KR102252279B1 - Catalyst filter comprising nano metalic catalyst sprayed on the surface of suport - Google Patents

Abstract

The present specification relates to a catalyst support including a catalyst support and a nano-metal catalyst sprayed on the surface of the catalyst support. Unlike conventional patented technology that requires a large amount of catalyst by molding and manufacturing catalyst particles as a carrier itself, such a catalyst filter uses a catalyst slurry prepared using a particulate catalyst, and a small amount of nano metal catalyst showing catalytic performance. Was sprayed onto the surface of the catalyst support. Accordingly, the catalyst filter according to an aspect of the present invention exhibits an effect that the specific surface area of the catalyst filter itself is not lowered compared to the specific surface area of the nanocatalyst particles. It is effective to disintegrate.

Description

Catalyst filter containing nano metal catalyst sprayed on the surface of the support {CATALYST FILTER COMPRISING NANO METALIC CATALYST SPRAYED ON THE SURFACE OF SUPORT}

The present specification relates to a catalyst filter including a nano-metal catalyst.

In the manufacture of filters, conventional ceramic filter materials selected as materials to operate in high temperature conditions have a disadvantage that it is difficult to meet economical efficiency for air cleaning because of the high product price. In order to overcome this, in the case of the existing filter, an organic or inorganic antibacterial agent was coated on the surface of filter materials such as paper and cotton. However, when the amount of coating of the antimicrobial agent is excessive when producing a paper filter, it affects the physical properties or color of the filter, resulting in poor marketability, and it is difficult to obtain an effect due to insufficient stability of the antimicrobial agent. In addition, there is a problem in that the performance is deteriorated as a phenomenon in which the coated material is chemically bonded to precipitate, aggregate or oxidize occurs.

Korean Patent Publication No. 336963 Korean Patent Publication No. 1154903

In the conventional supported catalyst manufacturing method in which the synthesized nanoparticles are supported on a filter media, the specific surface area of the supported catalyst is larger than the specific surface area of the original nanocatalyst particles due to the aggregation (aggregation) of the particles and the covering of the binder. There was a problem of deterioration. In addition, it is difficult to increase the degree of surface dispersion of nanoparticles, and because a large amount of nanocatalyst particles are required, it is a major obstacle to commercialization and mass production of catalyst coating filters.

In order to solve the above problems, the present specification aims to provide a catalyst filter including a nano metal catalyst.

In order to achieve the above object, the present invention provides a catalyst support and a catalyst filter including a nano-metal catalyst sprayed on the surface of the catalyst support in one aspect. In addition, in one aspect, the present invention provides a catalytic filter exhibiting very excellent volatile organic compound decomposition activity for air cleaning by variously different manufacturing methods such as slurry state, binder type, temperature, and manufacturing time.

The catalyst filter according to an aspect of the present invention uses a catalyst slurry prepared by using a particulate catalyst, unlike the existing patented technology, which requires a large amount of catalyst by molding and manufacturing catalyst particles as a carrier itself. A small amount of the nano-metal catalyst shown was sprayed onto the surface of the catalyst support. The catalyst filter according to an aspect of the present invention corresponds to a catalytic filter for air cleaning that exhibits activity at low temperatures and is excellent in economical efficiency, differing from existing patents in a method of manufacturing such as slurry state, binder type, temperature, and manufacturing time.

Accordingly, the catalyst filter according to an aspect of the present invention exhibits an effect that the specific surface area of the catalyst filter itself is not lowered compared to the specific surface area of the nanocatalyst particles. Effective to decompose. In addition, when the catalytic filter according to an aspect of the present invention is applied to an air cleaning-related field, it is expected to show high market competitiveness.

1 is a schematic diagram showing a process of preparing a coating slurry including a nano-metal catalyst sprayed on the surface of a catalyst support. A coating slurry containing a nano metal catalyst is prepared along the direction of the arrow.
2 is a schematic diagram showing a process of manufacturing a catalyst filter through a spray coating method and a low-temperature drying method of the prepared coating slurry. a) is a picture showing the spraying of the coating slurry on the carbon corrugated board filter, which is one of the catalyst supports, and b) is a picture showing the drying of the catalyst support on which the coating slurry has been sprayed.
3 is a diagram showing a result of confirming the durability of the manufactured catalytic filter, and is a photograph showing the external appearance of a filter manufactured by a conventional dip-coating method and a catalytic filter according to an aspect of the present invention.
Figure 4 is a photograph of the surface of the manufactured carbon corrugated filter observed using an optical and scanning electron microscope.

In one aspect, the present invention relates to a catalyst support including a catalyst support and a nano-metal catalyst sprayed on the surface of the catalyst support.

In one aspect of the present invention, the nano-metal catalyst may be spray-coated on the surface of the catalyst support.

In one aspect of the present invention, the nano metal catalyst may be sprayed onto the surface of the catalyst support to form a thin film layer.

In one aspect of the present invention, the catalyst support may be paper, cotton, or ceramic.

In one aspect of the present invention, the catalyst support is carbon paper, corrugated type carbon paper, carbon cloth, carbon felt, textile paper, cellulose pulp paper, nonwoven fabric, honeycomb paper filter And it may be at least one selected from the group consisting of cordierite.

In one aspect of the present invention, the nano metal catalyst is a noble metal catalyst of platinum or palladium; Or a transition in which at least one of copper, manganese, iron, vanadium, molybdenum, cobalt, nickel, and zinc is _{impregnated with at least one of titanium dioxide (TiO 2} ), silicon dioxide (SiO ₂ ), and aluminum oxide (Al ₂ O ₃₎ It may be a metal catalyst.

In one aspect of the present invention, the nano metal catalyst may be a manganese oxide-titania catalyst or a vanadia-titania catalyst.

In one aspect of the present invention, the nano metal catalyst may be prepared by a chemical vapor phase condensation method. The chemical vapor phase condensation method is described in Korean Patent Application Nos. 10-2012-0076675, 10-2012-0074786, and 10-2012-0054254, and the present specification includes the contents of these patent applications by reference.

In one aspect of the present invention, the manganese oxide-titania catalyst is a catalyst in which manganese oxide is supported on titania particles, and may have a specific surface area of 200 m 2 /g to 300 m 2 /g.

In one aspect of the present invention, the nano metal catalyst may be 15% to 30% by weight based on the weight of the catalyst filter. Specifically, the nano-metal catalyst is 5% by weight or more, 10% by weight or more, 15% by weight or more, 17% by weight or more, 19% by weight or more, 20% by weight or more, 21% by weight or more, 25% by weight based on the weight of the catalyst filter. % Or more, 30% by weight or more, 35% by weight or more, or 40% by weight or more, or 50% by weight or less, 45% by weight or less, 40% by weight or less, 35% by weight or less, 30% by weight or less, 25% by weight or less, 23 Weight% or less, 21% by weight or less, 20% by weight or less, 19% by weight or less, 17% by weight or less, 15% by weight or less, 10% by weight or less, or 5% by weight or less, but is not limited thereto.

In one aspect of the present invention, the weight of the nano-metal catalyst per unit area in the catalytic filter may be 300 g/m ² to 450 g/m ² . Specifically, the weight of the nano-metal catalyst per unit area in the catalytic filter is 200 g/m ² or more, 250 g/m ² or more, 300 g/m ² or more, 350 g/m ² or more, 370 g/m ² or more, 380 g/ m ² or more, 390 g/m ² or more, 400 g/m ² or more, 420 g/m ² or more, 450 g/m ² or more, 500 g/m ² or more, or 600 g/m ² or more, or 600 g/ m ² or less, 500 g/m ² or less, 450 g/m ² or less, 420 g/m ² or less, 400 g/m ² or less, 390 g/m ² or less, 380 g/m ² or less, 370 g/m ^{It may be 2} or less, 350 g/m ² or less, 300 g/m ² or less, 250 g/m ² or less, or 200 g/m ² or less. The weight of the nano-metal catalyst per unit area of the catalytic filter may be used interchangeably with the coating rate per unit area of the catalytic filter or the ratio of the nano-metal catalyst per unit area of the catalytic filter.

In one aspect, the present invention may relate to a method of manufacturing a catalyst filter including an injection step of injecting a nano metal catalyst onto a surface of a catalyst support as a method of manufacturing a catalyst catalyst according to an aspect of the present invention. have.

In one aspect of the present invention, spraying may be a spray coating method.

In one aspect of the present invention, the method may further include a distribution step of evenly spreading the nanometallic catalyst on the surface of the catalyst support after the spraying step.

In one aspect of the present invention, the distributing step may be a step of evenly spreading the nano metal catalyst on the surface of the catalyst support using compressed air.

In one aspect of the present invention, the method may further include a drying step of drying the catalyst support after the spraying step. Specifically, in one aspect of the present invention, the drying step may be performed after the spraying step and the dispensing step.

In one aspect of the present invention, the drying step may be performed for 2 to 10 hours at a temperature of 40 to 70 °C. Specifically, the temperature of the drying step is 30℃ or more, 35℃ or more, 40℃ or more, 50℃ or more, 60℃ or more, 70℃ or more, or 80℃ or more, or 80℃ or less, 70℃ or less, 65℃ or less, 60℃ Hereinafter, it may be 55°C or less, 50°C or less, 45°C or less, 40°C or less, 35°C or less, or 30°C or less. In addition, specifically, the execution time of the drying step is 2 hours or more, 3 hours or more, 4 hours or more, 5 hours or more, 6 hours or more, 7 hours or more, 8 hours or more, 9 hours or more, or 10 hours or more or 10 hours or less. , 9 hours or less, 8 hours or less, 7 hours or less, 6 hours or less, 5 hours or less, 4 hours or less, 3 hours or less, or 2 hours or less.

In one aspect of the present invention, the method comprises a spraying step, a distribution step, and a drying step of the nano metal catalyst on one surface of the catalyst support, and then the spraying step and the distribution step of the nano metal catalyst on the opposite surface of the catalyst support. , And may be to perform a drying step. Specifically, in one aspect of the present invention, the drying step for one surface may be performed for 3 to 5 hours, and the drying step for the other surface may be performed for 7 to 9 hours.

In one aspect of the present invention, the method may further include removing foreign substances after the drying step.

In one aspect of the present invention, the step of removing foreign substances may be performed by blowing compressed air into the catalyst support.

In one aspect of the present invention, the method further includes preparing a coating slurry including a nano metal catalyst before the spraying step, and the spraying step may be spraying the coating slurry onto the catalyst support.

In one aspect of the present invention, the step of preparing the coating slurry comprises: a) adding methylcellulose to distilled water and stirring at 30 to 50°C for 1 to 3 hours; b) adding bentonite to the slurry of a) and stirring at 30 to 50° C. for 1 to 3 hours; c) It may include adding a nano metal catalyst to the slurry of b) and stirring at 30 to 50° C. for 1 to 3 hours. In one aspect of the present invention, the coating slurry is mixed in a ratio of 15 to 20 wt% of nano metal catalyst, 8 to 12 wt% of bentonite, 1 to 2 wt% of methylcellulose, and 70 to 75 wt% of water based on the total weight of the coating slurry. It may be manufactured.

Hereinafter, the present invention will be described in more detail by describing Examples, Comparative Examples and Experimental Examples. Materials, reagents, costs, operations, and the like shown in the following examples can be appropriately changed without departing from the gist of the present invention. Therefore, the scope of the present invention is not limited by the specific examples shown below.

[Example 1] Preparation of a carbon corrugated filter in which a nano-metal catalyst was sprayed

(1) Preparation of nano metal catalyst powder

The titania particles and manganese oxide used in this example were prepared according to the contents described in [Example 1] of Korean Patent Application No. 10-2012-0076675 or [Example] of Korean Patent Application No. 10-2012-0054254.

Specifically, titanium tetra-iso-propoxide (TTIP; Titanium tetra-iso-propoxide, Ti[OCH(CH ₃ ) ₂ ] ₄ ) manganese acetate (Mn(CH ₃ COO) ₂ ) in a solution It was added to be 5.0% by weight based on the total weight of the precursor. Then, the precursor mixture was put into a bubbler immersed in an oil bath, and the temperature of the bubbler was maintained at 95°C to evaporate. Next, the vaporized precursor mixture was transferred to an alumina tube of an electric furnace using argon (Ar) gas. Together with this, compressed air was supplied to the alumina tube.

At this time, argon (Ar) gas is injected into the alumina tube at a flow rate of 0.7 L/min and compressed air is 7.0 L/min, and the temperature in the alumina tube is maintained at 900°C, _{and manganese dioxide (MnO 2} ) is placed on the surface of _{titania (TiO 2 ).} ) Coated core-shell structure of manganese oxide-titania catalyst was synthesized in a gas phase. Thereafter, the prepared catalyst was cooled to 50° C. in a double tube-type collector through which cooling water flows, and the catalyst particles were collected and recovered at intervals of 2 hours.

(2) Preparation of coating slurry

In order to spray the nano-metal catalyst on the catalyst support, a coating slurry containing such a catalyst was prepared in the order shown in FIG. 1. The coating slurry was prepared by setting a weight ratio based on the weight of the nano metal catalyst. This coating slurry may be prepared in a mixing ratio of 15 to 20 wt% of a metal catalyst, 8 to 12 wt% of bentonite, 1 to 2 wt% of methylcellulose, and 70 to 75 wt% of water.

Specifically, 2 g of methyl cellulose was added to 100 L of pure distilled water, followed by stirring at 40° C. for 2 hours to sufficiently dissolve methyl cellulose in distilled water. After the resulting slurry was sufficiently dissolved, 15 g of bentonite was added in small portions to prevent aggregation, and the viscosity was adjusted by stirring at the same temperature (40° C.) for about 2 hours. To the thus prepared slurry, 25 g of the manganese oxide-titania catalyst prepared in (1) was added and stirred at the same temperature (40° C.) for about 2 hours to prepare a coating slurry.

(3) Spraying the coating slurry on the carbon corrugated paper catalyst support

As shown in FIG. 2, the coating slurry prepared in (2) was sprayed onto the surface of carbon corrugated cardboard (ENGTECH) in the form of the figure in FIG. 3 by spray spraying. The coating slurry sprayed on the carbon corrugated cardboard surface was spread evenly without clumping by using compressed air. Then, the carbon corrugated board was put in a dryer at 60° C. and dried for 4 hours. Likewise, the coating slurry was sprayed on the back side of the dried carbon corrugated cardboard, spread evenly without clumps using compressed air, and then placed in a dryer at 60° C. and dried for 8 hours. In this way, compressed air was blown into the carbon corrugated board coated with a thin film layer containing a nano metal catalyst to remove foreign substances, and a carbon corrugated board filter catalyst having a nano metal catalyst sprayed as shown in FIG. 3 was obtained.

[Comparative Example 1] Preparation of carbon corrugated cardboard filter by dip-coating method

Using the coating slurry prepared in (2), a carbon corrugated cardboard catalyst filter was prepared by dip-coating according to the conventional method.

Specifically, a carbon corrugated board as shown in FIG. 3 was prepared and immersed in the coating slurry for about 10 minutes. After 10 minutes, take out the carbon corrugated cardboard from the catalyst slurry and blow the catalyst slurry in the corrugated cardboard cells using compressed air so that all the catalyst particles do not fly away and the corrugated cardboard cells are secured. Was evenly applied to the carbon corrugated board. When the work was completed and the catalyst slurry was evenly distributed on the carbon corrugated board, it was dried for 2 hours at a temperature of 60°C using a dryer. Thereafter, the method was repeated three more times for the dried carbon corrugated board. After that, the carbon corrugated cardboard with the catalyst slurry was dried overnight (more than 10 hours) while maintaining the internal air temperature of 60 ℃ using a drying furnace (Dryer). Afterwards, the carbon corrugated cardboard with the catalyst removed from the drying furnace was fired in an ^{atmosphere in which air flows for 3 hours at a temperature of 60° C. (heating 10 o} C/min.) using a calciner.

[Comparative Example 2] Preparation of cordierite filter by dip-coating method

Using the coating slurry prepared in (2), a cordierite filter was manufactured by a dip-coating method according to an existing method.

The honeycomb type cordierite support was subjected to a pretreatment of washing the surface using an aqueous nitric acid solution diluted with distilled water before attaching the catalyst using a catalyst slurry. Nitric acid (69.0 to 70.0%) was used as the diluted aqueous nitric acid solution, and 200 mL of silver nitrate was added based on 1 L of distilled water. The aqueous nitric acid solution maintained the water temperature at 100°C. The cordierite support in the form of a honeycomb was soaked in the nitric acid aqueous solution so that all parts were immersed and left for 2 hours. Subsequently, the honeycomb type cordierite extracted from the aqueous solution was washed with distilled water and dried at a temperature of 100° C. for 7 hours using a drying furnace.

A honeycomb-shaped cordierite support (represented as a honeycomb support), which had been pretreated with an aqueous nitric acid solution by the above method, was immersed in the coating slurry prepared in Example 1 for about 10 minutes. After 10 minutes, take out the honeycomb support from the catalyst slurry and blow the catalyst slurry in the support cell using compressed air so that all the catalyst particles do not fly away and the support cell is secured. Were evenly buried on the honeycomb support. When the work was completed and the catalyst slurry was evenly distributed on the honeycomb support, it was dried for 2 hours at a temperature of 100°C using a dryer. Thereafter, the method was repeated three more times for the dried honeycomb support. Thereafter, the honeycomb support with the catalyst slurry was dried while maintaining the internal air temperature of 100°C overnight (more than 10 hours) using a dryer. Subsequently, the honeycomb support with the catalyst removed from the drying furnace was fired in an atmosphere in which air flows for 3 hours at ^{a temperature of 300 o} C (heating 10 ^{o C/min.) using a calciner.}

[Test Example 1] Durability evaluation of carbon corrugated paper filters manufactured in different ways

According to one aspect of the present invention, the durability of Example 1, which is a carbon corrugated paper filter in which a nano metal catalyst is dispersed, and Comparative Example 1, which is a carbon corrugated paper filter manufactured by a dip-coating method, was evaluated. Specifically, durability was evaluated based on how the appearance of the carbon corrugated cardboard filter manufactured by the method described in Examples and Comparative Examples was coated and manufactured, and then its appearance was deformed, and these results are shown in FIG. 3.

According to Figure 3, in the case of the carbon corrugated cardboard manufactured by the spray coating method according to one aspect of the present invention, it was confirmed that the adhesive material between the carbon corrugated boards did not deteriorate in durability, and the corrugated cardboards did not fall apart from each other even after the filter was manufactured to maintain the circle However, in contrast to this, in the case of carbon corrugated cardboard manufactured by the conventional dip-coating method, it can be confirmed that the adhesion durability of the adhesive material is lowered after manufacturing, so that the external structure of the filter is spontaneously destroyed.

Therefore, the catalytic filter according to an aspect of the present invention has an excellent effect of decomposing volatile organic compounds while maintaining the durability of the filter appearance.

[Test Example 2] Measurement of ozone decomposition rate of filters manufactured by different methods

The ozone decomposition rate of the catalyst filters of Example 1 and Comparative Examples 1 and 2 was measured. Specifically, ozone was flowed into the reactor (a cylinder shape with a diameter of 4 cm), and each catalyst filter was placed at the rear end of the reactor to measure the concentration at the front and rear ends of the reactor to measure the decomposition rate. The ozone concentration was set under the condition of 10 ppm, the size of the catalyst filter was a circular shape with an outer diameter of 4 cm and a thickness of 1 cm, and the experiment was conducted at a space velocity of 6,000 1/h under the condition of a flow rate of 1.25 LPM. In the case of Comparative Example 1, which is a carbon corrugated paper filter manufactured by the dip-coating method, as can be seen in Test Example 1, the appearance of the filter was deformed after manufacture, so the ozone decomposition rate could not be measured, and these results are shown in Table 1 below. I got it.

Nano catalyst Filter material Coating method Space speed(1/h) Ozone decomposition rate Mn/CVC Cordierite
(Comparative Example 2) Deep coating 6,000 63% Mn/CVC Carbon Corrugated Paper
(Example 1) Spray coating 6,000 59% Mn/CVC Carbon Corrugated Paper
(Comparative Example 1) Deep coating Not measurable Not measurable

According to the results of Table 1, the carbon corrugated cardboard according to one aspect of the present invention (Example 1) exhibits a similar level of ozone decomposition rate compared to the cordierite filter (Comparative Example 2) manufactured by the conventional dip-coating method. I could confirm that. In the case of the filter prepared by dip-coating the carbon corrugated board of Comparative Example 1, the ozone decomposition rate could not be measured due to the change in the external shape of the filter. Therefore, the filter according to an aspect of the present invention exhibits the same level of ozone decomposition rate compared to that of supporting a nano metal catalyst by dip-coating, from which it has an excellent effect of decomposing volatile organic compounds at low temperatures. It is economical compared to the prior art because the catalyst filter can be produced simply and easily.

[Test Example 3] Microscopic observation result of carbon corrugated board

The surface of the carbon corrugated cardboard catalyst filter prepared in Example 1 was observed using an optical microscope (Olympus, BX51-P) and a scanning electron microscope (Hitachi, S-4100), and these results are shown in FIG. 4.

In FIG. 4, the photo on the left is an observation of the surface of the catalyst filter with an optical microscope, and the photo on the right corresponds to a photo in which the portion indicated by the dotted line in the photo on the left is observed with a scanning electron microscope. According to this picture, since the nano-metal catalyst is evenly sprayed on the surface of the corrugated cardboard, it can be confirmed that the catalyst filter according to an aspect of the present invention contains the nano-metal catalyst with high dispersibility. Accordingly, the catalyst filter according to an aspect of the present invention is easily manufactured at a low temperature, and corresponds to an excellent ozone decomposition rate while maintaining a high specific surface area.

[Test Example 4] Experimental Results of Physical Characteristics of Carbon Corrugated Cardboard

In order to find out the physical properties of the catalyst filter manufactured according to Example 1, the following experiment was performed.

The diameter and weight of the prepared catalyst of Example 1 were measured. The catalyst filter had a diameter of 4 cm and an area of 12.56 cm ² . The weight of the filter material itself before coating was 1.87 g, and the weight of the filter after coating was 2.35 g, and the weight of the coated catalyst was 0.48 g. According to this, it can be seen that the weight of the catalyst corresponds to about 20 wt% based on the weight of the filter.

In addition, when the coating rate per unit area was calculated, a value of ^{382.16 g/m 2 was obtained.}

Claims (18)

A catalyst filter comprising a catalyst support and a manganese oxide-titania catalyst sprayed on the surface of the catalyst support,
The manganese oxide-titania catalyst is included in the coating slurry, and the coating slurry is sprayed onto the catalyst support,
The coating slurry is mixed in a ratio of 15 to 20 wt% of the manganese oxide-titania catalyst, 8 to 12 wt% of bentonite, 1 to 2 wt% of methylcellulose, and 70 to 75 wt% of water, based on the total weight of the coating slurry,
The manganese oxide-titania catalyst is a catalyst in which manganese oxide is supported on titania particles, and has a specific surface area of 200 m 2 /g to 300 m 2 /g,
In the catalyst filter, the weight of the manganese oxide-titania catalyst per unit area is 300 g/m ² to 450 g/m ² .
The method of claim 1,
The manganese oxide-titania catalyst is a catalyst filter that is spray-coated on the surface of the catalyst support.
The method of claim 1,
The manganese oxide-titania catalyst is sprayed on the surface of the catalyst support to form a thin film layer.
The method of claim 1,
The catalyst support is paper, cotton, or ceramics.
The method of claim 4,
The catalyst support is from the group consisting of carbon paper, corrugated type carbon paper, carbon cloth, carbon felt, fibrous fabric paper, cellulose pulp paper, non-woven fabric, honeycomb paper filter, and cordierite. One or more catalyst filters selected.
The method of claim 1,
The manganese oxide-titania catalyst is a catalyst filter of 15% to 30% by weight based on the weight of the catalyst filter.
delete A method for producing a catalyst filter according to any one of claims 1 to 6, comprising an injection step of spraying a manganese oxide-titania catalyst onto the surface of the catalyst support,
Before the spraying step, further comprising the step of preparing a coating slurry containing the manganese oxide-titania catalyst,
The coating slurry is mixed in a ratio of 15 to 20 wt% of the manganese oxide-titania catalyst, 8 to 12 wt% of bentonite, 1 to 2 wt% of methylcellulose, and 70 to 75 wt% of water, based on the total weight of the coating slurry,
In the spraying step, the coating slurry is sprayed onto the catalyst support,
The manganese oxide-titania catalyst is a catalyst in which manganese oxide is supported on titania particles, and has a specific surface area of 200 m 2 /g to 300 m 2 /g,
In the catalyst filter, the weight of the manganese oxide-titania catalyst per unit area is 300 g/m ² to 450 g/m ² .
The method of claim 8,
Spraying is a method of manufacturing a catalyst filter using a spray coating method.
The method of claim 8,
The method further comprising a distribution step of evenly spreading the manganese oxide-titania catalyst on the surface of the catalyst support after the spraying step.
The method of claim 10,
The distribution step is a step of evenly spreading the manganese oxide-titania catalyst on the surface of the catalyst support using compressed air.
The method of claim 8,
A method of manufacturing a catalyst filter further comprising a drying step of drying the catalyst support after the spraying step.
The method of claim 12,
The drying step is a method of manufacturing a catalyst filter performed for 2 to 10 hours at a temperature of 40 to 70°C.
The method of claim 12,
A method of manufacturing a catalyst filter further comprising removing foreign substances after the drying step.
The method of claim 14,
The step of removing foreign substances is a method of manufacturing a catalyst filter, which is performed by blowing compressed air into the catalyst support.
The method of claim 8,
The method includes performing an injection step, a distribution step, and a drying step of a manganese oxide-titania catalyst on one surface of the catalyst support, and then an injection step, a distribution step, and a drying step of the manganese oxide-titania catalyst on the opposite surface of the catalyst support. How to do.
The method of claim 16,
A method of manufacturing a catalyst filter, wherein the drying step for one surface is performed for 3 to 5 hours, and the drying step for the other surface is performed for 7 to 9 hours.
The method of claim 8,
The step of preparing the coating slurry includes: a) adding methylcellulose to distilled water and stirring at 30 to 50°C for 1 to 3 hours; b) adding bentonite to the slurry of a) and stirring at 30 to 50° C. for 1 to 3 hours; c) A method comprising adding a manganese oxide-titania catalyst to the slurry of b) and stirring at 30 to 50° C. for 1 to 3 hours.

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