JP2001327861A - Tar adsorbent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adsorbent capable of adsorbing tar contained in gas. SOLUTION: The tar adsorbent for adsorbing tar contained in gas comprises at least one selected from the group comprising alumina and silicon dioxide. The alumina is, e.g. activated alumina. Tar that can be adsorbed by the adsorbent is usually derived from at least one of unburned hydrocarbon and carbon monoxide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an adsorbent, particularly to a tar adsorbent.

[0002]

2. Description of the Related Art Exhaust gas generated when incinerating waste such as industrial waste and general household waste includes:
Various environmental pollutants such as dust and dioxins are contained, and when these are collected or removed, a filter is usually used.

When the exhaust gas contains a large amount of unburned hydrocarbons or carbon compounds such as carbon monoxide in addition to the above-mentioned dust and environmental pollutants, the exhaust gas contains Tar derived from the carbon compound is easily generated. The tar often dissolves environmental pollutants in the exhaust gas and takes them into the interior, and may pass through the filter in such a state. For this reason, when such tar is generated in the exhaust gas, it becomes substantially difficult to collect and remove environmental pollutants without leakage using a filter.

An object of the present invention is to provide an adsorbent capable of adsorbing tar contained in a gas.

[0005]

The tar adsorbent of the present invention is for adsorbing tar contained in a gas and comprises at least one selected from the group consisting of alumina, zeolite and silicon dioxide. . Here, the alumina is, for example, activated alumina. The zeolite is, for example, an artificial zeolite. Further, the tar to which the adsorbent can adsorb is usually derived from at least one of unburned hydrocarbons and carbon monoxide.

[0006]

DETAILED DESCRIPTION OF THE INVENTION The tar adsorbent of the present invention comprises at least one selected from the group consisting of alumina, zeolite and silicon dioxide (silica).
That is, the tar adsorbent may be composed of one of alumina, zeolite and silicon dioxide, or may be a combination of two or more of these.

The alumina used here is various known ones and is not particularly limited, but usually activated alumina is preferred. Preferred activated alumina is, for example, heat-treated alumina, preferably 300 to 450 ° C.
It is obtained by heat treatment to a certain degree.

The zeolite has a general formula of X _m Y _n O _2n.
This is a hydrous aluminosilicate represented by sH ₂ O. In the general formula, X represents Na, Ca or K, Y represents Si + Al, and s is undefined. As such zeolites, various types of natural zeolites, synthetic zeolites and artificial zeolites are known, and in the present invention, it is preferable to use artificial zeolites.

The artificial zeolite is a zeolite synthesized using coal ash or the like as a raw material, and is distinguished from a synthetic zeolite manufactured using a raw material such as pure silicic acid or aluminum hydroxide. Artificial zeolites contain intermediates that have not been converted into zeolites and organic substances such as activated carbon, and the content and crystallinity of pure zeolites are intermediate between synthetic zeolites and natural zeolites. Artificial zeolites are generally less expensive than natural zeolites and less expensive than synthetic zeolites, but due to the impurities (eg, intermediates and unburned carbon) contained, artificial zeolites have poor adsorption performance and surface acidity. It has specific characteristics different from those of synthetic zeolites and natural zeolites. For example, the cation exchange capacity of an artificial zeolite is usually about the same as or about three times that of a natural zeolite.

As the artificial zeolite, a commercially available one may be used, but one manufactured from fly ash is advantageous in terms of cost. As fly ash, it is preferable to use incinerated ash such as coal or pulp in that it does not contain miscellaneous impurities,
Other incineration ash from general waste and industrial waste can also be used. When an artificial zeolite is manufactured using such fly ash, first, fly ash having a small particle size and an aqueous sodium hydroxide solution (normality = 2.5 to 3.5 N) are mixed at 90 ° C.
The reaction is carried out for about 12 to 28 hours. When the powder obtained by such a reaction step is washed with water and dried, an Na-type artificial zeolite is obtained. Thereafter, the Na type artificial zeolite and calcium chloride are further reacted for about 2 hours to replace Na with Ca, and the resulting powder is washed with water and dried to obtain a Ca type artificial zeolite. In addition, as artificial zeolite, P
b-type artificial zeolite, Ag-type artificial zeolite and Mg
Artificial zeolite may be used, but in the present invention, Ca-type zeolite is most preferably used from the viewpoint of safety and cost.

The form of the tar adsorbent of the present invention is not particularly limited. That is, the tar adsorbent may have various shapes such as a particle shape and a fibrous shape as long as it is selected from the group consisting of the above-mentioned alumina, zeolite and silicon dioxide. Further, a mixture of two or more shapes such as a mixture of a particulate material and a fibrous material may be used.

[0012] The tar adsorbent of the present invention is generally used for exhaust gas and tobacco smoke generated in various combustion engines such as an incineration facility for incinerating waste such as industrial waste and general household waste and an internal combustion engine. Tar, particularly unburned hydrocarbons and carbon compounds such as carbon monoxide, more specifically derived from at least one of unburned hydrocarbons and carbon monoxide It is used to adsorb tars that form. In this case, the tar adsorbent of the present invention is usually applied to a porous base material (filter) having gas permeability, such as exhaust gas, which can pass therethrough. When the filter is arranged in an airflow such as exhaust gas, the filter can effectively adsorb tar contained therein and remove tar components from the airflow.

The amount of the tar adsorbent of the present invention to be applied to the above-mentioned filter is not particularly limited. However, usually, the amount of the tar adsorbent is considered in consideration of the relation between the tar adsorption effect and the pressure loss of the filter. It is preferable to set appropriately.

Next, an example of a specific method of using the tar adsorbent of the present invention will be described. FIG. 1 shows a schematic configuration of a chlorinated organic compound collecting apparatus employing a tar adsorbent according to the present invention. In addition, this sampling device quantitatively analyzes chlorinated organic compounds such as dioxins and coplanar PCBs contained in exhaust gas generated in incineration facilities for incinerating waste such as industrial waste and general household waste. This is for collecting a sample for qualitative analysis, and is based on Japanese Industrial Standard JIS K 0 established on September 20, 1999.
311: As a simple sampling device that replaces a complicated sample gas sampling device equipped with a glass impinger, an adsorbent such as XAD-2, etc. as exemplified in "Method for measuring dioxins and coplanar PCB in exhaust gas" in 1999. ,
This has been previously proposed by the present applicant in Japanese Patent Application No. 2000-88061.

In FIG. 1, a sampling device 1 mainly includes a sampling tube 2, a sampling device 3, and a suction device 4. The sampling tube 2
For example, it is made of borosilicate glass or transparent quartz glass, and the exhaust gas (sample gas) passing through it
Has a cooler 5 for cooling.

FIGS. 2, 3 (longitudinal sectional view of FIG. 2) and FIG.
The details of the sampling device 3 will be described with reference to (a sectional view taken along line IV-IV in FIG. 2). In the figure, the sampler 3 is a holder 6,
A sampling filter 7 for capturing and collecting a chlorinated organic compound contained in the sample gas, which is arranged in the holder 6, and a sample gas transported via the sampling pipe 2 are placed in the sampling filter 7. The apparatus mainly includes an introduction tube 8 for introduction and a mounting body 9 for attaching the introduction tube 8 to the holder 6.

The holder 6 is a substantially cylindrical container made of transparent glass, and has a main body 10 capable of accommodating the sampling filter 7 and a mounting portion 11 for mounting the mounting body 9.
And a discharge section 12 for discharging the sample gas. The mounting section 11 is provided integrally with an end of the main body section 10 and has a smaller diameter than the main body section 10. The mounting portion 11 has a spiral groove 11a formed on the outer peripheral surface, and has an opening 11b at an end.

The discharge section 12 is provided integrally with the other end of the main body section 10 and has a discharge path 12a for discharging the sample gas to the outside and a branch path 12b. The branch path 12b is provided with a thermometer 27 such as a thermometer or a thermocouple for measuring the temperature of the sample gas passing through the discharge section 12 (FIG. 1).
Is inserted into the discharge unit 12.

The sampling filter 7 is a cylindrical porous molded body having one end closed and having an opening 7a at the other end for introducing a sample gas, that is, a porous cylindrical filter. The closed end side is inserted into the main body 10 of the holder 6 from the opening 11b while the 7a side is supported by the mounting body 9. The size of the collection filter 7 is not particularly limited, but it is usually 5 mm in length.
0 to 150 mm, outer diameter 12 to 35 at the end on the opening 7a side
mm, closed end side outer diameter 10-30mm, thickness 1-10m
m, and has a tapered shape in which the outer diameter on the closed end side is set smaller than the outer diameter on the end portion on the opening 7a side. The details of the collection filter 7 will be described later.

The introduction tube 8 is a tubular member made of glass similarly to the holder 6, and is detachable from the opening 7a of the sampling filter 7. That is, the introduction pipe 8
Is a connecting portion 13 for connecting the end of the collection tube 2 to one end.
In addition, the other end penetrates the mounting body 9 and is removably inserted into the opening 7 a of the sampling filter 7.

The mounting body 9 includes a first support 14 for supporting the sampling filter 7 in the holder 6 and a second support 15 for mounting the introduction tube 8 to the first support 14.
And The first support 14 is a resin or metal member, and has a hole 14 a for supporting an end of the sampling filter 7 on the opening 7 a side. Hole 14
A spiral groove 14b is formed on the inner peripheral surface of a. First
The support 14 is screwed into the spiral groove 11a on the mounting portion 11 side of the holder 6 by the spiral groove 14b. Further, the first support 14 has a protruding portion 16 protruding leftward in FIG. The protruding portion 16 has a through hole 16a into which the distal end of the introduction tube 8 can be inserted, and a spiral groove 16b is formed on the outer peripheral surface.

On the other hand, the second support 15 is
A member made of resin or metal, which is formed like a lid having a spiral groove 15a formed on the inner peripheral surface thereof, and has a through hole 15b for inserting the introduction pipe 8 therein. The second support 15 is provided with a spiral groove 15a in a state where the introduction tube 8 is inserted into the through hole 15b.
6 is screwed into the spiral groove 16b.

The collecting filter 7 mounted on the collecting device 3 can be removed from the holder 6.
In this case, the second support 15 of the mounting body 9 is connected to the first support 1
4 and the introduction tube 8 is removed from the sampling filter 7. When the first support 14 is removed from the holder 6, the sampling filter 7 is taken out of the holder 6 while being supported by the first support 14.

The suction device 4 includes an exhaust passage 20 and a suction device 21.
And One end of the exhaust passage 20 is connected to the discharge passage 12 a of the sampling device 3 using a tubular joint 22, and the cooling device 23 and the trap 2 are sequentially arranged from the sampling device 3 side.
4 in this order. The suction device 21 is attached to the other end of the exhaust passage 20, and has a suction pump 21a and a gas meter 21b in this order. The suction pump 21a has a flow rate adjusting function and can be used continuously for 24 hours or more. In addition, the gas meter 21b
For measuring the flow rate of the sample gas,
It can measure a range of 範 囲 40 l / min up to 0.1 l / min.

Next, details of the collecting filter 7 used in the above-mentioned collecting device 3 will be described. The collection filter 7 is formed of a porous body having air permeability formed using a fiber material, and the tar adsorbent of the present invention is added to the porous body.

Here, the fiber material forming the porous body is:
Dioxins, their precursors and various chlorinated organic compounds such as coplanar PCBs do not substantially react chemically with, for example, fibrous activated carbon, carbon fiber, glass fiber, alumina fiber, silica fiber and Teflon (registered trademark) ) Fibers. Each of these fiber materials may be used alone, or two or more of them may be used in combination. The fiber diameter and specific surface area of the fiber material are not particularly limited.

The porosity of the porous body made of the above fiber material is usually preferably set to 80% or more and less than 100%, and more preferably set to 90% or more and less than 100%. When the porosity is less than 80%, it may be difficult to efficiently extract the chlorinated organic compound captured and collected by the collection filter 7 in a short time in an analysis operation described below. Here, the porosity is a value obtained from the bulk density (g / cm ³ ) and the true specific gravity (g / cm ³ ) of the porous body according to the following formula.

[0028]

(Equation 1)

Such a porous body is usually prepared by mixing the above-mentioned fiber material with a binder, and molding the resulting mixture into the above-mentioned predetermined cylindrical shape, that is, a cylindrical shape having one end closed. can get. In addition, as a binder, a cellulose-based binder can be used, for example.

In such a collecting filter 7,
The tar adsorbent of the present invention is impregnated into the above-mentioned porous body. As a method for impregnating the porous body with the tar adsorbent, for example, a dispersion in which the tar adsorbent is uniformly dispersed in water is prepared, and the porous body is immersed in the dispersion. A method of drying or sintering can be adopted. In addition, as a drying or sintering method,
It is preferable to employ a method of removing water by heating the porous body at about 150 to 600 ° C. In particular, when alumina is used as the tar adsorbent, it is preferable to set the heat treatment temperature of the porous body to 300 to 450 ° C. since the effect of activating the alumina is exhibited.

Usually, the amount of the tar adsorbent applied to the porous body is preferably set at 10 to 150% by weight, more preferably at 40 to 100% by weight of the weight of the porous body. preferable. 1 tar adsorbent applied
If the content is less than 0% by weight, a part of the tar contained in the sample gas may pass through the sampling filter 7, and as a result, various chlorinations dissolved in the passed tar may occur. There is a possibility that the organic compound is discharged to the outside without being collected by the collection filter 7. Conversely, 15
If the content exceeds 0% by weight, the collection filter 7 may increase the pressure loss when capturing particulate matter contained in the sample gas, and the porosity of the porous body may decrease. There is a risk of lowering the extraction rate in the extraction operation performed.

Next, a method for collecting a chlorinated organic compound using the above-mentioned collecting apparatus 1 will be described. Here, a sample gas is sampled from the exhaust gas flowing in the space of an incineration facility for incineration of waste, for example, a flue, and various chlorinated organic substances such as dioxins and coplanar PCB contained in the sample gas are collected. The case of collecting a compound will be described. In this case, as shown in FIG. 1, the tip of the sampling pipe 2 of the sampling device 1 is connected to a sampling port 25 a provided in the flue 25.
From the stack 25. At this time, a packing 26 is attached to the collection tube 2 to hermetically seal the gap between the collection tube 2 and the sample collection port 25a. In addition, a thermometer 27 such as a thermometer or a thermocouple is mounted in the branch path 12b of the sampling device 3.

In this state, the suction pump 21a is operated,
A part of the exhaust gas flowing through the flue 25 is sucked into the sampling pipe 2 at a constant speed as a sample gas. At this time, JIS Z 880
8, the temperature and flow rate of the exhaust gas flowing through the flue 25
The constant-rate suction amount is calculated by measuring the pressure, the water content, and the like, and the suction flow rate by the suction pump 21a is adjusted based on the calculation result. The flow rate set here is preferably monitored appropriately by the gas meter 21b and adjusted appropriately so as to maintain the constant-speed suction state.

The sample gas flowing into the collection pipe 2 is cooled by the cooler 5 and is usually cooled to a temperature lower than the generation temperature of dioxins, for example, 120 ° C. or lower. This prevents new generation of dioxins in the collection pipe 2.

The cooled sample gas flows from the collection pipe 2 into the collection filter 7 via the introduction pipe 8 of the collection device 3. The sample gas flowing into the collection filter 7 passes through the collection filter 7 and flows into the main body 10 of the holder 6 as indicated by an arrow in FIG.
It flows toward the suction device 4 via a. At this time, various dusts contained in the sample gas, and dioxins and coplanar PCBs in both particulate and gaseous forms
Various chlorinated organic compounds such as described above are simultaneously captured by the porous body formed using the above-mentioned fiber material constituting the collection filter 7, and are collected from the sample gas.

At this time, if the sample gas contains a large amount of unburned hydrocarbons or carbon compounds such as carbon monoxide (CO), tar derived from the carbon compound is easily generated in the sample gas. . Since this tar often dissolves and takes in various chlorinated organic compounds such as dioxins and coplanar PCB, the tar is not provided with the tar adsorbent of the present invention as the collection filter 7, However, when a filter composed of only the above-described porous body is used, the filter cannot effectively capture the tar generated in the sample gas, and as a result, a part of the tar contained in the sample gas is removed. There is a possibility that it will be discharged outside through the filter. That is,
The chlorinated organic compound dissolved therein may be discharged to the outside together with the part of the tar without being collected by the filter. Incidentally, according to the study of the present inventors, when carbon monoxide is used as an index for determining the amount of unburned carbon compounds, the concentration of carbon monoxide contained in the sample gas exceeds 150 ppm. It has been found that in such cases, the passage of such tars can be significant.

On the other hand, the collecting filter 7 described above is used.
Since the tar adsorbent of the present invention is applied to the porous body formed using a fiber material as described above, even if the unburned carbon compound concentration in the sample gas is high, (For example, even when the concentration of carbon monoxide in the sample gas exceeds 150 ppm), the tar contained in the sample gas can be captured substantially without leakage. In other words, the sampling filter 7 is capable of irrespective of the level of the concentration of the unburned carbon compound in the sample gas,
Various chlorinated organic compounds such as dioxins and coplanar PCBs in both the particle state and the gas state contained in the sample gas can be captured and collected substantially without leakage.

As described above, the sample gas from which the dust and various chlorinated organic compounds in the form of particles and gas have been substantially completely removed by the sampling filter 7 is continuously discharged from the discharge path 12a to the suction device 4a. Flows towards
At this time, the temperature of the sample gas flowing through the discharge path 12a is measured and managed by the temperature detector 27 attached to the branch path 12b.

The sample gas discharged from the discharge path 12a is
It flows into the exhaust passage 20 and is further cooled by the cooler 23 thereof. Thereby, moisture contained in the sample gas is condensed and stored in the trap 24. The sample gas from which the moisture has been removed in this way is discharged from the gas meter 21b to the outside via the suction pump 21a. The sampling of the sample gas, that is, the exhaust gas, by the sampling device 1 is usually performed for a time corresponding to the amount of the exhaust gas assumed from the detection limit value of the chlorinated organic compound (normally, the exhaust gas is 1 to ³ Nm ³ / 3-4 hours).

When analyzing the concentration of the chlorinated organic compound contained in the sample gas (exhaust gas) thus collected, the sampling device 1 is removed from the flue 25 and the sampling device 3 is removed from the sampling device 1. Is separated. Further, the collecting filter 7 is taken out of the separated collecting device 3.

Next, the inside of the collection tube 2, the introduction tube 8 and the holder 6 is washed using a solvent, and a washing liquid at that time is secured. In addition, the chlorinated organic compound captured by the collection filter 7 of the collection device 3 is extracted with a solvent. Here, the extraction operation of the chlorinated organic compound captured by the collection filter 7 can be performed using, for example, a normal Soxhlet extractor, and the collection filter 7 has a small size as described above. When it is set, it can be accommodated in the cell of the high-speed extractor, and the extraction operation can be quickly performed using the high-speed extractor. In addition, when the porosity of the porous body constituting the sampling filter 7 is set in the above range, it is not necessary to set special extraction conditions for shortening the extraction time, and the captured filter 7 is captured. The chlorinated organic compound can be eluted into the solvent quickly in a short time.

When analyzing a chlorinated organic compound, the above-mentioned washing solution and the extract obtained by the above-mentioned extraction operation are combined, and an analysis operation is performed on the combined solution. The analysis method in this case is described in, for example, "Manual for Standard Measurement and Analysis of Dioxins in Waste Disposal" (March 1997: Published by Waste Management Foundation) It is possible to adopt a method using gas chromatography / mass spectrometry (GC / MS method) in accordance with the method specified or the method specified in Japanese Industrial Standards JIS K 0311: 1999 (established on September 20, 1999). it can.

In the sampling filter 7, the cylindrical porous body is impregnated with the aqueous solution (dispersion) of the tar adsorbent of the present invention, so that the tar adsorbent is impregnated on the porous body. However, the tar adsorbent of the present invention may be applied to the cylindrical porous body in another state. For example, the tar adsorbent may be coated by applying an aqueous solution (dispersion liquid) on the outer peripheral surface side or the inner peripheral surface side of the cylindrical porous body. Further, the porous body constituting the collection filter 7 may be formed in a multilayer structure with a layer made of a tar adsorbent interposed therebetween.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a more specific description will be given by taking as an example the case where the tar adsorbent of the present invention is applied to the collecting filter 7 of the above-mentioned collecting apparatus 1. Here, for convenience of understanding, first, a comparative example will be given, and then an example will be described.

Comparative Example 1 5% by weight of coal-based fibrous activated carbon having an average fiber diameter of 14 μm
And 95% by weight of carbon fibers having an average fiber diameter of 13 μm, and a cellulosic binder was added thereto to obtain a molding material. The obtained molding material was molded into a cylindrical shape having one end closed, and the molded body was heated to dry the cellulosic binder. Thereby, the outer diameter of the opening end side is 19 mm,
A cylindrical porous body having a weight of 2.3 g and a porosity of 95% (filter for collection), having an outer diameter of 18 mm, a thickness of 5 mm and a length of 120 mm on the closed end side, respectively.
I got

The chlorinated organic compound sampling device 3 according to the above-described embodiment is prepared using the obtained sampling filter, and the sampling device 1 according to the above-described embodiment is configured using the sampling device 3. did. Then, a sample gas (exhaust gas) is collected from the flue of the incinerator during the incineration of waste using the sampling device 1, and various chlorinations such as dioxins and coplanar PCB contained in the sample gas are collected. The organic compound was collected. Note that the sampling conditions for the sample gas are JIS
The conditions specified in K 0311: 1999 were followed.

At the same time, JIS K 0311: 1999
The sample gas (exhaust gas) is sampled from the same flue under the same conditions using a sample gas sampling device equipped with an impinger (hereinafter, referred to as “JIS method example device”), and And various chlorinated organic compounds such as dioxins and coplanar PCB contained in the sample.

The collected chlorinated organic compounds were subjected to JIS K
0311: Extracted according to the method according to 1999, and quantitatively analyzed according to the analysis method specified in the same JIS.
As a result, the average carbon monoxide concentration in the sample gas was 150 p.
pm or less, the amount of the chlorinated organic compound collected by the collection device using the collection filter of this comparative example is J
Although it was 3% different from the amount of the chlorinated organic compound collected using the IS method example apparatus, it was found that the amount was substantially the same as that of the JIS method example apparatus. On the other hand, when the average carbon monoxide concentration in the sample gas is 510 ppm, the amount of the chlorinated organic compound collected using the collection filter of this comparative example is the amount of the chlorinated organic compound collected using the JIS method exemplified apparatus. Only 85% of the amount. Thus, the sampling filter of this comparative example, when the concentration of carbon monoxide in the sample gas increases, that is, when the concentration of unburned carbon compounds in the sample gas increases and tar derived from the carbon compound is generated, It can be seen that tar cannot be captured, and as a result, it becomes difficult to capture a part of the chlorinated organic compound contained in the sample gas.

Comparative Example 2 5% by weight of coal-based fibrous activated carbon having an average fiber diameter of 14 μm,
65% by weight of carbon fibers having an average fiber diameter of 13 μm and 30% by weight of glass fibers having an average fiber diameter of 3 μm were mixed, and a cellulose-based binder was added thereto to obtain a molding material. The obtained molding material was molded into a cylindrical shape having one end closed, and the molded body was heated to dry the cellulosic binder. Thereby, a cylindrical porous body (collecting filter) having the same size as that of Comparative Example 1 and having a weight of 2.5 g and a porosity of 95% was obtained.

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were collected in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the result obtained when the sample was collected by the S method exemplified apparatus, when the average carbon monoxide concentration in the sample gas is 150 ppm or less, the amount of the chlorinated organic compound collected using the collection filter of this comparative example is: Although it was 3% different from the amount of the chlorinated organic compound collected using the JIS method exemplified apparatus, it was found that the amount was substantially the same as the case using the JIS method exemplified apparatus. On the other hand, when the average carbon monoxide concentration in the sample gas is 550 ppm, the amount of the chlorinated organic compound sampled using the sampling filter of this comparative example is JI
It was only 82% of the amount of the chlorinated organic compound collected using the apparatus for the S method. Thus, the sampling filter of this comparative example, when the concentration of carbon monoxide in the sample gas increases, that is, when the concentration of unburned carbon compounds in the sample gas increases and tar derived from the carbon compound is generated, It can be seen that tar cannot be captured, and as a result, it becomes difficult to capture a part of the chlorinated organic compound contained in the sample gas.

[0051]Comparative Example 3 5% by weight of a coal-based fibrous activated carbon having an average fiber diameter of 14 μm,
45% by weight of carbon fiber having an average fiber diameter of 13 μm and an average
A commercially available alumina fiber having a fiber diameter of 15 μm (Al _TwoO_ThreeIs 9
9% or more) 50% by weight cut into chops and mixed
Then, a cellulosic binder is added to this to form a molding material.
Obtained. The obtained molding material is formed into a cylindrical shape with one end closed.
And heat this molded body to remove the cellulosic binder.
Dried. Thereby, the outer diameter of the opening end side is 19 mm,
The outer diameter of the chain end is 18mm, the thickness is 5mm and the length is 1
2.7g weight and air gap, each set to 20mm
96% cylindrical porous material (filter for collection)
Obtained.

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the result obtained when the sample was collected by the S method exemplified apparatus, when the average carbon monoxide concentration in the sample gas is 150 ppm or less, the amount of the chlorinated organic compound collected using the collection filter of this comparative example is: Although it was 3% different from the amount of the chlorinated organic compound collected using the JIS method exemplified apparatus, it was found that the amount was substantially the same as the case using the JIS method exemplified apparatus. On the other hand, when the average carbon monoxide concentration in the sample gas is 300 ppm, the amount of the chlorinated organic compound collected using the filter for collection of this comparative example is JI
It was only 86% of the amount of the chlorinated organic compound collected using the apparatus for the S method. Thus, the sampling filter of this comparative example, when the concentration of carbon monoxide in the sample gas increases, that is, when the concentration of unburned carbon compounds in the sample gas increases and tar derived from the carbon compound is generated, It can be seen that tar cannot be captured, and as a result, it becomes difficult to capture a part of the chlorinated organic compound contained in the sample gas.

Comparative Example 4 A commercially available alumina fiber having an average fiber diameter of 11 μm (Al ₂ O ₃
Was cut into a chop shape, and an alumina binder was added thereto to obtain a molding material. The obtained molding material was molded into a cylindrical shape having one end closed, and the molded body was heated and dried. As a result, the outer diameter at the opening end side becomes 19
mm, the outer diameter of the closed end side was set to 18 mm, the thickness was set to 5 mm, and the length was set to 120 mm, and the weight was 3.5.
Thus, a cylindrical porous body (collecting filter) having a porosity of 96% was obtained.

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the result obtained when the sample was collected by the S method exemplified apparatus, when the average carbon monoxide concentration in the sample gas is 150 ppm or less, the amount of the chlorinated organic compound collected using the collection filter of this comparative example is: Although it was 3% different from the amount of the chlorinated organic compound collected using the JIS method exemplified apparatus, it was found that the amount was substantially the same as the case using the JIS method exemplified apparatus. On the other hand, when the average carbon monoxide concentration in the sample gas is 350 ppm, the amount of the chlorinated organic compound collected using the collection filter of this comparative example is JI
The amount was only 87% of the amount of the chlorinated organic compound collected using the apparatus for the S method. Thus, the sampling filter of this comparative example, when the concentration of carbon monoxide in the sample gas increases, that is, when the concentration of unburned carbon compounds in the sample gas increases and tar derived from the carbon compound is generated, It can be seen that tar cannot be captured, and as a result, it becomes difficult to capture a part of the chlorinated organic compound contained in the sample gas.

Comparative Example 5 A commercially available alumina fiber having an average fiber diameter of 11 μm (Al ₂ O ₃
Was 95% or more) 50% by weight and 50% by weight of glass fiber having an average fiber diameter of 3 μm were cut into a chop shape and mixed, and an alumina binder was added to the mixture to obtain a molding material. The obtained molding material was molded into a cylindrical shape having one end closed, and the molded body was heated and dried. This allows
The outer diameter at the open end is 19mm, and the outer diameter at the closed end is 18m
m, a thickness of 5 mm and a length of 120 mm were obtained, and a cylindrical porous body (collecting filter) having a weight of 3.2 g and a porosity of 96% was obtained.

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the result obtained when the sample was collected by the S method exemplified apparatus, when the average carbon monoxide concentration in the sample gas is 150 ppm or less, the amount of the chlorinated organic compound collected using the collection filter of this comparative example is: Although it was 3% different from the amount of the chlorinated organic compound collected using the JIS method exemplified apparatus, it was found that the amount was substantially the same as the case using the JIS method exemplified apparatus. On the other hand, when the average carbon monoxide concentration in the sample gas is 300 ppm, the amount of the chlorinated organic compound collected using the filter for collection of this comparative example is JI
It was only 86% of the amount of the chlorinated organic compound collected using the apparatus for the S method. Thus, the sampling filter of this comparative example, when the concentration of carbon monoxide in the sample gas increases, that is, when the concentration of unburned carbon compounds in the sample gas increases and tar derived from the carbon compound is generated, It can be seen that tar cannot be captured, and as a result, it becomes difficult to capture a part of the chlorinated organic compound contained in the sample gas.

Comparative Example 6 50% by weight of glass fiber having an average fiber diameter of 3 μm and 50% by weight of glass fiber having an average fiber diameter of 19 μm were cut into a chop shape, and an alumina binder was added thereto to obtain a molding material. The obtained molding material was molded into a cylindrical shape having one end closed, and the molded body was heated and dried. Thereby, the outer diameter of the open end side is 19 mm, the outer diameter of the closed end side is 18 mm,
A cylindrical porous body (collecting filter) having a thickness of 5 mm and a length of 120 mm, a weight of 3.6 g, and a porosity of 96% was obtained.

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the result obtained when the sample was collected by the S method exemplified apparatus, when the average carbon monoxide concentration in the sample gas is 150 ppm or less, the amount of the chlorinated organic compound collected using the collection filter of this comparative example is: Although it was 3% different from the amount of the chlorinated organic compound collected using the JIS method exemplified apparatus, it was found that the amount was substantially the same as the case using the JIS method exemplified apparatus. On the other hand, when the average carbon monoxide concentration in the sample gas was 290 ppm, the amount of the chlorinated organic compound collected using the filter for collection of this comparative example was JI
The amount was only 88% of the amount of the chlorinated organic compound collected by using the apparatus for the S method. Thus, the sampling filter of this comparative example, when the concentration of carbon monoxide in the sample gas increases, that is, when the concentration of unburned carbon compounds in the sample gas increases and tar derived from the carbon compound is generated, It can be seen that tar cannot be captured, and as a result, it becomes difficult to capture a part of the chlorinated organic compound contained in the sample gas.

Example 1 An aqueous dispersion (commercially available) in which about 7% by weight of alumina was dispersed was prepared, and the porous material obtained in Comparative Example 1 was immersed in this aqueous dispersion. Then, the porous body was taken out from the aqueous dispersion and dried in a dryer set at 150 ° C. to remove water. Thus, a porous body to which alumina as a tar adsorbent was applied (impregnated), that is, a sampling filter was obtained. This sampling filter has a weight of 3.
9 g, indicating that 1.6 g of alumina was provided.

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the results obtained when the sample was sampled by the S method example device, the sample gas was sampled using the JIS method example device both when the average carbon monoxide concentration in the sample gas was 150 ppm or less and when the same concentration was 600 ppm. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter according to the first embodiment uses the unburned carbon compound (such as carbon monoxide) contained in the sample gas.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

Example 2 Instead of an aqueous dispersion of alumina, 7% by weight of a mixture of alumina (A) and Ca-type artificial zeolite (B) at a weight ratio of A: B = 2: 1 was dispersed. A sampling filter was obtained in the same manner as in Example 1 except that an aqueous dispersion was used. This filter for collection weighed 3.8 g, and it was found that 1.5 g of a mixture of alumina as a tar adsorbent and Ca-type artificial zeolite was applied (impregnated).

Using the obtained filter for sampling, chlorinated organic compounds contained in the sample gas collected from the flue were collected in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the results obtained by the sample method using the S method, both the cases where the average carbon monoxide concentration in the sample gas was 150 ppm or less and the case where the concentration was 570 ppm were sampled using the JIS method example device. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter of the second embodiment is based on the unburned carbon compounds (such as carbon monoxide) contained in the sample gas.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

Example 3 An aqueous dispersion (commercially available) in which about 7% by weight of alumina was dispersed was prepared, and the porous material obtained in Comparative Example 2 was immersed in this aqueous dispersion. Then, the porous body was taken out from the aqueous dispersion and dried in a dryer set at 150 ° C. to remove water. Thus, a porous body to which alumina as a tar adsorbent was applied (impregnated), that is, a sampling filter was obtained. This sampling filter has a weight of 3.
9 g, indicating that 1.4 g of alumina was provided.

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the quantitative analysis results were analyzed by JI.
When compared with the results obtained by the sample method using the S method, both the cases where the average carbon monoxide concentration in the sample gas was 150 ppm or less and the case where the concentration was 530 ppm were sampled using the JIS method example device. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter of the third embodiment is characterized in that the unburned carbon compounds (such as carbon monoxide) contained in the sample gas are used.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

Example 4 Instead of an aqueous dispersion of alumina, 7% by weight of a mixture of alumina (A) and Ca-type artificial zeolite (B) at a weight ratio of A: B = 2: 1 was dispersed. A sampling filter was obtained in the same manner as in Example 3 except that an aqueous dispersion was used. This filter for collection weighed 3.8 g, and it was found that 1.3 g of a mixture of alumina as a tar adsorbent and Ca-type artificial zeolite was applied (impregnated).

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the results obtained by the sample method using the S method, both the cases where the average carbon monoxide concentration in the sample gas was 150 ppm or less and the case where the concentration was 540 ppm were collected using the JIS method example device. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter of the fourth embodiment is characterized in that the unburned carbon compounds (such as carbon monoxide) contained in the sample gas are used.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

Example 5 An aqueous dispersion in which 7% by weight of a mixture obtained by mixing alumina (A) and silica (B) in a weight ratio of A: B = 9: 1 was prepared was prepared. The porous body obtained in Comparative Example 1 was immersed therein. Then, the porous body was taken out from the aqueous dispersion and dried in a dryer set at 150 ° C. to remove water. Thus, a porous body impregnated (impregnated) with a mixture of alumina and silica as a tar adsorbent, that is, a sampling filter was obtained. It was found that this sampling filter weighed 4.8 g, and was provided with 2.5 g of a mixture of alumina and silica, which were inorganic adsorbents.

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the results obtained when the sample was sampled by the S method, the sample gas was sampled using the JIS method when the average carbon monoxide concentration in the sample gas was 150 ppm or less and when the concentration was 620 ppm. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter of the fifth embodiment is characterized in that the unburned carbon compounds (such as carbon monoxide) contained in the sample gas are used.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

Example 6 A sampling filter was obtained in the same manner as in Example 5, except that the porous body obtained in Comparative Example 2 was used. This sampling filter weighs 4.8 g,
1. A mixture of alumina and silica, which are tar adsorbents,
It was found that 3 g was applied (impregnated).

Using the obtained sampling filter, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the results obtained when the sample was sampled by the S method, the sample gas was sampled using the JIS method when the average concentration of carbon monoxide in the sample gas was 150 ppm or less and when the concentration was 590 ppm. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter of the sixth embodiment is characterized in that the unburned carbon compounds (such as carbon monoxide) contained in the sample gas are used.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

Example 7 An aqueous dispersion in which 7% by weight of alumina was dispersed was prepared, and the porous body obtained in Comparative Example 3 was immersed in the aqueous dispersion.
Then, the porous body was taken out of the aqueous dispersion and sintered in a furnace set at 350 ° C. Thus, a porous body to which alumina as a tar adsorbent was applied (impregnated), that is, a sampling filter was obtained. This sampling filter weighs 4.2 g and contains 1.5 g of alumina.
It turns out that it has been granted.

Using the obtained sampling filter, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the results obtained by the sample method using the S method, both the cases where the average carbon monoxide concentration in the sample gas was 150 ppm or less and the case where the concentration was 730 ppm were sampled using the JIS method example device. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the filter for collection of Example 7 is based on the unburned carbon compounds (such as carbon monoxide) contained in the sample gas.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

Example 8 An aqueous dispersion in which about 7% by weight of alumina was dispersed was prepared, and the porous material obtained in Comparative Example 4 was immersed in this aqueous dispersion. Then, the porous body was taken out of the aqueous dispersion and sintered in a furnace set at 350 ° C. Thus, a porous body to which alumina as a tar adsorbent was applied (impregnated), that is, a sampling filter was obtained. This sampling filter was found to have a weight of 5.0 g and 1.5 g of alumina.

Using the obtained sampling filter, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the results obtained when the sample was sampled by the S method example apparatus, the sample gas was sampled using the JIS method example apparatus both when the average carbon monoxide concentration in the sample gas was 150 ppm or less and when the average carbon monoxide concentration was 700 ppm. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. From this, the sampling filter of Example 8 is based on the unburned carbon compounds (such as carbon monoxide) contained in the sample gas.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

Example 9 An aqueous dispersion in which about 7% by weight of alumina was dispersed was prepared, and the porous material obtained in Comparative Example 5 was immersed in this aqueous dispersion. Then, the porous body was taken out of the aqueous dispersion and sintered in a furnace set at 350 ° C. Thus, a porous body to which alumina as a tar adsorbent was applied (impregnated), that is, a sampling filter was obtained. It was found that this sampling filter weighed 4.8 g and provided 1.6 g of alumina.

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the quantitative analysis results were analyzed by JI.
When compared with the results obtained when the sample was sampled by the method S, the sample was sampled using the sample JIS method both when the average carbon monoxide concentration in the sample gas was 150 ppm or less and when the concentration was 750 ppm. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter of the ninth embodiment is characterized in that the unburned carbon compounds (such as carbon monoxide) contained in the sample gas are used.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

Example 10 An aqueous dispersion in which about 7% by weight of alumina was dispersed was prepared, and the porous body obtained in Comparative Example 6 was immersed in this aqueous dispersion. Then, the porous body was taken out of the aqueous dispersion and sintered in a furnace set at 350 ° C. Thus, a porous body to which alumina as a tar adsorbent was applied (impregnated), that is, a sampling filter was obtained. This sampling filter was found to have a weight of 5.2 g and 1.6 g of alumina.

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the quantitative analysis results were analyzed by JI.
When compared with the results obtained when the sample was sampled by the method S, the sample was sampled using the sample JIS method both when the average carbon monoxide concentration in the sample gas was 150 ppm or less and when the concentration was 740 ppm. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter of Example 10 is
Tar derived from unburned carbon compounds (such as carbon monoxide) contained in the sample gas can be adsorbed, and as a result,
It can be seen that various chlorinated organic compounds in both the particle state and the gas state contained in the sample gas can be collected substantially in the same manner as in the case of using the JIS method exemplified apparatus.

[0079]

The tar adsorbent of the present invention can effectively adsorb tar contained in a gas, particularly tar derived from at least one of unburned hydrocarbons and carbon monoxide.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a chlorinated organic compound collecting apparatus employing a tar adsorbent of the present invention.

FIG. 2 is a front view of a chlorinated organic compound collecting device employed in the chlorinated organic compound collecting device.

FIG. 3 is a longitudinal sectional view of the sampler.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;

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[Procedure amendment]

[Submission date] August 29, 2000 (2008.2.
9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

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[0005]

The tar adsorbent of the present invention is for adsorbing tar contained in a gas, and is composed of at least one selected from the group consisting of alumina and silicon dioxide . Where alumina is an example
An example is activated alumina. The tar to which the adsorbent can adsorb is usually derived from at least one of unburned hydrocarbons and carbon monoxide.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The tar adsorbent of the present invention is made of aluminum.
And at least one selected from the group consisting of silicon dioxide and silica. That is, the tar adsorbent may be made of one of alumina and silicon dioxide , or a combination of these.
It may be given.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

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[Procedure amendment 5]

[Document name to be amended] Statement

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[Procedure amendment 6]

[Document name to be amended] Statement

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[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

The form of the tar adsorbent of the present invention is not particularly limited. That is, the tar adsorbent may have various shapes such as a particle shape and a fiber shape as long as it is selected from the group consisting of the above-mentioned alumina and silicon dioxide . Further, a mixture of two or more shapes such as a mixture of a particulate material and a fibrous material may be used.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0061

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[Procedure amendment 9]

[Document name to be amended] Statement

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[Procedure amendment 10]

[Document name to be amended] Statement

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[Correction method] Change

[Correction contents]

Example 2 An aqueous dispersion (commercially available) in which about 7% by weight of alumina was dispersed was prepared, and the porous material obtained in Comparative Example 2 was immersed in this aqueous dispersion. Then, the porous body was taken out from the aqueous dispersion and dried in a dryer set at 150 ° C. to remove water. Thus, a porous body to which alumina as a tar adsorbent was applied (impregnated), that is, a sampling filter was obtained. This sampling filter has a weight of 3.
9 g, indicating that 1.4 g of alumina was provided.

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0064

[Correction method] Change

[Correction contents]

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the quantitative analysis results were analyzed by JI.
When compared with the results obtained by the sample method using the S method, both the cases where the average carbon monoxide concentration in the sample gas was 150 ppm or less and the case where the concentration was 530 ppm were sampled using the JIS method example device. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter of the second embodiment is based on the unburned carbon compounds (such as carbon monoxide) contained in the sample gas.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0065

[Correction method] Deleted

[Procedure amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0066

[Correction method] Deleted

[Procedure amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0067

[Correction method] Change

[Correction contents]

Example 3 An aqueous dispersion in which 7% by weight of a mixture of alumina (A) and silica (B) mixed in a weight ratio of A: B = 9: 1 was prepared was prepared. The porous body obtained in Comparative Example 1 was immersed therein. Then, the porous body was taken out from the aqueous dispersion and dried in a dryer set at 150 ° C. to remove water. Thus, a porous body impregnated (impregnated) with a mixture of alumina and silica as a tar adsorbent, that is, a sampling filter was obtained. It was found that this sampling filter weighed 4.8 g, and was provided with 2.5 g of a mixture of alumina and silica, which were inorganic adsorbents.

[Procedure amendment 15]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the results obtained when the sample was sampled by the S method, the sample gas was sampled using the JIS method when the average carbon monoxide concentration in the sample gas was 150 ppm or less and when the concentration was 620 ppm. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter of the third embodiment is characterized in that the unburned carbon compounds (such as carbon monoxide) contained in the sample gas are used.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

[Procedure amendment 16]

[Document name to be amended] Statement

[Correction target item name] 0069

[Correction method] Change

[Correction contents]

Example 4 A sampling filter was obtained in the same manner as in Example 3 except that the porous body obtained in Comparative Example 2 was used. This sampling filter weighs 4.8 g,
1. A mixture of alumina and silica, which are tar adsorbents,
It was found that 3 g was applied (impregnated).

[Procedure amendment 17]

[Document name to be amended] Statement

[Correction target item name] 0070

[Correction method] Change

[Correction contents]

Using the obtained sampling filter, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the results obtained when the sample was sampled by the S method, the sample gas was sampled using the JIS method when the average concentration of carbon monoxide in the sample gas was 150 ppm or less and when the concentration was 590 ppm. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter of the fourth embodiment is characterized in that the unburned carbon compounds (such as carbon monoxide) contained in the sample gas are used.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

[Procedure amendment 18]

[Document name to be amended] Statement

[Correction target item name] 0071

[Correction method] Change

[Correction contents]

Example 5 An aqueous dispersion in which 7% by weight of alumina was dispersed was prepared, and the porous material obtained in Comparative Example 3 was immersed in this aqueous dispersion.
Then, the porous body was taken out of the aqueous dispersion and sintered in a furnace set at 350 ° C. Thus, a porous body to which alumina as a tar adsorbent was applied (impregnated), that is, a sampling filter was obtained. This sampling filter weighed 4.2 g and contained 1.5 g of alumina.
It turns out that it has been granted.

[Procedure amendment 19]

[Document name to be amended] Statement

[Correction target item name] 0072

[Correction method] Change

[Correction contents]

Using the obtained sampling filter, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the results obtained by the sample method using the S method, both the cases where the average carbon monoxide concentration in the sample gas was 150 ppm or less and the case where the concentration was 730 ppm were sampled using the JIS method example device. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter of the fifth embodiment is characterized in that the unburned carbon compounds (such as carbon monoxide) contained in the sample gas are used.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

[Procedure amendment 20]

[Document name to be amended] Statement

[Correction target item name] 0073

[Correction method] Change

[Correction contents]

Example 6 An aqueous dispersion in which about 7% by weight of alumina was dispersed was prepared, and the porous material obtained in Comparative Example 4 was immersed in this aqueous dispersion. Then, the porous body was taken out of the aqueous dispersion and sintered in a furnace set at 350 ° C. Thus, a porous body to which alumina as a tar adsorbent was applied (impregnated), that is, a sampling filter was obtained. This sampling filter was found to have a weight of 5.0 g and 1.5 g of alumina.

[Procedure amendment 21]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

Using the obtained sampling filter, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the results of the quantitative analysis were analyzed by JI.
When compared with the results obtained when the sample was sampled by the S method example apparatus, the sample gas was sampled using the JIS method example apparatus both when the average carbon monoxide concentration in the sample gas was 150 ppm or less and when the average carbon monoxide concentration was 700 ppm. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the sampling filter of the sixth embodiment is characterized in that the unburned carbon compounds (such as carbon monoxide) contained in the sample gas are used.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

[Procedure amendment 22]

[Document name to be amended] Statement

[Correction target item name] 0075

[Correction method] Change

[Correction contents]

Example 7 An aqueous dispersion in which about 7% by weight of alumina was dispersed was prepared, and the porous body obtained in Comparative Example 5 was immersed in this aqueous dispersion. Then, the porous body was taken out of the aqueous dispersion and sintered in a furnace set at 350 ° C. Thus, a porous body to which alumina as a tar adsorbent was applied (impregnated), that is, a sampling filter was obtained. It was found that this sampling filter weighed 4.8 g and provided 1.6 g of alumina.

[Procedure amendment 23]

[Document name to be amended] Statement

[Correction target item name] 0076

[Correction method] Change

[Correction contents]

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the quantitative analysis results were analyzed by JI.
When compared with the results obtained when the sample was sampled by the method S, the sample was sampled using the sample JIS method both when the average carbon monoxide concentration in the sample gas was 150 ppm or less and when the concentration was 750 ppm. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. Thus, the filter for collection of Example 7 is based on the unburned carbon compounds (such as carbon monoxide) contained in the sample gas.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

[Procedure amendment 24]

[Document name to be amended] Statement

[Correction target item name] 0077

[Correction method] Change

[Correction contents]

Example 8 An aqueous dispersion in which about 7% by weight of alumina was dispersed was prepared, and the porous material obtained in Comparative Example 6 was immersed in this aqueous dispersion. Then, the porous body was taken out of the aqueous dispersion and sintered in a furnace set at 350 ° C. Thus, a porous body to which alumina as a tar adsorbent was applied (impregnated), that is, a sampling filter was obtained. This sampling filter was found to have a weight of 5.2 g and 1.6 g of alumina.

[Procedure amendment 25]

[Document name to be amended] Statement

[Correction target item name] 0078

[Correction method] Change

[Correction contents]

Using the sampling filter thus obtained, chlorinated organic compounds contained in the sample gas collected from the flue were sampled in the same manner as in Comparative Example 1, and the quantitative analysis results were analyzed by JI.
When compared with the results obtained when the sample was sampled by the method S, the sample was sampled using the sample JIS method both when the average carbon monoxide concentration in the sample gas was 150 ppm or less and when the concentration was 740 ppm. 3% different from the amount of chlorinated organic compounds
It turned out that it matched with the case by the apparatus of the S method illustration. From this, the sampling filter of Example 8 is based on the unburned carbon compounds (such as carbon monoxide) contained in the sample gas.
Can be adsorbed, and as a result, various types of chlorinated organic compounds in both the particle state and the gas state contained in the sample gas are substantially equivalent to the case using the JIS method exemplified apparatus. You can see that it can be collected.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Muneki Ouchi 7, Horie-cho, Matsuyama-shi, Ehime Miura Industrial Co., Ltd. (72) Inventor Masazumi Yamashita 7, Horie-cho, Matsuyama-shi, Ehime Miura Industrial Co., Ltd. (72 ) Inventor Hiroshi Nakamura 7, Horie-cho, Matsuyama-shi, Ehime Miura Industrial Co., Ltd. (72) Inventor Osamu Kajikawa 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Osaka Gas Co., Ltd. (72) Inventor Fujii Takatomo 3-8-21 Jonan, Ikeda-shi, Osaka Taisei Chemical Co., Ltd. F-term (reference) 4G066 AA20B AA22B AA61B BA16 CA21 CA33 DA02 FA15 FA22

Claims (4)

[Claims] 1. A tar adsorbent for adsorbing tar contained in a gas, the tar adsorbent comprising at least one selected from the group consisting of alumina, zeolite and silicon dioxide. 2. The tar adsorbent according to claim 1, wherein said alumina is activated alumina. 3. The method according to claim 1, wherein the zeolite is an artificial zeolite.
The tar adsorbent according to claim 1. 4. The tar adsorbent according to claim 1, wherein the tar is derived from at least one of unburned hydrocarbons and carbon monoxide.