JP2013233493A - Method of manufacturing slurry for denitration catalyst and waste gas denitration device - Google Patents
Method of manufacturing slurry for denitration catalyst and waste gas denitration device Download PDFInfo
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- JP2013233493A JP2013233493A JP2012106575A JP2012106575A JP2013233493A JP 2013233493 A JP2013233493 A JP 2013233493A JP 2012106575 A JP2012106575 A JP 2012106575A JP 2012106575 A JP2012106575 A JP 2012106575A JP 2013233493 A JP2013233493 A JP 2013233493A
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- 239000002002 slurry Substances 0.000 title claims abstract description 87
- 239000003054 catalyst Substances 0.000 title claims abstract description 75
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000002912 waste gas Substances 0.000 title abstract 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000002245 particle Substances 0.000 claims abstract description 17
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 16
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims abstract description 7
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000654 additive Substances 0.000 abstract description 4
- 239000000377 silicon dioxide Substances 0.000 abstract description 4
- 239000000243 solution Substances 0.000 abstract description 4
- 239000007864 aqueous solution Substances 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
Description
本発明は、発電用ガスタービン、石炭焚きボイラー、各種化学プラント、廃棄物焼却炉等から出る排ガスの脱硝処理用触媒を製造する際に用いられる脱硝触媒用スラリーの製造方法、およびこの方法により製造された脱硝触媒用スラリーを用いて脱硝触媒を担持させたハニカム構造体を具備する排ガス脱硝装置に関するものである。 The present invention relates to a method for producing a denitration catalyst slurry used for producing a denitration catalyst for exhaust gas emitted from a power generation gas turbine, coal-fired boiler, various chemical plants, waste incinerators, and the like, and produced by this method. The present invention relates to an exhaust gas denitration apparatus comprising a honeycomb structure that supports a denitration catalyst using the denitration catalyst slurry.
本出願人は、下記の特許文献１において、セラミック繊維製ハニカム構造体を、シリカゾルにチタニア微粒子と、バナジウムおよび／ またはタングステンとを含む脱硝触媒用スラリーに浸漬し、これを取り出した後、焼成することにより脱硝触媒を製造する方法を開示した。 In the following Patent Document 1, the present applicant immerses a ceramic fiber honeycomb structure in a slurry for denitration catalyst containing titania fine particles and vanadium and / or tungsten in silica sol, and after taking it out, fires it. Thus, a method for producing a denitration catalyst has been disclosed.
また、下記の特許文献２では、シリカゾルと、チタニア粒子と、メタバナジン酸アンモニウムおよび／ またはメタタングステン酸アンモニウムとを含む脱硝触媒用スラリーであって、アンモニア水溶液によりそのｐＨを３．５〜６．０に調整した脱硝触媒スラリーを開示した。 Further, in Patent Document 2 below, a slurry for a denitration catalyst containing silica sol, titania particles, and ammonium metavanadate and / or ammonium metatungstate, the pH is adjusted to 3.5 to 6.0 with an aqueous ammonia solution. A denitration catalyst slurry adjusted to 1 was disclosed.
しかしながら、特許文献１に記載の脱硝触媒の製造方法では、時間の経過とともに脱硝触媒用スラリーの粘度が高くなり、その結果、ハニカム基材に担持される触媒量が時間の経過とともに増加し、安定した担持量の脱硝触媒を担持させたハニカム構造体を製造することが難しいという問題があった。 However, in the method for producing a denitration catalyst described in Patent Document 1, the viscosity of the slurry for the denitration catalyst increases with the passage of time, and as a result, the amount of catalyst supported on the honeycomb substrate increases with the passage of time and is stable. There is a problem that it is difficult to manufacture a honeycomb structure on which the supported amount of denitration catalyst is supported.
また、特許文献２に記載の脱硝触媒スラリーによれば、アンモニア水溶液の取り扱いに注意が必要であり、アンモニア水溶液などの添加剤を使用しない方法が望まれていた。 In addition, according to the denitration catalyst slurry described in Patent Document 2, care must be taken in handling the aqueous ammonia solution, and a method that does not use an additive such as an aqueous ammonia solution has been desired.
そこで、本発明の目的は、アンモニア水溶液などの添加剤を使用せずに、しかも時間の経過によっても脱硝触媒用スラリーの粘度が高くならない脱硝触媒用スラリーの製造方法を提供すること、およびこの方法により製造された脱硝触媒用スラリーを用いて、安定した担持量の脱硝触媒を担持させたハニカム構造体を具備する排ガス脱硝装置を提供することにある。 Accordingly, an object of the present invention is to provide a method for producing a slurry for a denitration catalyst that does not use an additive such as an aqueous ammonia solution and the viscosity of the slurry for a denitration catalyst does not increase over time, and this method It is an object of the present invention to provide an exhaust gas denitration apparatus including a honeycomb structure on which a denitration catalyst having a stable loading amount is loaded using the slurry for denitration catalyst manufactured by the above.
上記の目的を達成するために、請求項１の脱硝触媒用スラリーの製造方法の発明は、シリカゾルにチタニア粒子を懸濁させる第１工程と、ついで第１工程からのスラリーにメタバナジン酸アンモニウム粉末を添加する第２工程と、第２工程からのスラリーに、さらにメタタングステン酸アンモニウム水溶液または粉末を添加する第３工程とを具備する脱硝触媒用スラリーの製造方法であって、第１工程からのシリカゾルおよびチタニア粒子を含むスラリーに対し、上記第２工程の前において超音波を照射した後に水を添加するか、または第２工程からのシリカゾル、チタニア粒子およびメタバナジン酸アンモニウム粉末を含むスラリーに対し、上記第３工程の前において超音波を照射した後に水を添加することを特徴としている。 In order to achieve the above object, the invention of the method for producing a slurry for a denitration catalyst according to claim 1 includes a first step of suspending titania particles in silica sol, and an ammonium metavanadate powder in the slurry from the first step. A method for producing a slurry for a denitration catalyst comprising: a second step to be added; and a third step in which an ammonium metatungstate aqueous solution or powder is further added to the slurry from the second step, wherein the silica sol from the first step And for the slurry containing titania particles, water is added after ultrasonic irradiation before the second step, or for the slurry containing silica sol, titania particles and ammonium metavanadate powder from the second step, It is characterized by adding water after irradiating ultrasonic waves before the third step.
請求項２に記載の排ガス脱硝装置の発明は、請求項１に記載の脱硝触媒用スラリーの製造方法により製造された脱硝触媒用スラリーを用いて脱硝触媒を担持させたハニカム構造体を具備することを特徴としている。 The invention of the exhaust gas denitration device according to claim 2 comprises a honeycomb structure in which the denitration catalyst is carried using the slurry for denitration catalyst produced by the method for producing slurry for denitration catalyst according to claim 1. It is characterized by.
本発明の脱硝触媒用スラリーの製造方法によれば、アンモニア水溶液などの添加剤を使用せずに、しかも時間の経過によっても脱硝触媒用スラリーの粘度が高くならない脱硝触媒用スラリーを製造することができ、ひいてはこの方法により製造された脱硝触媒用スラリーを用いて、安定した担持量の脱硝触媒を担持させたハニカム構造体を具備する排ガス脱硝装置を提供することができるという効果を奏する。 According to the method for producing a slurry for a denitration catalyst of the present invention, it is possible to produce a slurry for a denitration catalyst that does not increase the viscosity of the slurry for a denitration catalyst over time without using an additive such as an aqueous ammonia solution. As a result, it is possible to provide an exhaust gas denitration apparatus having a honeycomb structure on which a desupporting catalyst having a stable load is supported by using the slurry for denitration catalyst produced by this method.
つぎに、本発明の実施の形態を、図面を参照して説明するが、本発明はこれらに限定されるものではない。 Next, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.
本発明者らは、脱硝触媒の製造方法として、先に、上記特許文献１などに記載の発明を開示しているが、本発明者らは、さらに鋭意研究を重ねた結果、シリカゾルにチタニア粒子を懸濁させる第１工程と、ついで第１工程からのスラリーにメタバナジン酸アンモニウム粉末を添加する第２工程と、第２工程からのスラリーに、さらにメタタングステン酸アンモニウム水溶液または粉末を添加する第３工程とを具備する脱硝触媒用スラリーの製造方法であって、第１工程からのシリカゾルおよびチタニア粒子を含むスラリーに対し、上記第２工程の前において超音波を照射した後に水を添加するか、または第２工程からのシリカゾル、チタニア粒子およびメタバナジン酸アンモニウム粉末を含むスラリーに対し、上記第３工程の前において超音波を照射した後に水を添加することで、脱硝触媒用スラリーの高粘度化を抑制できることを見出した。 The present inventors have previously disclosed the invention described in Patent Document 1 as a method for producing a denitration catalyst. However, as a result of further earnest research, the present inventors have made further studies on titania particles in silica sol. A second step of adding ammonium metavanadate powder to the slurry from the first step, and a third step of further adding an aqueous ammonium metatungstate solution or powder to the slurry from the second step. A slurry for a denitration catalyst comprising a step, wherein water is added to the slurry containing silica sol and titania particles from the first step after irradiation with ultrasonic waves before the second step, or Alternatively, for the slurry containing silica sol, titania particles and ammonium metavanadate powder from the second step, an ultrasonic wave is applied before the third step. By adding water after the irradiation was found to be able to suppress the viscosity increase of the denitration catalyst slurry.
本発明における超音波の照射を、出力５０Ｗ以上１２０Ｗ以下、周波数２８ｋＨｚ以上１００ｋＨｚ以下の条件で、照射時間３０分以上２時間以下、行うことが好ましい。 In the present invention, it is preferable that the irradiation with ultrasonic waves be performed for 30 minutes to 2 hours under conditions of an output of 50 W to 120 W and a frequency of 28 kHz to 100 kHz.
ここで、本発明の脱硝触媒用スラリーの製造方法の最大の特徴である、シリカゾルにチタニア粒子を懸濁させる第１工程の後のスラリーに超音波を照射することで、分散の効果が得られ、時間が経過しても脱硝触媒用スラリー中の脱硝触媒粒子の再凝縮を抑制することができ、脱硝触媒用スラリーの高粘度化を抑制できるものと考えられる。 Here, the effect of dispersion can be obtained by irradiating the slurry after the first step of suspending titania particles in silica sol, which is the most characteristic feature of the method for producing a slurry for a denitration catalyst of the present invention. Even if time elapses, it is considered that recondensation of the denitration catalyst particles in the denitration catalyst slurry can be suppressed, and the increase in viscosity of the denitration catalyst slurry can be suppressed.
また、本発明において超音波を照射した後のスラリーに水を添加することで、脱硝触媒用スラリーの粘度を調整することができる。 Moreover, the viscosity of the slurry for a denitration catalyst can be adjusted by adding water to the slurry after being irradiated with ultrasonic waves in the present invention.
また同様に、シリカゾル、チタニア粒子およびメタバナジン酸アンモニウム粉末を含む第２工程の後のスラリーに超音波を照射することで、分散の効果が得られ、時間が経過しても脱硝触媒用スラリー中の脱硝触媒粒子の再凝縮を抑制することができ、脱硝触媒用スラリーの高粘度化を抑制できるものと考えられる。 Similarly, by irradiating the slurry after the second step containing silica sol, titania particles and ammonium metavanadate powder with ultrasonic waves, a dispersion effect can be obtained. It is considered that recondensation of the denitration catalyst particles can be suppressed, and the increase in viscosity of the slurry for the denitration catalyst can be suppressed.
そして、本発明において超音波を照射した後のスラリーに水を添加することで、脱硝触媒用スラリーの粘度を調整することができる。 In the present invention, the viscosity of the denitration catalyst slurry can be adjusted by adding water to the slurry after being irradiated with ultrasonic waves.
ここで、超音波を照射した後のスラリーに水を添加することで、脱硝触媒用スラリーの粘度を、５０〜１００ｍＰａ・ｓに調整することが好ましい。 Here, it is preferable to adjust the viscosity of the slurry for a denitration catalyst to 50 to 100 mPa · s by adding water to the slurry after being irradiated with ultrasonic waves.
そして、このように粘度調整された脱硝触媒用スラリーは、時間が経過しても脱硝触媒用スラリーの高粘度化を抑制することができる。 And the slurry for denitration catalyst adjusted in viscosity in this way can suppress the increase in viscosity of the slurry for denitration catalyst even if time passes.
さらに、本発明の排ガス脱硝装置は、上記の本発明の脱硝触媒用スラリーの製造方法により製造された脱硝触媒用スラリーを用いて、安定した担持量の脱硝触媒を担持させたハニカム構造体を具備することを特徴としている。 Further, the exhaust gas denitration device of the present invention comprises a honeycomb structure in which a denitration catalyst slurry produced by the above-described method for producing a denitration catalyst slurry of the present invention is used to carry a stable supported amount of the denitration catalyst. It is characterized by doing.
ここで、ハニカム構造体としては、セラミック繊維シートやガラス繊維、シリカ繊維、アルミナ繊維、およびロックウールなどの無機繊維シートを素材とするものを利用することができる。 Here, as the honeycomb structure, a ceramic fiber sheet, a glass fiber, a silica fiber, an alumina fiber, and an inorganic fiber sheet such as rock wool can be used.
つぎに、本発明の実施例を比較例と共に説明するが、本発明は、これらの実施例に限定されるものではない。 Next, examples of the present invention will be described together with comparative examples, but the present invention is not limited to these examples.
（実施例１）
まず、波板加工したセラミック繊維シートと平板状のセラミック繊維シートを交互に積層してハニカム構造体を形成した。
Example 1
First, a honeycomb structure was formed by alternately laminating corrugated ceramic fiber sheets and flat ceramic fiber sheets.
つぎに、シリカゾルにチタニア微粒子を懸濁させたスラリー（固形分比率；４５重量％ 、シリカとチタニアの比率；２０：８０）を調整した。 Next, a slurry (solid content ratio: 45% by weight, ratio of silica and titania; 20:80) in which titania fine particles are suspended in silica sol was prepared.
そして、このスラリー１Ｋｇに対して、超音波の照射を、出力８０Ｗ、周波数４０ｋＨｚの条件で、６０分間行った。ついで、超音波照射後のスラリーに対し、１Ｋｇの水を添加して粘度の調整を行った。 Then, 1 kg of this slurry was irradiated with ultrasonic waves for 60 minutes under the conditions of an output of 80 W and a frequency of 40 kHz. Then, 1 kg of water was added to the slurry after ultrasonic irradiation to adjust the viscosity.
さらに、スラリーに対して、メタバナジン酸アンモニウム粉末を５０ｇ添加、攪拌後に、脱硝触媒用スラリーに対して３．８８ｍｏｌ／ｌのメタタングステン酸アンモニウム水溶液を５６ｍｌ添加して、最終的に、粘度８４ｍＰａ・ｓの脱硝触媒用スラリーを製造した。 Furthermore, 50 g of ammonium metavanadate powder was added to the slurry, and after stirring, 56 ml of 3.88 mol / l ammonium metatungstate aqueous solution was added to the slurry for the denitration catalyst, and finally the viscosity was 84 mPa · s. A slurry for a denitration catalyst was produced.
(実施例２)
まず、波板加工したセラミック繊維シートと平板状のセラミック繊維シートを交互に積層してハニカム構造体を形成した。
(Example 2)
First, a honeycomb structure was formed by alternately laminating corrugated ceramic fiber sheets and flat ceramic fiber sheets.
つぎに、シリカゾルにチタニア微粒子を懸濁させたスラリー（固形分比率；４５重量％ 、シリカとチタニアの比率；２０：８０）を調整した。 Next, a slurry (solid content ratio: 45% by weight, ratio of silica and titania; 20:80) in which titania fine particles are suspended in silica sol was prepared.
そして、このスラリー１Ｋｇに対して、メタバナジン酸アンモニウム粉末を５０ｇ添加して、脱硝触媒用スラリーの攪拌を行った。 Then, 50 g of ammonium metavanadate powder was added to 1 kg of the slurry, and the slurry for the denitration catalyst was stirred.
さらに、このスラリー１Ｋｇに対して、超音波の照射を、出力８０Ｗ、周波数４０ｋＨｚの条件で、６０分間行った。ついで、超音波照射後のスラリーに対し、１Ｋｇの水を添加して粘度の調整を行った。 Furthermore, 1 kg of this slurry was irradiated with ultrasonic waves for 60 minutes under the conditions of an output of 80 W and a frequency of 40 kHz. Then, 1 kg of water was added to the slurry after ultrasonic irradiation to adjust the viscosity.
つぎに、このスラリーに対して、３．８８ｍｏｌ／ｌのメタタングステン酸アンモニウム水溶液を５６ｍｌ添加して、最終的に、粘度８０ｍＰａ・ｓの脱硝触媒用スラリーを製造した。 Next, 56 ml of a 3.88 mol / l aqueous ammonium metatungstate solution was added to the slurry to finally produce a slurry for a denitration catalyst having a viscosity of 80 mPa · s.
(比較例１)
比較のために、上記実施例２の場合と同様にして、脱硝触媒用スラリーを製造するが、上記実施例２の場合と異なる点は、メタバナジン酸アンモニウム粉末を添加したスラリーに対して、超音波の照射を行なかった点にある。そして、その他の点は上記実施例２の場合と同様にして、脱硝触媒用スラリーを製造したところ、脱硝触媒用スラリーの粘度は、３０ｍＰａ・ｓであった。
(Comparative Example 1)
For comparison, a slurry for a denitration catalyst is produced in the same manner as in Example 2. The difference from Example 2 is that ultrasonic slurry is applied to the slurry to which ammonium metavanadate powder is added. It is in the point that was irradiated. And when the slurry for a denitration catalyst was manufactured similarly to the case of the said Example 2 except for the other points, the viscosity of the slurry for a denitration catalyst was 30 mPa · s.
（脱硝触媒用スラリーの粘度の安定性の評価試験）
つぎに、上記実施例１と２、および比較例１で製造した脱硝触媒用スラリーについて、製造初期の粘度、および脱硝触媒の製造２日後の粘度をそれぞれ計測して、各脱硝触媒用スラリーの粘度の安定性を評価した。各脱硝触媒用スラリーの粘度の計測値を下記の表１に示した。
Next, for the denitration catalyst slurry produced in Examples 1 and 2 and Comparative Example 1, the initial viscosity of the production and the viscosity after 2 days of production of the denitration catalyst were measured, and the viscosity of each denitration catalyst slurry. The stability of was evaluated. The measured value of the viscosity of each denitration catalyst slurry is shown in Table 1 below.
上記の表１の結果から明らかなように、実施例１と２で製造した脱硝触媒用スラリーの製造２日後の粘度は、製造初期の粘度から変化しておらず、非常に安定で、高粘度化が抑制されていることが分かる。これに対し、比較例１で製造した従来の脱硝触媒用スラリーの製造２日後の粘度は、製造初期の粘度に比べ大幅に変化しており、安定していないことが分かる。 As is clear from the results in Table 1 above, the viscosity of the denitration catalyst slurry produced in Examples 1 and 2 after 2 days of production was not changed from the initial viscosity of the production, and was very stable and highly viscous. It can be seen that conversion is suppressed. On the other hand, it can be seen that the viscosity after 2 days of production of the conventional slurry for denitration catalyst produced in Comparative Example 1 has changed significantly compared to the viscosity at the beginning of production and is not stable.
（実施例３）
上記実施例１と２、および比較例１で製造した脱硝触媒用スラリーを用いて脱硝触媒を担持させたハニカム構造体を具備する排ガス脱硝装置について、触媒の脱硝性能試験を図１に示す装置を用いて実施した。ここで、図１中のＭＦＣは、マスフローコントローラーを意味する。
(Example 3)
The exhaust gas denitration apparatus having a honeycomb structure in which a denitration catalyst is supported using the denitration catalyst slurry produced in Examples 1 and 2 and Comparative Example 1 above, the apparatus shown in FIG. Implemented. Here, MFC in FIG. 1 means a mass flow controller.
触媒の脱硝性能試験の条件は、下記の表２に示す通りである。そして、各排ガス脱硝装置について、得られた脱硝率の結果を下記の表３に示した。
上記の表３の結果から明らかなように、上記実施例１と２で製造した脱硝触媒用スラリーを用いて脱硝触媒を担持させたハニカム構造体を具備する排ガス脱硝装置では、比較例１で製造した従来の脱硝触媒用スラリーを用いて脱硝触媒を担持させたハニカム構造体を具備する排ガス脱硝装置に比べて、脱硝率が上昇していることが分かる。 As is clear from the results in Table 3 above, the exhaust gas denitration apparatus having the honeycomb structure carrying the denitration catalyst using the denitration catalyst slurry produced in Examples 1 and 2 is manufactured in Comparative Example 1. It can be seen that the denitration rate is increased as compared with the exhaust gas denitration apparatus having the honeycomb structure in which the denitration catalyst is supported using the conventional slurry for denitration catalyst.
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| JP2008514410A (en) * | 2004-09-30 | 2008-05-08 | ポール・コーポレーション | Catalytically active porous element |
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| JPH03500145A (en) * | 1988-06-29 | 1991-01-17 | クラフトアンラーゲン アクチエンゲゼルシヤフト | Method for producing a plate-like support for a catalytic compound |
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