JPH0975749A - Nox reduction and removal catalyst for low-temperature treatment and its production - Google Patents
Nox reduction and removal catalyst for low-temperature treatment and its productionInfo
- Publication number
- JPH0975749A JPH0975749A JP7263525A JP26352595A JPH0975749A JP H0975749 A JPH0975749 A JP H0975749A JP 7263525 A JP7263525 A JP 7263525A JP 26352595 A JP26352595 A JP 26352595A JP H0975749 A JPH0975749 A JP H0975749A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- activated carbon
- nitrogen oxide
- oxide reduction
- temperature treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 140
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000853 adhesive Substances 0.000 claims abstract description 68
- 230000001070 adhesive effect Effects 0.000 claims abstract description 68
- 229920000620 organic polymer Polymers 0.000 claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 16
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 99
- 229910052751 metal Inorganic materials 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 41
- PIZYHTQSHRQOBI-UHFFFAOYSA-N [C].O=[N] Chemical class [C].O=[N] PIZYHTQSHRQOBI-UHFFFAOYSA-N 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 19
- 239000003822 epoxy resin Substances 0.000 claims description 16
- 229920000647 polyepoxide Polymers 0.000 claims description 16
- 229920000642 polymer Polymers 0.000 claims description 11
- 239000010935 stainless steel Substances 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 122
- 230000000694 effects Effects 0.000 abstract description 10
- 239000000567 combustion gas Substances 0.000 abstract 2
- 239000002699 waste material Substances 0.000 abstract 2
- 238000006722 reduction reaction Methods 0.000 description 40
- 239000007789 gas Substances 0.000 description 36
- 238000002485 combustion reaction Methods 0.000 description 22
- 239000010410 layer Substances 0.000 description 17
- 230000003197 catalytic effect Effects 0.000 description 11
- 239000000428 dust Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 238000001723 curing Methods 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 4
- 238000010531 catalytic reduction reaction Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 238000013035 low temperature curing Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007921 spray 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
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は低温処理用窒素酸化
物還元除去触媒及びその製造方法に関し、特に、燃焼排
ガス中の窒素酸化物を除去するため、燃焼排ガスを１０
０℃前後の比較的低温域で、燃焼排ガスの圧力損失が少
なく処理可能な低温処理用窒素酸化物還元除去触媒及び
その製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nitrogen oxide reduction removal catalyst for low temperature treatment and a method for producing the same, and more particularly, to remove nitrogen oxides in combustion exhaust gas,
The present invention relates to a nitrogen oxide reduction / removal catalyst for low temperature treatment, which can be treated in a relatively low temperature range around 0 ° C. with little pressure loss of combustion exhaust gas, and a method for producing the same.
【０００２】[0002]
【従来の技術】燃焼排ガス等に含有される窒素酸化物
（以下、ＮＯｘとする）は、ＳＯｘと並び大気汚染の元
凶物質として、従来より各種方法が提案され、その除
去、無害化が試みられている。従来法の燃焼排ガスの脱
硝方法としては、アンモニア（ＮＨ3 ）を還元剤に用い
２５０〜４００℃の高温の燃焼排ガスを接触還元する方
法が最も一般的な方法である。特に、ダストを含む排ガ
ス用の脱硝触媒として、各種板状の担体に触媒金属を焼
結担持させたものが知られている。例えば、特開昭５３
−１４５８８４号、同５５−７３３４８号、同６３−１
１１９４５号、特開平１−３０４０５１号等の公報で
は、板状の担体の形状や、その表面の各種形状にするこ
とにより、耐熱衝撃性を高めたり、触媒金属を飛散する
ことなく高活性を維持するように金属板上に担持する方
法が提案されている。また、燃焼排ガス中のＳＯｘによ
る脱硝触媒の担体の腐食や触媒金属の劣化を防止するこ
とも提案されている。2. Description of the Related Art Nitrogen oxides (hereinafter referred to as NOx) contained in flue gas and the like have been proposed as various sources of air pollution along with SOx, and various methods have been proposed and attempts have been made to remove and detoxify them. ing. As a conventional method for denitration of combustion exhaust gas, the most common method is to use ammonia (NH 3 ) as a reducing agent to catalytically reduce combustion exhaust gas at a high temperature of 250 to 400 ° C. In particular, as denitration catalysts for exhaust gas containing dust, there are known catalysts obtained by sintering and supporting a catalyst metal on various plate-shaped carriers. For example, JP-A-53
145884, 55-73348, 63-1
In Japanese Patent Laid-Open Nos. 11945 and 1-304051 and the like, the shape of a plate-shaped carrier and various shapes of the surface thereof are used to enhance thermal shock resistance and maintain high activity without scattering catalyst metal. A method of supporting on a metal plate has been proposed. It has also been proposed to prevent corrosion of the denitration catalyst carrier and deterioration of the catalyst metal due to SOx in the combustion exhaust gas.
【０００３】発明者らは、燃焼排ガスの処理方法とし
て、予め排ガスを脱硫処理しＳＯｘを除去した後、特
に、湿式脱硫処理し１００℃前後の排ガス中のＮＯｘを
除去すること検討し、そのための脱硝触媒を提案した。
例えば、特開平７−８２３号公報、特開平７−１６４６
８号公報等で、１００℃前後で高脱硝活性を発現し燃焼
排ガス中のＮＯｘを選択的に還元除去する燃焼排ガス還
元接触用活性炭触媒を提案した。As a method for treating combustion exhaust gas, the present inventors have studied, in advance, that the exhaust gas is desulfurized to remove SOx, and in particular, wet desulfurization is performed to remove NOx in the exhaust gas at around 100 ° C. A denitration catalyst was proposed.
For example, Japanese Patent Laid-Open No. 7-823 and Japanese Patent Laid-Open No. 7-1646.
No. 8, etc., proposed an activated carbon catalyst for catalytic reduction of combustion exhaust gas, which exhibits high denitration activity around 100 ° C. and selectively reduces and removes NOx in combustion exhaust gas.
【０００４】[0004]
【発明が解決しようとする課題】上記提案の活性炭脱硝
触媒は、前記したように比較的低温の排ガス中のＮＯｘ
を高脱硝率で安定して接触還元除去でき、工業的に実用
性が高く有用である。しかしながら、通常、粒状活性炭
に各種の触媒金属を担持するものであり、実装置として
は、粒状活性炭触媒を充填した触媒充填層に排ガスを通
過させるようにした固定層方式や、充填層中の活性炭触
媒を移動させる移動層方式のものとなる。この場合、粉
塵等のダストを含む燃焼排ガスを処理する場合、前記し
た高温脱硝処理と同様に、ダストが触媒層中に堆積して
圧力損失が増加したり、触媒機能が低下する等の不都合
が生じるという問題がある。また、移動層方式では、活
性炭触媒の移動による破損が生じ、同様に触媒活性が低
下し、また、移動層保持にも不都合が生じる等の問題が
あった。SUMMARY OF THE INVENTION The activated carbon denitration catalyst proposed above is used for NOx in exhaust gas at a relatively low temperature as described above.
Can be stably removed by catalytic reduction with a high denitration rate, and is industrially highly practical and useful. However, in general, various types of catalytic metals are supported on granular activated carbon, and as an actual device, a fixed bed system in which exhaust gas is passed through a catalyst packed bed filled with granular activated carbon catalyst, or activated carbon in the packed bed is used. It is a moving bed type in which the catalyst is moved. In this case, when treating a combustion exhaust gas containing dust such as dust, similar to the above-described high-temperature denitration treatment, dust accumulates in the catalyst layer to increase pressure loss, and there is a disadvantage that the catalytic function is deteriorated. There is a problem that it will occur. Further, in the moving bed system, there is a problem that the activated carbon catalyst is damaged due to the movement thereof, the catalytic activity is similarly lowered, and the moving bed retention is also inconvenient.
【０００５】本発明は、上記の粒状活性炭脱硝触媒をダ
ストを含む燃焼排ガスを処理する実装置に適用する場合
の不都合に鑑み、それらの不都合を解消し高活性の粒状
活性炭脱硝触媒を用いて低温で燃焼排ガス中のＮＯｘを
安定して効率よく圧損失少なく高脱硝率で除去する方法
を提供することを目的とする。発明者らは、この目的の
ため、前記高温脱硝処理の板状脱硝触媒を、粒状活性炭
脱硝触媒に適用することを検討した。しかし、前記した
ように従来の板状脱硝触媒は、セラミックス板、金属板
等の板状体を担体とし、その上に触媒金属を担持するも
のであるのに対し、本発明ににおいては粒状活性炭を担
体として触媒金属が担持される点で異なり、また、従来
の触媒金属担持は、通常約４００〜６００℃の高温で焼
成担持するものであり、粒状活性炭触媒にそのまま適用
することはできない。そのため、発明者等は、従来の板
状脱硝触媒の形態的効果を保持させると共に、粒状活性
炭脱硝触媒の触媒活性及び粒状活性炭の高表面積を損な
うことのない触媒について鋭意検討した。その結果、金
属板上面に所定の有機高分子系接着剤で活性炭を接合保
持させることにより、所定の間隙を有して触媒層を形成
でき、圧損失も殆どなく１００℃前後の低温燃焼排ガス
中のＮＯｘを効果的に還元接触除去できることを見出
し、本発明に到った。In view of the inconveniences when the above-mentioned granular activated carbon denitration catalyst is applied to an actual apparatus for treating combustion exhaust gas containing dust, the present invention eliminates these inconveniences and uses a highly active granular activated carbon denitration catalyst to obtain a low temperature. It is an object of the present invention to provide a method for stably and efficiently removing NOx in combustion exhaust gas with a high NOx removal rate with a low pressure loss. For this purpose, the inventors have studied to apply the plate-shaped denitration catalyst of the high temperature denitration treatment to a granular activated carbon denitration catalyst. However, as described above, the conventional plate-shaped denitration catalyst uses a plate-shaped body such as a ceramic plate or a metal plate as a carrier, and carries a catalyst metal thereon, whereas in the present invention, the granular activated carbon is used. The catalyst metal is different from the above in that the catalyst metal is supported as a carrier, and the conventional catalyst metal support is generally carried by firing at a high temperature of about 400 to 600 ° C., and cannot be directly applied to the granular activated carbon catalyst. Therefore, the inventors have made earnest studies on a catalyst that retains the morphological effect of the conventional plate-like denitration catalyst and does not impair the catalytic activity of the granular activated carbon denitration catalyst and the high surface area of the granular activated carbon. As a result, by bonding and holding the activated carbon with the predetermined organic polymer adhesive on the upper surface of the metal plate, the catalyst layer can be formed with a predetermined gap, and there is almost no pressure loss in low temperature combustion exhaust gas around 100 ° C. The inventors have found that NOx can be effectively removed by catalytic reduction, and have reached the present invention.
【０００６】[0006]
【課題を解決するための手段】本発明によれば、金属製
平板基材上に、有機高分子系接着剤硬化層を介して粒状
活性炭窒素酸化物還元触媒を粒状に接合保持してなる低
温処理用窒素酸化物還元除去触媒が提供される。本発明
の低温処理用窒素酸化物還元除去触媒において、金属製
平板基材が、軟鋼またはステンレス鋼であることが好ま
しい。また、粒状活性炭窒素酸化物還元触媒の粒径が
０．１〜５ｍｍの範囲であることが好ましい。更に、有
機高分子系接着剤硬化層が、約０．０１〜１．０ｍｍで
あり、エポキシ樹脂系接着剤で形成されていることが好
ましく、また、エポキシ樹脂系接着剤が、２液混合型で
常温硬化性接着剤であることが好ましい。According to the present invention, a low temperature catalyst comprising granular activated carbon nitrogen oxide reduction catalysts bonded and held in granular form on a metal flat plate substrate through an organic polymer adhesive cured layer. A treatment nitrogen oxide reduction removal catalyst is provided. In the nitrogen oxide reduction removal catalyst for low temperature treatment of the present invention, the metal flat plate base material is preferably mild steel or stainless steel. The particle size of the granular activated carbon nitrogen oxide reduction catalyst is preferably in the range of 0.1 to 5 mm. Furthermore, the organic polymer adhesive cured layer is about 0.01 to 1.0 mm, and is preferably formed of an epoxy resin adhesive, and the epoxy resin adhesive is a two-liquid mixed type. Therefore, a room temperature curable adhesive is preferable.
【０００７】本発明の低温処理用窒素酸化物還元除去触
媒は上記のように構成され、高活性の粒状活性炭窒素酸
化物還元触媒が、金属平板基板上に有機高分子系接着剤
で粒状を保持され硬化接合されていることから、粒状活
性炭窒素酸化物還元触媒の触媒性能を損なわれることな
く、優れた触媒活性が保持され有効に発現することがで
きる。そのため、圧損失を抑制するように充填層を形成
でき、安定して１００℃前後の低温燃焼排ガス中のＮＯ
ｘを還元除去することができる。The nitrogen oxide reduction and removal catalyst for low temperature treatment of the present invention is constructed as described above, and the highly active granular activated carbon nitrogen oxide reduction catalyst retains the particles on the flat metal substrate with the organic polymer adhesive. Since they are hardened and bonded, excellent catalytic activity can be retained and effectively exhibited without impairing the catalytic performance of the granular activated carbon nitrogen oxide reduction catalyst. Therefore, the packed bed can be formed so as to suppress the pressure loss, and the NO in the low temperature combustion exhaust gas at around 100 ° C can be stably obtained.
x can be reduced and removed.
【０００８】また、本発明は、金属製平板基材上に、約
１，０００〜１０，０００ｐの粘性を有する有機高分子
系接着剤を塗布した後、該高分子接着剤塗布面に粒状活
性炭窒素酸化物還元触媒を付着させ１５０℃以下で該高
分子接着剤を硬化させることを特徴とする低温処理用窒
素酸化物還元除去触媒の製造方法を提供する。この低温
処理用窒素酸化物還元除去触媒の製造方法において、有
機高分子接着剤が、２液混合型の常温硬化性エポキシ樹
脂系接着剤であることが好ましく、前記付着が、粒状活
性炭窒素酸化物還元触媒を前記高分子接着剤塗布面に散
布して行うこと、または、粒状活性炭窒素酸化物還元触
媒を保持する容器内に、高分子接着剤を塗布した金属製
平板基材を配置して行うことが好ましい。Further, according to the present invention, an organic polymer adhesive having a viscosity of about 1,000 to 10,000 p is coated on a metal flat plate base material, and then granular activated carbon is applied to the polymer adhesive coated surface. Provided is a method for producing a nitrogen oxide reduction removal catalyst for low temperature treatment, which comprises depositing a nitrogen oxide reduction catalyst and curing the polymer adhesive at 150 ° C. or lower. In this method for producing a catalyst for reducing and removing nitrogen oxides for low-temperature treatment, the organic polymer adhesive is preferably a two-part mixed type room temperature curable epoxy resin adhesive, and the adhesion is a granular activated carbon nitrogen oxide. The reduction catalyst is sprinkled on the polymer adhesive-coated surface, or the metal flat plate base material coated with the polymer adhesive is placed in a container holding the granular activated carbon nitrogen oxide reduction catalyst. It is preferable.
【０００９】本発明の低温処理用窒素酸化物還元除去触
媒の製造方法は上記のように構成され、粒状活性炭窒素
酸化物還元触媒を有機高分子系接着剤を用い、低温硬化
により金属板上に簡便に粒状を保持しつつ接合すること
ができる。従って、粒状活性炭窒素酸化物還元触媒本来
の優れた触媒性能をそのまま維持する板状の低温処理用
窒素酸化物還元除去触媒を得ることができる。The method for producing a nitrogen oxide reduction removal catalyst for low temperature treatment of the present invention is constructed as described above, and the granular activated carbon nitrogen oxide reduction catalyst is applied on a metal plate by low temperature curing using an organic polymer adhesive. It is possible to easily join while maintaining the granularity. Therefore, it is possible to obtain a plate-like catalyst for reducing and removing nitrogen oxides for low-temperature treatment, which maintains the original excellent catalytic performance of the granular activated carbon nitrogen oxides reducing catalyst.
【００１０】[0010]
【発明の実施の形態】以下、本発明を詳細に説明する。
本発明の金属製平板基材は、粒状活性炭窒素酸化物還元
触媒を間隙を有して充填可能とするための支持体であ
り、粒状活性炭窒素酸化物還元触媒及びその保持用の接
着硬化層を形成する有機高分子系接着剤に対し不活性で
あり、有機高分子系接着剤との接着性が良く、脱硝処理
時において十分な強度と耐食性を持つものであれば特に
制限されるものでない。通常、軟鋼、ステンレス鋼が用
いられる。また、金属製平板基材の厚さは、特に制限さ
れず、使用する還元脱硝処理条件等により必要な強度か
ら適宜選択することができる。通常、０．２〜１．０ｍ
ｍの厚さのものが用いられる。また、その大きさ、形状
も特に制限されるものでなく、使用する排ガス脱硝装置
の処理能力に応じて適宜選択することができる。通常、
取扱いの便宜上、矩形の約２０×５０〜１００×２００
（ｃｍ2 ）のものが用いられる。なお、本発明におい
て、金属製平板基材は、単に平板状体のみでなく、金属
製平板により形成可能な形状体、例えば、四角、三角、
円等の各種断面形状の筒状体、格子形状体等も含むもの
である。通常、下記するように、有機高分子系接着剤を
表面に塗布して接合層を形成するため、平板状体に粒状
活性炭窒素酸化物還元触媒を接合後、所望形状に形成す
ることが好ましい。金属製平板基材表面は、通常の仕上
げ加工の平坦面を有するものでよく、要すればブラスト
加工して表面を清浄にすると同時に微細凹凸を形成して
接着性を高めてもよい。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
The metal flat plate substrate of the present invention is a support for allowing the granular activated carbon nitrogen oxide reduction catalyst to be filled with a gap, and the granular activated carbon nitrogen oxide reduction catalyst and the adhesive cured layer for holding the same. There is no particular limitation as long as it is inert to the organic polymer adhesive to be formed, has good adhesiveness with the organic polymer adhesive, and has sufficient strength and corrosion resistance during denitration treatment. Usually, mild steel and stainless steel are used. Moreover, the thickness of the metal flat plate base material is not particularly limited, and can be appropriately selected from the required strength depending on the reduction denitration treatment conditions used and the like. Usually 0.2 to 1.0 m
The thickness of m is used. Further, its size and shape are not particularly limited, and can be appropriately selected according to the treatment capacity of the exhaust gas denitration device used. Normal,
For convenience of handling, a rectangular shape of about 20 × 50 to 100 × 200
(Cm 2 ) is used. In the present invention, the metal flat plate base material is not only a flat plate-shaped body, but also a shape body that can be formed by a metal flat plate, for example, a square, a triangle,
It also includes cylindrical bodies having various cross-sectional shapes such as circles and lattice-shaped bodies. Usually, as described below, an organic polymer adhesive is applied to the surface to form a bonding layer. Therefore, it is preferable to bond the granular activated carbon nitrogen oxide reduction catalyst to a flat body and then form it into a desired shape. The surface of the metal flat plate base material may have a flat surface that is normally finished, and if necessary, blasting may be performed to clean the surface and simultaneously form fine irregularities to improve adhesiveness.
【００１１】本発明において、上記金属製平板基材上に
接合保持する粒状活性炭窒素酸化物還元触媒は、８０〜
１５０℃の低温域での低温脱硝活性を持つものなら、い
ずれも使用できる。例えば、椰子殻活性炭、石炭系活性
炭、フェノール樹脂系活性炭の単独または活性成分を担
持した活性炭触媒が使用される。また、本発明では、金
属製平板基材に活性炭脱硝触媒そのものが接着できるた
め、特に、粒状活性炭に所定の触媒成分、例えば、バナ
ジウム等の金属酸化物や水溶性のハロゲン化物等を所定
量担持した還元脱硝用活性炭触媒をそのまま用いること
ができ、低温用排ガス窒素酸化物還元除去用触媒として
効果的である。粒状活性炭としては、０．１〜５ｍｍの
粒径のものが好ましく、より好ましくは０．３〜１ｍｍ
の粒径のものがよい。有機高分子系接着硬化層を介して
金属製平板基材に接合するため、０．１ｍｍ未満の粒径
では、接着硬化層中に活性炭触媒粒子の大半部分が埋没
し触媒活性が十分に発現されず、一方、粒径が５ｍｍを
超えると粒子を接合保持するための有機高分子系位接着
剤の使用量が増加し好ましくない。In the present invention, the granular activated carbon nitrogen oxide reduction catalyst bonded and held on the above-mentioned metal flat plate base material is 80 to
Any material having low-temperature denitration activity in the low temperature range of 150 ° C can be used. For example, coconut shell activated carbon, coal-based activated carbon, phenol resin-based activated carbon alone or an activated carbon catalyst carrying an active component is used. Further, in the present invention, since the activated carbon denitration catalyst itself can be adhered to the metal flat plate base material, in particular, the granular activated carbon has a predetermined catalyst component, for example, a predetermined amount of a metal oxide such as vanadium or a water-soluble halide supported thereon. The activated carbon catalyst for reduction denitration can be used as it is and is effective as a catalyst for reducing and removing exhaust gas nitrogen oxides for low temperature. The granular activated carbon preferably has a particle size of 0.1 to 5 mm, more preferably 0.3 to 1 mm.
The particle size of Since it is bonded to the metal flat plate base material through the organic polymer-based adhesive hardened layer, most of the activated carbon catalyst particles are buried in the adhesive hardened layer with a particle size of less than 0.1 mm, and the catalytic activity is sufficiently expressed. On the other hand, if the particle size exceeds 5 mm, the amount of the organic polymer adhesive used to bond and hold the particles increases, which is not preferable.
【００１２】本発明において、上記金属製平板基材上に
有機高分子系接着硬化層を介して粒状に接合保持された
粒状活性炭窒素酸化物還元触媒は、ミクロ的には粒状活
性炭触媒が金属製平板基材上に均等に単一層で配列さ
れ、金属平板基材表面に接する点のみで有機高分子系接
着硬化層で接合されることが好ましい。しかし、保持耐
久性や実効性から粒径の約１／２０〜１／５の範囲で埋
没されることが好ましい。埋没が粒径の１／２０未満で
あれば、使用耐久性が低下するおそれがあり好ましくな
い。また、１／５を超えて埋没した場合は、触媒活性が
発現できないためである。金属製平板基材上の粒子状活
性炭窒素酸化物還元触媒は、上記のように単一層で各粒
子が接するように配列されることが好ましい。また、粒
子状活性炭窒素酸化物還元触媒は、金属製平板基材の片
面または両面のいずれに接合保持されてもよく、使用条
件や基材形状に合わせて適宜選択することができる。通
常、両面に粒子状活性炭窒素酸化物還元触媒を接合す
る。In the present invention, the granular activated carbon nitrogen oxide reduction catalyst, which is joined and held in a granular form on the above-mentioned metallic flat plate substrate through the organic polymer type adhesive hardening layer, is a granular activated carbon catalyst made of a metallic material. It is preferable that they are evenly arranged in a single layer on the flat plate base material and bonded by the organic polymer adhesive cured layer only at the point of contact with the surface of the metal flat plate base material. However, it is preferable that the particles are buried within a range of about 1/20 to 1/5 of the particle size from the viewpoint of holding durability and effectiveness. If the embedding is less than 1/20 of the particle size, the use durability may decrease, which is not preferable. In addition, if it is buried more than 1/5, the catalytic activity cannot be expressed. It is preferable that the particulate activated carbon nitrogen oxide reduction catalyst on the metal flat plate substrate is arranged so that the particles are in contact with each other in a single layer as described above. Further, the particulate activated carbon nitrogen oxide reduction catalyst may be bonded and held on one side or both sides of the flat metal substrate, and can be appropriately selected according to the use conditions and the shape of the substrate. Usually, a particulate activated carbon nitrogen oxide reduction catalyst is bonded to both surfaces.
【００１３】本発明において、粒子状活性炭窒素酸化物
還元触媒を金属製平板基材に接合保持するための接合剤
としては有機高分子系接着剤を用いる。有機高分子系接
着剤の硬化層は、燃焼排ガス中のＮＯｘを活性炭脱硝触
媒を用いて接触還元除去処理する場合、通常、約８０〜
１５０℃の低温領域で実施され、この温度領域で耐熱性
と接着性を有し、長期的に安定して粒状活性炭窒素酸化
物還元触媒を金属製平板基材上に保持することができる
ためである。一般的通常の接着剤では、接合強度が弱く
安定した触媒性能を得ることができない。有機高分子系
接着剤硬化層は、粒状活性炭触媒を粒状に接合保持でき
ればよく、通常、１０〜１，０００μｍの厚さに形成す
る。有機高分子系接着剤としては、例えば、エポキシ樹
脂系、フェノール樹脂系、シリコーン樹脂系、ニトリル
ゴム系接着剤が挙げられる。これら有機高分子系接着剤
であって、好ましくは、有機溶剤を含むことなく、約
１，０００〜１０，０００ｐの粘性のものが好ましい。
その硬化層に粒状活性炭触媒を接合保持することが容易
であり、また、活性炭が有する細孔中に接合剤が浸入し
て細孔を閉塞し、触媒活性を低下するおそれがないため
である。上記有機高分子系接着剤のうち、特に、エポキ
シ樹脂系接着剤が好ましい。優れた耐熱性と接着性を持
つためである。エポキシ樹脂系接着剤としては、溶剤を
混合した加熱硬化型のものが多いが、これらの加熱硬化
型エポキシ樹脂系接着剤を用いた場合は、上記したよう
に加熱硬化時に溶剤が活性炭触媒の細孔中に侵入し、細
孔内の触媒活性表面を覆って触媒活性を低下させるおそ
れがあり、有機溶剤を含まない２液混合型の常温硬化性
エポキシ樹脂系接着剤が好適に用いられる。また、２液
混合型の常温硬化性エポキシ樹脂系接着剤は、粘性が比
較的高く、金属性平板基材表面に塗布後に流動するおそ
れがなく、活性炭触媒の接合作業性も向上し好ましい。In the present invention, an organic polymer adhesive is used as a bonding agent for bonding and holding the particulate activated carbon nitrogen oxide reduction catalyst to the metal flat plate substrate. When the NOx in the combustion exhaust gas is subjected to catalytic reduction removal treatment using an activated carbon denitration catalyst, the hardened layer of the organic polymer adhesive is usually about 80-
It is carried out in a low temperature region of 150 ° C., and it has heat resistance and adhesiveness in this temperature region, and can stably retain the granular activated carbon nitrogen oxide reduction catalyst on the metal flat plate substrate. is there. Generally, ordinary adhesives have weak bonding strength and cannot obtain stable catalytic performance. It suffices that the organic polymer adhesive cured layer can hold the granular activated carbon catalyst in a granular form, and is usually formed to have a thickness of 10 to 1,000 μm. Examples of organic polymer adhesives include epoxy resin adhesives, phenol resin adhesives, silicone resin adhesives, and nitrile rubber adhesives. Of these organic polymer adhesives, those having a viscosity of about 1,000 to 10,000 p, preferably containing no organic solvent, are preferable.
This is because it is easy to bond and hold the granular activated carbon catalyst in the hardened layer, and there is no possibility that the bonding agent enters the pores of the activated carbon to block the pores and reduce the catalyst activity. Among the above organic polymer adhesives, epoxy resin adhesives are particularly preferable. This is because it has excellent heat resistance and adhesiveness. Most of the epoxy resin adhesives are heat-curable ones mixed with a solvent, but when these heat-curable epoxy resin adhesives are used, as described above, the solvent is a fine mixture of activated carbon catalyst during heat curing. A two-liquid mixed type room temperature curable epoxy resin-based adhesive containing no organic solvent may be preferably used because it may penetrate into the pores and cover the catalytically active surface in the pores to lower the catalytic activity. Further, the two-component mixed type room temperature curable epoxy resin adhesive is preferable because it has a relatively high viscosity, there is no risk of fluidization after coating on the surface of the metallic flat substrate, and the workability of the activated carbon catalyst is improved.
【００１４】本発明の低温処理用窒素酸化物還元除去触
媒は、上記の金属製平板基材の片面または両面上に有機
高分子系接着剤を所定の厚さに塗布し、接着剤の硬化前
に、粒状活性炭窒素酸化物還元触媒を付着させ、塗布接
着剤層の硬化と共に接合固定して得ることができる。塗
布は、その粘度にもよるが、通常、ローラや刷毛塗りで
行うことができる。有機高分子系接着剤の硬化は、常温
硬化性であれば常温に放置して行うことができるが、一
般的には、１５０℃以下の温度で加熱して硬化させるこ
とにより、作業時間の短縮と短時間で高接合強度を得る
ことができ好ましい。また、接着剤塗布面への粒状活性
炭窒素酸化物還元触媒の付着は、粒状触媒が塗布面全域
にほぼ単一層で均等な配列形態をとるように行える方法
であれば特に制限されるものでない。例えば、金属製平
板基材上の接着剤塗布面に対し上方の平行面から粒状活
性炭窒化酸化物還元触媒を均一に散布して付着させる方
法や、粒状活性炭窒素酸化物還元触媒を保持する所定の
容器内に、接着剤塗布面を有する金属性平板基材を水平
等所定に載置したり、垂直方向等所定方向に挿入して粒
状活性炭触媒を付着させる方法等で付着し、その後、非
付着粒状活性炭触媒を振り落とす等により行うことがで
きる。The catalyst for reduction and removal of nitrogen oxides for low temperature treatment of the present invention is prepared by applying an organic polymer adhesive to a predetermined thickness on one or both sides of the above-mentioned metallic flat base material, and before curing the adhesive. Then, a granular activated carbon nitrogen oxide reduction catalyst may be adhered to, and the adhesive layer may be bonded and fixed together with curing of the coated adhesive layer. The coating can be usually performed with a roller or a brush although it depends on its viscosity. The organic polymer-based adhesive can be cured by leaving it at room temperature if it is curable at room temperature, but in general, the working time can be shortened by heating and curing at a temperature of 150 ° C. or lower. It is preferable because high bonding strength can be obtained in a short time. Further, the adhesion of the granular activated carbon nitrogen oxide reduction catalyst to the adhesive coated surface is not particularly limited as long as it is a method that allows the granular catalyst to take an even array form in a substantially single layer over the entire coated surface. For example, a method of evenly dispersing and adhering the granular activated carbonitride oxide reduction catalyst from the parallel surface above the adhesive application surface on the flat metal substrate, or a predetermined method for holding the granular activated carbon nitrogen oxide reduction catalyst. Attach the metal flat plate base material with the adhesive application surface in a predetermined direction such as horizontal in the container, or insert it in a predetermined direction such as vertical direction to attach the granular activated carbon catalyst, and then attach it, then non-attach It can be carried out by shaking off the granular activated carbon catalyst.
【００１５】本発明の低温処理用窒素酸化物還元除去触
媒は、上記のように低温域での還元脱硝活性が高い活性
炭脱硝触媒を、粒状活性炭触媒として金属性平板基材表
面に有機高分子系接着剤硬化層を介して接合するもので
あり、８０〜１５０℃の低温燃焼排ガスの還元脱硝処理
に対し充分な耐久性を有し、活性炭脱硝触媒の高活性も
維持でき、しかも、活性炭脱硝触媒で最も問題となって
いる圧損失も解消できる。また、従来の板状脱硝触媒に
あっては、２５０〜４００℃の高温での脱硝処理を目的
として提案されており、酸化物触媒粒子をウオッシュコ
ート法で金属製平板基材状に付着させ、その後、４００
〜６００℃の高温で焼成して担持させる必要があるのに
対し、本発明の低温処理用窒素酸化物還元除去触媒は、
これらの煩雑な操作が全く不要となり、金属平板基材上
への接着剤塗布、粒状活性炭触媒付着、硬化接合固定の
簡便な操作で製造することができる。The nitrogen oxide reduction removal catalyst for low temperature treatment of the present invention comprises an activated carbon denitration catalyst having a high reductive denitration activity in the low temperature region as described above, and an organic polymer based catalyst on the surface of a metallic flat plate as a granular activated carbon catalyst. It is bonded through an adhesive cured layer, has sufficient durability against reduction denitration treatment of low temperature combustion exhaust gas at 80 to 150 ° C., can maintain high activity of the activated carbon denitration catalyst, and is also an activated carbon denitration catalyst. The pressure loss, which is the most problematic in, can be eliminated. Further, in the conventional plate-like denitration catalyst, it has been proposed for the purpose of denitration treatment at a high temperature of 250 to 400 ° C., and oxide catalyst particles are attached to a metal flat plate base material by a wash coat method, Then 400
While it is necessary to calcinate and support at a high temperature of up to 600 ° C., the nitrogen oxide reduction removal catalyst for low temperature treatment of the present invention is
These complicated operations are not required at all, and the production can be carried out by simple operations such as application of an adhesive on a flat metal plate substrate, adhesion of a granular activated carbon catalyst, and fixing by curing and bonding.
【００１６】本発明の板状の低温処理用窒素酸化物還元
除去触媒を燃焼排ガスの脱硝処理に適用する場合には、
所定の金属製容器内に一定間隔、例えば１〜６ｍｍの間
隙を有して、燃焼排ガスの導入口に対向して間隙を有す
るように平行に多数並列させたり、格子状に配列して排
ガス脱硝反応器を形成することができる。このように形
成された反応器に導入された低温燃焼排ガスは、所定に
配列された板状の触媒の間隙部を平板面と平行に流通し
て通過することができるため、活性炭触媒の固定充填層
のような圧損失が生じることがなく、また、移動充填層
のような活性炭触媒の破損等もない。更に、燃焼排ガス
中にダストが存在していても殆ど堆積することなく、反
応器を閉塞させることがない。従って、安定して長期間
円滑に排ガス中のＮＯｘを還元除去することができる。
また、本発明の板状の低温処理用窒素酸化物還元除去触
媒では金属製平板基材に比較的大きな活性炭粒子を接合
固定させるため、触媒表面が粗面となりガスの拡散が良
いという利点もある。When the plate-like catalyst for reducing nitrogen oxides for low temperature treatment of the present invention is applied to denitration of combustion exhaust gas,
Exhaust gas denitration by arranging in parallel in a predetermined metal container with a constant gap, for example, 1 to 6 mm, in parallel so as to face the inlet of combustion exhaust gas and having a gap, or by arranging in a grid pattern. A reactor can be formed. The low-temperature combustion exhaust gas introduced into the reactor thus formed can pass through the gap between the plate-shaped catalysts arranged in a predetermined manner in parallel with the flat plate surface, so that the activated carbon catalyst is fixedly packed. There is no pressure loss as in the bed, and there is no damage to the activated carbon catalyst as in the moving packed bed. Furthermore, even if dust is present in the flue gas, it hardly deposits and does not clog the reactor. Therefore, NOx in the exhaust gas can be reduced and removed stably and smoothly for a long period of time.
Further, in the plate-like nitrogen oxide reduction removal catalyst for low-temperature treatment of the present invention, since relatively large activated carbon particles are bonded and fixed to a metal plate base material, there is also an advantage that the catalyst surface becomes rough and gas diffusion is good. .
【００１７】[0017]
【実施例】以下、本発明を実施例に基づき更に詳細に説
明する。但し、本発明は下記実施例により制限されるも
のでない。 実施例１ 厚さ０．３ｍｍ、３．０×６０（ｃｍ）のステンレス鋼
板の両面に、２液混合型で常温硬化のエポキシ樹脂接着
剤を、約５０μｍの厚さにローラを用いて塗布した。ま
た、粒径０．５〜０．８５ｍｍの粒状活性炭に、脱硝触
媒成分としてバナジウム酸化物及びモリブデン酸化物を
浸漬含浸、乾燥、焼成して、また、臭化アンモニウムを
浸漬含浸、乾燥して担持した。上記のようにして形成し
たステンレス鋼板の両塗布面に散布付着方法により、上
記触媒成分を担持した粒状活性炭脱硝触媒を付着させ
た。その後非付着活性炭触媒を払い落として取除いた
後、８０℃で１時間加熱してエポキシ樹脂接着剤を硬化
させて、接着剤層約５０μｍ、活性炭触媒層約０．７ｍ
ｍの板状の低温処理用窒素酸化物還元除去触媒を製造し
た。得られた板状の低温処理用窒素酸化物還元除去触媒
を、直方体形状の反応器内に、各間隙を板状触媒の中心
から中心で３．５ｍｍの等間隔として、ガス導入口から
ガス排出口方向に平行で、垂直に配設して燃焼排ガスの
脱硝反応器を形成した。この脱硝反応器に、ＮＯｘ２０
０ｐｐｍ、ＮＨ3 １９０ｐｐｍ、Ｏ2 ５％、ＣＯ2 １２
％、Ｈ2 Ｏ９％、残りＮ2 ガスからなるガスに、更に石
炭焚ボイラーの電気集塵機出口ガスより採取したフライ
アッシュを５０ｍｇ／Ｎｍ3 の煤塵濃度になるように添
加して調製した模擬排ガスを、温度１００℃、空間速度
（ＳＶ）２，４００ｈｒ-1で流通させ処理した。その結
果、５００時間にわたりほぼ８０％の脱硝率が維持され
た。また、板状活性炭脱硝触媒の充填部の圧力損失は１
０ｍｍＨ2 Ｏと極めて少なかった。更に、５００時間の
処理終了後、反応器より板状活性炭脱硝触媒を取りだ
し、目視観察の結果、煤塵の堆積や活性炭触媒粒子の剥
離も殆どなかった。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to embodiments. However, the present invention is not limited by the following examples. Example 1 A two-liquid mixed type, room temperature-curable epoxy resin adhesive was applied to both surfaces of a stainless steel plate having a thickness of 0.3 mm and a size of 3.0 × 60 (cm) using a roller to a thickness of about 50 μm. . In addition, vanadium oxide and molybdenum oxide as denitration catalyst components are dipped and impregnated into granular activated carbon having a particle size of 0.5 to 0.85 mm, dried and fired, and ammonium bromide is dipped and impregnated, dried and carried. did. A granular activated carbon denitration catalyst carrying the above catalyst components was adhered to both coated surfaces of the stainless steel plate formed as described above by a spray adhesion method. Then, after removing the non-adhered activated carbon catalyst by removing it, the epoxy resin adhesive is cured by heating at 80 ° C. for 1 hour to form an adhesive layer of about 50 μm and an activated carbon catalyst layer of about 0.7 m.
m plate-shaped catalyst for reduction and removal of nitrogen oxides for low temperature treatment was produced. The obtained plate-shaped catalyst for reduction and removal of nitrogen oxides for low-temperature treatment was placed in a rectangular parallelepiped-shaped reactor, and each gap was equidistant from the center of the plate-shaped catalyst to 3.5 mm. The NOx reactor for combustion exhaust gas was formed by arranging it in parallel with the outlet direction and vertically. NOx20 is added to this denitration reactor.
0 ppm, NH 3 190 ppm, O 2 5%, CO 2 12
%, H 2 O 9%, and the remaining N 2 gas, a simulated exhaust gas prepared by adding fly ash collected from the gas exiting the electrostatic precipitator of a coal-fired boiler to a dust concentration of 50 mg / Nm 3 At a temperature of 100 ° C. and a space velocity (SV) of 2,400 hr −1 . As a result, a denitration rate of approximately 80% was maintained for 500 hours. Moreover, the pressure loss in the packed portion of the plate-like activated carbon denitration catalyst is 1
It was extremely small, 0 mmH 2 O. Furthermore, after the completion of the treatment for 500 hours, the plate-like activated carbon denitration catalyst was taken out from the reactor, and as a result of visual observation, there was almost no accumulation of soot dust or peeling of the activated carbon catalyst particles.
【００１８】実施例２ 厚さ０．３ｍｍ，３×６０（ｃｍ）のステンレス鋼板の
両面に、１液加熱硬化のエポキシ樹脂接着剤を、約４０
μｍの厚さにローラを用い塗布した。上記のようにして
形成したステンレス鋼板の両塗布面に、実施例１に用い
たものと同様の触媒成分を担持した粒状活性炭脱硝触媒
を、同様に付着させて非付着活性炭触媒を払い落として
取除いた。その後、１００℃で１時間加熱してエポキシ
樹脂を硬化させ、接着剤層約４０μｍ、活性炭触媒層約
０．７ｍｍの板状の低温処理用窒素酸化物除去触媒を製
造した。得られた板状の低温処理用窒素酸化物還元除去
触媒を、実施例１と同様にして燃焼排ガスの脱硝反応器
を形成して、同様に模擬排ガスに対する脱硝性能を測定
した。その結果、５００時間にわたり脱硝率７０％が維
持された。また、板状活性炭脱硝触媒の充填部の圧力損
失は９ｍｍＨ2 Ｏと極めて少なかった。更に、５００時
間処理終了後、反応器より板状活性炭脱硝触媒を取り出
し、目視観察した結果、煤塵の堆積や活性炭触媒粒子の
剥離も殆どなかった。Example 2 A 1-component heat-curable epoxy resin adhesive was applied on both sides of a stainless steel plate having a thickness of 0.3 mm and 3 × 60 (cm) by about 40
A roller having a thickness of μm was applied. On both coated surfaces of the stainless steel sheet formed as described above, a granular activated carbon denitration catalyst carrying a catalyst component similar to that used in Example 1 was similarly attached and the non-adhered activated carbon catalyst was removed by removal. I removed it. Then, the epoxy resin was cured by heating at 100 ° C. for 1 hour to produce a plate-shaped catalyst for removing low-temperature nitrogen oxides having an adhesive layer of about 40 μm and an activated carbon catalyst layer of about 0.7 mm. The obtained plate-shaped catalyst for reducing and removing nitrogen oxides for low-temperature treatment was used to form a denitration reactor for combustion exhaust gas in the same manner as in Example 1, and the denitration performance for simulated exhaust gas was similarly measured. As a result, the denitration rate of 70% was maintained for 500 hours. Further, the pressure loss in the packed portion of the plate-like activated carbon denitration catalyst was 9 mmH 2 O, which was extremely small. Furthermore, after the treatment for 500 hours, the plate-like activated carbon denitration catalyst was taken out from the reactor and visually observed. As a result, there was almost no accumulation of dust and separation of the activated carbon catalyst particles.
【００１９】[0019]
【発明の効果】本発明の低温処理用窒素酸化物還元除去
触媒は、低温燃焼排ガス中のＮＯｘを還元除去に優れる
活性炭脱硝触媒の活性を損なうことなく維持して、板状
に形成されるため、圧力損失により安定した連続的脱硝
処理が困難であった従来の活性炭脱硝触媒の脱硝処理
を、燃焼排ガス中の煤塵の含有量によることなく長期的
に安定して高活性で高脱硝率で円滑に行うことができ
る。また、金属製平板基材上に、所定の粒径を有する粒
状活性炭脱硝触媒を、所定の有機高分子系接着剤硬化層
で接合固定して簡便に製造できる。EFFECTS OF THE INVENTION The nitrogen oxide reduction removal catalyst for low temperature treatment of the present invention is formed in a plate shape while maintaining the NOx in the low temperature combustion exhaust gas without impairing the activity of the activated carbon denitration catalyst excellent in reduction removal. The stable denitration of the conventional activated carbon denitration catalyst, which was difficult to achieve stable continuous denitration due to pressure loss, is stable for a long period of time with high activity and a high denitration rate regardless of the soot and dust content in the combustion exhaust gas. Can be done. Further, a granular activated carbon denitration catalyst having a predetermined particle diameter can be bonded and fixed to a metal flat plate base material with a predetermined organic polymer-based adhesive cured layer to easily produce the catalyst.
Claims (10)
剤硬化層を介して粒状活性炭窒素酸化物還元触媒を粒状
に接合保持してなる低温処理用窒素酸化物還元除去触
媒。1. A nitrogen oxide reduction removal catalyst for low temperature treatment, comprising a granular activated carbon nitrogen oxide reduction catalyst bonded and held in granular form on a metal flat plate substrate through an organic polymer adhesive cured layer.
ンレス鋼である特許請求の範囲第１項記載の低温処理用
窒素酸化物還元除去触媒。2. The nitrogen oxide reduction removal catalyst for low temperature treatment according to claim 1, wherein the metal flat plate base material is mild steel or stainless steel.
径が０．１〜５ｍｍの範囲である請求項１または２記載
の低温処理用窒素酸化物還元除去触媒。3. The nitrogen oxide reduction removal catalyst for low temperature treatment according to claim 1, wherein the particle size of the granular activated carbon nitrogen oxide reduction catalyst is in the range of 0.1 to 5 mm.
１〜１．０ｍｍである請求項１、２または３記載の低温
処理用窒素酸化物還元除去触媒。4. The polymer adhesive cured layer comprises about 0.0
The nitrogen oxide reduction removal catalyst for low temperature treatment according to claim 1, 2 or 3, which has a diameter of 1 to 1.0 mm.
樹脂系接着剤で形成されている請求項１〜４のいずれか
記載の低温処理用窒素酸化物還元除去触媒。5. The nitrogen oxide reduction-removing catalyst for low temperature treatment according to claim 1, wherein the polymer adhesive cured layer is formed of an epoxy resin adhesive.
型で常温硬化性接着剤である請求項５記載の低温処理用
窒素酸化物還元除去触媒。6. The nitrogen oxide reduction removal catalyst for low temperature treatment according to claim 5, wherein the epoxy resin adhesive is a two-liquid mixed type, room temperature curable adhesive.
０，０００ｐの粘性を有する有機高分子系接着剤を塗布
した後、該高分子接着剤塗布面に粒状活性炭窒素酸化物
還元触媒を付着させ１５０℃以下で該高分子接着剤を硬
化させることを特徴とする低温処理用窒素酸化物還元除
去触媒の製造方法。7. A metal flat plate substrate having a thickness of about 1,000-1.
After applying an organic polymer adhesive having a viscosity of 50,000 p, a granular activated carbon nitrogen oxide reduction catalyst is attached to the polymer adhesive application surface and the polymer adhesive is cured at 150 ° C. or lower. A method for producing a nitrogen oxide reduction-removing catalyst for low temperature treatment, which is characterized.
硬化性エポキシ樹脂系接着剤である請求項７記載の低温
処理用窒素酸化物還元除去触媒。8. The nitrogen oxide reduction removal catalyst for low temperature treatment according to claim 7, wherein the polymer adhesive is a two-liquid type room temperature curable epoxy resin adhesive.
触媒を前記高分子接着剤塗布面に散布して行う請求項７
または８記載の低温処理用窒素酸化物還元除去触媒の製
造方法。9. The adhesion is performed by spraying a granular activated carbon nitrogen oxide reduction catalyst on the polymer adhesive coated surface.
Or a method for producing a nitrogen oxide reduction-removing catalyst for low temperature treatment according to item 8.
元触媒を保持する容器内に、前記高分子接着剤を塗布し
た金属製平板基材を配置して行う請求項７または８記載
の低温処理用窒素酸化物還元除去触媒の製造方法。10. The low-temperature treatment according to claim 7, wherein the adhesion is performed by disposing a metal flat plate base material coated with the polymer adhesive in a container holding a granular activated carbon nitrogen oxide reduction catalyst. Method for producing nitrogen oxide reduction removal catalyst for automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7263525A JPH0975749A (en) | 1995-09-18 | 1995-09-18 | Nox reduction and removal catalyst for low-temperature treatment and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7263525A JPH0975749A (en) | 1995-09-18 | 1995-09-18 | Nox reduction and removal catalyst for low-temperature treatment and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0975749A true JPH0975749A (en) | 1997-03-25 |
Family
ID=17390752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7263525A Pending JPH0975749A (en) | 1995-09-18 | 1995-09-18 | Nox reduction and removal catalyst for low-temperature treatment and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0975749A (en) |
-
1995
- 1995-09-18 JP JP7263525A patent/JPH0975749A/en active Pending
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