JPH0464737B2 - - Google Patents
Info
- Publication number
- JPH0464737B2 JPH0464737B2 JP59219639A JP21963984A JPH0464737B2 JP H0464737 B2 JPH0464737 B2 JP H0464737B2 JP 59219639 A JP59219639 A JP 59219639A JP 21963984 A JP21963984 A JP 21963984A JP H0464737 B2 JPH0464737 B2 JP H0464737B2
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- exhaust gas
- activity
- temperature
- srzr
- 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 claims description 18
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 229910052735 hafnium Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 4
- 229910002367 SrTiO Inorganic materials 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010285 flame spraying Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910017060 Fe Cr Inorganic materials 0.000 description 1
- 229910002544 Fe-Cr Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Description
産業上の利用分野
本発明は、各種の燃焼機器から排出される排気
ガス中の有害ガス成分を浄化処理する触媒体に関
するものである。
従来の技術
各種の燃焼機器（ガス・石油ストーブ、ボイラ
ー、自動車エンジンなど）から排出される排気ガ
スの主要な有害ガス成分であるCOとNOXを同時
に浄化処理する触媒として、ペロブスカイト型複
合酸化物である
INDUSTRIAL APPLICATION FIELD The present invention relates to a catalyst body that purifies harmful gas components in exhaust gas discharged from various combustion devices. Conventional technology Perovskite-type composite oxide is used as a catalyst to simultaneously purify CO and NO is
【式】
（Me＝Fe、Mn、Cr、Ｖから選ぶ１種の元素、Ｏ
＜ｘ＜１）とSrTiO3とからなる２成分系の物質
が提案されている。
発明が解決しようとする問題点
上記の触媒体では600℃以下の触媒活性が低く、
適用温度は800℃以上と限定されていた。本発明
はかかる点に鑑みてなされたもので、触媒として
の活性温度領域を500℃まで広げた排気ガス浄化
触媒を提供することを目的とする。
問題点を解決するための手段
本発明は上記問題点を解決するために、触媒体
に[Formula] (Me=one element selected from Fe, Mn, Cr, V, O
<x<1) and SrTiO 3 have been proposed. Problems to be solved by the invention The above catalyst has low catalytic activity below 600°C.
The applicable temperature was limited to 800℃ or higher. The present invention has been made in view of this point, and an object of the present invention is to provide an exhaust gas purification catalyst whose active temperature range as a catalyst is expanded to 500°C. Means for Solving the Problems In order to solve the above problems, the present invention provides a catalyst for solving the above problems.
【式】とAB1-yAlyO3（Ａ
＝Sr、Ca Ｂ＝Ti、Zr、Hf、Ｏ＜ｘ＜１、Ｏ＜
ｙ＜１）を用いる事で低温高活性の触媒を提供し
ようとするものである。
作 用
ペロブスカイト型複合酸化物を酸化還元同時触
媒に用いる時、その触媒活性は酸素イオン導電量
に対応する。そこで上記試料を触媒体に用いると
低温度領域から既に大きい酸素イオン導電性を有
しており、その結果、低温度領域においても高活
性を有するようになる。
実施例
実施例 １
第１図および第２図に本発明になる担持型触媒
体の特性を従来例と共に示す。触媒成分には
Sr0.65La0.35Co0.7Fe0.3O355mol％とSrZr0.8Al0.2
O345mol％からなる２成分系の材料（200メツシ
ユ以下）を用い、担体にはFe−Cr系の耐熱金網
（40メツシユ相当、φ24mm）を用いた。実施例及
び従来例共に触媒体の担持体への接着法は、金網
表面に水素炎溶射により約100μｍの厚さに均一
に付着させたものを用いた。
この触媒体を５枚重ねて石英ガラス製の反応容
器内に設置し、電気炉で温度制御を行なつて活性
を測定した。反応ガスにはCO150ppm、
NO250ppm.、N2残部からなる均一混合ガスを用
い、空間速度8300h-1で触媒層に供給した。第１
図にCO除去率、第２図にNO及びN2生成率をそ
れぞれ示した。図を見れば分かるようにSrTiO3
を用いた従来例よりもSrZr0.8Al0.2O3を用いた本
実施例のほうが活性は高く、より低温域から排ガ
スの浄化能力を有すると言える。これは、
SrTiO3よりもSrZr0.8Al0.2O3のほうがより低温か
ら酸素イオン導電量が大きいためと考えられる。
実施例 ２
次に、セラミツク製担体に担持した場合の例を
示す。所倍成分はSr0.65La0.35Co0.7Fe0.3O3と
CaHf0.8Al0.2O3とをモル比0.65：0.35で混合した
ものを用いた。
担体にはアルミナ製のハニカム成型体（φ110
mm×t10mm、３mm□セル、セル数約500）を用い
た。実施例及び従来例ともにこの担体表面に水素
炎溶射により触媒体を約200μｍの厚さに付着さ
せたものを用いた。これらの触媒体１枚を市販の
ポータブル型石油ストーブの燃焼筒の上部に取り
付け、触媒体通過後の排気ガス中のCO濃度及び
NOx（＝NO＋NO2）濃度を測定した。排気ガス
温度は約700℃である。その結果を第１表に示す。[Formula] and AB 1-y Al y O 3 (A = Sr, Ca B = Ti, Zr, Hf, O<x<1, O<
By using y<1), it is intended to provide a catalyst with high activity at low temperatures. Function When a perovskite-type composite oxide is used as a simultaneous redox catalyst, its catalytic activity corresponds to the amount of oxygen ion conductivity. Therefore, when the above sample is used as a catalyst, it already has high oxygen ion conductivity even in the low temperature range, and as a result, it has high activity even in the low temperature range. Examples Example 1 FIGS. 1 and 2 show the characteristics of the supported catalyst according to the present invention together with a conventional example. For catalyst components
Sr 0.65 La 0.35 Co 0.7 Fe 0.3 O 3 55mol% and SrZr 0.8 Al 0.2
A two-component material (200 mesh or less) consisting of 45 mol% O 3 was used, and a Fe-Cr heat-resistant wire mesh (equivalent to 40 mesh, φ24 mm) was used as the carrier. In both Examples and Conventional Examples, the catalyst was adhered to the support by uniformly adhering it to the surface of a wire mesh to a thickness of about 100 μm by hydrogen flame spraying. Five sheets of this catalyst were stacked and placed in a reaction vessel made of quartz glass, the temperature was controlled in an electric furnace, and the activity was measured. Reaction gas contains CO150ppm,
A homogeneous mixed gas consisting of 50 ppm of NO 2 and the remainder of N 2 was supplied to the catalyst layer at a space velocity of 8300 h -1 . 1st
The figure shows the CO removal rate, and Figure 2 shows the NO and N 2 production rates. As you can see from the figure, SrTiO 3
It can be said that this example using SrZr 0.8 Al 0.2 O 3 has higher activity than the conventional example using SrZr 0.8 Al 0.2 O 3 and has the ability to purify exhaust gas from a lower temperature range. this is,
This is thought to be because SrZr 0.8 Al 0.2 O 3 has a larger oxygen ion conductivity than SrTiO 3 from a lower temperature. Example 2 Next, an example will be shown in which it is supported on a ceramic carrier. The components are Sr 0.65 La 0.35 Co 0.7 Fe 0.3 O 3
A mixture of CaHf 0.8 Al 0.2 O 3 at a molar ratio of 0.65:0.35 was used. The carrier is an alumina honeycomb molded body (φ110
mm×t10mm, 3mm□ cell, approximately 500 cells) was used. In both the example and the conventional example, a catalyst having a thickness of about 200 μm was applied to the surface of this carrier by hydrogen flame spraying. One of these catalysts is attached to the top of the combustion tube of a commercially available portable kerosene stove, and the CO concentration and
NO x (=NO+NO 2 ) concentration was measured. Exhaust gas temperature is approximately 700℃. The results are shown in Table 1.
【表】
表から明らかなように、実施例は優れた活性を
示す。
発明の効果
以上述べてきたように、触媒成分として従来の
SrTiO3のかわりにAB1-yAlyO3（Ａ＝Caまたは
Sr、Ｂ＝TiまたはZrまたはHf、Ｏ＜ｙ＜１）を
用いる事により酸素イオン導電量を大きく増加せ
しめ、その結果、触媒作用を効果的に増幅できる
ものである。[Table] As is clear from the table, the examples show excellent activity. Effects of the invention As stated above, conventional
AB 1-y Al y O 3 ( A=Ca or
By using Sr, B=Ti, Zr or Hf, O<y<1), the amount of oxygen ion conductivity can be greatly increased, and as a result, the catalytic action can be effectively amplified.
第１図は温度とCO除去率の関係図、第２図は
温度とNO及びN2生成率との関係図である。
FIG. 1 is a diagram showing the relationship between temperature and CO removal rate, and FIG. 2 is a diagram showing the relationship between temperature and NO and N 2 production rates.
Claims (1)
１）で表わされる酸化物と、AB1-yAlyO3（Ａ＝
CaまたはSr、Ｂ＝TiまたはZrまたはHf、Ｏ＜ｙ
＜１）との混合２成分系からなる物質を触媒体と
する排気ガス浄化触媒体。[Claims] 1 General formula [Formula] (Me= one element selected from Fe, Mn, Cr, V, O<x<
1) and AB 1-y Al y O 3 (A=
Ca or Sr, B=Ti or Zr or Hf, O<y
<1) An exhaust gas purification catalyst body using a substance consisting of a mixed two-component system as a catalyst body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59219639A JPS6197032A (en) | 1984-10-19 | 1984-10-19 | Catalyst body for purifying exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59219639A JPS6197032A (en) | 1984-10-19 | 1984-10-19 | Catalyst body for purifying exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6197032A JPS6197032A (en) | 1986-05-15 |
| JPH0464737B2 true JPH0464737B2 (en) | 1992-10-15 |
Family
ID=16738676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59219639A Granted JPS6197032A (en) | 1984-10-19 | 1984-10-19 | Catalyst body for purifying exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6197032A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11013841B2 (en) | 2019-09-28 | 2021-05-25 | Choon Kee Lee | Centrifugal-dialysate-flow hemodializer |
| US11040128B1 (en) | 2020-01-25 | 2021-06-22 | Choon Kee Lee | Integrated motorized hemodialyzer |
| US11071951B2 (en) | 2019-09-29 | 2021-07-27 | Choon Kee Lee | Centrifugal gradient dialysate dual-chamber hemodiafiltrator |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63158130A (en) * | 1986-12-23 | 1988-07-01 | Tech Res Assoc Conduct Inorg Compo | Catalyst for purifying exhaust gas |
| YU47516B (en) * | 1990-06-21 | 1995-10-03 | Ihtm-Oour Institut Za Katalizu I Hemijsko Inženjerstvo, Rj Kataliza | PEROVSKIT MATERIALS, CATALYSTS AND PEROVSKIT OBTAINING PROCEDURE |
-
1984
- 1984-10-19 JP JP59219639A patent/JPS6197032A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11013841B2 (en) | 2019-09-28 | 2021-05-25 | Choon Kee Lee | Centrifugal-dialysate-flow hemodializer |
| US11071951B2 (en) | 2019-09-29 | 2021-07-27 | Choon Kee Lee | Centrifugal gradient dialysate dual-chamber hemodiafiltrator |
| US11040128B1 (en) | 2020-01-25 | 2021-06-22 | Choon Kee Lee | Integrated motorized hemodialyzer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6197032A (en) | 1986-05-15 |
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