JPH0616851B2 - Oxygen-defective perovskite catalyst - Google Patents
Oxygen-defective perovskite catalystInfo
- Publication number
- JPH0616851B2 JPH0616851B2 JP63072715A JP7271588A JPH0616851B2 JP H0616851 B2 JPH0616851 B2 JP H0616851B2 JP 63072715 A JP63072715 A JP 63072715A JP 7271588 A JP7271588 A JP 7271588A JP H0616851 B2 JPH0616851 B2 JP H0616851B2
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- oxygen
- reaction
- defective
- activity
- 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.)
- Expired - Lifetime
Links
- 239000003054 catalyst Substances 0.000 title claims description 42
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910020068 MgAl Inorganic materials 0.000 claims description 5
- 229910002515 CoAl Inorganic materials 0.000 claims description 4
- 229910002367 SrTiO Inorganic materials 0.000 claims description 4
- 239000003245 coal Substances 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 13
- 238000000354 decomposition reaction Methods 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000012876 carrier material Substances 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910020599 Co 3 O 4 Inorganic materials 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 101150061135 TBCA gene Proteins 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910007541 Zn O Inorganic materials 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Description
【発明の詳細な説明】 （技術分野） この発明は、酸素欠陥型ペロブスカイト触媒に関するも
のである。さらに詳しくは、この発明は、高温安定正に
優れ、廃ガス処理に優れた活性と選択性を有する新規な
ガス浄化用のペロブスカイト触媒に関するものである。TECHNICAL FIELD The present invention relates to an oxygen-defective perovskite catalyst. More specifically, the present invention relates to a novel perovskite catalyst for gas purification, which has excellent stability at high temperature and excellent activity and selectivity for treating waste gas.
（背景技術と発明の目的） ペロブスカイト化合物は、近年その触媒としての機能が
注目されはじめているものであり、特に、酸素欠陥を持
つペロブスカイト化合物は、その欠陥部が活性点となっ
て種々の反応に特異選択的な活性を示すことが明らかに
なってきている。(Background Art and Object of the Invention) Perovskite compounds have recently attracted attention for their function as catalysts, and in particular, perovskite compounds having oxygen deficiency cause the defective part to become an active site and cause various reactions. It has become clear that it exhibits specific selective activity.
たとえば、Ｌａ1-xＳｒｘＣｏＯ3-yの組成からなるペロ
ブスカイト化合物は、ＮＯの分解反応や炭化水素の酸化
反応に高い触媒活性を示すことが知られている。また、
ＮＯの分解触媒としては、その他にもＳｒＦｅＯ3-yの
組成からなる触媒も知られている。For example, it is known that a perovskite compound having a composition of La 1-x Sr x CoO 3-y exhibits high catalytic activity for NO decomposition reaction and hydrocarbon oxidation reaction. Also,
As a NO decomposition catalyst, a catalyst having a composition of SrFeO 3-y is also known.
しかしながら、これまでは、これらの高活性ペロブスカ
イト化合物からなる触媒は反応温度が高く、この点にお
いて実用に供するには充分なものではなかった。このよ
うな事情を踏まえて、この発明の発明者らは、酸素欠陥
型のペロブスカイト化合物の触媒活性の大きさに注目
し、より活性の大きい触媒の実現について検討を進めて
きた。その結果、この発明者らはＡ１Ａ′２Ｂ３Ｏ7-α
の組成を有する酸素欠陥型ペロブスカイト化合物がガス
浄化用触媒として高い活性を有することを見出した。However, hitherto, catalysts composed of these highly active perovskite compounds have a high reaction temperature, and in this respect, they are not sufficient for practical use. In view of such circumstances, the inventors of the present invention paid attention to the degree of catalytic activity of the oxygen-defective perovskite compound, and proceeded to study the realization of a catalyst having higher activity. As a result, the inventors have found that A 1 A ′ 2 B 3 O 7- α
It was found that the oxygen-defective perovskite compound having the above composition has a high activity as a gas purification catalyst.
しかもこのペロブスカイト化合物からなる触媒につい
て、この発明の発明者は極めて重要な知見を得ることが
でき、この知見にもとづいてこの発明を完成した。Moreover, the inventor of the present invention was able to obtain extremely important knowledge about the catalyst composed of this perovskite compound, and the present invention was completed based on this knowledge.
すなわち、Ａ１Ａ′２Ｂ３Ｏ7-αの酸素欠陥型ペロブス
カイト触媒は、比表面積が比較的大きく、難燃結性の担
体物質に担持することにより、より低い温度での触媒調
製が可能で、比表面積も大きく、かつ高温安定性により
優れたものとなることである。That is, the oxygen-defective perovskite catalyst of A 1 A ′ 2 B 3 O 7- α has a relatively large specific surface area, and by supporting it on a flame-retardant carrier material, it is possible to prepare the catalyst at a lower temperature. Therefore, the specific surface area is large and the high temperature stability is excellent.
このことを踏まえて、この発明は、高活性および高選択
性を有するとともに、これまで以上に高温安定性と、そ
の結果としての触媒寿命に優れたガス浄化用のペロブス
カイト触媒を提供することを目的としている。Based on this, the present invention has an object to provide a perovskite catalyst for gas purification, which has high activity and high selectivity, and is more stable than ever before at high temperature and, as a result, is excellent in catalyst life. I am trying.
（発明の開示） この発明の酸素欠陥ペロブスカイト触媒は、次式 Ａ１Ａ′２Ｂ３Ｏ7-α （ここで、Ａは、Ｙおよび希土類元素から選ばれる少く
とも１種の元素、Ａ′は、Ｂａ，ＳｒおよびＣａから選
ばれる少くとも１種の元素、Ｂは、Ｃｕ，Ｍｎおよび鉄
族元素から選ばれる少くとも１種の元素を示し、０≦α
≦１である。） で表わされる複合酸化物が、ＭｇＯ，ＺｒＯ２，Ｚｎ
Ｏ，ＳｒＴｉＯ３，ＣｏＡｌ２Ｏ４，ＺｎＡｌ２Ｏ４お
よびＭｇＡｌ２Ｏ４から選ばれる少くとも１種の酸化物
担体に担持された、比表面積が１０〜３５m2／ｇの触媒
からなることを特徴とするガス浄化用と酸素欠陥型ペロ
ブスカイト触媒であることを特徴としている。DISCLOSURE OF THE INVENTION The oxygen-defective perovskite catalyst of the present invention has the following formula A 1 A ′ 2 B 3 O 7- α (where A is at least one element selected from Y and rare earth elements, A ′). Represents at least one element selected from Ba, Sr and Ca, B represents at least one element selected from Cu, Mn and an iron group element, and 0 ≦ α
≦ 1. ) Is a complex oxide represented by MgO, ZrO 2 , Zn
O, SrTiO 3 , CoAl 2 O 4 , ZnAl 2 O 4 and MgAl 2 O 4 supported on at least one kind of oxide carrier, which comprises a catalyst having a specific surface area of 10 to 35 m 2 / g. It is characterized by being a gas purifying and oxygen-defective perovskite catalyst.
このＡ１Ａ′２Ｂ３Ｏ7-αの組成からなる酸素欠陥ペロ
ブスカイト触媒は、Ａサイトの周囲に酸素空孔を有し、
また４５０〜９５０℃程度の温度範囲においてさらに酸
素が脱けて、この欠陥部が活性サイトとして作用すると
いう特徴を有している。この触媒の活性は、これまでの
ペロブスカイト化合物には見ることのできない優れたも
のである。その理由としては、推定ではあるが、低温域
において存在する酸素空孔と、高温域で出現する酸素空
孔との２種類の空孔が存在するために、その相互作用に
よって優れた活性作用を示すものと考えられる。This oxygen-defective perovskite catalyst having a composition of A 1 A ′ 2 B 3 O 7- α has oxygen vacancies around the A site,
Further, it has a feature that oxygen is further released in a temperature range of about 450 to 950 ° C., and this defective portion acts as an active site. The activity of this catalyst is excellent, which cannot be found in conventional perovskite compounds. The reason for this is, presumably, that there are two types of vacancies, that is, oxygen vacancies that exist in the low temperature range and oxygen vacancies that appear in the high temperature range. It is considered to indicate.
Ａ１Ａ′２Ｂ３Ｏ7-αの組成のうちのＡサイトについて
はＹおよび希土類元素の１種または２種以上とするが、
たとえば、Ｙ，Ｌａ，Ｐｒ，Ｐｍ，Ｓｍ，Ｅｕ，Ｇｄ，
Ｔｂ，Ｄｙ，Ｈｏ，Ｅｒ，Ｔｍ，Ｌｕなどの元素が好ま
しいものとして例示される。Ａ′サイトについては、Ｂ
ａ，ＳｒおよびＣａ１種以上のものとする。Regarding the A site in the composition of A 1 A ′ 2 B 3 O 7− α, one or more kinds of Y and rare earth elements are used.
For example, Y, La, Pr, Pm, Sm, Eu, Gd,
Elements such as Tb, Dy, Ho, Er, Tm and Lu are exemplified as preferable ones. B for A'site
One or more of a, Sr and Ca.
Ｂサイトについては、Ｃｕ，Ｍｎ，および鉄族元素、す
なわち、Ｎｉ，Ｆｅ，Ｃｏから選ばれる少くとも１種と
する。The B site is at least one selected from Cu, Mn, and iron group elements, that is, Ni, Fe, and Co.
また、この発明の酸素欠陥型ペロブスカイト触媒は担体
に担持させるが、その際の担体物質としては、比較的に
表面積が大きく、触媒調製時や反応への使用時に高温で
難燃結性のものを好ましく用いることができる。Further, the oxygen-defective perovskite catalyst of the present invention is supported on a carrier, and as the carrier substance at that time, one having a relatively large surface area and a flame retardant binding property at high temperature during catalyst preparation or use for reaction is used. It can be preferably used.
担体物質としては、ＭｇＯ，ＺｒＯ２，ＺｎＯの単一元
素の酸化物や、ＳｒＴｉＯ３，ＣｏＡｌ２Ｏ４，ＺｎＡ
ｌ２Ｏ４，ＭｇＡｌ２Ｏ４の複合酸化物担体が好適なも
のとしてある。これらは市販のものや、あるいは反応に
よって製造したものを適宜に用いることができる。たと
えば、ＳｒＴｉＯ３，ＣｏＡｌ２Ｏ４，ＺｎＡｌ
２Ｏ４，ＭｇＡｌ２，Ｏ４は、アルコキシド法によって
高比表面積のものを容易に作製することができる。As the carrier material, oxides of a single element such as MgO, ZrO 2 and ZnO, SrTiO 3 , CoAl 2 O 4 and ZnA are used.
A composite oxide carrier of 1 2 O 4 and MgAl 2 O 4 is preferable. Commercially available products or products produced by reaction can be appropriately used. For example, SrTiO 3 , CoAl 2 O 4 , ZnAl
2 O 4 , MgAl 2 , and O 4 having a high specific surface area can be easily produced by the alkoxide method.
この発明の触媒は、その有機酸の金属塩の有機溶媒溶液
中に、上記の担体物質を分散させた後に蒸発乾固し、大
気中で、たとえば７００〜９００℃の温度で焼成するこ
とにより容易に得ることができる。もちろん、この方法
に限定されるものではなく、様々な調製手段を採用する
ことができる。The catalyst of the present invention is easily prepared by dispersing the above-mentioned carrier material in an organic solvent solution of a metal salt of the organic acid, evaporating to dryness, and calcining in the air at a temperature of, for example, 700 to 900 ° C. Can be obtained. Of course, the method is not limited to this, and various preparation means can be adopted.
また、この発明においては、後述の実施例からも明らか
なように、担体担持触媒としての比表面積は、１０〜３
５m2／ｇとする。Further, in the present invention, as is apparent from the examples described below, the specific surface area of the carrier-supported catalyst is 10 to 3
It is 5 m 2 / g.
以上の通りこの発明の酸素欠陥型ペロブスカイト触媒
は、廃ガス処理に有効に用いることができる。As described above, the oxygen-defective perovskite catalyst of the present invention can be effectively used for waste gas treatment.
以下、この発明の実施例を示し、さらに詳しくこの発明
について説明する。Examples of the present invention will be shown below, and the present invention will be described in more detail.
実施例 １ ＭｇＯの担体を用い、これにＹＢａ２Ｃｕ３Ｏ7-αの酸
素欠陥型ペロブスカイト化合物を１０重量％担持した触
媒とした。Example 1 A catalyst was prepared by using a carrier of MgO and carrying 10 wt% of an oxygen-defective perovskite compound of YBa 2 Cu 3 O 7- α.
この触媒を粉末状で石英管に充填し、Ｈｅで希釈したＮ
Ｏガスをこの石英管内に流通させてＮＯの分解反応を行
った。反応温度は６００〜８００℃とし、空間速度（Ｓ
Ｖ）は１５００ｈｒ-1（３％ＮＯ／Ｈｅガス）とした。
触媒の使用量は２．５ｇとした。This catalyst was packed into a quartz tube in powder form, and diluted with He.
O gas was circulated in the quartz tube to decompose NO. The reaction temperature is 600 to 800 ° C., and the space velocity (S
V) was 1500 hr −1 (3% NO / He gas).
The amount of catalyst used was 2.5 g.
反応生成ガスはガスクロマトグラフイーにより分析し
た。The reaction product gas was analyzed by gas chromatography.
なお、触媒の活性評価は、定常的な活性評価とするため
に、反応開始後１０時間以上経過した後に行った。The activity of the catalyst was evaluated 10 hours or more after the start of the reaction in order to evaluate the activity constantly.
この触媒の比表面積は２５m2／ｇであり、また、反応開
始後１０時間以上のＮＯの分解率は、 （反応温度） （ＮＯ分解率） ６００℃ ５０．０％ ７００℃ ７７．０％ ８００℃ ８９．５％ であり、６００〜７００℃の低温度においても、また８
００℃の高温度においても極めて高い活性を示し、しか
も、１０時間以上経過した状態でこのような高い活性が
実現されていた。The specific surface area of this catalyst is 25 m 2 / g, and the decomposition rate of NO for 10 hours or more after the start of the reaction is (reaction temperature) (NO decomposition rate) 600 ° C. 50.0% 700 ° C. 77.0% 800 ℃ 89.5%, even at a low temperature of 600 ~ 700 ℃, 8
It showed extremely high activity even at a high temperature of 00 ° C., and even after 10 hours or more, such high activity was realized.
この活性は、後述の比較例に比べてはるかに高いもので
ある。This activity is much higher than that of the comparative example described later.
実施例２〜８，比較例１〜７ 実施例１と同様にして、表１に示した各種の組成からな
る触媒を調製し、同様にしてＮＯの分解反応を行った。
その結果を示したものが表１である。Examples 2 to 8 and Comparative Examples 1 to 7 In the same manner as in Example 1, catalysts having various compositions shown in Table 1 were prepared, and NO decomposition reaction was performed in the same manner.
Table 1 shows the result.
また、比較のために、市販のＣｏ３Ｏ４、0.5％Ｐｔ／
Ａｌ２Ｏ３，0.5％Ｉｒ／Ａｌ２Ｏ３等の各種触媒につ
いても同様にしてその活性を評価した。反応の結果を示
したものが次の表１である。この表１から明らかなよう
に、この発明の触媒においては、低温度においても、ま
た８０℃の高温度においても、極めて高いＮＯ分解率を
示している。For comparison, commercially available Co 3 O 4 , 0.5% Pt /
The activity of various catalysts such as Al 2 O 3 and 0.5% Ir / Al 2 O 3 was evaluated in the same manner. The results of the reaction are shown in Table 1 below. As is clear from Table 1, the catalyst of the present invention exhibits an extremely high NO decomposition rate even at a low temperature and at a high temperature of 80 ° C.
また、第１図には、反応経過時間（ｈｒ）による分解率
の変化を、実施例５の触媒と、比較例１および比較例２
について示している。この第１図から明らかなように、
従来の触媒の場合には１時間後にはＮＯ分解率は急速に
低下し、６時間後には初期の１／１０にまで低下する
が、この発明の触媒の場合には、１０時間以上経過して
も活性の低下は見られない。触媒は高活性であり、その
寿命にも優れている。In addition, FIG. 1 shows the change in the decomposition rate depending on the elapsed time (hr) of the reaction, for the catalyst of Example 5, Comparative Example 1 and Comparative Example 2.
Is shown. As is clear from FIG. 1,
In the case of the conventional catalyst, the NO decomposition rate rapidly decreases after 1 hour, and decreases to 1/10 of the initial value after 6 hours. However, in the case of the catalyst of the present invention, 10 hours or more have passed. However, the activity is not decreased. The catalyst is highly active and has a long life.
実施例９〜１３ 実施例１と同様にして次に各種の組成からなる触媒を調
製した。 Examples 9 to 13 In the same manner as in Example 1, catalysts having various compositions were prepared next.
６％ＰｒＢａＣａ（Ｍｎ1.5Ｃｏ1.5）Ｏ7-α／ＺｎＯ １０％ＴｂＣａ２（Ｃｕ1.5Ｆｅ1.5）Ｏ7-α／ＺｎＡｌ
２Ｏ４ ５％ＤｙＳｒ２（Ｆｅ1.5Ｃｏ1.5）Ｏ7-α／ＭｇＡｌ２
Ｏ４ ５％ＥｕＢａ２Ｃｕ３Ｏ7-α／ＭｇＯ ５％ＨｏＳｒＢａ（Ｃｕ2.5Ｍｎ0.5）Ｏ7-α／ＺｎＯ２ これらの触媒を用いて、同様にしてＮＯの分解反応を行
い、いずれの場合にも、反応開始後１０時間以上におい
て、７００℃の反応温度で６５％以上、８００℃の反応
温度で８５％以上のＮＯ分解率を得た。6% PrBaCa (Mn 1.5 Co 1.5 ) O 7- α / ZnO 10% TbCa 2 (Cu 1.5 Fe 1.5 ) O 7- α / ZnAl
2 O 4 5% DySr 2 (Fe 1.5 Co 1.5 ) O 7- α / MgAl 2
O 4 5% EuBa 2 Cu 3 O 7- α / MgO 5% HoSrBa (Cu 2.5 Mn 0.5 ) O 7- α / ZnO 2 NO decomposition reaction is similarly performed using these catalysts, and in any case In addition, NO decomposition rates of 65% or more at a reaction temperature of 700 ° C. and 85% or more at a reaction temperature of 800 ° C. were obtained 10 hours or more after the start of the reaction.
第１図は、この発明の触媒と比較例の触媒のＮＯ分解率
を反応経過時間との関連で示した相関図である。FIG. 1 is a correlation diagram showing the NO decomposition rate of the catalyst of the present invention and the catalyst of the comparative example in relation to the reaction elapsed time.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭64−30649（ＪＰ，Ａ) 特開 昭64−30648（ＪＰ，Ａ) 特開 昭64−30647（ＪＰ，Ａ) 特開 昭64−30645（ＪＰ，Ａ) 特開 昭64−30644（ＪＰ，Ａ) 特開 昭64−30643（ＪＰ，Ａ) 特開 昭64−30642（ＪＰ，Ａ) 特開 昭64−30641（ＪＰ，Ａ) 特開 昭64−30631（ＪＰ，Ａ) 特開 昭64−30630（ＪＰ，Ａ) 特開 昭64−30629（ＪＰ，Ａ) 特開 昭64−30628（ＪＰ，Ａ) 特開 昭64−30627（ＪＰ，Ａ) 特開 昭64−30573（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-64-30649 (JP, A) JP-A-64-30648 (JP, A) JP-A-64-30647 (JP, A) JP-A-64- 30645 (JP, A) JP 64-30644 (JP, A) JP 64-30643 (JP, A) JP 64-30642 (JP, A) JP 64-30641 (JP, A) JP 64-30631 (JP, A) JP 64-30630 (JP, A) JP 64-30629 (JP, A) JP 64-30628 (JP, A) JP 64-30627 (JP, A) JP-A-64-30573 (JP, A)
Claims (1)
の元素、Ａ′は、Ｂａ，ＳｒおよびＣａから選ばれる少
くとも１種の元素、Ｂは、Ｃｕ，Ｍｎおよび鉄族元素か
ら選ばれる少くとも１種の元素を示し、０≦α≦１であ
る。） で表わされる複合酸化物が、ＭｇＯ，ＺｒＯ２，Ｚｎ
Ｏ，ＳｒＴｉＯ３，ＣｏＡｌ２Ｏ４，ＺｎＡｌ２Ｏ４お
よびＭｇＡｌ２Ｏ４から選ばれる少くとも１種の酸化物
担体に担持された、比表面積が１０〜３５m2／ｇの触媒
からなることを特徴とするガス浄化用の酸素欠陥型ペロ
ブスカイト触媒。1. The following formula A 1 A ′ 2 B 3 O 7- α (A is at least one element selected from Y and rare earth elements, and A ′ is at least one element selected from Ba, Sr and Ca. One kind of element, B represents at least one kind of element selected from Cu, Mn and an iron group element, and 0 ≦ α ≦ 1.) Is a composite oxide represented by MgO, ZrO 2 , Zn.
O, SrTiO 3 , CoAl 2 O 4 , ZnAl 2 O 4 and MgAl 2 O 4 supported on at least one kind of oxide carrier, which comprises a catalyst having a specific surface area of 10 to 35 m 2 / g. Oxygen-defective perovskite catalyst for gas purification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63072715A JPH0616851B2 (en) | 1988-03-25 | 1988-03-25 | Oxygen-defective perovskite catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63072715A JPH0616851B2 (en) | 1988-03-25 | 1988-03-25 | Oxygen-defective perovskite catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01245851A JPH01245851A (en) | 1989-10-02 |
| JPH0616851B2 true JPH0616851B2 (en) | 1994-03-09 |
Family
ID=13497326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63072715A Expired - Lifetime JPH0616851B2 (en) | 1988-03-25 | 1988-03-25 | Oxygen-defective perovskite catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0616851B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607196A (en) * | 2010-02-17 | 2015-05-13 | 美国能源部 | Method of preparing and utilizing a catalyst system for oxidation process on a gaseous hydrocarbon system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0616852B2 (en) * | 1988-04-19 | 1994-03-09 | 新技術事業団 | Y-Ba-Co composite oxide catalyst |
| JPH02261541A (en) * | 1989-03-31 | 1990-10-24 | Babcock Hitachi Kk | Nitrogen monoxide decomposing catalyst |
| DE19516920A1 (en) * | 1995-05-09 | 1996-11-14 | Daimler Benz Ag | Material and process for the adsorption and desorption of nitrogen oxides in exhaust gases |
| AUPP607398A0 (en) * | 1998-09-21 | 1998-10-15 | University Of Queensland, The | Catalysts and process for reforming of hydrocarbons |
| JP5327526B2 (en) * | 2009-03-05 | 2013-10-30 | 日産自動車株式会社 | Oxidation catalyst and method for producing the same |
| CN113083267B (en) * | 2021-03-31 | 2022-06-03 | 天津城建大学 | TiO for degrading rhodamine B through photoelectrocatalysis2/Ce-BaTiO3Preparation method of composite film material |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6430631A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Burner |
| JPS6430642A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Catalyst for purifying exhaust gas |
| JPS6430647A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Catalyst for purifying exhaust gas |
| JPS6430649A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Nox decomposition catalyst |
| JPS6430630A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Burner |
| JPS6430628A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Burner |
| JPS6430629A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Burner |
| JPS6430645A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Nox decomposition catalyst |
| JPH0714481B2 (en) * | 1987-07-24 | 1995-02-22 | 松下電器産業株式会社 | Exhaust gas purification catalyst |
| JPS6430627A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Air filter |
| JPS6430573A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Tobacco filter |
| JPS6430648A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Nox decomposition catalyst |
| JPS6430643A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Catalyst for purifying exhaust gas |
| JPS6430644A (en) * | 1987-07-24 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Nox decomposition catalyst |
-
1988
- 1988-03-25 JP JP63072715A patent/JPH0616851B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607196A (en) * | 2010-02-17 | 2015-05-13 | 美国能源部 | Method of preparing and utilizing a catalyst system for oxidation process on a gaseous hydrocarbon system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01245851A (en) | 1989-10-02 |
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