圳市普瑞美泰环保科技有限公司 | Apparatus for degrading gaseous organic pollutants by electrochemical process, and method therefor |
| WO2022148170A1 (en) * | 2021-01-11 | 2022-07-14 | 深圳市普瑞美泰环保科技有限公司 | Apparatus and method for degrading gaseous organic pollutant by means of electrochemical method |
| CN113019082B (en) * | 2021-01-11 | 2022-10-04 | 深圳市普瑞美泰环保科技有限公司 | Device and method for degrading gaseous organic pollutants by electrochemical method |
| CN112807995A (en) * | 2021-01-28 | 2021-05-18 | 深圳市普瑞美泰环保科技有限公司 | Device and method for degrading gaseous pollutants by electrochemical method |
| CN113477075A (en) * | 2021-06-10 | 2021-10-08 | 深圳市普瑞美泰环保科技有限公司 | Electrochemical air purifying and sterilizing device and electrochemical air purifying and sterilizing method |
| WO2022257160A1 (en) * | 2021-06-10 | 2022-12-15 | 深圳市普瑞美泰环保科技有限公司 | Electrochemical air purification and disinfection apparatus, and electrochemical air purification and disinfection method |
| CN114198850A (en) * | 2021-12-15 | 2022-03-18 | 中国科学院生态环境研究中心 | Gas-solid phase electro-catalysis electrode and preparation method and application thereof |
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| CN111282410B (en) | 2021-07-06 |
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