KR101038689B1 - Photocatalysis reactor - Google Patents

Abstract

PURPOSE: A photocatalyst reactor is provided to secure the excellent hazardous pollutant removal effect by using a monolithic photocatalyst, and to remove the necessity of the periodic filter exchange for removing hazardous pollutants. CONSTITUTION: A photocatalyst reactor(20) comprises the following: a monolithic photocatalyst(23); a first electrode(21) installed on one side of the monolithic photocatalyst;and a second electrode(22) installed on the other side of the monolithic photocatalyst. The monolithic photocatalyst contains a phothocatalyst material including titanium oxides, a ceramic material containing alumina or alpha alumina, and a cocatalyst including zeolite.

Description

Photocatalytic Reactor

The present invention is a photocatalytic reactor, and more particularly, a photocatalyst material including titanium oxide of type 1, titanium oxide of type 2, alpha-alumina (α-Al2O3), high porosity of particles of at least 0.2 cc / g, and 20 A monolithic photocatalyst comprising a ceramic material comprising alumina having an area of more than m 2 / g, and a promoter comprising a zeolite; A first electrode provided on the first side of the monolithic photocatalyst; And a second electrode provided on the second side of the monolithic photocatalyst.

In general, not only harmful exhaust gas from internal combustion engines, but also combustion gases and odors generated in factories, apartment complexes, large restaurants and waste incinerators cause pollution. The gas discharged here includes incompletely burned hydrocarbons, carbon monoxide, nitrogen oxides, sulfur oxides, and the like, which are harmful to the human body, and thus need to be purified and discharged. In addition, wastewater from factories or waste incineration plants also contaminates water quality, which must be discharged after purification.

Various types of purifiers have been used to purify these harmful pollutants. Conventional purification apparatus mainly used a method of collecting harmful pollutants by using an adsorbent such as adsorbed carbon, activated carbon, and charcoal. However, in the case of the adsorption method using an adsorbent to remove contaminants, it shows excellent collection performance at the initial stage of installation, but as the harmful pollutants are adsorbed on the adsorbent, the amount that can be collected is reduced. It becomes impossible. Therefore, in the case of a purifier using an adsorbent, there is a problem that the collection filter must be replaced at regular intervals in order to maintain high performance at all times. In particular, the collection filter has a limited lifespan, and is expensive, not only to give an economic burden to the user, but also have a problem that secondary pollutants are generated when processing the collecting filter with contaminants.

On the other hand, in addition to the method using the adsorbent has been used to remove the harmful pollutants by burning them. However, in the combustion method of burning and removing harmful pollutants, there is an advantage of removing harmful pollutants by introducing harmful pollutants into the combustion furnace and burning them, but it is composed of a combustion furnace, a heat exchanger, a blower, etc. It has six times the structural problems compared to the adsorption method, so it was very difficult to apply to small and medium businesses, livestock facilities and small restaurants except large companies. In addition, there is a disadvantage that the fuel cost burden for combustion in the operation process is very large.

In addition, the washing method using washing water is used to remove the harmful pollutants.However, the washing method has a low odor removal efficiency, so it must be used in parallel with other facilities, and additional water treatment facilities must be installed to treat the treated water. There is this.

The present invention has been made to solve this problem, and to provide a photocatalytic reactor that is excellent in removing harmful pollutants and does not require periodic filter exchange for removal of harmful pollutants.

In addition, the present invention provides a photocatalytic reactor capable of removing contaminants without generating secondary harmful pollutants.

The photocatalytic reactor according to the present invention for solving the above technical problem is a photocatalyst material comprising titanium oxide of the first type, titanium oxide of the second type, alpha-alumina (α-Al2O3), particles of 0.2cc / g or more A monolithic photocatalyst comprising a ceramic material comprising alumina having a high porosity and an area greater than 20 m 2 / g, and a promoter comprising a zeolite; A first electrode provided on the first side of the monolithic photocatalyst; And a second electrode provided on a second side of the monolithic photocatalyst.

In this case, the apparatus may further include a HEPA filter installed adjacent to the first electrode, and may further include a PE (Polyether) network filter installed adjacent to the HEPA filter.

The apparatus may further include an ozone filter installed adjacent to the second electrode.

The titanium oxide of the first type may include 35 wt% or more of the monolithic photocatalyst, and the titanium oxide of the second type may include 20 wt% or more of the monolithic photocatalyst.

In addition, the alpha-alumina (α-Al2O3) is at least 7 wt% of the monolithic photocatalyst, the alumina having a high porosity of 0.2cc / g or more and an area of more than 20 m2 / g is the monolithic photocatalyst It may contain more than 7 wt%.

In addition, the monolithic photocatalyst may be rotatable clockwise or counterclockwise.

The photocatalytic reactor using the monolithic photocatalyst according to the present invention exhibits higher efficiency of removing harmful pollutants than the conventional photocatalyst.

In addition, the photocatalytic reactor using the monolithic photocatalyst according to the present invention does not need to periodically replace the filter, and does not generate secondary harmful pollutants during use, thereby maintaining a comfortable environment.

1 is an exploded perspective view of a photocatalyst filter in a photocatalyst reactor according to an embodiment of the present invention.
2 is a schematic diagram of a photocatalytic reactor according to one embodiment of the invention.
3 is a perspective view of a malodor prevention equipment using a photocatalytic reactor according to an embodiment of the present invention.
Figure 4 is an exploded perspective view of the malodor prevention equipment of FIG.
5 is a process chart of manufacturing a monolithic photocatalyst according to an embodiment of the present invention.
6 is a graph measuring the amount of hydrocarbon accumulated over time.
7 is a graph measuring the amount of accumulated nitrogen oxides (NOx) over time.
8 is a schematic diagram of a motor vehicle motor equipped with a photocatalyst according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is an exploded perspective view of a photocatalyst filter in a photocatalyst reactor according to an embodiment of the present invention.

The photocatalyst filter 10 according to an embodiment of the present invention is formed by passing a plurality of fine flow paths in a direction in which harmful pollutants enter, a monolith type photocatalyst 13 including a photocatalyst, and a monolith type photocatalyst 13 ), The insulators 11 and 15 surrounding the first electrode 12 and the second electrode 14, the first electrode 12, Electrode terminals 16 and 17 for connecting the second electrode 14 and an external electric wire are included.

At this time, the shape of the cross section of the monolithic photocatalyst 13 is formed similarly to the shape of the cross section of the flow path. That is, in one embodiment of the present invention, the cross-sectional shape of the monolithic photocatalyst 13 is formed in a rectangle. The cross-sectional shape of the monolithic photocatalyst 13 may be variously modified, such as hexagon (honeycomb) and pentagon. In addition, a plurality of channels (fine flow paths) having a hexagonal shape, a pentagonal shape, a circular shape, a rectangular shape, and the like in the longitudinal direction of the monolithic photocatalyst 13 are formed long so that the exhaust air can flow. In particular, it is preferable to use a monolithic photocatalyst having a honeycomb-shaped channel that is strong in impact and has a wide gas collection area. On the other hand, the channel of the monolithic photocatalyst is preferably manufactured so as to rotate clockwise or counterclockwise. When the internal flow path of the monolithic photocatalyst is rotated, the specific surface area is increased, and the plastic administration material is relatively small.

The monolithic photocatalyst 13 according to an embodiment of the present invention is a ceramic comprising a photocatalyst material including titanium oxide of type 1 and titanium oxide of type 2, alumina of type 1 and alumina of type 2 Material, and a promoter comprising a zeolite. At this time, the titanium oxide of the first type is preferably 35 wt% or more in the monolithic photocatalyst 13, and the titanium oxide of the second type is preferably contained in 20 wt% or more of the monolithic photocatalyst 13. In addition, the alumina of the first type is preferably 7 wt% or more in the monolithic photocatalyst 13, and the alumina of the second type is preferably 7 wt% or more in the monolithic photocatalyst 13.

Titanium oxide of type 1 and titanium oxide of type 2 include TiO (molecular weight: 63.866, CAS registration number: 12137-20-1), TiO2 (molecular weight: 79.866, CAS registration number: 13463-67-7), TiO2 (Molecular weight: 79.866, CAS registration number: 1317-80-2), TiO2 (molecular weight: 79.866, CAS registration number: 1317-70-0), TiO2 (molecular weight: 79.866, Cas registration number: 1309-63-3) At least one may be used. At this time, it is preferable that titanium oxide of a 1st type and titanium oxide of a 2nd type use a different titanium oxide.

Meanwhile, at least one of TiOA and TiOB may be used as the titanium oxide of the first type and the titanium oxide of the second type. At this time, it is preferable that titanium oxide of a 1st type and titanium oxide of a 2nd type use a different titanium oxide.

[Antibacterial Titanium Oxide Nanoparticles Using TiOA-hydrothermal Synthesis]

Distilled water was added to Ti (SO4) 2 (Kanto Co., 24%) used as a starting material to prepare 0.1M Ti (SO4) 2 aqueous solution, and then dropwise addition of ammonium hydroxide (NH4OH, Junsei Co., 28%) was precipitated. Adjust the pH of the prepared Ti (OH) 4 to 6-9, and stir for about 30 minutes to allow sufficient reaction. The obtained precipitate was repeatedly washed several times in a centrifugal separator to sufficiently remove impurities, and the washed precipitate was diluted with distilled water to 0.1M aqueous solution and then completely dispersed through stirring and sonication. The 0.1 M Ti (OH) 4 aqueous solution obtained above was hydrothermally treated at 150 ° C. under saturated steam pressure for 3 hours using an autoclave device to prepare a final titanium oxide solution, and sodium hydroxide (NaOH). Titanium oxide (Anatase) is formed at 557.6 ℃ using.

[TiOB-Titanium oxide in which carbon is deposited on the surface by surface treatment by microwave low temperature plasma method] When the titanium oxide according to the present invention is used, plasma discharge can be caused at low pressure (2V to 24V), so that ozone is hardly generated. In addition, the low-voltage plasma discharge lowers power consumption, thereby saving energy.

The alumina of type 1 and the alumina of type 2 may be at least one of alpha-alumina (α-Al 2 O 3) or alumina having particles having a high porosity of 0.2cc / g or more and an area of more than 20 m 2 / g. It is preferable that alumina of type 1 and alumina of type 2 use different aluminas.

2 is a schematic diagram of a photocatalytic reactor according to one embodiment of the invention. The photocatalytic reactor 20 according to an embodiment of the present invention includes a first electrode 21 and a second electrode 21 for generating low temperature plasma, and the first electrode 21 and the second electrode 22. And a monolithic photocatalyst 23 interposed therebetween. In addition, wires 26 and 27 for applying a voltage from the outside are connected to each of the first electrode 21 and the second electrode 22. In addition, the pre-filter 24 is installed on the inlet side to which harmful pollutants and air or waste water, etc., and the post filter 25 is installed on the outlet side. In addition, a circular insulator 28 forms an outer portion of the photocatalytic reactor 20.

In the photocatalytic reactor 20 according to the embodiment of the present invention, the monolithic photocatalyst may perform gas purification, dust collection, sterilization, and deodorization.

In the photocatalytic reactor 20 according to an embodiment of the present invention, a HEPA (high efficiency particulate arrestor) filter may be mainly used as the prefilter 24, and the HEPA filter is made of synthetic fiber. The prefilter 24 performs a function of removing the incoming large dust or particles.

In the photocatalytic reactor 20 according to an embodiment of the present invention, an ozone filter is mainly used as the post filter 25. The ozone filter removes a small amount of ozone generated after the photocatalytic reaction.

On the other hand, the photocatalytic reactor 20 may be manufactured in various sizes to have a rectangular shape having a circular width of 100 mm in diameter and 150 mm in length and 70 mm in length, and the thickness thereof may also be modified as necessary.

3 is a perspective view of a malodor prevention equipment using a photocatalytic reactor according to an embodiment of the present invention.

As shown in FIG. 3, the malodor prevention equipment 100 of the present invention is installed outside the building. Odor prevention equipment is installed in parallel with the floor, the impeller 40 and the motor 41 and the exhaust port 42 for driving the impeller is installed outside the odor prevention device.

Figure 4 is an exploded perspective view of the malodor prevention equipment of FIG.

As shown in FIG. 4, an inlet 31, an outlet 33, and a passage 32 communicating with the inlet 31 and the outlet 33 are included in the odor preventing facility 100. PE network filter (Polyether Filter, 70) is installed in the odor prevention facility 100 to prevent the inflow of large foreign substances, hepa filter 60, photocatalyst filter 50 and the ozone filter on the flow path (32) 80) is installed.

5 is a process chart of manufacturing a monolithic photocatalyst according to an embodiment of the present invention. First, the grinding process (S10) is performed using a grinder to finely and evenly grind the titanium oxide, which is a photocatalytic material, and the alumina, which is a ceramic material for increasing the specific surface area.

Among the photocatalyst materials, the most widely used titanium oxide material is harmless to human body and is inexpensive, and not only one type of titanium oxide is used but also two or more types are used to improve durability and purification performance. In one embodiment of the present invention, titanium oxide of type 1 and titanium oxide of type 2 are used. The titanium oxide of type 1 is preferably added at least 35 wt% of the photocatalyst material introduced, and the titanium oxide of type 2 is preferably added at least 20 wt% of the photocatalyst material introduced. Materials that can be used as type 1 titanium oxide and type 2 titanium oxide have been described above. Preferably, TiOA is used as type 1 titanium oxide and TiOB is used as type 2 titanium oxide.

The alumina used as the intermediate layer has a very high specific surface area in the ceramic material, which provides a sufficient opportunity for the catalyst and reactant gas to contact each other, connects the photocatalyst materials to each other, and provides mechanical strength after sintering (S80). On the other hand, alumina may be used by mixing at least one or two or more of alpha-alumina (α-Al 2 O 3) or alumina having a high porosity of 0.2 cc / g or more and an area of more than 20 m 2 / g. In one embodiment of the present invention, alpha-alumina is preferably added 7 wt% or more of the photocatalyst material introduced, and the structure of the alumina core particles is preferably added 7wt% or more of the photocatalyst material. In one embodiment of the present invention, the grinding process (S10) is sufficiently carried out to secure the size of 20 ㎛ which is excellent in the activity of the photocatalyst material and the ceramic material.

When the grinding step (S10) is completed, the sieve process (S20) to use only the powder of a uniform size. The sieving process causes the powder having a size of 20 μm, which is excellent in the activity of the photocatalyst material, to be the center of the particle size normal distribution.

After the sieving process (S20) is completed, the mixture is added to the photocatalyst and the ceramic material as a cocatalyst material for improving the purification and durability of the photocatalyst, and then mixed with the zeolite.

When the mixing process is completed, the dough (S40) to have a predetermined viscosity to enable extrusion. In this case, a titanium dioxide sol (TiO 2 sol) may be used as the binder material. Moreover, water or ethyl alcohol can be added as needed.

When the dough is completed, the dough is filled in the extruder, an extrusion die is installed at the tip of the extruder, and extruded to form a photocatalyst in a monolithic carrier type (S50).

Forming the photocatalyst 50 is cut to a certain length and subjected to a drying step (S60) so that the moisture content at a room temperature to a certain level in order to remove the water and ethyl alcohol components contained in the molded body. When the room temperature drying is complete, put it in a drying oven and slowly dry at a temperature of 100 ℃ or less. The drying temperature varies depending on the type and content of the added binder, and the optimum condition is a temperature at which no burst occurs on the surface of the formed photocatalyst 50 during the drying process.

The photocatalyst in which the drying step (S60) is completed is subjected to a calcination step (S70) to remove the binder added for formability during extrusion into an calcination oven. Calcination is carried out at a temperature of 500 ℃ or less and the rate of temperature rise is 2 ℃ or less per minute to provide sufficient time for diffusion in the porous material to prevent evaporation of the binder present in the cell wall and to prevent cracking on the cell wall. do.

The temperature of the photocatalyst in which the calcining step (S70) is completed is given mechanical strength to the photocatalyst 50 through the sintering step (S80) at 600-900 ° C for 30 minutes or more to achieve crystallization of the cocatalyst. In this case, the temperature increase rate is controlled to 2 ° C. or less per minute so that the growth of alumina particles and crystallization of the promoter material can easily occur.

The monolithic photocatalyst of the present invention comprises a titanium oxide of type 1, a photocatalyst material containing titanium oxide of type 2, alumina of type 1, a ceramic material containing alumina of type 2, and a bath containing zeolite. It may include a catalyst.

Example  One Monolithic Photocatalyst  Produce

Prepared according to the same procedure as the monolithic photocatalyst manufacturing method described above, in which 40.31 g of TiOA was added to titanium oxide of type 1 and 23.91 g of TiOB to titanium oxide of type 2, , 9.17 g of alpha-alumina (α-Al2O3), 9.17 g of alumina having particles having a high porosity of 0.2 cc / g or more and an area of more than 20 m 2 / g, and 9.17 g of zeolite and 8.25 g of titanium dioxide sol (TiO2 sol). add g.

On the other hand, Table 1 shows the wt% (mass ratio of each component in the total mass) of the input material in the photocatalyst at the time of powder blending and firing.

Powder name Powder blending (wt%) After firing (wt%) TiOA 40.31 43 TiOB 23.91 27 Zeolite 9.17 10 Alumina A 9.17 10 Alumina B 9.17 10 Titanium dioxide sol
(TiO2 sol) 8.27 0

Experimental Example  One Photocatalyst  Hydrocarbon Removal Ability Measurement

After installing MCC (Manifold Catalyst Converter, 120K Engine Bench Aged Converter) and Example 1 photo-catalyst converter (PPH), the hydrocarbons were discharged at a constant rate, and then the total hydrocarbons accumulated over time The amount was measured.

Comparative example  One

Only the Manifold Catalyst Converter (MCC) and 120K Engine Bench Aged Converter (MCC) were installed, and the hydrocarbons were released at a constant rate, and the amount of total hydrocarbons accumulated over time was measured.

6 is a graph measuring the amount of hydrocarbon accumulated over time. Referring to FIG. 6, in Experimental Example 1, the photocatalyst reacts from about 40 seconds, and as the hydrocarbon is decomposed, the cumulative rate of hydrocarbons released at a constant rate decreases. It can be seen that the amount of accumulated total hydrocarbons (THC) is small. Therefore, it can be seen that the removal efficiency of contaminants of the photocatalyst of Example 1 is high.

Experimental Example  2 Photocatalyst  Nitrogen oxides NOx ) Removal capability measurement

After installing MCC (Manifold Catalyst Converter, 120K Engine Bench Aged Converter) and Example 1 photo-catalyst converter (PPH), the nitrogen oxides (NOx) were released at a constant rate, and accumulated over time. The amount of total nitrogen oxides (NOx) added was measured.

Comparative example  2

Only a Manifold Catalyst Converter (MCC) and a 120K Engine Bench Aged Converter (MCC) were installed, and the nitrogen oxides (NOx) were released at a constant rate, and then the total amount of NOx accumulated over time was measured.

7 is a graph measuring the amount of accumulated nitrogen oxides (NOx) over time. Referring to FIG. 7, it can be seen that in Experimental Example 2, as the nitrogen oxides (NOx) are decomposed, the accumulation rate of the nitrogen oxides (NOx) released at a constant rate decreases. In addition, in the case of Experimental Example 2 it can be seen that the amount of accumulated nitrogen oxides (NOx) is much less than Comparative Example 2. Therefore, it can be seen that the contaminant removal efficiency of the photocatalyst of the present invention is high.

Meanwhile, a photocatalytic reactor using a photocatalyst according to an embodiment of the present invention may be used in an atmospheric purification system, an odor prevention system, a wastewater purification system, a sterilization treatment system, and other environmental facilities by using a plasma reaction and a photocatalytic reaction together.

Experimental Example  3 of desulfurization equipment Yellow series  Odor Gas Removal

After installing the photocatalyst of Example 1 in a desulfurization facility, it was tested whether the sulfur series malodorous gas was removed.

Table 2 shows the sulfur-based malodorous gas concentration at the inlet and the sulfur-based malodorous gas concentration at the inlet and the gas chromatography / pulsed flame photometric detector after installing the photocatalyst of Example 1 in the desulfurization facility. It is the result measured.

ingredient Inlet concentration (ppm) Outlet concentration (ppm) Analysis equipment H2S 75.5 0.00 GC / PFPD CH3SH 98.5 0.00 GC / PFPD CH3SCH3 77.5 0.00 GC / PFPD CH3S2CH3 77.5 0.002 GC / PFPD

From the results in Table 2, it can be seen that the sulfur-based odor gas can be removed using the photocatalyst of the present invention.

Experimental Example  2 Elimination of Odor (Air Pollutants)

After the photocatalyst of Example 1 was installed in the malodor prevention facility, it was tested whether the malodorous gas and volatile organic substances (VOCs, Vols, ile or nic compounds) were purified.

Table 3 and Table 4 show the concentration of malodorous gas and volatile organics at the inlet and the concentration of malodorous gas and volatile organics at the outlet after the photocatalyst according to Example 1 of the present invention is installed in the malodor prevention facility. Measurement results were measured using PFPD, Flame Ionization Detector (GC / FID), Fourier transform infrared spectroscopy (FTIR), and gas chromatography-mass spectrometry (GC-MS).

Odor Gas Purification ingredient Inlet concentration (ppm) Outlet concentration (ppm) Analysis equipment CH3SH 10.0 0.00 GC / PFPD Trimethylamine (TMA) 27.0 0.00 GC / FID NH3 20 0.00 UV

Volatile Organics (VOCs) Purification ingredient Inlet concentration (ppm) Outlet concentration (after 20 minutes, ppm) Analysis equipment toluene (C6H5CH3) 500 5.40 FTIR, GC-MS propene (C3H6) 500 0.00 FTIR, GC-MS Acetaldehyde
(CH3CHO) 60 0.00 FTIR, GC-MS m-xylene (C9H10) 130 0.00 FTIR, GC-MS

From the results in Tables 3 and 4, it can be seen that the odor gas and volatile organic substances can be purified using the photocatalyst of the present invention.

Experimental Example  3 Removal of other harmful compounds

The photocatalyst of Example 1 was used to test whether other harmful compounds were removed. Table 5 shows the concentration of the other harmful compounds in the initial state and the concentrations of the other harmful compounds after the first 20 minutes using the photocatalyst of Example 1, Fourier transform infrared spectroscopy (FTIR) and gas chromatography-mass spectrometry (GC-MS). It is the result measured using.

ingredient Initial concentration (ppm) Concentration after 20 min (ppm) Removal efficiency Analysis equipment ammonia 98 7.5 92.3 FT-IR, GC Acetic acid
(acetic acid) 94 0.3 99.7 GC Toluene (primary) 92 0.00 100 FT-IR, GC Toluene (secondary) 200 2 99 FT-IR, GC benzene 76 10 87 GC

From the results in Table 5, it can be seen that other harmful compounds can be purified using the photocatalyst of the present invention.

8 is a schematic diagram of a motor vehicle motor equipped with a photocatalyst according to an embodiment of the present invention.

The autonomous motor 200 according to an embodiment of the present invention is a diesel engine 210 for self-igniting diesel or heavy oil fuel, a sensor 220 for sensing exhaust gas discharged from the diesel engine 210, a signal from the sensor Control device 230 for receiving and controlling, a microwave generator 240 for receiving a signal from the control device for generating a microwave, and a control device for controlling by the catalytic filter 250 for purifying the exhaust gas discharged from the diesel engine. When the exhaust gas is generated in the diesel engine 210, the autonomous motor 200 according to the exemplary embodiment of the present invention may purify the exhaust gas from the catalyst filter 250 to reduce pollutants in the exhaust gas.

As such, the use of the monolithic photocatalyst according to an embodiment of the present invention has the advantage of increasing the efficiency of removing contaminants when using the conventional photocatalyst. In addition, the small size photoreactor can process a large amount of gas to reduce the installation space, thereby saving installation costs.

Claims (12)

Pollutant removal photocatalytic reactor,
A photocatalyst material comprising titanium oxide of type 1, which is an antimicrobial titanium oxide nanoparticle using hydrothermal synthesis, and titanium oxide of type 2, surface-treated by a microwave low temperature plasma method,
A ceramic material comprising alumina having an alpha-alumina (α-Al 2 O 3) or particles of 0.2 cc / g or more and an area of more than 20 m 2 / g, and
Monolithic photocatalyst comprising a cocatalyst comprising a zeolite;
A first electrode provided on the first side of the monolithic photocatalyst; And
A photocatalytic reactor comprising a second electrode provided on a second side of the monolithic photocatalyst. The photocatalytic reactor of claim 1, further comprising a HEPA filter disposed adjacent to the first electrode. The photocatalytic reactor of claim 2, further comprising a polyether network filter disposed adjacent to the HEPA filter. The photocatalytic reactor of claim 3, further comprising an ozone filter disposed adjacent to the second electrode. The photocatalytic reactor of claim 1, further comprising an insulator surrounding the first electrode and the second electrode. The photocatalytic reactor of claim 1, wherein the titanium oxide of the first type comprises at least 35 wt% of the monolithic photocatalyst, and the titanium oxide of the second type comprises at least 20 wt% of the monolithic photocatalyst. According to claim 6, The alpha-alumina (α-Al2O3) is at least 7 wt% of the monolithic photocatalyst, the particles are 0.2cc / g or more, alumina having an area of more than 20 m 2 / g is the monolith Photocatalytic reactor comprising at least 7 wt% of the photocatalyst. delete delete 8. The photocatalytic reactor of claim 7, wherein the monolithic photocatalyst is rotatable clockwise or counterclockwise. delete delete

Images