JPS5867343A - Catalytic body for purification of gas - Google Patents
Catalytic body for purification of gasInfo
- Publication number
- JPS5867343A JPS5867343A JP56166201A JP16620181A JPS5867343A JP S5867343 A JPS5867343 A JP S5867343A JP 56166201 A JP56166201 A JP 56166201A JP 16620181 A JP16620181 A JP 16620181A JP S5867343 A JPS5867343 A JP S5867343A
- Authority
- JP
- Japan
- Prior art keywords
- gases
- catalyst
- element selected
- oxygen
- catalytic body
- 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
- 238000000746 purification Methods 0.000 title claims abstract description 9
- 230000003197 catalytic effect Effects 0.000 title abstract description 5
- 239000007789 gas Substances 0.000 claims abstract description 41
- 239000003054 catalyst Substances 0.000 claims abstract description 32
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002131 composite material Substances 0.000 claims abstract description 7
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 4
- 150000001342 alkaline earth metals Chemical class 0.000 claims abstract description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 230000001590 oxidative effect Effects 0.000 abstract description 10
- -1 B is Co Inorganic materials 0.000 abstract description 4
- 230000001747 exhibiting effect Effects 0.000 abstract description 2
- 229910052748 manganese Inorganic materials 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 229910052723 transition metal Inorganic materials 0.000 abstract 1
- 150000003624 transition metals Chemical class 0.000 abstract 1
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
- 239000008188 pellet Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 150000003891 oxalate salts Chemical class 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011533 mixed conductor Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、ガス浄化用触媒体に関するもので、酸化性ガ
スと還元性ガスを同時に効率よく処理、低減する触媒を
提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a catalyst for gas purification, and provides a catalyst that simultaneously and efficiently processes and reduces oxidizing gas and reducing gas.
工場、自動車、家庭用燃焼器具などから排出される気体
には、CO等の還元性ガスやNOx等の酸化性ガスが含
まれ、人体への影響を始めとする環境汚染の原因となっ
ている。従来から、これら排ガスの処理手段として、還
元性ガスに対しては燃2−−−−・
焼触媒が用いられ、これで処理できない酸化性ガスに対
しては湿式法で処理するなどの方法が用いられてきた。Gases emitted from factories, automobiles, household combustion appliances, etc. contain reducing gases such as CO and oxidizing gases such as NOx, which cause environmental pollution including effects on the human body. . Conventionally, as means for treating these exhaust gases, combustion catalysts have been used for reducing gases, and wet methods have been used for oxidizing gases that cannot be treated with these methods. has been used.
最近では、自動車排ガス処理として、貴金属を用いた三
元触媒方式が一部実用化されてきているが、この方式で
は酸化性ガスと還元性ガスが当量存在しなけnばならな
いという欠点を有していて、あらかじめ燃焼混合気を当
量組成になるよう制御する必要がある上、高温劣化など
の性能上の問題点やコスト面での問題点を抱えており、
普及に制隙がある。Recently, a three-way catalyst system using precious metals has been partially put into practical use for automobile exhaust gas treatment, but this system has the drawback that oxidizing gas and reducing gas must be present in equivalent amounts. However, it is necessary to control the combustion mixture in advance so that it has an equivalent composition, and there are performance problems such as high-temperature deterioration and cost problems.
There are gaps in its spread.
本発明のガス浄化用触媒体は、次の一般式で表されるペ
ロブスカイト型複合酸化物からなるものである。The gas purifying catalyst of the present invention is made of a perovskite-type composite oxide represented by the following general formula.
Ai −y、”x 5t−y B′ア03ただし、人は
希土類元素のうちから選ぶ一種の元素、A′はアルカリ
土類金属のうちから選ぶ一種ノ元素、BはGO1B′は
V、Or、Mn、Fe及びNiよシなる群から選ぶ一種
の元素、0は酸素をそれぞれ表し、O≦X≦1.○≦y
≦1である。Ai -y, "x 5t-y B'A03 However, humans are an element selected from rare earth elements, A' is an element selected from alkaline earth metals, B is GO1B' is V, Or , an element selected from the group consisting of Mn, Fe, and Ni, 0 represents oxygen, O≦X≦1.○≦y
≦1.
このペロブスカイト型複合酸化物VL1この酸化物を構
成する金属の〆q1.酸塩、シュ、つ酸塩まだd−硝酸
塩などの混合物を焼成することに、1:ってイ!Iられ
るが、前記の塩の混合溶液を含アルミナ担体、例えば多
孔性の管体やペレノ)・に含浸[7、焼成することによ
ってこれら担体に担持させるのが有利である。This perovskite type composite oxide VL1 is the metal constituting this oxide.q1. 1: When baking mixtures such as acid salts, oxalates, oxalates, d-nitrates, etc.! However, it is advantageous to impregnate an alumina-containing support, such as a porous tube or pereno, with a mixed solution of the above-mentioned salts [7], and to impregnate these supports by calcining.
また、触媒体の形状C:、前記の」:うな管体の担体に
担持させた触媒管として構成するのが有利であシ、この
管にペレット状の触媒を充」値すれば、さらに浄化効率
を向上さぜることかできる。In addition, it is advantageous to configure the catalyst body as a catalyst tube supported on a carrier having the shape C: of the above-mentioned cylindrical body. You can improve efficiency.
」−記のペロブスカイ)・型複合酸化物は、電子および
酸素イオンの混合導電体であるノζめ、酸化性ガスおよ
び還元性ガスの両方に対j7て触媒作用を示す点に特徴
を有する。即ち、酸化(’lガス、例えばNOxに対し
ては電子供与性を示してN2に変換し、酸素を格子にと
りこむ。」、た、還元性ガス、例えばGoに対してに1
逆に酸素イオンを供!J、シてCO2とする。格子から
引き抜か!1./ζ酸素V11、酸化性ガスから、ある
いに1大気から補給さカフる。従って、両性ガスが混在
する系では、当量外のガスは速やかに電子、酸素イオン
交換反応を介して反応するのはもちろん、どちらが一方
の過剰ガスも処理できるという特質をもっている。The perovsky) type composite oxide described in ``-'' is characterized by being a mixed conductor of electrons and oxygen ions and exhibiting a catalytic action against both oxidizing gases and reducing gases. That is, oxidation ('l gas, for example, NOx, exhibits electron donating property and converts it to N2, and oxygen is incorporated into the lattice.';
On the contrary, it provides oxygen ions! J, let it be CO2. Pull it out of the grid! 1. /ζOxygen V11, supplied from oxidizing gas or alternatively from atmospheric air. Therefore, in a system in which amphoteric gases coexist, gases other than the equivalent amount react quickly through electron and oxygen ion exchange reactions, and both have the characteristic of being able to treat excess gases.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
図面は本発明の触媒を用いた排ガス浄化装置を示す。触
媒管1には触媒ペレット2が充填されており、触媒管1
の外側は大気にさらされた状態にある。排ガス流入口3
から入った排ガスは、触媒管1および触媒ペレット2に
よって処理、低減され、流出口4から外部に排出される
。触媒ペレットを充填するのは、ペレットにで当量の酸
化性ガスと還元性ガスを反応させ、残部を触媒管で反応
させようという目的と、流入ガスがペレット層を通過す
る時に乱流状態になって充分に触媒と接触するようにす
る目的も併せ持っている。The drawing shows an exhaust gas purification device using the catalyst of the present invention. The catalyst tube 1 is filled with catalyst pellets 2, and the catalyst tube 1 is filled with catalyst pellets 2.
The outside is exposed to the atmosphere. Exhaust gas inlet 3
Exhaust gas that enters is treated and reduced by the catalyst tube 1 and the catalyst pellets 2, and is discharged to the outside from the outlet 4. The purpose of filling the catalyst pellets is to allow equivalent amounts of oxidizing gas and reducing gas to react in the pellets, and to react the remainder in the catalyst tube, and also to prevent the inflow gas from creating a turbulent flow as it passes through the pellet bed. It also has the purpose of ensuring sufficient contact with the catalyst.
次に、実施した構成と効果を述べる。触媒組成はL a
o 、 38 r o、7COo 、7 F f3
o、s O3を選び、この構成金属の酢酸塩を所定量蒸
留水に溶解した混合溶液を、見かけ気孔率約15ヂで内
径3omm、外径40記、長さ300層のアルミナ管に
真空含浸し、約400°Cで熱分解し/こ後、空気中1
100″Cで3時間焼成して触媒管とした。1、/こ、
見かけ気孔率約60%で直径3 rrrmのアルミナ球
に同じ触媒を同様にして担持さぜだものを触々!l(ペ
レットとj〜/ζ0そして10017の触媒ペレットを
触々111管に充:!fQ して排ガス浄化装置を構成
した。さらに比較例として、同じアルミナ球に、白金を
1 g+(’4i:%担持さぜたものと、内径の同じ石
英管を準備し、適宜組み合わせて用いた。Next, we will describe the implemented configuration and effects. The catalyst composition is La
o, 38 r o, 7COo, 7 F f3
o, s O3 was selected, and a mixed solution of a predetermined amount of the acetate of this constituent metal dissolved in distilled water was vacuum impregnated into an alumina tube with an apparent porosity of about 15 degrees, an inner diameter of 3 om, an outer diameter of 40 mm, and a length of 300 layers. and then thermally decomposed at about 400°C/After this, 1
A catalyst tube was obtained by firing at 100"C for 3 hours. 1.
The same catalyst was similarly supported on an alumina sphere with an apparent porosity of about 60% and a diameter of 3 rrrm! An exhaust gas purification device was constructed by filling 111 tubes with l(pellets and j~/ζ0 and 10017 catalyst pellets:!fQ.Furthermore, as a comparative example, 1 g+('4i: Quartz tubes with the same inner diameter as the one in which the sample was loaded were prepared and used in appropriate combinations.
反応ガスとしては、GO1%(体積比)、N。The reaction gases were GO 1% (volume ratio) and N.
0.5%、残部N2の混合ガスを用いて60分で触媒管
に流し、300′Cと600″Cで定常状態になった時
の流出ガス中のCOおよびNO譜度を測定した。その結
果を次表に示す。なお、データ幻、n=5の平均値で表
しだ。A mixed gas of 0.5% and the balance N2 was flowed into the catalyst tube for 60 minutes, and the CO and NO levels in the outflow gas were measured when the steady state was reached at 300'C and 600''C. The results are shown in the table below.The data is expressed as the average value of n=5.
以下余白
この結果から明らかなように、本発明の触媒を用いた排
ガス浄化KWの効果は者しい。触媒管と触媒ペレットは
、複合酸化物の焼結体で構成することもできるが、実際
の使用状態にあっては触媒の表面近傍層しか利用されな
いため、担体上に薄く担持させることは効率の面でも非
常に良く、実際、浄化能力に差はない。また、材料コス
ト、製造コストの面での効果も大きい。なお、実施例で
は、触媒ペレットを含浸法で作製したが、この他7・
−゛
にもスパッタ、溶射などの手段を用いることもできる。As is clear from the results, the effectiveness of the exhaust gas purification KW using the catalyst of the present invention is significant. Catalyst tubes and catalyst pellets can be composed of sintered composite oxides, but in actual use, only the layer near the surface of the catalyst is used, so it is not efficient to support them thinly on a carrier. In fact, there is no difference in purification ability. Moreover, the effect in terms of material cost and manufacturing cost is also large. In addition, in the examples, catalyst pellets were produced by an impregnation method, but in addition, 7.
- It is also possible to use means such as sputtering and thermal spraying.
【図面の簡単な説明】
図面は本発明の触媒を用いたJIJIガス浄化装置の要
部を示す一部断面見取図である。
1・・・・・・触媒管、2・・・・・触媒ペレット、3
・・・・・・(IJIガス流入口、4・・・・・・浄化
ガス流出11.。
代理人の氏名 弁理士 中 尾 敏 男 ほか1名1
りBRIEF DESCRIPTION OF THE DRAWINGS The drawing is a partial cross-sectional sketch showing the main parts of a JIJI gas purification apparatus using the catalyst of the present invention. 1...Catalyst tube, 2...Catalyst pellet, 3
......(IJI gas inlet, 4...Purified gas outflow 11.. Name of agent: Patent attorney Toshio Nakao and 1 other person 1)
the law of nature
Claims (1)
希土類元素から選ぶ一種の元素、A′はアルカリ土類金
属から選ぶ一種の元素、BはC01B′はV 、 Or
。 Ml、Fe及びNi よりなる群から選ぶ一種の元素
、0は酸素をそれぞれ表し、0≦X≦1.○≦y≦1で
ある。)で表されるペロブスカイト型複合酸化物からな
るガス浄化用触媒体。[Claims] General formula A1-X "X"1-7B'703 (However, A' is an element selected from rare earth elements, A' is an element selected from alkaline earth metals, B is C01B' is V , Or
. An element selected from the group consisting of Ml, Fe, and Ni, where 0 represents oxygen, and 0≦X≦1. ○≦y≦1. ) A catalyst body for gas purification consisting of a perovskite-type composite oxide.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56166201A JPS5867343A (en) | 1981-10-16 | 1981-10-16 | Catalytic body for purification of gas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56166201A JPS5867343A (en) | 1981-10-16 | 1981-10-16 | Catalytic body for purification of gas |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5867343A true JPS5867343A (en) | 1983-04-21 |
Family
ID=15826961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56166201A Pending JPS5867343A (en) | 1981-10-16 | 1981-10-16 | Catalytic body for purification of gas |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5867343A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62171750A (en) * | 1986-01-27 | 1987-07-28 | Mitsubishi Heavy Ind Ltd | Catalyst for simultaneously treating nitrogen oxide and carbon monoxide |
JPH01266851A (en) * | 1988-04-19 | 1989-10-24 | Res Dev Corp Of Japan | Y-ba-co compound oxide catalyst |
-
1981
- 1981-10-16 JP JP56166201A patent/JPS5867343A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62171750A (en) * | 1986-01-27 | 1987-07-28 | Mitsubishi Heavy Ind Ltd | Catalyst for simultaneously treating nitrogen oxide and carbon monoxide |
JPH0576342B2 (en) * | 1986-01-27 | 1993-10-22 | Mitsubishi Heavy Ind Ltd | |
JPH01266851A (en) * | 1988-04-19 | 1989-10-24 | Res Dev Corp Of Japan | Y-ba-co compound oxide catalyst |
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