JPH07204442A - Honeycomb deodorizing material - Google Patents

Abstract

PURPOSE:To provide a honeycomb deodorizing material having good contact efficiency and high deodorizing capacity, capable of being more enhanced in deodorizing capacity by widely covering a deodorizing range with respect to various malodorous and optimum even to the deodorizing of a local space producing a malodor. CONSTITUTION:A honeycomb deodorizing material 1 is constituted by packing the cell spaces 2a of a low pressure loss type honeycomb deodorizing base material 2 with a deodorizing material 3 composed of material quality different from that of the honeycomb deodorizing base material 2. This honeycomb deodorizing material is improved in the contact efficiency with air and becomes favorable even in the deodorizing of a local space producing a malodor. The constitutional material of the honeycomb deodorizing base material 2 and the deodorizing material 3 is composed of one of an inorg. deodorizing material, an org. deodorizing material and an activated carbon material or a combination of two or more kinds of them. A deodorizing range to various malodors becomes wide and the enhancement of capacity to a composite malodor and the prevention of the re-discharge of a malodor are achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a honeycomb deodorizing material used for purifying air, particularly for removing a bad odor at home or in a vehicle.

[0002]

2. Description of the Related Art Conventionally, purification of air by solid materials,
As a method for removing malodor, physical deodorization: a method of reversibly physically adsorbing malodorous molecules to the fine structure of a porous material such as an inorganic deodorant (zeolite, silica, alumina) or activated carbon, chemical deodorization: solid Acid-base reaction with malodorous molecules on the surface, addition reaction, polymerization reaction, by introducing a functional group that causes a chemical reaction such as ionic bond, a method of removing by reacting irreversibly with malodorous molecules in the air, ozone Deodorizing catalyst ... After adsorbing malodorous molecules on the active sites on the catalyst surface,
A method of passing ozone over the surface, decomposing ozone at active points, and oxidatively decomposing malodorous molecules by utilizing the oxidizing property of ozone, combustion oxidation catalyst .... Heat to 200-400 ° C,
Various methods such as a method of utilizing oxygen in the air to cause a catalytic reaction accompanied by oxidative decomposition have been proposed. As the shape of these solid materials, powder and granular deodorizing materials have been conventionally used in the form of moving beds and fixed beds. Further, in recent years, a device for reducing the pressure loss of air has been devised by using a deodorizing material formed in a honeycomb shape. This honeycomb-shaped compact has less pressure loss than conventional powder and granular deodorant materials used in moving bed and fixed bed form, and is excellent in handling during assembly and replacement. (For example, Japanese Patent Laid-Open No. 2-126856)
(See the official gazette).

[0003]

However, the conventional honeycomb molded body has the advantages of low pressure loss and excellent handling, but on the other hand, the contact efficiency between air and the surface of the honeycomb molded body is low. It is lower than conventional powder and granular deodorizing materials, and there is a problem that the efficiency of removing malodor decreases. Moreover, the processing capacity of the ordinary honeycomb-shaped molded body is extremely reduced when it exceeds a certain space velocity SV [= processing air volume (L / hr) / honeycomb capacity (L)], so that deodorization of a local space where a bad odor occurs But there was a disadvantage.
In addition, the conventional honeycomb-shaped molded body has a narrow deodorizing range due to restrictions in terms of composition. For example, even if the alkaline malodor has a deodorizing effect, the acidic malodor has no deodorizing effect.

The present invention has been made in view of the above-mentioned conventional problems, and its object is to achieve good deodorizing performance by providing good contact efficiency with air and covering a wide deodorizing range against various malodors. In order to provide a high-performance honeycomb deodorizing material, which can further improve the performance, improve the performance against complex odors and prevent re-emission of malodors, and can also be optimally used for deodorizing local spaces where malodors occur. is there.

[0005]

In order to solve the above conventional problems, the present invention provides a honeycomb deodorizing base material 2 having a cell space 2a and a honeycomb deodorizing base material 2 which is filled in the cell space 2a. A deodorizing material 3 made of a material different from the deodorizing base material 2 is provided, and each constituent material of the honeycomb deodorizing base material 2 and the deodorizing material 3 is one selected from an inorganic deodorizing material, an organic deodorizing material, and an activated carbon material or It is characterized by being composed of a combination of two or more kinds.

The respective constituent materials of the honeycomb deodorizing base material 2 and the deodorizing material 3 are composed of one or a combination of two or more selected from ozone deodorizing catalysts, inorganic two deodorizing materials, organic deodorizing materials and activated carbon materials. Is preferred. The constituent materials of the honeycomb deodorizing base material 2 and the deodorizing material 3 are preferably composed of one or a combination of two or more selected from a combustion oxidation catalyst, an inorganic deodorizing material, and an activated carbon material.

The deodorizing material 3 preferably has a shape of one kind or a combination of two or more kinds selected from powdery, granular and fibrous shapes.

[0008]

According to the present invention, the honeycomb deodorizing material 1 is placed in the cell space 2a of the honeycomb deodorizing base material 2 in the honeycomb deodorizing base material 2.
The deodorizing material 3 is made of a material different from the above material, and each of the constituent materials of the honeycomb deodorizing base material 2 and the deodorizing material 3 is
It is composed of one kind or a combination of two or more kinds selected from inorganic deodorant, organic deodorant and activated carbon material.

Here, as the inorganic deodorant, a material in which zinc oxide is mixed in cordierite composition and burned and then zinc chloride is added, a material based on alumina-silica, or a porous inorganic material such as zeolite is used. Examples include deodorant materials of the system. Examples of the organic deodorant include various plant extracts and organic deodorants obtained by impregnating and adhering a solid substance with an organic compound effective for deodorization. Further, examples of the activated carbon material include activated carbon including fibrous activated carbon.

In this way, by filling the cell space 2a of the low pressure loss type honeycomb deodorizing base material 2 with the deodorizing material 3 made of a material different from that of the honeycomb deodorizing base material 2, air and the honeycomb deodorizing base material 2, The contact efficiency with the deodorizing material 3 is improved, and the deodorizing performance can be improved. Moreover, even if the space velocity exceeds a certain value, the contact efficiency does not extremely decrease, and it can be conveniently used for deodorizing the local space where a bad odor is generated. Furthermore, since the honeycomb deodorizing base material 2 and the deodorizing material 3 are made of different materials, a wide deodorizing range can be covered against various kinds of bad odors, and the deodorizing performance can be further improved. It is possible to prevent the re-emission of a bad smell.

Further, the honeycomb deodorizing base material 2 and the deodorizing material 3
Each constituent material of is selected from one or a combination of two or more selected from ozone deodorizing catalyst, inorganic deodorizing material, organic deodorizing material, activated carbon material, or combustion oxidation catalyst, inorganic deodorizing material, activated carbon material. One kind or a combination of two or more kinds is preferable. Here, MnO is used as the ozone deodorizing catalyst.
_In addition to ₂ , TiO ₂ , metal oxides such as Ag, Au, Pt, Pd, C, noble metals, carbon, etc. may be mentioned, and any ozone deodorizing catalyst having catalytic activity may be used. Examples of the combustion oxidation catalyst include noble metals such as Pt, Pd, Ag, Au and the like, and any combustion oxidation catalyst having catalytic activity may be used, and it is particularly desirable that the oxidation activation temperature is low. The inorganic deodorant, the organic deodorant, and the activated carbon material are the same as those described above. As described above, by combining with the ozone deodorizing catalyst or with the combustion oxidizing catalyst, it becomes possible to provide a honeycomb deodorizing material with higher performance.

Table 1 shows examples of combinations of the constituent materials of the honeycomb deodorizing base material 2 and the deodorizing material 3.
(Below margin)

[0013]

[Table 1]

In Table 1, the honeycomb deodorizing base material 2 and the deodorizing material 3 are made of different materials. For example, when the honeycomb deodorizing base material 2 is an inorganic deodorizing material, the deodorizing material is an inorganic deodorizing material. Materials other than the deodorizing material (for example, organic deodorizing material, activated carbon material, ozone deodorizing catalyst, combustion oxidation catalyst) are selected.
In this way, by combining different kinds of materials, a wide deodorizing range can be covered for various malodors, and the deodorizing effect for each malodor is improved.

The shape of the deodorizing material 3 is preferably one or a combination of two or more selected from powdery, granular and fibrous shapes. Each of the powder, granular, and fibrous shapes has a large surface area, and by filling the cell space 2a of the low-pressure loss type honeycomb deodorizing base material 2 with the deodorizing material 3 having these shapes, the contact efficiency with air can be further improved. Can be improved.

[0016]

EXAMPLES The present invention will be described in detail below with reference to examples. FIG. 1 shows the structure of the honeycomb deodorizing material 1 including the honeycomb deodorizing base material 2 and the deodorizing material 3. In the figure, a large number of cell spaces 2a of the honeycomb deodorizing base material 2 are filled with the deodorizing material 3 different from the honeycomb deodorizing material 1. At this time, in order to prevent the deodorizing material 3 from flowing out, it is desirable that a filtering material such as a non-woven fabric 4 is provided at the entrance and exit of the cell space 2a. In order to further improve the deodorizing performance, as shown in FIG. 2, one honeycomb deodorizing base material 2 may be filled with a plurality of types of deodorizing materials 3A, 3B, 3C, 3D. The deodorizing performance can be expressed in a wider range. (Examples 1 and 2) Z was added to an inorganic material having a cordierite composition.
A base material containing 20% of nO was extruded into 60 cells / inch ² and fired at 750 ° C., 90 mm × 90 mm ×
A 30 mm honeycomb molded body was obtained. Further, this honeycomb-shaped molded body was impregnated with a 25% zinc chloride aqueous solution and then dried at 70 ° C. for 2 hours to prepare an inorganic honeycomb deodorizing base material.
Next, a non-woven fabric is attached to the end face of the inorganic honeycomb deodorizing base material on the cell outlet side as a filter material for preventing outflow, and thereafter, 20 g of granular activated carbon (average particle size 0.5 mm, specific surface area 1000 m) from the cell inlet in the opposite direction. ² / g) was uniformly filled in each cell space, and then a non-woven fabric was attached to the cell outlet to form Example 1.

On the other hand, 10 g of fibrous activated carbon (pitch diameter: 15) was introduced from the cell inlet of the honeycomb deodorizing base material prepared in Example 1.
Example 2 was one in which each cell space was uniformly filled with a length of mm and a specific surface area of 1500 m ² / g. The deodorizing rate of the honeycomb deodorizing materials obtained in Examples 1 and 2 was measured using a deodorizing rate measuring device 4 shown in FIG. Offensive odor source 5
A sidestream smoke of cigarette (mild seven) is generated in the sample, the sample 7 of each of the first and second examples is installed in the sample storage column 6, and suction is performed by the air pump 8 to form a flow channel system. Before and after the sample 7, the odor sensor was used to measure the deodorization rate of the sample 7 by the malodor analysis in and the malodor analysis out. The deodorization rate was calculated by the following formula.

Deodorization rate = [(Odor analysis in value-Odor analysis out
(Value) × 100 / insoluble odor analysis in value] Further, as a comparison of deodorizing performance, Comparative Examples 1 and 2 are combinations of a honeycomb deodorizing base material, granular activated carbon and fibrous activated carbon in series. Table 2 below shows the measurement results of Examples 1 and 2 and Comparative Examples 1 and 2. The measurement condition is SV = 5000
0, at room temperature.

[0019]

[Table 2]

(Examples 3 and 4) Powdered activated carbon was used as a raw material, to which phenol resin, clay and the like were added, and extrusion molding was performed at 60 cells / inch ² , and then steam activation at 850 ° C. was performed to obtain 950.
An activated carbon honeycomb of m ² / g was prepared (90 mm × 90
mm × 25 mm). A non-woven fabric was attached to the end surface of the activated carbon honeycomb, and 10 g of granular activated carbon for ammonia deodorization (average particle size 0.3 mm) and 10 g of granular activated carbon for acetaldehyde deodorization (average particle size 0.3 mm) were mixed together. Example 3 was one in which the cell space was uniformly filled.

On the other hand, the activated carbon honeycomb prepared in Example 3 was uniformly filled with 5 g of fibrous activated carbon, and then hot light extract of pine, citric acid, glycerin, etc. was added to the fluorite (0.5 mm diameter) as an aqueous solution. After impregnation, 10 g of the air-dried deodorizing material was uniformly filled in each cell space, which was set as Example 4.
The deodorizing rates of the honeycomb deodorizing materials obtained in Examples 3 and 4 were measured using the deodorizing rate measuring device shown in FIG.
A mixture of stool headspace gas and sidestream smoke of cigarettes (mild seven) was used as the malodor source 5. As the evaluation, the odor analysis out portion in FIG. 3 was sampled in a Tedlar pack, and judged by a six-stage odor intensity display method by 10 panelists. For comparison at this time, the materials of Examples 3 and 4 were evaluated in the form of being arranged in series. The measurement results of Examples 3 and 4 and Comparative Examples 3 and 4 are shown in Table 3 below.

[0022]

[Table 3]

(Example 5) Ozone deodorizing catalyst honeycomb (200 cells / inch ² , 50) having MnO ₂ as catalytic activity
(mm × 48 mm × 48 mm) filled with 12 g of fibrous activated carbon in each cell space was set as Example 5. At this time,
As the malodor generating source 5, headspace gas was used in which raw garbage discharged from an ordinary household was left at 35 ° C. and 70% RH for 3 days. The odor intensity of the original odor at this time was 5 (average value of 10 panelists) by the 6-step odor intensity display method. In the measurement experiment, ozone was generated from the ozone generator 13 using creeping discharge upstream of the sample 7 of the deodorizing rate measuring device shown in FIG.

Further, the sample SV = 28,000 hours is 1
It was adjusted to generate ppm ozone. Under this condition, the odor intensity was evaluated by collecting the odor in the odor bag in the odor analysis out at SV = 125,000 hours by 10 panelists, and the measurement results shown in Table 4 below were obtained. In addition, for the odor collection, after the ozone decomposition treatment, sampling was performed in a state where ozone generation was stopped, and Example 5 was used as Comparative Example 5.
The above materials were arranged in series. (Examples 6 and 7) Activated carbon honeycomb 60 used in Example 3
Example 6 was a case where 10 g (0.7 mm particle size) of a granular oxidation catalyst containing Pt as a catalytically active component was uniformly filled in each cell space of the cell / inch ² . Then, at the time of evaluation, the portion of the sample 7 of the deodorization rate measuring device of FIG. 3 was heated by the heater 11 to about 120 ° C.

Further, Pt of 130 cells / inch ² ,
A honeycomb-shaped oxidation catalyst (90 containing Au as a catalytically active component)
(mm × 90 mm × 25 mm) with 9 g of fibrous activated carbon filled in each cell space was set as Example 7. At the time of evaluation, the portion of the sample of the deodorizing rate measuring device of FIG.
To about 120 ° C. Example 6,
7, the space velocity SV was evaluated as 18,000. In addition, the same odor source as in Example 5 was flown in, and after heating and cooling, fresh odorless air was again introduced into the sample, and the same measurement as in Example 5 was performed. Further, for comparison, the materials of Examples 6 and 7 were arranged in series and evaluated. Table 4 below shows the measurement results of Examples 5, 6 and 7 and Comparative Examples 5, 6 and 7. (Below margin)

[0026]

[Table 4]

[0027]

As described above, according to the first aspect of the invention, the honeycomb deodorizing material is formed by filling the cell space of the honeycomb deodorizing base material with a deodorizing material made of a material different from that of the honeycomb deodorizing base material, Since each constituent material of the honeycomb deodorizing base material and the deodorizing material is one kind or a combination of two or more kinds selected from an inorganic deodorizing material, an organic deodorizing material, and an activated carbon material, air and a honeycomb deodorizing base material and a deodorizing material are used. The contact efficiency is improved, the deodorizing performance is improved, and it can be optimally used for deodorizing a local space where a bad odor is generated. In addition, since it is possible to cover a wide range of deodorization against various bad odors and further improve the deodorization performance, it is possible to improve the performance against complex odors and prevent the re-emission of bad odors. can get.

In the second aspect of the present invention, the constituent materials of the honeycomb deodorizing base material and the deodorizing material are one kind or a combination of two or more kinds selected from an ozone deodorizing catalyst, an inorganic deodorizing material, an organic deodorizing material and an activated carbon material. In the invention according to claim 3, the constituent materials of the honeycomb deodorizing base material and the deodorizing material are one or a combination of two or more selected from a combustion oxidation catalyst, an inorganic deodorizing material, and an activated carbon material. In the case of as well, a higher performance honeycomb deodorizing material can be obtained.

According to the fourth aspect of the present invention, the shape of the deodorizing material is one or a combination of two or more selected from powdery, granular and fibrous shapes. Therefore, the surface area of the deodorizing material becomes large. The contact efficiency with air can be further improved, and the deodorizing performance can be further improved.

[Brief description of drawings]

FIG. 1 (a) is a schematic view of a honeycomb deodorizing material according to an embodiment of the present invention as seen from the front, and FIG. 1 (b) is a schematic view of a portion of the honeycomb deodorizing material as seen obliquely.

FIG. 2A is a schematic view of a honeycomb deodorizing material according to another embodiment of the present invention as seen from the front, and FIG. 2B is a schematic view of a portion of the honeycomb deodorizing material as seen obliquely.

FIG. 3 is a schematic view of the above deodorizing rate measuring device.

[Explanation of symbols]

 1 Honeycomb deodorizing material 2 Honeycomb deodorizing base material 2a Cell space 3 Deodorizing material

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B01D 46/00 302 7446-4D 53/38 53/81 53/86 ZAB B01J 20/28 A 23 / 34 A 23/42 A B01D 53/36 ZAB H

Claims (4)

[Claims] 1. A cell space of a honeycomb deodorizing base material is filled with a deodorizing material made of a material different from that of the honeycomb deodorizing base material, and each constituent material of the honeycomb deodorizing base material and the deodorizing material is an inorganic deodorizing material or an organic deodorizing material. A honeycomb deodorizing material comprising one or a combination of two or more selected from a system deodorizing material and an activated carbon material. 2. The honeycomb deodorizing base material and the deodorizing material are composed of one or a combination of two or more selected from an ozone deodorizing catalyst, an inorganic deodorizing material, an organic deodorizing material, and an activated carbon material. The honeycomb deodorizing material according to claim 1. 3. The honeycomb deodorizing base material and the deodorizing material are composed of one or a combination of two or more selected from a combustion oxidation catalyst, an inorganic deodorizing material and an activated carbon material. The described honeycomb deodorizing material. 4. The deodorizing material is formed of one kind or a combination of two or more kinds selected from powdery, granular and fibrous shapes, and the deodorizing material has a shape. The described honeycomb deodorizing material.