JPH03157143A - Catalyst for purification of exhaust gas from motorcycle - Google Patents
Catalyst for purification of exhaust gas from motorcycleInfo
- Publication number
- JPH03157143A JPH03157143A JP1296241A JP29624189A JPH03157143A JP H03157143 A JPH03157143 A JP H03157143A JP 1296241 A JP1296241 A JP 1296241A JP 29624189 A JP29624189 A JP 29624189A JP H03157143 A JPH03157143 A JP H03157143A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- metal
- wire mesh
- motorcycle
- exhaust gas
- 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 71
- 238000000746 purification Methods 0.000 title abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 24
- 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 20
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 14
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 11
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 11
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 12
- 238000004080 punching Methods 0.000 claims description 12
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims 2
- 238000010304 firing Methods 0.000 claims 2
- 239000010948 rhodium Substances 0.000 claims 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims 1
- 239000010970 precious metal Substances 0.000 claims 1
- 229910052703 rhodium Inorganic materials 0.000 claims 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 8
- 239000002002 slurry Substances 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003426 co-catalyst Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- GPNDARIEYHPYAY-UHFFFAOYSA-N palladium(ii) nitrate Chemical compound [Pd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O GPNDARIEYHPYAY-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は、オートバイの排気ガス浄化用触媒に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a catalyst for purifying motorcycle exhaust gas.
更に詳しくは、オートバイの排気管内に装着可能で排気
ガス浄化性能、背圧特性及び耐久性にすぐれたオートバ
イの排気ガス浄化用触媒に関するものである。More specifically, the present invention relates to a catalyst for purifying motorcycle exhaust gas that can be installed in the exhaust pipe of a motorcycle and has excellent exhaust gas purification performance, back pressure characteristics, and durability.
(従来の技術)
内燃機関からの排気ガスによる環境汚染は大きな社会問
題となり、過去種々の排気ガス浄化方法が検討されたが
、現在では、自動車排ガス浄化用触媒に見られるように
、ハニカム状の触媒が排気ガス浄化方法の主流となって
いる。このハニカム状の触媒は、300〜400セル/
in’(平方インチ)のガス流路をもつ一体構造体でコ
ンバーター内に収容されて排気ガスラインに装着される
が、オートバイの排気ガス浄化用に使用する場合は、自
動車の場合とは異なりコンバーターの設置スペースの問
題と、ハニカム触媒による背圧上昇の問題が大きく、特
に小型のオートバイについては、運転性能に支障をきた
し、実使用が困難である。(Prior art) Environmental pollution caused by exhaust gas from internal combustion engines has become a major social problem, and various exhaust gas purification methods have been studied in the past. Catalysts have become the mainstream method for purifying exhaust gas. This honeycomb-shaped catalyst has 300 to 400 cells/
It is a one-piece structure with a gas flow path of 1.5 in (square inch) and is housed in the converter and attached to the exhaust gas line, but when used for motorcycle exhaust gas purification, unlike in the case of automobiles, the converter is The problems of installation space and increased back pressure caused by the honeycomb catalyst are significant, and this impedes driving performance, especially for small motorcycles, making it difficult to use in practice.
このため、オートバイの排気ガス浄化用触媒としては、
特開昭54mm、17816号や、特開昭50−891
2号に見られるように、布状の触媒を排気管内壁に設置
する触媒浄化装置が提案されているが、オートバイの運
転中の振動や排気ガス流の振動によって布状触媒の摩耗
が起こり、耐久性の点で問題があった。また、排気管内
壁に直接触媒物質を塗布する方法も考えられるが、この
方法では触媒と排気ガスとの接触が少ないため、満足な
浄化性能が得られない欠点があった。Therefore, as a catalyst for purifying motorcycle exhaust gas,
JP-A-54mm, No. 17816, JP-A-50-891
As seen in No. 2, a catalyst purification device in which a cloth-like catalyst is installed on the inner wall of the exhaust pipe has been proposed, but the cloth-like catalyst wears out due to vibrations during motorcycle operation and vibrations in the exhaust gas flow. There was a problem with durability. Another possibility is to apply the catalyst substance directly to the inner wall of the exhaust pipe, but this method has the disadvantage that satisfactory purification performance cannot be obtained because there is little contact between the catalyst and the exhaust gas.
(本発明が解決しようとする問題点)
本発明は、こうした従来の欠点を克服し、低背圧で、か
つ高い排気ガス浄化性能を有する耐久性にすぐれたオー
トバイの排気ガス浄化用触媒を提供するものである。(Problems to be Solved by the Present Invention) The present invention overcomes these conventional drawbacks and provides a highly durable catalyst for purifying motorcycle exhaust gas, which has low back pressure and high exhaust gas purification performance. It is something to do.
(問題を解決するための手段)
本発明による触媒は、AI及びCrを含有するフェライ
ト系ステンレス鋼の金網又はパンチングメタル担体と、
その上に付着された貴金属を含有する無機金属酸化物と
、から構成される。(Means for solving the problem) The catalyst according to the present invention comprises a wire mesh or punched metal carrier of ferritic stainless steel containing AI and Cr,
an inorganic metal oxide containing a noble metal deposited thereon.
本発明者らは、触媒の形状を排気管内壁に沿う円筒状と
して、排気管の有効内径の縮小を極力抑えることによっ
て背圧の上昇を抑制し、かつ金網又はパンチングメタル
(孔を有する金属製板)を担体として使用することによ
って、排気ガスと接触する触媒の表面積を増大させて、
排気ガス浄化能を改善させうろことを見出した。金網は
、線径0.1m以上、目開きの間隔が10mm以下であ
れば使用可能であり、またパンチングメタルについては
、空孔の形状は問わないが、円形の空孔の場合、直径1
0mm以下で、15mmピッチ以下であれば良く、その
板厚は強度及び加工性の点から、0.05〜1.5叩で
あることが好ましい。The present inventors made the catalyst shape cylindrical along the inner wall of the exhaust pipe to suppress the reduction in the effective inner diameter of the exhaust pipe as much as possible, thereby suppressing the increase in back pressure. plate) as a carrier to increase the surface area of the catalyst in contact with the exhaust gas,
We have discovered scales that improve exhaust gas purification ability. Wire mesh can be used as long as the wire diameter is 0.1 m or more and the gap between openings is 10 mm or less.For punched metal, the shape of the holes does not matter, but in the case of circular holes, the diameter is 1 m or less.
It is sufficient to have a pitch of 0 mm or less and a pitch of 15 mm or less, and the plate thickness is preferably 0.05 to 1.5 mm from the viewpoint of strength and workability.
金網およびパンチングメタルの材質は、触媒の耐久性に
とって重要な問題である。触媒は排気ガスの浄化時に高
温にさらされるため、通常の耐熱鋼やステンレス鋼では
耐久性が不充分である。それ故、本発明においては、担
体の素材として、A1及びCrを含有するフェライト系
ステンレス鋼が用いられる。AI!及びCrの含有量は
、それぞれ1〜10重量%及び5〜30重皿%が好まし
く、その他イツトリウム(Y)やセリウム(Ce)など
のような希土類元素を0.01〜1重皿%含有しても良
い。更に、本発明においては、上記フェライト系ステン
レス鋼索材を800〜1000℃範囲、好ましくは85
0〜970℃の範囲で焼成して、その表面にウィスカー
を形成する。このウィスカーは長さ1〜3μmであり、
これらの長さ、数は使用されるフェライト系ステンレス
の成分により若干の差異がある。The material of the wire mesh and punching metal is an important issue for the durability of the catalyst. Since catalysts are exposed to high temperatures when purifying exhaust gas, ordinary heat-resistant steel and stainless steel do not have sufficient durability. Therefore, in the present invention, ferritic stainless steel containing A1 and Cr is used as the material of the carrier. AI! The content of Cr and Cr is preferably 1 to 10% by weight and 5 to 30% by weight, respectively, and contains 0.01 to 1% by weight of other rare earth elements such as yttrium (Y) and cerium (Ce). It's okay. Further, in the present invention, the ferritic stainless steel cable material is heated to a temperature in the range of 800 to 1000°C, preferably 85°C.
It is fired at a temperature in the range of 0 to 970°C to form whiskers on its surface. This whisker has a length of 1 to 3 μm,
These lengths and numbers differ slightly depending on the composition of the ferritic stainless steel used.
触媒物質は主として貴金属及び無機金属酸化物から構成
される。貴金属としてはPt5Pd及びRhの少なくと
も1種が使用され、金網又はパンチングメタル100a
n’当り0.01〜1.5g、好ましくは0.1〜1.
5g付着される。また無機金属酸化物としては、アルミ
ナ、シリカ、ジルコニア等が挙げられるが、本発明にお
いては、γ、δ又はθの結晶形をもつ活性アルミナが好
ましい。また、アルカリ土類金属又は希土類金属によっ
て安定化された活性アルミナの使用、さらにニッケル(
Ni)、鉄(Fe)、セリウム(Ce)、ランタン(L
a)、ジルコニウム(Zr)等の助触媒成分の添加によ
り、本発明の触媒の性能は向上する。これら無機金属酸
化物は金網又はパンチングメタル100c+++2当り
0.05〜2.Og付若される。The catalytic material is primarily composed of noble metals and inorganic metal oxides. At least one of Pt5Pd and Rh is used as the noble metal, and wire mesh or punching metal 100a
0.01-1.5 g per n', preferably 0.1-1.
5g is attached. Examples of inorganic metal oxides include alumina, silica, and zirconia, but in the present invention, activated alumina having a γ, δ, or θ crystal form is preferred. Also, the use of activated alumina stabilized by alkaline earth metals or rare earth metals, as well as nickel (
Ni), iron (Fe), cerium (Ce), lanthanum (L
a) The performance of the catalyst of the present invention is improved by the addition of co-catalyst components such as zirconium (Zr). These inorganic metal oxides are 0.05 to 2.0% per 100 c++2 of wire mesh or punching metal. Og attached young.
完成触媒は、通常、担体に無機金属酸化物のゾルまたは
無機金属酸化物を湿式粉砕して得られるコロイド状のス
ラリーを付着させた後、所定量の貴金属を付着させるこ
とによって調製される。The finished catalyst is usually prepared by depositing a sol of an inorganic metal oxide or a colloidal slurry obtained by wet milling of an inorganic metal oxide on a support, followed by depositing a predetermined amount of the noble metal.
触媒の形状は、排気管内壁に沿うような型に種々成形さ
れるが、円筒状であることが好ましい。The catalyst may be formed into various shapes such as along the inner wall of the exhaust pipe, but a cylindrical shape is preferable.
金網又はパンチングメタルの面積は25〜10000a
n2であることが好ましいが、排気管内の断面積により
若干具なり、また触媒の厚さが薄い場合は、背圧が許す
かぎり、2重3重に巻き使用することができる。The area of wire mesh or punching metal is 25 to 10,000 a.
It is preferable that the catalyst be n2, but this will depend somewhat on the cross-sectional area of the exhaust pipe, and if the thickness of the catalyst is thin, it can be wound in double or triple layers as long as the back pressure allows.
この背圧は、触媒を直径33M1長さ50mmの円筒に
成形し、空気を2Nm’/min、の流量で流した場合
に、水柱で800mm (mmH2O)未満である。こ
れ以上の背圧を有する触媒をオートバイの排気管に設置
した場合、オートバイの通常の走行に支障を来たし、最
悪の時は走行が不能となることがある。This back pressure is less than 800 mm of water (mmH2O) when the catalyst is formed into a cylinder with a diameter of 33M and a length of 50 mm and air is flowed at a flow rate of 2 Nm'/min. If a catalyst with a back pressure greater than this is installed in the exhaust pipe of a motorcycle, it will interfere with the normal running of the motorcycle, and in the worst case scenario, it may become impossible to drive.
また、金網又はパンチングメタルを所定の形状に成型し
た場合の断面に対する開口率は87%以上であり、これ
未満である場合は、上記同様オートバイの走行に支障を
生じるものである。Further, when the wire mesh or punched metal is molded into a predetermined shape, the aperture ratio with respect to the cross section is 87% or more, and if it is less than this, it will cause problems in running the motorcycle as described above.
(実 施 例)
次に実施例により本発明をさらに詳細に説明するが、本
発明はこれら実施例のみに限定されるものでないことは
言うまでもない。(Examples) Next, the present invention will be explained in more detail with reference to Examples, but it goes without saying that the present invention is not limited only to these Examples.
実施例 1
アルミニウム含有フェライトステンレス(AICr :
Fe=5 : 2O : 75)型金網(2O0mmW
(幅)X2O0mmL(長さ)、22メツシユ(mes
h) 、線径O135mI11)を900℃で2時間空
気中で焼成し、ウィスカー状のアルミナを発生させた金
網を得た。Example 1 Aluminum-containing ferritic stainless steel (AICr:
Fe=5:2O:75) type wire mesh (2O0mmW
(Width)X2O0mmL (Length), 22 mesh
h) A wire mesh having a wire diameter of 0135 mI11) was fired at 900° C. for 2 hours in air to obtain a wire mesh in which whisker-like alumina was generated.
活性アルミナを湿式粉砕し、アルミナスラリー(固形分
濃度30%)を得、これに、ウィスカー状のアルミナ発
生金網を1分間浸漬した後、引き上げ余分のスラリーを
加圧空気により吹き飛ばし、次いで2O0℃で10時間
乾燥した後、600℃で2時間焼成しアルミナ被覆金網
を得た。Activated alumina was wet-pulverized to obtain an alumina slurry (solid content concentration 30%), a whisker-shaped alumina-generating wire mesh was immersed in this for 1 minute, and the excess slurry was blown off with pressurized air. After drying for 10 hours, it was fired at 600°C for 2 hours to obtain an alumina-coated wire mesh.
硝酸パラジウム溶液(Pd濃度100g/Iりに、アル
ミナ被覆金網を浸漬した後、余分の液を加圧空気により
吹き飛ばし、次いで2O0℃で10時間乾燥後、600
℃で2時間空気中で焼成して触媒を得た。After immersing the alumina-coated wire mesh in a palladium nitrate solution (Pd concentration 100 g/I), the excess liquid was blown off with pressurized air, and then dried at 200°C for 10 hours,
The catalyst was obtained by calcining in air at ℃ for 2 hours.
この触媒には、アルミナが2.49g、パラジウムが2
.02 g担持されていた。This catalyst contains 2.49g of alumina and 2.49g of palladium.
.. 02 g was supported.
実施例 2
直径2閣、ピッチ3 mmの孔を有する実施例1と同様
のアルミニウム含有フェライト系テンレス製のパンチン
グメタル(2O0mmWX 2O0mmL XO,7m
m厚さ(T))を900℃,2時間空気中で焼成し、ウ
ィスカー状のアルミナをパンチングメタル上に発生させ
た。Example 2 A punching metal made of aluminum-containing ferritic stainless steel similar to Example 1 having holes with a diameter of 2 mm and a pitch of 3 mm (200 mm W x 200 mm L
m thickness (T)) was fired in air at 900° C. for 2 hours to generate whisker-like alumina on the punched metal.
活性アルミナにPt及びPdを担持した粉体を湿式粉砕
し、得たスラリー(固形分濃度35%)に、ウィスカー
を発生させたパンチングメタルを1分間浸漬した後引き
上げ、余分のスラリーを加圧空気により吹き飛ばした。Powder containing Pt and Pd supported on activated alumina is wet-pulverized. A punched metal with whiskers is immersed in the resulting slurry (solid content concentration 35%) for 1 minute, then pulled out, and the excess slurry is blown with pressurized air. It was blown away.
次いで、2O0℃で10時間乾燥、600℃で2時間焼
成して触媒を得た。Next, the catalyst was dried at 200°C for 10 hours and calcined at 600°C for 2 hours.
この触媒には、アルミナ1.64g、Pt1.06g、
Pd0.53gが担持されていた。This catalyst contains 1.64 g of alumina, 1.06 g of Pt,
0.53 g of Pd was supported.
比較例 1
実施例1において、アルミニウム含有フェライトステン
レス製金網の代わりに、サス304(SUS 304)
製金網を使用し、かつウィスカー状のアルミナ発生処理
を除いた以外は実施例1と同様にして触媒を得た。Comparative Example 1 In Example 1, suspension 304 (SUS 304) was used instead of the aluminum-containing ferrite stainless steel wire mesh.
A catalyst was obtained in the same manner as in Example 1, except that a wire mesh was used and the whisker-like alumina generation treatment was omitted.
この触媒にはアルミナが2.07g、Pdが2.01g
担持されていた。This catalyst contains 2.07g of alumina and 2.01g of Pd.
It was being carried.
この触媒には、アルミナが2.92g、Ptが0.96
g5Pdが0.48 g担持されていた。This catalyst contains 2.92 g of alumina and 0.96 g of Pt.
0.48 g of g5Pd was supported.
実施例 3
実施例1及び2並びに比較例1及び2において得られた
触媒を100mmWX 100mmLに切断し、その重
量を測定し、次いで、超音波洗浄機に純水を張り、各々
の触媒を浸し、2O分間超音波処理を施した後引き上げ
、2O0℃で5時間乾燥し重量を測定し、触媒物質の剥
離ユを求めた。その結果を表mm、に示した。Example 3 The catalysts obtained in Examples 1 and 2 and Comparative Examples 1 and 2 were cut into 100 mmW x 100 mmL pieces, their weight was measured, and then an ultrasonic cleaner was filled with pure water to soak each catalyst. After being subjected to ultrasonic treatment for 20 minutes, it was pulled up, dried at 200° C. for 5 hours, and its weight was measured to determine the amount of peeling of the catalyst material. The results are shown in Table mm.
表
比較例 2
実施例2においてアルミニウム含有フェライトステンレ
ス製のパンチングメタルの代わりに、5US304製の
パンチングメタルを使用し、ウィスカー状のアルミナ発
生処理を除いた以外は、実施例2と同様にして触媒を得
た。Table Comparative Example 2 A catalyst was prepared in the same manner as in Example 2, except that a punching metal made of 5US304 was used instead of the aluminum-containing ferrite stainless steel punching metal in Example 2, and the whisker-like alumina generation treatment was omitted. Obtained.
実施例 4
実施例1及び2並びに比較例1及び2で調製した触媒を
各々直径33 mm X 100 mm Lの円筒に加
工して、市販の排気ffi 50 ccのオートバイの
排気管の内壁にそって挿入し、スポット溶接によりエン
ジンから2O0闘の位置に固定した。各々の触媒につい
て、5000k111の走行を行なった後、走行条件を
エコノミツク・コミッション・フォア・ヨーロッパ(E
CE)40モードに設定し、炭化水素(HC)、−酸化
炭素(CO)の浄化率を求めた。その結果を表−2に示
した。Example 4 Each of the catalysts prepared in Examples 1 and 2 and Comparative Examples 1 and 2 was processed into a cylinder with a diameter of 33 mm x 100 mm L, and was placed along the inner wall of the exhaust pipe of a commercially available FFI 50 cc motorcycle. Insert it and fix it at the 200 position from the engine by spot welding. After running 5000k111 for each catalyst, the running conditions were determined by the Economic Commission for Europe (Economics Commission for Europe).
CE)40 mode was set, and the purification rate of hydrocarbons (HC) and -carbon oxides (CO) was determined. The results are shown in Table-2.
表
実施例 5
実施例1及び2で調製した触媒の一部(実施例1の触媒
は100mmWX 100mmL、実施例2の触媒は1
00mmWX 50mmL)を、直径33n+m。Table Example 5 Some of the catalysts prepared in Examples 1 and 2 (the catalyst of Example 1 was 100 mmW x 100 mmL, the catalyst of Example 2 was 1
00mmWX 50mmL), diameter 33n+m.
長さ50皿の円筒状に積巻成形し、これを外接する配管
に入れた。又、比較例3で調製した触媒も同様に配管に
入れ、空気を2Nm’/min流し背圧を測定した。そ
の結果を表−3に示した。It was rolled and formed into a cylindrical shape with a length of 50 plates, and this was placed in a circumscribing pipe. Further, the catalyst prepared in Comparative Example 3 was similarly placed in the pipe, air was flowed at 2 Nm'/min, and the back pressure was measured. The results are shown in Table-3.
比較例 3
コージェライト質のハニカム担体(直径33mmX 5
0mmL、 400セル/in’、壁厚6−、ル(イン
チ/1000))約43ccを、予めpt及びPdを担
持した活性アルミナのスラリー中(固形分濃度、37%
)に、1分間浸漬した後引き上げて、余分なスラリーを
加圧空気にて吹き飛ばした。次いで12O℃の熱風で5
分間通風乾燥し、乾燥器中で2O0℃で10時間乾燥後
、600℃で2時間焼成して完成触媒を得た。Comparative Example 3 Cordierite honeycomb carrier (diameter 33 mm x 5
Approximately 43 cc (0 mm L, 400 cells/in', wall thickness 6-1000 cells/in') of activated alumina preloaded with PT and Pd (solids concentration, 37%
) for 1 minute, then pulled out, and excess slurry was blown off with pressurized air. Then, heat it with hot air at 12O℃ for 5 minutes.
The mixture was air-dried for 1 minute, dried in a dryer at 200°C for 10 hours, and then calcined at 600°C for 2 hours to obtain a finished catalyst.
この時の触媒物質の全担持はは、52Ogあった。うち
、Pt及びPdは各々0.49 g及び0.24g担持
されていた。得られた触媒について、実施例5と同様に
背圧を測定し、結果を表−3に示した。The total amount of catalyst material supported at this time was 52 Og. Of these, 0.49 g and 0.24 g of Pt and Pd were supported, respectively. The back pressure of the obtained catalyst was measured in the same manner as in Example 5, and the results are shown in Table 3.
表 3
(発明の効果)
表−2から明らかなように、本発明による実施例1及び
2の触媒は比較例1及び2の触媒と比較して、優れた排
気ガス浄化性能を示すことがわかる。Table 3 (Effects of the Invention) As is clear from Table 2, the catalysts of Examples 1 and 2 according to the present invention exhibit superior exhaust gas purification performance compared to the catalysts of Comparative Examples 1 and 2. .
浄化性能に劣る比較例1及び2の触媒を取り出して分析
したところ、金属担体自体の損傷が激しく、しかも、付
着された触媒物質の剥離が進行していたのに対し、実施
例1及び2の触媒は金属担体及び触媒物質の付着状態に
初期からの変化がほとんど見られなかった。When the catalysts of Comparative Examples 1 and 2, which had poor purification performance, were taken out and analyzed, it was found that the metal carriers themselves were severely damaged, and the attached catalyst material was peeling off, whereas the catalysts of Examples 1 and 2 Almost no changes were observed in the state of adhesion of the metal carrier and catalyst substance from the initial state of the catalyst.
また、触媒物質の付着強度については実施例3の剥離テ
ストから、また、背圧については実施例5のテストから
、いずれも本発明が優れた効果を示すことがわかる。Further, it can be seen from the peel test of Example 3 regarding the adhesion strength of the catalyst substance, and from the test of Example 5 regarding the back pressure that the present invention exhibits excellent effects.
以上より、本発明の触媒は、オートバイの排気ガス浄化
用触媒として、その浄化性能、金属担体の安定性及び触
媒物質の付、管強度において、実使用に問題のない耐久
性を有していることが明らかである。From the above, the catalyst of the present invention has sufficient durability for practical use as a catalyst for purifying motorcycle exhaust gas in terms of purification performance, stability of the metal carrier, adhesion of the catalyst material, and tube strength. That is clear.
Claims (1)
〜30重量%のクロム(Cr)を含有するフェライト系
ステンレス鋼素材の表面にウィスカー状のアルミナが形
成されている円筒状の金網またはパンチングメタルを担
体として、該担体の表面上に触媒物質を付着し、排気管
内に設置可能であることを特徴とするオートバイの排気
ガス浄化用触媒。 2、フェライト系ステンレス鋼素材を焼成温度800〜
1000℃の範囲で焼成し、長さ1〜3μmのウィスカ
ー状のアルミナを形成させる請求項(1)記載の触媒。 3、焼成温度が850〜970℃の範囲である請求項(
2)記載の触媒。 4、触媒物質が白金(Pt)、パラジウム(Pd)及び
ロジウム(Rh)からなる群から選ばれた少なくとも1
種の貴金属と無機金属酸化物とからなる請求項(1)記
載の触媒。 5、フェライト系ステンレス鋼素材が、金網又はパンチ
ングメタルの形をしてなる請求項 (1)記載の触媒。 6、金網の線径0.1mm以上、目開きの間隔10mm
以下であり、かつ該金網100cm^2当り貴金属が0
.01〜1.5g、無機金属酸化物が0.05〜2.0
g付着されてなる請求項(1)、(4)または(5)記
載の触媒。 7、パンチングメタルの厚さ0.05〜1.5mm、パ
ンチング穴径10mm以下、ピッチ15mm以下であり
、かつ該パンチングメタル100cm^2当り貴金属が
0.01〜1.5g担持、無機金属酸化物が0.05〜
2.0g付着されてなる請求項(1)、(4)または(
5)記載の触媒。 8、金網又はパンチングメタルの面積が25〜1000
0cm^2である請求項(1)、(4)、(5)、(6
)又は(7)記載の触媒。 9、金網又はパンチングメタルを直径33mm、長さ5
0mmの円筒に成形し、これに空気2Nm^3/(分)
minを流したときの背圧が800mmH_2O未満で
ある請求項(1)、(5)、(6)、(7)又は(8)
記載の触媒。 10、金網又はパンチングメタルを円筒状に成形したと
きの開口率が87%以上である請求項(1)、(5)、
(6)、(7)、(8)又は(9)記載の触媒。[Claims] 1. 0.5 to 10% by weight of aluminum (Al); and 5
Using a cylindrical wire mesh or punched metal as a carrier, on which whisker-like alumina is formed on the surface of a ferritic stainless steel material containing ~30% by weight of chromium (Cr), a catalyst substance is attached onto the surface of the carrier. A catalyst for purifying motorcycle exhaust gas, which is characterized in that it can be installed in an exhaust pipe. 2. Firing the ferritic stainless steel material at a temperature of 800~
The catalyst according to claim 1, wherein the catalyst is calcined at a temperature of 1000°C to form whisker-like alumina having a length of 1 to 3 μm. 3. Claim in which the firing temperature is in the range of 850 to 970°C (
2) The catalyst described. 4. The catalyst material is at least one selected from the group consisting of platinum (Pt), palladium (Pd), and rhodium (Rh).
The catalyst according to claim 1, comprising a noble metal and an inorganic metal oxide. 5. The catalyst according to claim 1, wherein the ferritic stainless steel material is in the form of a wire mesh or punched metal. 6. Wire mesh wire diameter 0.1mm or more, opening interval 10mm
or less, and the precious metal content per 100cm^2 of the wire mesh is 0.
.. 01-1.5g, inorganic metal oxide 0.05-2.0g
The catalyst according to claim (1), (4) or (5), wherein g is attached. 7. The thickness of the punching metal is 0.05 to 1.5 mm, the punching hole diameter is 10 mm or less, and the pitch is 15 mm or less, and 0.01 to 1.5 g of noble metal is supported per 100 cm^2 of the punching metal, and inorganic metal oxide. is 0.05~
Claim (1), (4) or (
5) Catalyst as described. 8. The area of wire mesh or punching metal is 25 to 1000
Claims (1), (4), (5), (6
) or the catalyst described in (7). 9. Wire mesh or punching metal with a diameter of 33 mm and a length of 5
Form into a 0mm cylinder and fill it with air at 2Nm^3/(min)
Claim (1), (5), (6), (7) or (8), wherein the back pressure when flowing min is less than 800 mmH_2O.
Catalysts as described. 10. Claims (1), (5), wherein the wire mesh or punched metal has an aperture ratio of 87% or more when formed into a cylindrical shape.
The catalyst described in (6), (7), (8) or (9).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1296241A JPH03157143A (en) | 1989-11-16 | 1989-11-16 | Catalyst for purification of exhaust gas from motorcycle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1296241A JPH03157143A (en) | 1989-11-16 | 1989-11-16 | Catalyst for purification of exhaust gas from motorcycle |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03157143A true JPH03157143A (en) | 1991-07-05 |
Family
ID=17831015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1296241A Pending JPH03157143A (en) | 1989-11-16 | 1989-11-16 | Catalyst for purification of exhaust gas from motorcycle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03157143A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6596243B1 (en) | 1996-06-20 | 2003-07-22 | Honda Giken Kogyo Kabushiki Kaisha | Catalyst element for purifying exhaust gases from internal combustion engine |
US6875408B1 (en) | 1999-11-19 | 2005-04-05 | Suzuki Motor Corporation | Exhaust gas purification catalyst for internal combustion |
JP2007515260A (en) * | 2003-09-26 | 2007-06-14 | ナムローゼ・フェンノートシャップ・ベーカート・ソシエテ・アノニム | Catalytic converter and method for producing the same |
WO2011132741A1 (en) * | 2010-04-23 | 2011-10-27 | ニチダイフィルタ株式会社 | Production method for ozone gas reduction catalyst support and catalyst support |
-
1989
- 1989-11-16 JP JP1296241A patent/JPH03157143A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6596243B1 (en) | 1996-06-20 | 2003-07-22 | Honda Giken Kogyo Kabushiki Kaisha | Catalyst element for purifying exhaust gases from internal combustion engine |
US6875408B1 (en) | 1999-11-19 | 2005-04-05 | Suzuki Motor Corporation | Exhaust gas purification catalyst for internal combustion |
JP2007515260A (en) * | 2003-09-26 | 2007-06-14 | ナムローゼ・フェンノートシャップ・ベーカート・ソシエテ・アノニム | Catalytic converter and method for producing the same |
WO2011132741A1 (en) * | 2010-04-23 | 2011-10-27 | ニチダイフィルタ株式会社 | Production method for ozone gas reduction catalyst support and catalyst support |
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