WO2021062908A1

WO2021062908A1 - Method and device for removing gaseous pollutant by means of electro-fenton catalytic oxidation

Info

Publication number: WO2021062908A1
Application number: PCT/CN2019/113912
Authority: WO
Inventors: 张礼知; 艾智慧; 贾法龙; 严义清; 严方升; 李普煊
Original assignee: 华中师范大学; 深圳市普瑞美泰环保科技有限公司
Priority date: 2019-09-30
Filing date: 2019-10-29
Publication date: 2021-04-08
Also published as: CN110585916A; CN110585916B

Abstract

A device and method for removing a gaseous pollutant by means of electro-Fenton catalytic oxidation. The device comprises an electrochemical reactor (100); the electrochemical reactor (100) comprises a power source, an anode (10), a cathode (20), a proton exchange membrane (50), an anode airflow channel (30), and a cathode airflow channel (40); the proton exchange membrane (50) is provided between the anode (10) and the cathode (20); the anode (10) is provided in the anode airflow channel (30); the cathode (20) is provided in the cathode airflow channel (40); the cathode (20) is a porous conductive adsorbent material electrode for loading a transition metal catalyst. The method comprises the following steps: introducing air containing the gaseous pollutant into the cathode airflow channel (40), introducing water or air containing water vapor into the anode airflow channel (30), and applying a direct current voltage of 0.5V-36V between the anode (10) and the cathode (20).

Description

Method and device for removing gaseous pollutants by electro-Fenton catalytic oxidation To

Related application

This application requires: the priority of the Chinese patent application filed on September 30, 2019, with application number 201910948066.6, titled "Method and device for removing gaseous pollutants by electro-Fenton catalytic oxidation", which is hereby introduced as reference.

Technical field

The application relates to the technical field of gaseous pollutants, and in particular to a method and device for removing gaseous pollutants by electro-Fenton catalytic oxidation.

Background technique

The gaseous pollutants in the air mainly come from human activities (industrial production, coal burning, motor vehicle exhaust, etc.) and natural process emissions. They are toxic, carcinogenic and malodorous. At the same time, they are produced by photochemical reactions to produce secondary aerosols and ozone. One of the important precursors. At present, the methods for removing gaseous pollutants mainly include physical adsorption, ozone oxidation, photocatalysis, thermal catalytic oxidation, and plasma methods. However, these removal methods generally have problems such as high energy consumption, potential safety hazards, and secondary pollution. The scope of application restricted.

Summary of the invention

The main purpose of this application is to provide a method and device for removing gaseous pollutants by electro-Fenton catalytic oxidation, which aims to effectively remove gaseous pollutants and has a wide range of applications.

In order to achieve the above objectives, the device for removing gaseous pollutants proposed in this application includes an electrochemical reactor, which includes a power source, an anode, a cathode, a proton exchange membrane, an anode gas flow channel, and a cathode gas flow channel. The exchange membrane is arranged between the anode and the cathode, the anode is arranged in the anode air flow channel, the cathode is arranged in the cathode air flow channel, and the cathode is a porous conductive supporting electro Fenton catalyst Adsorption material electrode.

Optionally, the active component of the electro-Fenton catalyst is at least one of iron, cobalt, nickel, manganese, and cerium oxides, hydroxides, and alloys thereof.

Optionally, the active component of the electro-Fenton catalyst is at least one of a complex of polyphosphoric acid and iron ions, lithium iron phosphate, and a metal organic framework material.

Optionally, the porous conductive adsorption material electrode is one of activated carbon fiber, graphene, carbon nanotube, and nitrogen-doped graphene.

Optionally, the loading range of the electro Fenton catalyst is 0.1%-50%.

Optionally, the anode is at least one of a graphite electrode, a metal electrode, a metal alloy electrode, and a metal oxide electrode.

Optionally, the metal electrode is at least one of a tin electrode, a chromium electrode, a nickel electrode, a manganese electrode, a ruthenium electrode, an iridium electrode, an iron electrode, a rhodium electrode, a palladium electrode, a platinum electrode, a lead electrode, and a tantalum electrode.

Optionally, there are multiple electrochemical reactors, and multiple electrochemical reactors are arranged in parallel or in series.

Optionally, a plurality of the electrochemical reactors are provided, and a plurality of the electrochemical reactors are arranged in parallel, and the opposite electrodes of the two adjacent electrochemical reactors are located in the same air flow channel, and are located in the same air flow channel The two electrodes have the same polarity; and/or, the electrochemical reactor is provided with a plurality of the electrochemical reactors are arranged in series, and the opposite electrodes of the two adjacent electrochemical reactors are located in the same gas flow The two electrodes in the channel and located in the same air flow channel have the same polarity.

This application also proposes a method for removing gaseous pollutants, which is applied to the device for removing gaseous pollutants as described above, and the method for removing gaseous pollutants includes the following steps:

Pass air containing gaseous pollutants into the cathode airflow channel, pass water or air containing water vapor into the anode airflow channel, and apply a DC voltage of 0.5V-36V between the anode and the cathode;

After a preset time, the concentration of gaseous pollutants at the outlet of the cathode gas flow channel is monitored respectively.

In the technical solution of the present application, since the cathode adopts a porous conductive adsorption material electrode loaded with an electric Fenton catalyst, oxygen can be reduced to hydrogen peroxide. The hydrogen peroxide reacts with the catalyst to generate active species such as hydroxyl radicals and hydroxyl radicals through the Fenton reaction. Active species react with gaseous pollutants to achieve their effective removal. In addition, the electro-Fenton catalyst has higher activity and better stability, which helps to improve the removal rate of pollutants. In addition, the catalyst can efficiently catalyze and decompose a variety of gaseous pollutants, and has a wide range of applications.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on the structure shown in these drawings.

Fig. 1 is a schematic structural diagram of an embodiment of a device for removing gaseous pollutants according to the present application;

2 is a schematic structural diagram of another embodiment of the device for removing gaseous pollutants according to the present application;

FIG. 3 is a schematic diagram of the degradation rate of benzene pollutants under different voltages in the method for removing gaseous pollutants in this application;

FIG. 4 is a schematic diagram of the degradation rate of benzene pollutants at a voltage of 2.2V in the method for removing gaseous pollutants according to the present application, as a function of electrolysis time;

Figure 5 shows the degradation rate of benzene with different carbon material electrodes as the cathode matrix under 2.3V voltage;

Figure 6 shows the total flow rate at which benzene degradation rate reaches 90% at 2.3V voltage with different carbon material electrodes as the cathode matrix;

Figure 7 shows the degradation rate of benzene pollutants with different electric Fenton catalysts as cathodes at a voltage of 2.2V;

Figure 8 shows the degradation rate of benzene pollutants with different electric Fenton catalysts as cathodes at a voltage of 2.2V;

Figure 9 shows the degradation rate of benzene pollutants for different anode materials at a voltage of 2.2V;

Figure 10 shows the applied voltage when the degradation rate of different gaseous pollutants reaches 95%.

Attached icon number description:

Label	name	Label	name
100	Electrochemical reactor	30	Anode gas flow channel
10	anode	40	Cathode airflow channel
20	cathode	50	Proton exchange membrane

The realization, functional characteristics, and advantages of the purpose of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Is not within the scope of protection required by this application.

This application proposes a device for removing gaseous pollutants, which is used to remove gaseous pollutants.

Referring to FIG. 1, in an embodiment of the device for removing gaseous pollutants of the present application, the device for removing gaseous pollutants includes an electrochemical reactor 100. The electrochemical reactor 100 includes a power supply, an anode 10, a cathode 20, and a proton exchange membrane 50. , The anode air flow channel 30 and the cathode air flow channel 40, the proton exchange membrane 50 is arranged between the anode 10 and the cathode 20, the anode 10 is arranged in the anode air flow channel 30, the cathode 20 is arranged in the cathode air flow channel 40, and the cathode 20 is the load power Porous conductive adsorption material electrode of Fenton catalyst.

The power supply here is a DC power supply, the cathode 20 uses a carbon material electrode loaded with an electric Fenton catalyst, a proton exchange membrane 50 is placed between the cathode 20 and the anode 10, and the three layers of materials of the anode 10, the proton exchange membrane 50 and the cathode 20 are clamped , And the surface of the anode 10 is provided with an anode air flow channel 30, and the surface of the cathode 20 is provided with a cathode air channel 40, while the anode 10 and the cathode 20 are respectively connected to the positive and negative electrodes of the DC power supply through wires to obtain gaseous pollutant removal Device. Since the cathode 20 adopts the active components of the supported electric Fenton catalyst, the gaseous pollutants can be fully electrically Fentonized, that is, under the action of direct current, the oxygen is electrochemically reduced on the cathode 20 to generate hydrogen peroxide, and the hydrogen peroxide is further combined with the load. The Fenton catalyst on the surface of the cathode 20 generates hydroxyl radical active species, which then oxidize and remove the gaseous pollutants, and kill pathogenic bacteria and inactivate viruses. The carbon material electrode is used here. The carbon material has a relatively high specific surface area. During the gas phase electro-Fenton reaction, it can effectively adsorb pollutants on its surface and oxidize and degrade; the carbon material has good physical and chemical properties, which can be used in electrochemical reactions. relatively stable.

It should be noted that the porous conductive adsorbent material may be a porous carbon material or other porous conductive adsorbent materials, all of which fall within the protection scope of the present application.

Therefore, it is understandable that the technical solution of the present application, because the cathode 20 adopts a carbon material electrode supporting an electric Fenton catalyst, it can reduce oxygen to hydrogen peroxide, and the hydrogen peroxide and the iron-containing catalyst generate hydroxyl radicals through the Fenton reaction. Active species such as hydroxyl radicals and other reactive species react with gaseous pollutants to achieve effective removal. In addition, the electro-Fenton catalyst has higher activity and better stability, which helps to improve the removal rate of pollutants. In addition, the catalyst can efficiently catalyze and decompose a variety of gaseous pollutants, and has a wide range of applications.

It should be noted that the device for removing gaseous pollutants also includes transportation equipment and transportation pipelines. The transportation pipeline communicates with the anode air flow channel 30, and the transportation pipeline communicates with the cathode air flow channel 40. The transportation pipelines are equipped with transportation equipment and transportation equipment. It is a fan, air pump, or water pump.

Optionally, the active component of the electro-Fenton catalyst is at least one of iron, cobalt, nickel, manganese, and cerium oxides, hydroxides, and alloys thereof. Iron, cobalt, nickel, manganese, and cerium oxides, hydroxides and their alloys can all be used as active components of the electro-Fenton catalyst, and one or more of them can be used in combination.

Optionally, the active component of the electro-Fenton catalyst is at least one of a complex of polyphosphoric acid and iron ions, lithium iron phosphate, and a metal organic framework material. Complexes of polyphosphoric acid and iron ions, lithium iron phosphate and metal organic framework materials can also be used as Fenton catalysts, and one or more of them can also be used in combination.

Optionally, the porous conductive adsorption material electrode is one of activated carbon fiber, graphene, carbon nanotube, and nitrogen-doped graphene. When preparing the cathode 20, one of these materials can be selected for the porous conductive adsorbent electrode.

Optionally, the loading range of the electro-Fenton catalyst is 0.1%-50%. For example, the loading of electro-Fenton catalyst is 0.1%, 1%, 10%, 20%, 40% or 50%. Optionally, the load is 1%-5%, such as 1%, 2%, 3%, 4%, or 5%.

Optionally, the anode 10 is at least one of a graphite electrode, a metal electrode, a metal alloy electrode, and a metal oxide electrode.

Optionally, the metal electrode is at least one of a tin electrode, a chromium electrode, a nickel electrode, a manganese electrode, a ruthenium electrode, an iridium electrode, an iron electrode, a rhodium electrode, a palladium electrode, a platinum electrode, a lead electrode, and a tantalum electrode. One or more combinations of the metal electrodes can be selected.

It is understandable that the metal alloys can be alloys of tin, chromium, nickel, manganese, ruthenium, iridium, iron, rhodium, palladium, platinum, lead, and tantalum, and the metal oxides can also be oxides of these metals.

In an embodiment of the present application, multiple electrochemical reactors 100 are provided, and multiple electrochemical reactors 100 are provided in parallel. It is understandable that multiple electrochemical reactors 100 are arranged in parallel here, and two adjacent electrochemical reactors 100 are arranged separately, so that multiple electrochemical reactors 100 can be used to degrade gaseous pollutants at the same time. Increase the gas processing volume per unit time and improve its removal efficiency. It should be noted that the polarities of the opposite electrodes of the two adjacent electrochemical reactors 100 can be the same or opposite, which is not limited here. That is, the opposite electrodes of two adjacent electrochemical reactors 100 can be the same as the cathode 20 and the same as the anode 10, or one is the cathode 20 and the other is the anode 10.

In an embodiment of the present application, multiple electrochemical reactors 100 are provided, and multiple electrochemical reactors 100 are provided in series. The multiple electrochemical reactors 100 are arranged in series, so that the air containing pollutants passes through the multiple electrochemical reactors 100 in sequence, and finally the pollutants are completely removed. Similarly, the polarities of the opposite electrodes of two adjacent electrochemical reactors 100 can be the same or opposite, which is not limited here.

Referring to FIG. 2, in an embodiment of the present application, multiple electrochemical reactors 100 are provided, and multiple electrochemical reactors 100 are provided in parallel, and the opposite electrodes of two adjacent electrochemical reactors 100 are located in the same gas flow channel The two electrodes located in the same air flow channel have the same polarity. Such an arrangement can relatively reduce the distance between two adjacent electrochemical reactors 100, thereby relatively reducing the occupied size of the overall device, and greatly improving the space utilization rate of the device.

In an embodiment of the present application, a plurality of electrochemical reactors 100 are provided, and a plurality of the electrochemical reactors 100 are arranged in series, and the opposite electrodes of two adjacent electrochemical reactors 100 are located in the same gas flow channel , And the two electrodes located in the same air flow channel have the same polarity. Similarly, such an arrangement can also relatively reduce the occupied size of the overall device, and greatly improve the space utilization of the device.

Pass air containing gaseous pollutants into the cathode airflow channel 40, pass water or air containing water vapor into the anode airflow channel 30, and apply a direct current of 0.5V-36V between the anode 10 and the cathode 20 Voltage.

Here, the DC voltage range is preferably 2V-5V, for example, the applied voltage is 2V, 3V, 4V or 5V. By adjusting the DC voltage and gas flow rate, the gaseous pollutants are fully electro-Fenton oxidized, so that the removal efficiency of the gaseous pollutants is optimized. The water is electrolyzed at the anode 10 to generate oxygen, which is released into the air and can be recycled to the cathode 20 area for use, so that the recycling of resources can be realized.

It should be noted that the air containing gaseous pollutants is continuously passed into the anode airflow channel 30 and the cathode airflow channel 40 here. After the gas is stabilized, an instrument is used to detect the concentration of gaseous pollutants at the gas outlets of the anode gas flow channel 30 and the cathode gas flow channel 40. Of course, it can also be used to detect the pollution of gaseous pollutants in the air treated by the device.

The method and device for removing gaseous pollutants of the present application will be described in detail below through specific embodiments.

Example 1

(1) Preparation of the cathode: ultrasonically disperse 10 mg of iron oxide catalyst into 5 mL of a mixture of perfluorosulfonic acid-polytetrafluoroethylene copolymer (Nafion) and isopropanol, and then spray the dispersion onto a 16 cm² carbon An electric Fenton-loaded air diffusion electrode is prepared on the surface of the paper.

(2) Assembly of electrochemical reactor: use the cathode and graphite electrode prepared in step (1) as anode and proton exchange membrane (such as Nafion 115) Clamping, an anode air flow channel is provided on the surface of the anode, and a cathode air flow channel is provided on the surface of the cathode. At the same time, the anode and the cathode are respectively connected to the anode and the cathode of the DC power supply through wires to obtain an electrochemical reactor.

(3) The method for removing gaseous pollutants using the electrochemical reaction device of step (2) includes the following steps: passing benzene-containing gas into the cathode airflow channel, the concentration of organic pollutant benzene is 10ppm, and air is used as the balance gas. The total flow rate is 20mL/min. The water is continuously introduced into the anode gas flow channel through the water pump, and the flow rate is 10 mL/min. Then apply a DC voltage between the cathode and the anode, and monitor the concentration of benzene pollutants at the outlet of the cathode airflow channel when it is stable. The catalytic performance is shown in Figures 3 and 4.

It can be seen from Figure 3 that as the electrolysis voltage increases, the degradation rate of benzene presents an increasing trend. And when the voltage of 2.1V, 2.2V or 2.3V is applied, the degradation rate of benzene is higher. At the same time, it was tested that under the condition of an applied voltage of 2.2V, the degradation rate of benzene was observed as a function of electrolysis time. The specific results are shown in Figure 4. It can be seen from the figure that under the condition of an applied voltage of 2.8V, the degradation rate of benzene remained stable.

Example 2

Different porous conductive adsorption material electrodes are used as cathodes to carry out the experiment of removing benzene pollutants. Among them, the iron-containing catalyst in the cathode uses iron oxide catalyst, and the porous conductive adsorption material electrode uses activated carbon fiber, carbon nanotubes, graphene and nitrogen-doped graphene. , The specific operation is: ultrasonically disperse 10mg of iron oxide catalyst to 5mL In the mixture of Nafion and isopropanol, the dispersion was sprayed on the surface of 16 square centimeters of activated carbon fibers, carbon nanotubes, graphene, and nitrogen-doped graphene to prepare different cathodes. Using the graphite rod as the anode, different electrochemical reactors were assembled using the same method as in Example 1, and each electrochemical reactor was used for testing. The specific operation is: passing the gas containing benzene into the gas flow channel near the surface of the cathode , The concentration of organic pollutant benzene is 10ppm, air is used as the balance gas, and the total flow rate is controlled to 20mL/min. The water pump is continuously introduced into the channel close to the anode surface with a flow rate of 10 mL/min. Then apply a 2.3V DC voltage between the cathode and the anode, and monitor the concentration of benzene pollutants at the outlet of the cathode airflow channel when it is stable. The catalytic performance is shown in Figures 5 and 6.

It can be seen from Figure 5 that using different porous conductive adsorption material electrodes as the cathode matrix, under a certain DC voltage, the degradation rate of benzene is different. Among them, when graphene and nitrogen-doped graphene are used as the porous conductive adsorption material electrodes, benzene contamination The degradation rate of the material is relatively high. At the same time, it can be seen from Figure 6 that when nitrogen-doped graphene is used as the electrode of the porous conductive adsorption material, the total flow rate at which the benzene degradation rate reaches 90% when a voltage of 2.3V is applied is large, which can be obtained by using graphene and nitrogen. Doped graphene as a porous conductive adsorption material electrode can remove benzene pollutants more efficiently.

Example 3

Different electro-Fenton catalysts were used to remove benzene pollutants. Among them, the electro-Fenton catalyst used iron oxide catalyst, ferroferric oxide catalyst, nickel oxide catalyst, cobalt tetroxide catalyst, manganese dioxide catalyst, ceria catalyst and Nickel iron hydroxide catalyst, nickel iron hydroxide catalyst, chromium oxide catalyst, iron hydroxide catalyst, sodium tetrapolyphosphate, iron sulfate, sodium tripolyphosphate and iron chloride. The carbon material electrode uses activated carbon fiber. The specific operations are as follows: Ultrasonic dispersion of 10mg iron oxide, ferroferric oxide, nickel oxide, cobalt tetroxide, manganese dioxide, cerium oxide and iron hydroxide catalyst to 5mL In the mixture of Nafion and isopropanol, the dispersion is sprayed on the surface of 16 square centimeters of activated carbon fibers to prepare different electric Fenton-loaded air diffusion electrodes, that is, different cathodes. Using the graphite rod as the anode, different electrochemical reactors were assembled using the same method as in Example 1, and each electrochemical reactor was used for testing. The specific operation is: passing the gas containing benzene into the gas flow channel near the surface of the cathode , The concentration of organic pollutant benzene is 10ppm, air is used as the balance gas, and the total flow rate is controlled to 20mL/min. The water pump is continuously introduced into the channel close to the anode surface with a flow rate of 10 mL/min. Then apply a DC voltage of 2.2V between the cathode and the anode, and monitor the concentration of benzene pollutants at the outlet of the cathode airflow channel when it is stable. The catalytic performance is shown in Figures 7 and 8.

It can be seen from Figure 7 and Figure 8 that the degradation rate of benzene pollutants is different under a certain voltage when different electro-Fenton catalysts are used. Among them, iron oxide, cobalt tetroxide, sodium tetrapolyphosphate and iron sulfate are used as electro-Fenton catalysts. The degradation rate is greater than 90%.

Example 4

Different anode materials are used to test the removal of benzene pollutants. Among them, the anode material can be tin, lead, ruthenium, rhodium, palladium, iridium, platinum, ruthenium-iridium alloy, ruthenium oxide or iridium oxide, and its cathode material, electrochemical reactor The method of assembling and the method of removing benzene contaminants can be referred to the operation of embodiment 1, which will not be repeated here. Finally, monitor the concentration of benzene pollutants at the outlet of the cathode airflow channel when it is stable, and the catalytic performance is shown in Figure 9.

It can be seen from Figure 9 that different anode materials have different degradation rates of benzene under the same voltage. Among them, when ruthenium, ruthenium-iridium alloy, and ruthenium oxide are used as anode materials, the degradation rate of benzene is higher. Efficiently remove benzene pollutants.

Example 5

The electrochemical reactor in Example 1 was used for benzene, toluene, m/p-xylene, o-xylene, 1,2,4-trimethylbenzene, styrene, ethylene, propylene, 1,3- The removal test of butadiene, formaldehyde, and acetaldehyde pollutants is carried out. The specific operation can refer to the operation in Example 1. Different DC voltages are applied between the cathode and the anode, and the benzene pollutants at the outlet of the cathode airflow channel are monitored when they are stable. Concentration, record the voltage when the pollutant degradation rate is greater than 95%, and the catalytic performance is shown in Figure 10.

It can be seen from Figure 10 that when the degradation rate of ethylene pollutants is greater than 95%, the voltage is relatively low, and when the degradation rate of benzene, o-xylene, styrene, and formaldehyde is greater than 95%, the voltage is relatively high.

The above are only preferred embodiments of this application, and do not limit the scope of this application. Any equivalent structural transformation made using the content of the specification of this application under the inventive concept of this application, or directly/indirectly applied to other related The technical fields of are included in the scope of patent protection of this application.

Claims

A device for removing gaseous pollutants by electro-Fenton catalytic oxidation, wherein the device for removing gaseous pollutants includes an electrochemical reactor, and the electrochemical reactor includes a power source, an anode, a cathode, a proton exchange membrane, and an anode gas flow channel And a cathode air flow channel, the proton exchange membrane is arranged between the anode and the cathode, the anode is arranged in the anode air flow channel, the cathode is arranged in the cathode air flow channel, and the cathode is Porous conductive adsorption material electrode supporting transition metal catalyst.
The electro-Fenton catalytic oxidation device for removing gaseous pollutants according to claim 1, wherein the active components of the transition metal catalyst are iron, cobalt, nickel, manganese, and cerium oxides, hydroxides and alloys thereof. At least one.
The electro-Fenton catalytic oxidation device for removing gaseous pollutants according to claim 1, wherein the active component of the transition metal catalyst is a complex of polyphosphoric acid and iron ions, lithium iron phosphate and metal organic framework materials. At least one of.
7. The electro-Fenton catalytic oxidation device for removing gaseous pollutants according to claim 1, wherein the porous adsorption conductive material electrode is at least one of activated carbon fiber, graphene, carbon nanotube, and nitrogen-doped graphene.
The device for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 1, wherein the loading amount of the transition metal catalyst ranges from 0.1% to 50%.
The device for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 1, wherein the anode is at least one of a graphite electrode, a metal electrode, a metal alloy electrode, and a metal oxide electrode.
The electro-Fenton catalytic oxidation device for removing gaseous pollutants according to claim 1, wherein the metal electrode is a tin electrode, a chromium electrode, a nickel electrode, a manganese electrode, a ruthenium electrode, an iridium electrode, an iron electrode, a rhodium electrode, At least one of a palladium electrode, a platinum electrode, a lead electrode, and a tantalum electrode.
The device for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 1, wherein there are a plurality of electrochemical reactors, and a plurality of electrochemical reactors are arranged in parallel or in series.
The device for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 1, wherein a plurality of said electrochemical reactors are arranged, and a plurality of said electrochemical reactors are arranged in parallel, and two adjacent electrochemical reactors are arranged in parallel. The opposite electrodes of the chemical reactor are located in the same gas flow channel, and the two electrodes located in the same gas flow channel have the same polarity.
The device for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 1, wherein a plurality of said electrochemical reactors are arranged, and a plurality of said electrochemical reactors are arranged in series, and two adjacent electrochemical reactors are arranged in series. The opposite electrodes of the chemical reactor are located in the same gas flow channel, and the two electrodes located in the same gas flow channel have the same polarity.
A method for removing gaseous pollutants by electro-Fenton catalytic oxidation is applied to a device for removing gaseous pollutants, wherein the device for removing gaseous pollutants includes an electrochemical reactor, and the electrochemical reactor includes a power supply, an anode, A cathode, a proton exchange membrane, an anode gas flow channel and a cathode gas flow channel, the proton exchange membrane is arranged between the anode and the cathode, the anode is arranged in the anode gas flow channel, and the cathode is arranged in the In the cathode airflow channel, the cathode is a porous conductive adsorbent electrode supporting a transition metal catalyst;

The method for removing gaseous pollutants includes the following steps:

The air containing gaseous pollutants is passed into the cathode air flow channel, the water or air containing water vapor is passed into the anode air flow channel, and a DC voltage of 0.5V-36V is applied between the anode and the cathode.
The method for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 11, wherein the active components of the transition metal catalyst are iron, cobalt, nickel, manganese and cerium oxides, hydroxides and alloys thereof. At least one.
The method for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 11, wherein the active component of the transition metal catalyst is a complex of polyphosphoric acid and iron ions, lithium iron phosphate and metal organic framework materials. At least one of.
The method for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 11, wherein the porous adsorption conductive material electrode is at least one of activated carbon fiber, graphene, carbon nanotube, and nitrogen-doped graphene.
The method for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 11, wherein the loading amount of the transition metal catalyst ranges from 0.1% to 50%.
The method for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 11, wherein the anode is at least one of a graphite electrode, a metal electrode, a metal alloy electrode, and a metal oxide electrode.
The method for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 11, wherein the metal electrode is a tin electrode, a chromium electrode, a nickel electrode, a manganese electrode, a ruthenium electrode, an iridium electrode, an iron electrode, a rhodium electrode, At least one of a palladium electrode, a platinum electrode, a lead electrode, and a tantalum electrode.
The method for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 11, wherein a plurality of said electrochemical reactors are provided, and a plurality of said electrochemical reactors are provided in parallel or in series.
The method for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 11, wherein a plurality of said electrochemical reactors are arranged, and a plurality of said electrochemical reactors are arranged in parallel, and two adjacent electrochemical reactors are arranged in parallel. The opposite electrodes of the chemical reactor are located in the same gas flow channel, and the two electrodes located in the same gas flow channel have the same polarity.
The method for removing gaseous pollutants by electro-Fenton catalytic oxidation according to claim 11, wherein a plurality of said electrochemical reactors are arranged, and a plurality of said electrochemical reactors are arranged in series, and two adjacent electrochemical reactors are arranged in series. The opposite electrodes of the chemical reactor are located in the same gas flow channel, and the two electrodes located in the same gas flow channel have the same polarity. To