JP2001129410A - Catalyst for purifying exhaust gas, its manufacturing and disposing methods and method for purifying exhaust gas using the same - Google Patents
Catalyst for purifying exhaust gas, its manufacturing and disposing methods and method for purifying exhaust gas using the sameInfo
- Publication number
- JP2001129410A JP2001129410A JP31108699A JP31108699A JP2001129410A JP 2001129410 A JP2001129410 A JP 2001129410A JP 31108699 A JP31108699 A JP 31108699A JP 31108699 A JP31108699 A JP 31108699A JP 2001129410 A JP2001129410 A JP 2001129410A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- exhaust gas
- gas purifying
- component
- purifying catalyst
- 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.)
- Granted
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 148
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004642 Polyimide Substances 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920001721 polyimide Polymers 0.000 claims abstract description 8
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims description 18
- 238000000746 purification Methods 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 6
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 238000004056 waste incineration Methods 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 229910000476 molybdenum oxide Inorganic materials 0.000 abstract description 2
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001930 tungsten oxide Inorganic materials 0.000 abstract description 2
- 229910001935 vanadium oxide Inorganic materials 0.000 abstract description 2
- 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 abstract 1
- 238000000151 deposition Methods 0.000 abstract 1
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 54
- 230000003197 catalytic effect Effects 0.000 description 11
- 239000002585 base Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000012784 inorganic fiber Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 150000002013 dioxins Chemical class 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229910052815 sulfur oxide Inorganic materials 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010612 desalination reaction 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
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Nonwoven Fabrics (AREA)
- Chimneys And Flues (AREA)
- Processing Of Solid Wastes (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、排ガス浄化用触
媒、その製造方法および処分方法ならびに前記排ガス浄
化用触媒を用いた排ガス浄化方法に係り、特に、触媒活
性が低下した際に容易に減容して処分することができる
排ガス浄化用触媒、その製造方法および処分方法ならび
に前記排ガス浄化用触媒を用いた排ガス浄化方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying catalyst, a method for producing and disposing the same, and an exhaust gas purifying method using the exhaust gas purifying catalyst. The present invention relates to an exhaust gas purifying catalyst that can be disposed and disposed, a method for producing the same, a disposal method, and an exhaust gas purifying method using the exhaust gas purifying catalyst.
【０００２】[0002]
【従来の技術】発電所、各種工場、自動車などから排出
される排煙中の窒素酸化物（ＮＯｘ）は光化学スモッグ
や酸性雨の原因物質であり、その効果的な除去方法とし
て、例えばアンモニア（ＮＨ3 ）等を還元剤とした選択
的接触還元による排煙脱硝法が知られており、火力発電
所を中心に幅広く用いられている。2. Description of the Related Art Nitrogen oxides (NOx) in flue gas emitted from power plants, various factories, automobiles, etc. are substances that cause photochemical smog and acid rain. A flue gas denitration method by selective catalytic reduction using NH 3 ) or the like as a reducing agent is known, and is widely used mainly in thermal power plants.
【０００３】脱硝触媒には、バナジウム（Ｖ）、モリブ
デン（Ｍｏ）またはタングステン（Ｗ）を活性成分とし
た酸化チタン（ＴｉＯ2 ）系触媒が使用されており、特
に、活性成分の一つとしてバナジウムを含むものは脱硝
活性が高いだけでなく、排ガス中に含まれる不純物によ
る劣化が小さいこと、より低温から使用できることなど
から脱硝触媒の主流になっている。このような従来技術
に関するものとしては、例えば特開昭５０−１２８６８
号公報等が挙げられる。As a denitration catalyst, a titanium oxide (TiO 2 ) catalyst containing vanadium (V), molybdenum (Mo) or tungsten (W) as an active component is used. In particular, vanadium is one of the active components. In addition to those having a high denitration activity, those containing are the mainstream of denitration catalysts because they are less deteriorated by impurities contained in exhaust gas and can be used at lower temperatures. Japanese Patent Application Laid-Open No. 50-12868 discloses such a prior art.
And the like.
【０００４】ところで近年、都市ごみ焼却処理施設など
から非意図的に排出される有毒のダイオキシン類（ＤＸ
Ｎ）が社会問題となっている。このＤＸＮについても、
残渣を生じることのない触媒接触法による処理が有望視
されており、脱硝用触媒またはその改良触媒が有効であ
ることが確認されている。このような従来技術に関する
ものとしては、例えば特開平３−８４１５号公報等が挙
げられる。In recent years, toxic dioxins (DX) discharged unintentionally from municipal solid waste incineration facilities and the like have recently been developed.
N) is a social problem. About this DXN,
Promising treatment by a catalyst contact method that does not generate residues is promising, and it has been confirmed that a denitration catalyst or its improved catalyst is effective. Japanese Patent Application Laid-Open No. 3-8415 discloses an example of such prior art.
【０００５】排ガス浄化用触媒は、一般にハニカム状、
板状に成形されており、ハニカム触媒は、例えば無機繊
維を含んだ触媒成分で構成されている。また板状触媒
は、適用先にもよるが、通常１ｍｍ程度の厚みを有して
おり、各種製造法が提案されているが、例えば金属薄板
をメタルラス加工したのち、これにアルミニウム溶射を
施した網状物またはセラミックス繊維製織布もしくは不
織布を基板とし、これに触媒成分を塗布、圧着して得た
板状触媒を、例えば図２に示したように所定間隔の突起
部を有するエレメント状に加工し、例えば図３に示した
ように積層し、組み込んだ触媒構造体（触媒ブロック）
は、通風損失が小さく、ばい塵で閉塞されにくいなどの
優れた特徴がある。このような従来技術に関するものと
して、例えば特開昭５４−７９１８８号公報等が挙げら
れる。なお、最近ではバグフィルタの濾布に触媒機能を
付与した、いわゆる触媒バグフィルタが提案されている
が、これは排ガスの脱塩、脱硫および除塵処理を同時に
行うためのものであり、装置性能上濾布面積が限定され
るために十分なＤＡＮ除去を行うことは困難である。[0005] Exhaust gas purifying catalysts generally have a honeycomb shape,
The honeycomb catalyst is formed in a plate shape, and is formed of a catalyst component containing, for example, inorganic fibers. Further, the plate-shaped catalyst has a thickness of about 1 mm, depending on the application destination, and various production methods have been proposed. For example, after a metal thin plate is subjected to metal lath processing, this is subjected to aluminum spraying. A plate-shaped catalyst obtained by applying a catalyst component to a mesh or a woven or non-woven fabric made of ceramic fiber and applying a catalyst component to the substrate is processed into an element shape having projections at predetermined intervals as shown in FIG. 2, for example. Then, for example, a catalyst structure (catalyst block) laminated and incorporated as shown in FIG.
Has excellent characteristics such as low ventilation loss and difficulty in being blocked by dust. Japanese Patent Application Laid-Open No. 54-79188, for example, relates to such prior art. Recently, a so-called catalytic bag filter in which a catalytic function is added to the filter cloth of the bag filter has been proposed, but this is for simultaneously performing desalination, desulfurization and dust removal of exhaust gas. Since the filter cloth area is limited, it is difficult to perform sufficient Dan removal.
【０００６】また排ガス浄化用触媒は、排ガスに含まれ
る硫黄酸化物（ＳＯｘ）やダスト中に存在するアルカリ
金属などによって被毒されるために、経時的な性能低下
を生じる。そして所期の触媒性能を満足しなくなった時
点で、もしくはその時期を予測した一定期間経過後に新
たな触媒を加える積増法または一部もしくは全部を交換
する交換法が採用されており、交換された使用済み触媒
は産業廃棄物として処理されているのが現状である。な
お、触媒の再生利用法として、一旦被毒した触媒を水洗
または酸洗等によって賦活する方法も提案されている
が、所期の活性を回復するまでには至っていない。この
ような触媒賦活方法に関する従来技術としては、例えば
特開昭５４−１１０９４号公報等が挙げられる。Further, the exhaust gas purifying catalyst is poisoned by sulfur oxides (SOx) contained in the exhaust gas and alkali metals present in the dust, so that the performance thereof deteriorates with time. And when the expected catalyst performance is no longer satisfied, or after a certain period of time when the time is predicted, the accumulation method of adding a new catalyst or the exchange method of replacing part or all is adopted. At present, used catalysts are treated as industrial waste. As a method for reusing the catalyst, a method of activating the once-poisoned catalyst by washing with water or pickling has been proposed, but the desired activity has not yet been recovered. As a prior art relating to such a catalyst activation method, for example, JP-A-54-11094 is cited.
【０００７】ところで、使用済み排ガス浄化用触媒に
は、ＤＸＮ類をはじめとする有害物質が付着しており、
これを安全かつ有効に処分するための方法の開発が望ま
れている。すなわち、排ガス浄化用触媒を用いた排ガス
浄化方法において、排ガス中のＤＸＮ類等は触媒の分解
作用によってほぼ完全に分解されると思われるが、前記
排ガスに含まれるダストには未分解のまま付着または吸
着している場合がある。従って、ダストが付着した使用
済み触媒にも当然ＤＸＮ類等が付着していると考えられ
るので、その処分方法には細心の注意を払う必要があ
る。By the way, harmful substances such as DXN adhere to the used exhaust gas purifying catalyst.
It is desired to develop a method for safely and effectively disposing of this. That is, in the exhaust gas purification method using the exhaust gas purification catalyst, DXNs and the like in the exhaust gas are considered to be almost completely decomposed by the decomposition action of the catalyst, but adhere to the dust contained in the exhaust gas without being decomposed. Or it may be adsorbed. Therefore, since it is considered that DXNs and the like are naturally attached to the used catalyst to which dust is attached, it is necessary to pay close attention to the disposal method.
【０００８】ＤＸＮ等の有害成分を含む使用済み触媒の
処分方法としては、前記有害成分を同時に分解除去する
ことができる焼却方法が最も有効と考えられるが、従来
の排ガス浄化用触媒は、金属基板または無機繊維製基板
に触媒成分を塗布したものであり、その大部分が無機成
分で構成されていることから、焼却処分することはでき
なかった。一方、可燃性基材に触媒成分を担持した、焼
却処分可能な触媒として、触媒基材として活性炭を用い
たものがあるが、このような活性炭触媒は適用可能温度
が低く、十分な触媒活性が得られないばかりか、重金属
が付着し易く、劣化速度が大きいという問題があった。The most effective disposal method of a spent catalyst containing harmful components such as DXN is considered to be an incineration method capable of decomposing and removing the harmful components at the same time. Alternatively, a catalyst component was applied to an inorganic fiber substrate, and most of the substrate was composed of an inorganic component, so that it could not be incinerated. On the other hand, there is a catalyst in which activated carbon is used as a catalyst substrate as a catalyst that can carry out incineration, in which a catalyst component is supported on a combustible substrate. Such an activated carbon catalyst has a low applicable temperature and sufficient catalytic activity. Not only is it impossible to obtain, but also there is a problem that the heavy metal easily adheres and the deterioration rate is high.
【０００９】[0009]
【発明が解決しようとする課題】本発明の課題は、上記
従来技術に鑑み、実用的、かつ十分な触媒活性を有し、
しかも使用済みとなった時点で容易に焼却処分すること
ができる、排ガス浄化用触媒、その製造方法および処分
方法ならびに前記排ガス浄化触媒を用いた排ガス浄化方
法を提供することにある。DISCLOSURE OF THE INVENTION An object of the present invention is to provide a practical and sufficient catalytic activity in view of the above prior art,
Moreover, an object of the present invention is to provide an exhaust gas purifying catalyst, a method for producing and disposing the same, and an exhaust gas purifying method using the exhaust gas purifying catalyst, which can be easily incinerated when used.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決するた
め、本願で特許請求する発明は以下のとおりである。 （１）長方形または正方形の平板状の触媒基材に触媒成
分を担持させた排ガス浄化用触媒において、前記触媒基
材として可燃性のフェルトを用いたことを特徴とする排
ガス浄化用触媒。 （２）前記フェルトが、ポリイミド系の可燃性フェルト
であることを特徴とする上記（１）に記載の排ガス浄化
用触媒。 （３）前記触媒成分が、チタニア、シリカ、アルミナお
よびシリカ−アルミナから選ばれた少なくとも一種から
なる第一成分と、バナジウム、タングステンおよびモリ
ブデンの酸化物から選ばれた少なくとも一種からなる第
二成分を含むものであることを特徴とする上記（１）ま
たは（２）に記載の排ガス浄化用触媒。 （４）上記（１）〜（３）の何れかに記載の平板状の排
ガス浄化用触媒であって、前記平板の一対の辺に対して
平行な突起部を所定間隔で多数形成したことを特徴とす
る排ガス浄化用触媒。Means for Solving the Problems To solve the above problems, the invention claimed in the present application is as follows. (1) An exhaust gas purifying catalyst in which a catalytic component is carried on a rectangular or square plate-shaped catalyst substrate, wherein a combustible felt is used as the catalyst substrate. (2) The exhaust gas purifying catalyst according to (1), wherein the felt is a polyimide-based flammable felt. (3) The catalyst component comprises a first component composed of at least one selected from titania, silica, alumina and silica-alumina, and a second component composed of at least one selected from oxides of vanadium, tungsten and molybdenum. The exhaust gas purifying catalyst according to the above (1) or (2), which comprises: (4) The flat exhaust gas purifying catalyst according to any one of the above (1) to (3), wherein a large number of projections parallel to a pair of sides of the flat plate are formed at predetermined intervals. Characteristic catalyst for exhaust gas purification.
【００１１】（５）長方形または正方形の平板状の触媒
基材に触媒成分を担持させる排ガス浄化用触媒の製造方
法において、前記触媒基材として平板状の可燃性のフェ
ルトを用い、該可燃性フェルトに上記（３）に記載の触
媒成分を含むスラリを含浸させることを特徴とする排ガ
ス浄化用触媒の製造方法。 （６）前記（３）に記載の触媒成分を含むペーストを前
記平板状の可燃性フェルトに塗布することを特徴とする
上記（５）に記載の排ガス浄化用触媒の製造方法。(5) In the method for producing an exhaust gas purifying catalyst in which a catalyst component is supported on a rectangular or square flat catalyst base, a flat combustible felt is used as the catalyst base. A method for producing an exhaust gas purifying catalyst, comprising impregnating a slurry containing the catalyst component described in (3) above. (6) The method for producing an exhaust gas purifying catalyst according to (5), wherein the paste containing the catalyst component according to (3) is applied to the flat combustible felt.
【００１２】（７）排ガス浄化用触媒を用いたごみ焼却
処理施設から排出される排ガスの浄化方法であって、前
記排ガスを１４０〜２００℃で除塵したのち１７０〜１
９０℃で上記（１）〜（４）の何れかに記載の排ガス浄
化用触媒と接触させることを特徴とする排ガス浄化方
法。(7) A method of purifying exhaust gas discharged from a refuse incineration plant using an exhaust gas purifying catalyst, wherein the exhaust gas is removed at 140 to 200 ° C., and then 170 to 1
An exhaust gas purifying method, comprising contacting the exhaust gas purifying catalyst according to any one of the above (1) to (4) at 90 ° C.
【００１３】（８）上記（１）〜（４）の何れかに記載
の排ガス浄化用触媒の処分方法であって、使用済み排ガ
ス浄化用触媒を、該排ガス浄化用触媒を用いて浄化した
排ガスの発生源であるごみ焼却処理施設の焼却炉または
溶融炉に投入し、１０００〜１３００℃で焼却または溶
融することを特徴とする排ガス浄化用触媒の処分方法。(8) The method for disposing of an exhaust gas purifying catalyst according to any one of the above (1) to (4), wherein the used exhaust gas purifying catalyst is purified using the exhaust gas purifying catalyst. A method for disposing of a catalyst for purifying exhaust gas, wherein the catalyst is thrown into an incinerator or a melting furnace of a refuse incineration facility, which is a source of generation, and incinerated or melted at 1000 to 1300 ° C.
【００１４】本発明の排ガス浄化用触媒は、触媒基材と
してポリイミド系フェルトのような可燃性のフェルトを
用いる。触媒成分としては、チタニア、シリカ、アルミ
ナおよびシリカ−アルミナから選ばれた少なくとも一種
からなる第一成分と、バナジウム、タングステンおよび
モリブデンの酸化物から選ばれた少なくとも一種からな
る第二成分を含むものが使用され、この触媒成分はスラ
リ状で基材に含浸させるか、またはペースト状で基材表
面に塗布される。触媒の性能は、表面積や細孔容積等、
触媒の物性によって大きく左右されるが、可燃製フェル
トを基材として用いた本発明の排ガス浄化用触媒は、従
来の無機繊維性織布または不織布を用いた触媒に較べて
何ら遜色のない物性を有しており、十分な触媒活性を発
現することができる。The exhaust gas purifying catalyst of the present invention uses a combustible felt such as a polyimide felt as a catalyst base material. As the catalyst component, titania, silica, the first component consisting of at least one selected from alumina and silica-alumina, and those containing the second component consisting of at least one selected from vanadium, tungsten and molybdenum oxides The catalyst component is used, and the catalyst component is impregnated into the slurry in the form of a substrate, or is applied in the form of a paste to the surface of the substrate. The performance of the catalyst, such as surface area and pore volume,
Although greatly affected by the physical properties of the catalyst, the exhaust gas purifying catalyst of the present invention using a combustible felt as a base material has physical properties comparable to those of a conventional catalyst using an inorganic fibrous woven or nonwoven fabric. And exhibit sufficient catalytic activity.
【００１５】本発明の排ガス浄化用触媒は、通常多数積
層した触媒ユニットとして使用されるので、積層し易く
するために、プレス成形法等によって例えば図２に示し
たように、平板状の長方形または正方形の一対の辺に対
して平行な突起部（山部）または段差部が所定間隔で複
数設けられる。The exhaust gas purifying catalyst of the present invention is usually used as a catalyst unit having a large number of stacked layers. To facilitate stacking, for example, as shown in FIG. A plurality of protrusions (peaks) or steps parallel to a pair of square sides are provided at predetermined intervals.
【００１６】本発明の排ガス浄化用触媒の使用温度は、
１７０〜１９０℃である。１７０℃未満では触媒活性が
十分発現されず、１９０℃を超えると触媒基材である可
燃性フェルトの熱安定性が低下するからである。排ガス
浄化用触媒と接触させる排ガスはあらかじめ除塵されて
いることが好ましく、除塵温度は、例えば１４０〜２０
０℃、より具体的には１５０〜１８０℃である。The operating temperature of the exhaust gas purifying catalyst of the present invention is as follows:
170-190 ° C. If the temperature is lower than 170 ° C., the catalytic activity is not sufficiently exhibited, and if the temperature exceeds 190 ° C., the thermal stability of the combustible felt as the catalyst base material is reduced. It is preferable that the exhaust gas to be brought into contact with the exhaust gas purifying catalyst is previously dust-removed.
0 ° C, more specifically 150 to 180 ° C.
【００１７】本発明において、使用済みの排ガス浄化用
触媒は、例えば１０〜３０ｃｍ角に裁断または粉砕され
たのち、排ガス発生源である焼却炉または溶融炉に導入
して酸素富化条件または還元雰囲気で、例えば１０００
〜１３００℃で焼却処理され、触媒基材である可燃性フ
ェルトが焼失し、無機成分は焼却灰または溶融物として
回収されて酸化物の状態で廃棄されるか、または有価成
分として分離、回収して再利用される。In the present invention, the used exhaust gas purifying catalyst is cut or crushed into, for example, 10 to 30 cm square, and then introduced into an incinerator or a melting furnace, which is an exhaust gas generating source, to be subjected to oxygen enrichment conditions or a reducing atmosphere. So, for example, 1000
It is incinerated at １1300 ° C., the combustible felt as a catalyst substrate is burned off, and the inorganic components are recovered as incinerated ash or molten material and discarded in the form of oxides, or separated and recovered as valuable components. And reused.
【００１８】[0018]
【発明の実施の形態】次に、本発明を実施例により、さ
らに詳細に説明する。 実施例１ メタチタン酸スラリ（ＴｉＯ2 含有量：３０ｗｔ％、Ｓ
Ｏ4 含有量：８ｗｔ％）６７ｋｇに、パラモリブデン酸
アンモニウム（（ＮＨ4 ）6 Ｍｏ7 Ｏ24・４Ｈ 2 Ｏ）を
２．４ｋｇ、メタバナジン酸アンモニウム（ＮＨ4 ＶＯ
3 ）を１．２８ｋｇ加え、加熱ニーダを用いて水を蒸発
させながら混練して水分約３６％のペーストを得た。こ
のペーストを３φの柱状に押出し造粒し、流動乾燥機で
乾燥し、大気中２５０℃で２時間焼成し、得られた顆粒
をハンマーミルで平均粒径５μｍの粒状に粉砕して第一
成分とした。第一成分における組成比は、原子比でＶ／
Ｍｏ／Ｔｉ＝４／５／９１であった。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described by way of examples.
This will be described in more detail. Example 1 Metatitanate slurry (TiOTwoContent: 30 wt%, S
OFourContent: 8 wt%) 67 kg, paramolybdic acid
Ammonium ((NHFour)6Mo7Otwenty four・ 4H TwoO)
2.4 kg, ammonium metavanadate (NHFourVO
Three) Is added and water is evaporated using a heating kneader
The mixture was kneaded while stirring to obtain a paste having a water content of about 36%. This
Extruded into a 3φ column and granulated with a fluidized drier
The granules obtained are dried and calcined at 250 ° C. for 2 hours in the atmosphere.
Pulverized with a hammer mill into granules having an average particle size of 5 μm.
The ingredients. The composition ratio in the first component is V /
Mo / Ti = 4/5/91.
【００１９】この第一成分の粉末２０ｋｇと水１０ｋｇ
をニーダを用いて１時間混練して粘土状のペーストとし
た。この触媒ペーストをローラを用いてポリイミドフェ
ルトの表面に塗布し、厚さ約０．９ｍｍ、縦×横＝５０
０×５００ｍｍの板状体とし、この板状体を加熱プレス
成形により図２に示したような平行な突起部を形成し、
風乾後、大気中５００℃で２時間焼成して板状触媒と
し、この板状触媒を所定枚数積層して図３に示したよう
な触媒ユニットとした。20 kg of powder of the first component and 10 kg of water
Was kneaded for 1 hour using a kneader to obtain a clay-like paste. This catalyst paste was applied to the surface of a polyimide felt using a roller, and the thickness was about 0.9 mm, length x width = 50
A plate-like body having a size of 0 × 500 mm was formed by heating press molding to form parallel projections as shown in FIG.
After air drying, it was calcined at 500 ° C. for 2 hours in the atmosphere to obtain a plate-like catalyst, and a predetermined number of such plate-like catalysts were laminated to obtain a catalyst unit as shown in FIG.
【００２０】得られた触媒ユニットを触媒反応器に充填
し、ＬＰＧ燃焼炉で塩化ビニルを燃焼した際に発生した
排ガスを、表１に示した条件で処理してＤＸＮ類の除去
性能を求めたところ、ＤＸＮ除去率は８７％であった。
次に、排ガス浄化テスト後の使用済み触媒を１０〜３０
ｃｍ角に粉砕または裁断し、加熱炉に導入して酸素富化
条件下１０００〜１３００℃で加熱、焼却したところ、
触媒基材であるポリイミドフェルトは焼失し、触媒成分
は固体状の酸化物として回収された。回収固形物（無機
成分）の触媒に対する重量比は２０％であった。The obtained catalyst unit was filled in a catalytic reactor, and the exhaust gas generated when vinyl chloride was burned in an LPG combustion furnace was treated under the conditions shown in Table 1 to determine the performance of removing DXNs. However, the DXN removal rate was 87%.
Next, the used catalyst after the exhaust gas purification test is
When crushed or cut into cm squares, introduced into a heating furnace, and heated and incinerated at 1000 to 1300 ° C. under oxygen-enriched conditions,
The polyimide felt as the catalyst base was burned off, and the catalyst component was recovered as a solid oxide. The weight ratio of the recovered solid (inorganic component) to the catalyst was 20%.
【００２１】[0021]
【表１】 実施例２ 実施例１で調整した触媒ペーストにさらに水１０ｋｇを
加えてスラリ状とし、該触媒スラリをポリイミドフェル
トのシートに含浸させた以外は、上記実施例１と同様に
して同様の触媒ユニットを得、同様の排ガス浄化テスト
および焼却テストを行ったところ、ＤＸＮ除去率は８９
％、回収固形物（無機成分）の触媒に対する重量比は３
８％であった。[Table 1] Example 2 A similar catalyst unit was prepared in the same manner as in Example 1 above, except that 10 kg of water was further added to the catalyst paste prepared in Example 1 to form a slurry, and the catalyst slurry was impregnated into a sheet of polyimide felt. When the same exhaust gas purification test and incineration test were performed, the DXN removal rate was 89%.
%, The weight ratio of the recovered solid (inorganic component) to the catalyst is 3
8%.
【００２２】比較例１ 触媒基材として厚さ０．２ｍｍ、縦×横＝５００×５０
０ｍｍのＳＵＳ４３０製のメタルラス基材を用いた以外
は上記実施例１と同様にして、同様の触媒ユニットを
得、実施例１と同様の排ガス浄化テストおよび焼却テス
トを行ったところ、ＤＸＮ除去率は８９％、回収固形物
（無機成分）の触媒に対する重量比は９６％であった。Comparative Example 1 A catalyst substrate having a thickness of 0.2 mm and a length × width = 500 × 50
A similar catalyst unit was obtained in the same manner as in Example 1 except that a metal lath substrate made of SUS430 having a diameter of 0 mm was used, and the same exhaust gas purification test and incineration test as in Example 1 were performed. The weight ratio of the recovered solid (inorganic component) to the catalyst was 96%.
【００２３】実施例１、２および比較例１の排ガス浄化
テストの結果を表２に、焼却テストの結果を図１にそれ
ぞれ示す。Table 2 shows the results of the exhaust gas purification tests of Examples 1 and 2 and Comparative Example 1, and FIG. 1 shows the results of the incineration test.
【００２４】[0024]
【表２】 表２において、触媒基材としてポリイミドフェルトを用
いた実施例１および２は、メタルラス基材を用いた比較
例１に較べて遜色のないＤＸＮ除去率が得られたことが
分かる。図１において、実施例１および２の残留固形物
の割合は、比較例１に較べて２０〜４０％に低減してお
り、本発明の触媒は、焼却処分に適していることが分か
る。[Table 2] In Table 2, it can be seen that Examples 1 and 2 using polyimide felt as the catalyst substrate obtained a DXN removal rate comparable to that of Comparative Example 1 using a metal lath substrate. In FIG. 1, the ratio of the residual solids in Examples 1 and 2 is reduced to 20 to 40% as compared with Comparative Example 1, and it can be seen that the catalyst of the present invention is suitable for incineration.
【００２５】[0025]
【発明の効果】本願の請求項１に記載の発明によれば、
触媒全体に占める不燃性の無機成分比率が従来の半分以
下となり、使用済み後、容易に焼却処分することができ
る。本願の請求項２に記載の発明によれば、上記発明と
同様、使用済みの触媒を焼却処分することができる。According to the invention described in claim 1 of the present application,
The ratio of nonflammable inorganic components in the entire catalyst is less than half of the conventional one, and it can be easily incinerated after use. According to the invention described in claim 2 of the present application, the used catalyst can be incinerated as in the above invention.
【００２６】本願の請求項３に記載の発明によれば、従
来の金属または無機繊維製基材を用いた排ガス浄化用触
媒と遜色のない高い触媒活性が得られる。本願の請求項
４に記載の発明によれば、焼却処分可能な触媒ブロック
が得られる。According to the third aspect of the present invention, a high catalytic activity comparable to that of a conventional catalyst for purifying exhaust gas using a metal or inorganic fiber base material can be obtained. According to the invention described in claim 4 of the present application, a catalyst block that can be incinerated is obtained.
【００２７】本願の請求項５に記載の発明によれば、焼
却処分可能で、しかも従来の触媒と遜色のない触媒活性
を発現する排ガス浄化用触媒を製造することができる。
本願の請求項６に記載の発明によれば、上記発明と同
様、焼却処分可能で、しかも従来の触媒と遜色のない触
媒活性を発現する排ガス浄化用触媒を製造することがで
きる。According to the invention of claim 5 of the present application, it is possible to produce an exhaust gas purifying catalyst which can be incinerated and which exhibits catalytic activity comparable to that of a conventional catalyst.
According to the invention described in claim 6 of the present application, similarly to the above invention, it is possible to produce an exhaust gas purifying catalyst that can be incinerated and exhibits catalytic activity comparable to that of a conventional catalyst.
【００２８】本願の請求項７に記載の発明によれば、使
用後に焼却処分可能な排ガス浄化触媒を用いて排ガス中
の有害物質を効果的に除去することができる。本願の請
求項８に記載の発明によれば、使用済み触媒を産業廃棄
物として最終処分地まで輸送する必要がなく、同一施設
内で焼却処分することができる。また使用済み触媒に付
着した有害物質は焼却時に分解するので二次公害のおそ
れもない。According to the seventh aspect of the present invention, harmful substances in exhaust gas can be effectively removed by using an exhaust gas purifying catalyst which can be incinerated after use. According to the invention described in claim 8 of the present application, there is no need to transport the used catalyst as industrial waste to the final disposal site, and the spent catalyst can be incinerated in the same facility. In addition, harmful substances attached to the used catalyst are decomposed during incineration, so there is no risk of secondary pollution.
【図１】本発明の効果を示す説明図。FIG. 1 is an explanatory diagram showing an effect of the present invention.
【図２】板状触媒の一例を示す図。FIG. 2 is a view showing an example of a plate catalyst.
【図３】触媒積層体（触媒ブロック）の一例を示す図。FIG. 3 is a view showing an example of a catalyst laminate (catalyst block).
１…板状触媒、２…突起部、３…平板部、４…触媒ブロ
ック。DESCRIPTION OF SYMBOLS 1 ... Plate catalyst, 2 ... Projection part, 3 ... Flat plate part, 4 ... Catalyst block.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０９Ｂ 3/00 Ｂ０１Ｄ 53/36 ＺＡＢＣ Ｄ０４Ｈ 1/42 Ｂ０９Ｂ 3/00 ３０３Ｂ Ｆ２３Ｊ 15/00 Ｆ２３Ｊ 15/00 Ｈ (72)発明者 山田 晃広 広島県呉市宝町６番９号 バブコック日立 株式会社呉工場内 Ｆターム(参考） 3K070 DA02 DA25 DA32 4D004 AA47 AB03 AB07 AC04 CA04 CA28 CA29 CA41 DA02 DA03 DA06 4D048 AA21 BA03X BA03Y BA06X BA06Y BA07X BA07Y BA23X BA23Y BA26X BA26Y BA27X BA27Y BA41X BA41Y BA42X BA42Y BB08 4G069 AA03 BA01A BA01B BA02A BA02B BA04A BA04B BA22A BA22B BC54A BC54B BC59A BC59B BC60A BC60B BD02A BD02B CA03 EA03X EA03Y EA10 4L047 AA26 AB02 BA03 CB05 CC12 CC16 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B09B 3/00 B01D 53/36 ZABC D04H 1/42 B09B 3/00 303B F23J 15/00 F23J 15/00 H (72) Inventor Akihiro Yamada 6-9 Takara-cho, Kure-shi, Hiroshima F-term in Babcock-Hitachi Kure factory (reference) 3K070 DA02 DA25 DA32 4D004 AA47 AB03 AB07 AC04 CA04 CA28 CA29 CA41 DA02 DA03 DA06 4D048 AA21 BA03X BA03Y BA06X BA06Y BA07X BA07Y BA23X BA23Y BA26X BA26Y BA27X BA27Y BA41X BA41Y BA42X BA42Y BB08 4G069 AA03 BA01A BA01B BA02A BA02B BA04A BA04B BA22A BA22B BC54A BC54B BC59A BC59B BC60A BC60B BC02 ABA03A03 BA03 A0302
Claims (8)
に触媒成分を担持させた排ガス浄化用触媒において、前
記触媒基材として可燃性のフェルトを用いたことを特徴
とする排ガス浄化用触媒。1. An exhaust gas purifying catalyst comprising a catalyst component supported on a rectangular or square plate-like catalyst substrate, wherein a combustible felt is used as the catalyst substrate.
フェルトであることを特徴とする請求項１に記載の排ガ
ス浄化用触媒。2. The exhaust gas purifying catalyst according to claim 1, wherein the felt is a polyimide-based flammable felt.
ルミナおよびシリカ−アルミナから選ばれた少なくとも
一種からなる第一成分と、バナジウム、タングステンお
よびモリブデンの酸化物から選ばれた少なくとも一種か
らなる第二成分を含むものであることを特徴とする請求
項１または２に記載の排ガス浄化用触媒。3. The catalyst component according to claim 1, wherein the catalyst component is at least one selected from titania, silica, alumina and silica-alumina, and the second component is at least one selected from oxides of vanadium, tungsten and molybdenum. The exhaust gas purifying catalyst according to claim 1, comprising a component.
排ガス浄化用触媒であって、前記平板の一対の辺に対し
て平行な突起部を所定間隔で多数形成したことを特徴と
する排ガス浄化用触媒。4. A flat exhaust gas purifying catalyst according to claim 1, wherein a plurality of projections parallel to a pair of sides of the flat plate are formed at predetermined intervals. Exhaust gas purification catalyst.
に触媒成分を担持させる排ガス浄化用触媒の製造方法に
おいて、前記触媒基材として平板状の可燃性のフェルト
を用い、該可燃性フェルトに請求項３に記載の触媒成分
を含むスラリを含浸させることを特徴とする排ガス浄化
用触媒の製造方法。5. A method for producing an exhaust gas purifying catalyst in which a catalyst component is supported on a rectangular or square plate-like catalyst substrate, wherein a plate-like combustible felt is used as the catalyst substrate. A method for producing an exhaust gas purifying catalyst, comprising impregnating a slurry containing the catalyst component according to claim 3.
ーストを前記平板状の可燃性フェルトに塗布することを
特徴とする請求項５に記載の排ガス浄化用触媒の製造方
法。6. The method for producing an exhaust gas purifying catalyst according to claim 5, wherein the paste containing the catalyst component according to claim 3 is applied to the flat combustible felt.
施設から排出される排ガスの浄化方法であって、前記排
ガスを１４０〜２００℃で除塵したのち１７０〜１９０
℃で請求項１〜４の何れかに記載の排ガス浄化用触媒と
接触させることを特徴とする排ガス浄化方法。7. A method for purifying exhaust gas discharged from a refuse incineration plant using an exhaust gas purifying catalyst, comprising removing the exhaust gas at 140 to 200 ° C. and then 170 to 190.
An exhaust gas purification method comprising contacting the exhaust gas purification catalyst according to any one of claims 1 to 4 at a temperature of ° C.
化用触媒の処分方法であって、使用済み排ガス浄化用触
媒を、該排ガス浄化用触媒を用いて浄化した排ガスの発
生源であるごみ焼却処理施設の焼却炉または溶融炉に投
入し、１０００〜１３００℃で焼却または溶融すること
を特徴とする排ガス浄化用触媒の処分方法。8. The method for disposing of an exhaust gas purifying catalyst according to any one of claims 1 to 4, wherein the used exhaust gas purifying catalyst is a source of exhaust gas purified by using the exhaust gas purifying catalyst. A method for disposing of an exhaust gas purifying catalyst, wherein the catalyst is put into an incinerator or a melting furnace of a waste incineration facility and incinerated or melted at 1000 to 1300 ° C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31108699A JP3762166B2 (en) | 1999-11-01 | 1999-11-01 | Exhaust gas purification catalyst, production method and disposal method thereof, and exhaust gas purification method using the exhaust gas purification catalyst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31108699A JP3762166B2 (en) | 1999-11-01 | 1999-11-01 | Exhaust gas purification catalyst, production method and disposal method thereof, and exhaust gas purification method using the exhaust gas purification catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001129410A true JP2001129410A (en) | 2001-05-15 |
| JP3762166B2 JP3762166B2 (en) | 2006-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31108699A Expired - Fee Related JP3762166B2 (en) | 1999-11-01 | 1999-11-01 | Exhaust gas purification catalyst, production method and disposal method thereof, and exhaust gas purification method using the exhaust gas purification catalyst |
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| Country | Link |
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| JP (1) | JP3762166B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015222163A (en) * | 2014-05-23 | 2015-12-10 | 三菱日立パワーシステムズ株式会社 | Denitration equipment and catalytic exchange method |
| CN108458351A (en) * | 2018-03-30 | 2018-08-28 | 成都易态科技有限公司 | Solid waste incineration flue gas processing method and its system |
-
1999
- 1999-11-01 JP JP31108699A patent/JP3762166B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015222163A (en) * | 2014-05-23 | 2015-12-10 | 三菱日立パワーシステムズ株式会社 | Denitration equipment and catalytic exchange method |
| CN108458351A (en) * | 2018-03-30 | 2018-08-28 | 成都易态科技有限公司 | Solid waste incineration flue gas processing method and its system |
| CN108458351B (en) * | 2018-03-30 | 2024-01-05 | 成都易态科技有限公司 | Solid waste incineration flue gas purification treatment method and system thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3762166B2 (en) | 2006-04-05 |
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