CN116078156A - Air purifying device - Google Patents

Abstract

The invention relates to an air purification device, comprising: a plasma generating cavity, which has an air inlet for passing in air to be purified and an air outlet for exhausting purified air; a first electrode is arranged on the plasma Inside the generating chamber; the second electrode is arranged outside the plasma generating chamber, and a voltage can be applied between the second electrode and the first electrode, so as to generate plasma in the plasma generating chamber; and ozonolysis catalyst particles are filled in the plasma generation cavity. The air purifying device can reduce residual ozone and improve purifying performance.

Description

air purification device

technical field

The invention relates to the technical field of air purification, in particular to an air purification device.

Background technique

TVOC (Total Volatile Organic Compounds, total volatile organic compounds), is one of the important indicators to measure the degree of indoor air pollution. Because TVOC is extremely harmful to human health, people pay more and more attention to the treatment technology of TVOC.

Among the current TVOC treatment technologies, low-temperature plasma technology is a safe and efficient air purification treatment technology that can effectively improve air quality. Low-temperature plasma technology uses the plasma including high-energy electrons and strong oxidizing active groups generated during the discharge process to interact with TVOC gas molecules, so that TVOC gas is degraded into CO ₂ and H ₂ O by redox and other harmless products to achieve the purpose of removing TVOC. It has the characteristics of strong purification ability and continuous elimination of odor.

However, there are still some problems in the use of low-temperature plasma technology for air purification: for example, in the process of generating plasma by gas discharge, it is often accompanied by the generation of a large number of by-products—ozone. The long-term exposure of the human body to ozone will cause adverse reactions such as headache, dry throat and mucous membrane damage, causing irreversible damage to human health. The current air purification device is difficult to effectively solve the problem of residual ozone, so the purification performance needs to be improved.

Contents of the invention

Based on this, it is necessary to provide an air purification device capable of reducing residual ozone and improving purification performance.

The present invention is achieved through the following technical solutions.

The invention provides an air purification device, comprising:

The plasma generation chamber has an air inlet for the air to be purified and an air outlet for the purified air to be discharged;

The first electrode is arranged in the plasma generation chamber;

The second electrode is arranged outside the plasma generation chamber, and a voltage can be applied between the second electrode and the first electrode, so that plasma is generated in the plasma generation chamber; and

Ozone decomposition catalyst particles are filled in the plasma generation cavity.

The above-mentioned air purification device, when working, enters the air to be purified from the air inlet, and applies a voltage between the second electrode and the first electrode, so that the gas in the plasma generation chamber undergoes a discharge reaction to generate plasma, and these plasmas include But not limited to high-energy electrons and strong oxidative active groups, so these plasmas can interact with TVOC gas molecules in the air to be purified, so that TVOC gas molecules are oxidized and reduced to harmless products such as CO ₂ and H ₂ O , to achieve effective removal of TVOC. In addition, a large amount of by-product ozone simultaneously generated during the process of gas discharge to generate plasma can fully contact with the ozone decomposition catalyst particles filled in the plasma generation chamber and be decomposed into oxygen, thereby realizing effective in-situ decomposition of ozone. In this way, the ozone residue in the purified air can be effectively reduced, and the air purification performance thereof can be improved.

The above-mentioned air purification device increases the contact area between ozone and the ozone decomposition catalyst particles through the synergistic effect of the plasma and the ozone decomposition catalyst particles, and uses the thermal effect generated during the gas discharge process to accelerate the ozone decomposing process. Decomposition, inhibition of water poisoning and deactivation of ozone decomposition catalyst particles, not only can effectively remove TVOC gas molecules in the air, reduce ozone residues, but also effectively prolong the service life of ozone decomposition catalyst particles, reduce use costs, and improve energy utilization efficiency.

In any of the embodiments, the ozone decomposition catalyst particles include a catalytically active component, and the catalytically active component includes at least one of cerium manganese oxide, cobalt manganese oxide and copper manganese oxide.

In any of the embodiments, the ozone decomposition catalyst particle further includes a porous carrier, and the catalytically active component is loaded on the porous carrier.

In any of the embodiments, the porous support includes at least one of porous alumina particles and porous molecular sieves.

In any embodiment, the ozone decomposition catalyst particles include at least one of porous alumina particles loaded with cerium manganese oxide and porous alumina particles loaded with copper manganese oxide.

In any of the implementation manners, the volume average particle diameter of the ozone decomposition catalyst particles is 0.5mm-3mm.

In any of the implementation manners, the volume average particle diameter of the ozone decomposition catalyst particles is between 1 mm and 2 mm.

In any of the implementation manners, the filling volume of the ozonolysis catalyst particles is 60%-90% of the total volume of the plasma generation cavity.

In any of the implementation manners, both the gas inlet and the gas outlet are arranged on the cavity wall of the plasma generation chamber, and the gas inlet and the gas outlet are arranged in a staggered manner.

In any implementation manner, the material of the plasma generating cavity is an insulating dielectric material; and/or,

The first electrode is one of a stainless steel rod and a tungsten rod; and/or,

The second electrode is one of copper mesh, aluminum foil and wire mesh.

In any implementation manner, the plasma generating chamber includes an insulating medium tube and a sealing cover for sealing the insulating medium tube.

Description of drawings

FIG. 1 is a schematic structural view of an air purification device according to an embodiment of the present invention.

Explanation of reference signs:

100. Air purification device; 110. Plasma generating cavity; 111. Insulation medium tube; 112. Sealing cover; 101. Air inlet; 102. Air outlet; 120. First electrode; 130. Second electrode; 140. Ozonolysis catalyst particles.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiments.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to FIG. 1 , an embodiment of the present invention provides an air purification device 100 , which includes a plasma generating chamber 110 , a first electrode 120 , a second electrode 130 and ozone decomposition catalyst particles 140 .

The plasma generation chamber 110 has an air inlet 101 for the air to be purified to enter and an air outlet 102 for the air to be purified to discharge.

The first electrode 120 is disposed in the plasma generation chamber 110 .

The second electrode 130 is disposed outside the plasma generating chamber 110 . A voltage can be applied between the second electrode 130 and the first electrode 120 to generate plasma in the plasma generation chamber 110 .

Ozonolysis catalyst particles 140 are filled in the plasma generation cavity 110 .

The above-mentioned air purification device 100, when working, feeds the air to be purified from the air inlet 101, and applies a voltage between the second electrode 130 and the first electrode 120, so that the gas in the plasma generation chamber 110 undergoes a discharge reaction to generate plasma These plasmas include but are not limited to high-energy electrons and strong oxidative active groups, so these plasmas can interact with TVOC gas molecules in the air to be purified, so that TVOC gas molecules are oxidized and reduced to CO ₂ and H ₂ O and other harmless products to achieve effective removal of TVOC. In addition, a large amount of by-product ozone simultaneously generated during the process of generating plasma by gas discharge can fully contact with the ozonolysis catalyst particles 140 filled in the plasma generation chamber 110 and be decomposed into oxygen, thereby realizing the in-situ ozone Effective decomposition, so that it can effectively reduce the ozone residue in the purified air and improve its air purification performance.

In addition, because the catalytic efficiency of the ozonolysis catalyst is greatly affected by the humidity of the air, etc., generally, the catalytic efficiency and service life of the ozonolysis catalyst decrease after a period of use, so frequent replacement is required, resulting in high cost of use. For example, an ozonolysis catalyst is arranged downstream of the air outlet 102 of the air purification device 100 to decompose ozone in the air after plasma purification, but there is a problem of severe catalyst poisoning and deactivation.

The above-mentioned air purification device 100 fills the ozone decomposition catalyst particles 140 in the plasma generation cavity 110, which not only facilitates the in-situ decomposition of ozone, but also makes the heat generated by the gas discharge reaction act on the air and the ozone decomposition catalyst particles 140 in time. , reduce the risk of water poisoning and deactivation of the ozonolysis catalyst particles 140 , thereby prolonging the service life of the ozonolysis catalyst particles 140 . On the other hand, the utilization efficiency of energy is also effectively improved, and a large amount of heat generated in the plasma generation cavity 110 during operation is avoided, which causes serious waste of energy due to unutilized energy.

Above-mentioned air cleaning device 100, through the synergistic effect of plasma and ozonolysis catalyst particle 140, utilizes the mode that ozonolysis catalyst particle 140 is filled, increases the contact area of ozone and ozonolysis catalyst particle 140, and utilizes the gas discharge process to produce The thermal effect accelerates the decomposition of ozone and inhibits the water poisoning and inactivation of the ozone decomposition catalyst particles 140. It can not only effectively remove TVOC gas molecules in the air and reduce ozone residues, but also effectively prolong the service life of the ozone decomposition catalyst particles 140 and reduce the use cost. Improve energy utilization efficiency.

In some of these embodiments, the ozonolysis catalyst particles 140 include a catalytically active component (not shown). The catalytic active component includes but not limited to at least one of cerium manganese oxide, cobalt manganese oxide and copper manganese oxide. These catalytically active components have a high decomposition efficiency for ozone.

Further, the ozonolysis catalyst particle 140 also includes a porous carrier (not shown). The catalytically active components are loaded on the porous carrier. Further, the porous carrier includes but is not limited to at least one of porous alumina particles and porous molecular sieves.

As an example, the ozonolysis catalyst particles 140 include at least one of porous alumina particles loaded with cerium manganese oxide, porous alumina particles loaded with copper manganese oxide, and the like. In a specific example, the ozonolysis catalyst particles 140 are porous alumina particles loaded with cerium manganese oxide.

It can be understood that the porous alumina particles loaded with cerium-manganese oxides and the porous alumina particles loaded with copper-manganese oxides can be obtained commercially or by self-made.

As an example, porous alumina particles loaded with cerium manganese oxide can be produced by the following production method. Wherein, the porous alumina particles may be porous activated alumina pellets. The preparation method includes the following steps S1-S3.

S1. Mixing a water-soluble cerium source and a water-soluble manganese source with water to form a precursor solution.

Wherein, the water-soluble cerium source may be anhydrous cerium nitrate or hydrated cerium nitrate, such as hexahydrate cerium nitrate powder. The water-soluble manganese source can be at least one of manganese nitrate and manganese acetate.

S2. Immerse the above porous alumina particles in the above precursor solution, and add sodium hydroxide solution and mix evenly.

Wherein, the sodium hydroxide solution is added dropwise, and its effect is as a precipitating agent.

In one example, the mixing time after adding the sodium hydroxide solution may be 8h˜12h.

S3, taking out the impregnated porous alumina particles, followed by drying and calcination in an oxidizing atmosphere to obtain porous alumina particles loaded with cerium manganese oxide.

In an example, the drying temperature may be 80°C-100°C, and the drying time may be 8h-12h.

In one example, the oxidizing atmosphere for calcination can be air or oxygen.

In an example, the calcination temperature may be 450°C-600°C, and the calcination time may be 2h-4h. Further, the heating rate of calcination may be 2° C./min˜5° C./min.

In some embodiments, the volume average particle diameter of the ozonolysis catalyst particles 140 is 0.5mm-3mm.

Consider the impact of the accumulation of the ozone decomposition catalyst particles 140 on the wind resistance, within a certain range, the smaller the volume average particle diameter of the ozone decomposition catalyst particles 140, the tighter the accumulation, so the greater the wind resistance to the air; the ozone decomposition catalyst particles 140 The larger the volume average particle size, the smaller its own specific surface area, the less catalytically active components that can be loaded, the smaller the contact area with ozone, and the lower the ozone degradation efficiency. Therefore, on the one hand, the ozonolysis catalyst particles 140 are required to be fully contacted with ozone to improve the efficiency of ozonolysis; The processing rate of the device 100 is affected. Through a lot of research, controlling the volume average particle size of the ozonolysis catalyst particles 140 within the above-mentioned appropriate range can obtain a larger air treatment rate and better ozone degradation efficiency.

Further, the volume average particle diameter of the ozonolysis catalyst particles 140 is 1mm-2mm. In a specific example, the volume average particle diameter of the porous carrier is 1mm-2mm. It can be understood that the volume average particle diameter of the ozonolysis catalyst particles 140 is not greatly affected by the loading of the catalytically active component. Within this preferred range, better ozone degradation efficiency can be obtained at a larger air treatment rate (eg ≥ 1 L/min).

In some implementations, the filling volume of the ozonolysis catalyst particles 140 is 60%-90% of the total volume of the plasma generation chamber 110 . It can be understood that, as an example, the filling volume of the ozonolysis catalyst particles 140 may be 60%, 70%, 80%, or 90% of the total volume of the plasma generation chamber 110 . The filling volume of the ozonolysis catalyst particles 140 may be within a range formed by any two numerical values described above as end values.

It should be noted that the filling volume here refers to the volume occupied by the ozonolysis catalyst particles 140 as a whole in the plasma generation cavity 110 , including the pores between the ozonolysis catalyst particles 140 when they are piled up. For example, the filling volume of the ozone decomposition catalyst particles 140 is 90% of the total volume of the plasma generation chamber 110, which means that the entire 90% space of the plasma generation chamber 110 is filled with the ozone decomposition catalyst particles 140, but it does not mean that the ozone decomposition When the catalyst particles 140 are stacked, there are no pores between the particles.

It can be understood that when the voltage applied between the first electrode 120 and the second electrode 130 is higher, the amount of ozone generated is higher, and it is necessary to have a sufficient reaction between the ozone and the ozonolysis catalyst particles 140, and the ozonolysis catalyst particles 140 The fill volume can be set at a correspondingly higher level.

In some of the embodiments, both the gas inlet 101 and the gas outlet 102 are arranged on the cavity wall of the plasma generation chamber 110 , and the gas inlet 101 and the gas outlet 102 are staggered. It should be noted that the staggered arrangement of the gas inlet 101 and the gas outlet 102 refers to the staggered arrangement relative to the plasma generation chamber 110 in the axial direction of the plasma generation chamber 110 or in a direction perpendicular to the axial direction, so as to The flow path of the air to be purified in the plasma generating chamber 110 is prolonged, the interaction time of the gas with the plasma and the ozone decomposition catalyst particles 140 is prolonged, and the air purification efficiency is improved.

It can be understood that, in other examples, the gas inlet 101 and the gas outlet 102 may also be disposed opposite to each other in the axial direction of the plasma generation chamber 110 .

In some implementations, the material of the plasma generating chamber 110 may be an insulating dielectric material.

Further, the plasma generation chamber 110 includes an insulating medium tube 111 and a sealing cover 112 for sealing the insulating medium tube 111 , so as to form a closed plasma generating chamber. Further, the material of the insulating medium tube 111 includes but not limited to quartz glass and alumina. Further, the sealing cover 112 may be made of polytetrafluoroethylene. In a specific example, the insulating medium pipe 111 is a hollow tubular structure with two ends open, and two ends of which are respectively provided with sealing caps 112 for sealing.

Further, both the air inlet 101 and the air outlet 102 are arranged on the side wall of the insulating medium pipe 111 , and the air inlet 101 is arranged higher than the air outlet 102 . In an example, the ozone decomposition catalyst particles 140 are filled into the insulating medium pipe 111 and not lower than the height of the air inlet 101 .

In some of the implementation manners, the first electrode 120 may be one of a rod-shaped electrode such as a stainless steel rod or a tungsten rod. The first electrode 120 is used as a high voltage, and it is arranged at the axial position of the insulating medium tube 111 . Further, the first electrode 120 at least passes through the sealing cover 112 at one end and is sealed by the sealing cover 112 .

In some implementations, the second electrode 130 is adhered to the outer wall of the insulating medium tube 111 . In some embodiments, the second electrode 130 is one of copper mesh, aluminum foil, copper foil and barbed wire.

In some of these implementations, the above-mentioned air purification device 100 also includes an air pump (not shown in the figure), and the air pump can be communicated with the air inlet 101 of the plasma generation chamber 110 for pumping air into the plasma generation chamber 110 .

In order to make the purpose, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the following specific examples, but the present invention is by no means limited to these examples. The embodiments described below are only preferred embodiments of the present invention, which can be used to describe the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

In order to better illustrate the present invention, the content of the present invention will be further described below in conjunction with the examples. The following are specific examples. The following raw materials can be obtained commercially unless otherwise specified.

Example 1

As shown in FIG. 1 , specifically, the air purification device 100 includes a plasma generating chamber 110 , a first electrode 120 , a second electrode 130 and ozone decomposition catalyst particles 140 . The plasma generation chamber 110 includes an insulating medium tube 111 and a sealing cover 112 for sealing the insulating medium tube 111 . The insulating medium tube 111 is a quartz glass tube, the sealing cover 112 is made of polytetrafluoroethylene, and the first electrode 120 is a tungsten rod, which is arranged on the axis of the insulating medium tube 111 . The second electrode 130 is aluminum foil.

Wherein, the ozonolysis catalyst particles 140 are filled in the insulating medium pipe 111, which are specifically porous active alumina particles loaded with cerium manganese oxide catalyst, with a volume average particle size of 1.5mm, which are commercially available. The filling volume of the ozonolysis catalyst particles 140 is 90% of the total volume of the plasma generating chamber 110 .

Example 2

Embodiment 2 is basically the same as Embodiment 1, the only difference is that the volume average particle diameter of the ozonolysis catalyst particles 140 is 2.5mm, which are commercially available.

Comparative example 1

Comparative Example 1 is basically the same as Example 1, the only difference is that in Comparative Example 1, the insulating medium tube 111 is not filled with the above-mentioned catalyst particles, but the catalyst is directly loaded on the inner wall of the insulating medium tube 111 . Specifically, the cerium manganese oxide catalytic layer is formed on the entire surface of the inner wall of the insulating dielectric tube 111 . Specifically, the thickness of the cerium manganese oxide catalytic layer is 40 μm. The other structures and materials of the air purification device 100 and the test conditions of the air purification performance are the same.

(1) Air purification performance test:

Pass the gas containing TVOC gas pollutants into the insulating dielectric tubes of the above-mentioned examples and comparative examples at a rate of 1 L/min from the gas inlet, and apply an alternating voltage between the first electrode and the second electrode to generate an electric field , its Vpp (Voltage Peak-Peak, peak-to-peak voltage) is 11KV, the frequency is 9KHz, and the real-time discharge is 30min. The purified air is discharged from the air outlet. At 5, 10, 15, 20, 25, and 30 minutes, the gas discharged from the air outlet is collected once respectively, and the real-time ozone content is detected, as shown in Table 1.

Wherein, the detection method of ozone content is to obtain by real-time reading of ozone detector.

Among them, ppb (part per billion) is a dimensionless quantity, also known as parts per billion concentration.

(2) Catalyst life test:

After continuous discharge for 2 hours under the conditions of the air purification performance test, the gas discharged from the gas outlet was collected and the ozone content was detected, as shown in Table 1.

Table 1

It can be seen that in Comparative Example 1, the catalyst is coated on the inner wall of the insulating medium tube, and in Example 1, the catalyst is filled inside the insulating medium tube. After real-time purification for 30min and long-term operation for 2h, the residual ozone of Comparative Example 1 is much higher than that of Example 1. This shows that the decomposition efficiency of comparative example 1 for ozone is much lower than that of example 1. And after using for a long time, the catalytic efficiency of the catalyst of Comparative Example 1 is much lower than that of Example 1.

The analysis may be that the catalyst in Comparative Example 1 is coated on the inner wall of the insulating medium tube, its specific surface area is relatively small, and the contact area between ozone and the catalyst is small. Under the action of the air pump, the generated ozone is discharged out of the insulating medium before it can be decomposed. The outside of the tube leads to low real-time decomposition efficiency of ozone. At the same time, due to long-term use, the catalyst is poisoned by water and becomes invalid.

However, in the embodiment of the present invention, the catalyst particles are filled in the insulating dielectric tube. Due to the large specific surface area of the catalyst particles, the contact area with the ozone is large, and the ozone formed in the insulating dielectric tube can be decomposed by the filled catalyst particles. At the same time, the gas discharge process The thermal effect produced in the process accelerates the decomposition of ozone, so the probability of catalytic decomposition reaction of ozone is greatly increased, and the amount of ozone finally produced is less than 300ppb, of which Example 1 is far less than 100ppb, realizing efficient in-situ decomposition of ozone. At the same time, the thermal effect generated during the gas discharge process can inhibit the water poisoning deactivation of the ozonolysis catalyst particles, thus improving its catalytic efficiency for long-term use to a certain extent, in other words prolonging its service life.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be determined by the appended claims, and the description and drawings can be used to explain the contents of the claims.

Claims (11)

1. An air cleaning apparatus, comprising:

a plasma generation cavity (110) having an air inlet (101) for the air to be purified to be introduced and an air outlet (102) for the purified air to be discharged;

a first electrode (120) disposed within the plasma generation chamber (110);

a second electrode (130) arranged outside the plasma generation cavity (110), wherein a voltage can be applied between the second electrode (130) and the first electrode (120) so as to generate plasma in the plasma generation cavity (110); and

Ozone decomposition catalyst particles (140) are filled in the plasma generation chamber (110).

2. The air cleaning apparatus according to claim 1, wherein the ozonolysis catalyst particles (140) comprise a catalytically active component comprising at least one of cerium manganese oxide, cobalt manganese oxide, and copper manganese oxide.

3. The air cleaning apparatus according to claim 2, wherein said ozonolysis catalyst particles (140) further comprise a porous support, said catalytically active component being supported on said porous support.

4. The air purification apparatus of claim 3, wherein the porous support comprises at least one of porous alumina particles and porous molecular sieves.

5. The air cleaning apparatus according to claim 1, wherein the ozonolysis catalyst particles (140) include at least one of cerium manganese oxide-supported porous alumina particles and copper manganese oxide-supported porous alumina particles.

6. An air cleaning apparatus according to any one of claims 1 to 5, wherein the volume average particle diameter of the ozonolysis catalyst particles (140) is 0.5mm to 3mm.

7. The air cleaning apparatus according to claim 6, wherein the volume average particle diameter of the ozonolysis catalyst particles (140) is 1mm to 2mm.

8. The air cleaning apparatus according to any one of claims 1 to 5, wherein a filling volume of said ozonolysis catalyst particles (140) is 60% to 90% of a total volume of said plasma generating cavity (110).

9. The air cleaning apparatus according to any one of claims 1 to 5, wherein the air inlet (101) and the air outlet (102) are both provided on a chamber wall of the plasma generation chamber (110), and the air inlet (101) and the air outlet (102) are arranged in a staggered manner.

10. The air cleaning apparatus according to any one of claims 1 to 5, wherein a material of said plasma generation chamber (110) is an insulating dielectric material; and/or the number of the groups of groups,

the first electrode (120) is one of a stainless steel rod and a tungsten rod; and/or the number of the groups of groups,

the second electrode (130) is one of a copper mesh, an aluminum foil, a copper foil and an iron wire mesh.

11. An air cleaning apparatus according to any one of claims 1 to 5, wherein said plasma generation chamber (110) comprises an insulating medium tube (111) and a sealing cover (112) for sealing said insulating medium tube (111).

Images