JPS60225651A - Monolithic catalyst for purifying exhaust gas of car - Google Patents
Monolithic catalyst for purifying exhaust gas of carInfo
- Publication number
- JPS60225651A JPS60225651A JP59082317A JP8231784A JPS60225651A JP S60225651 A JPS60225651 A JP S60225651A JP 59082317 A JP59082317 A JP 59082317A JP 8231784 A JP8231784 A JP 8231784A JP S60225651 A JPS60225651 A JP S60225651A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- exhaust gas
- monolithic
- cells
- inlet side
- 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 57
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 230000003197 catalytic effect Effects 0.000 claims abstract description 10
- 238000000746 purification Methods 0.000 claims abstract description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052697 platinum Inorganic materials 0.000 abstract description 3
- 229910052703 rhodium Inorganic materials 0.000 abstract description 3
- 239000010948 rhodium Substances 0.000 abstract description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 23
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000002002 slurry Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- IXSUHTFXKKBBJP-UHFFFAOYSA-L azanide;platinum(2+);dinitrite Chemical compound [NH2-].[NH2-].[Pt+2].[O-]N=O.[O-]N=O IXSUHTFXKKBBJP-UHFFFAOYSA-L 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- VXNYVYJABGOSBX-UHFFFAOYSA-N rhodium(3+);trinitrate Chemical compound [Rh+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VXNYVYJABGOSBX-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2825—Ceramics
- F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/06—Ceramic, e.g. monoliths
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ceramic Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Catalysts (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は自動車の排気ガス中に含まれる炭化水素（Ｉ（
Ｃ）、−酸化炭素（Ｃｏ） 、窒素酸化物（ＮＯｘ）等
の有害物質を除去するための自動車排気ガス浄化用モノ
リス触媒に関する。[Detailed Description of the Invention] [Technical Field] The present invention relates to hydrocarbons (I) contained in automobile exhaust gas.
C) -Relating to a monolithic catalyst for purifying automobile exhaust gas for removing harmful substances such as carbon oxide (Co) and nitrogen oxides (NOx).
モノリス触媒は排気ガスの流れ方向に沿って多数のセル
（細孔）が設けられた一体成形構造のモノリス担体に、
活性アルミナをコーティングした後、触媒作用のある活
性成分（通常は貴金属）を担持したものである。このモ
ノリス触媒は、粒状触媒に比べ熱容量が小さく、暖機性
に優れ、更に背圧が小さいという利点を有し、このため
自動車排気ガス浄化用触媒として広く利用されている。A monolithic catalyst is a monolithic carrier with an integrally molded structure that has numerous cells (pores) arranged along the flow direction of exhaust gas.
It is coated with activated alumina and then loaded with a catalytically active component (usually a noble metal). This monolithic catalyst has the advantage of having a smaller heat capacity than a granular catalyst, excellent warm-up performance, and low back pressure, and is therefore widely used as a catalyst for purifying automobile exhaust gas.
ところで、従来のモノリス触媒コンバータでは、モノリ
ス触媒を触媒コンバータ内に収納し保持しておくために
、モノリス触媒の両側面の外周部にリテーナを当てて固
定している。このため、リテーナと接する外周部のセル
は、その出入口が塞がれるため排気ガスが流れない。従
来のモノリス触媒では、すべての部分が触媒化されてい
るため、上記排気ガスが流れないセルに担持された触媒
は何等排気ガス浄化に寄与セず無駄になっている。By the way, in a conventional monolithic catalytic converter, in order to house and hold the monolithic catalyst within the catalytic converter, retainers are applied and fixed to the outer periphery of both sides of the monolithic catalyst. For this reason, exhaust gas does not flow through the cells on the outer periphery that are in contact with the retainer because their inlets and outlets are blocked. In a conventional monolithic catalyst, all parts are catalyzed, so the catalyst supported in the cells through which exhaust gas does not flow contributes nothing to exhaust gas purification and is wasted.
また、触媒コンバータ内の排気ガスの流れには流速分布
があり、中央部が多く流れ、外周部は流れが少ない。こ
のため、中央部の触媒成分がより大量の排気ガスにさら
されることになり、外周部に担持された触媒より早期に
劣化する。この結果、かかる中央部の劣化を考慮して触
媒仕様が決定されることになり、モノリス触媒全体が均
一に劣化する場合に比べ触媒仕様のグレードが高くなり
、モノリス触媒を高価なものとしている。Furthermore, the flow of exhaust gas in the catalytic converter has a flow velocity distribution, with more flow in the center and less flow in the outer periphery. For this reason, the catalyst component in the central portion is exposed to a larger amount of exhaust gas, and deteriorates earlier than the catalyst supported in the outer peripheral portion. As a result, catalyst specifications are determined taking such deterioration in the central portion into consideration, and the grade of the catalyst specifications is higher than in the case where the entire monolith catalyst deteriorates uniformly, making the monolith catalyst expensive.
本発明は、上記従来技術の問題を解決するためになされ
たもので、本発明の目的は、自動車排気ガス浄化用モノ
リス触媒のセルの大きさを部分的に変えることにより、
モノリス触媒全体の流速の均一化および最外端のセルの
有効活用を可能とし、もってモノリス触媒の浄化性能お
よび耐久性の向」二を図ることにある。The present invention has been made in order to solve the problems of the prior art described above, and an object of the present invention is to partially change the cell size of a monolithic catalyst for purifying automobile exhaust gas.
The object of this invention is to make it possible to equalize the flow rate throughout the monolith catalyst and to make effective use of the outermost cells, thereby improving the purification performance and durability of the monolith catalyst.
かかる目的は、本発明によれば、次の自動車排気ガス浄
化用モノリス触媒によって達成される。According to the present invention, this object is achieved by the following monolithic catalyst for purifying automobile exhaust gas.
即ち、本発明の自動車排気ガス浄化用モノリス触媒は、
柱状をなし、内部に排気ガスの入口側から出口側に向け
て多数のセルを有するモノリス担体に触媒成分が担持さ
れたものであり、触媒コンバータに装着されリテーナに
よって軸方向を支持される自動車排気ガス浄化用モノリ
ス触媒であって、
このモノリス触媒の少なくとも排気ガス入口側は、半径
方向で外周端から中心に向かってモノリス触媒半径の２
／３未満で、かつ軸方向で入口側から出口側に向けてモ
ノリス触媒長さの１／２未満の部分のセル数が、その他
の部分のセル数の１／２以下にされていると共に、入口
側と出口側の最外周部のセルは前記リテーナにより出入
口が塞がれない大きさとされていることを特徴としてい
る。That is, the monolithic catalyst for automobile exhaust gas purification of the present invention is
Automobile exhaust gas is a columnar monolithic carrier that has catalyst components supported on a monolithic carrier that has a large number of cells inside from the exhaust gas inlet side to the exhaust gas outlet side, and is attached to a catalytic converter and supported in the axial direction by a retainer. A monolithic catalyst for gas purification, at least on the exhaust gas inlet side of the monolithic catalyst, which has a diameter of 2 times the radius of the monolithic catalyst from the outer peripheral end toward the center in the radial direction.
/3, and the number of cells in a portion less than 1/2 of the length of the monolith catalyst from the inlet side to the outlet side in the axial direction is 1/2 or less of the number of cells in the other portions, and, The outermost cells on the inlet and outlet sides are characterized in that they are sized so that the inlet and outlet are not blocked by the retainer.
本発明のモノリス触媒において、セル数が１／２以下と
される部分は、半径方向で外周端から中心に向かってモ
ノリス触媒半径の２／３未満で、かつ軸方向で入口側か
ら出口側に向けてモノリス触媒長さの１７２未満の部分
であるが、半径方向で外周端から中心に向かってモノリ
ス触媒半径の１／２未満で、かつ軸方向で入口側から出
口側に向けてモノリス触媒長さの１／３未満の部分とす
るのがより望ましい。In the monolith catalyst of the present invention, the portion where the number of cells is 1/2 or less is less than 2/3 of the radius of the monolith catalyst from the outer peripheral end toward the center in the radial direction, and from the inlet side to the outlet side in the axial direction. It is less than 172 mm of the length of the monolith catalyst in the radial direction from the outer peripheral end to the center, and less than 1/2 of the monolith catalyst radius in the axial direction from the inlet side to the outlet side. It is more desirable that the area be less than 1/3 of the length.
このセル数を１／２以下とする個所は、モノリス触媒の
入口側であるが、出口側を入口側と同しようにしても良
い。The location where the number of cells is reduced to 1/2 or less is on the inlet side of the monolith catalyst, but the outlet side may be the same as the inlet side.
また、本発明において、モノリス触媒の入口側と出口側
の最外端のセルはモノリス触媒を保持しているリテーナ
より大径とされる。但し、軸方向の中央部は通當の大き
さとされる。Further, in the present invention, the outermost cells on the inlet side and the outlet side of the monolithic catalyst are made larger in diameter than the retainer holding the monolithic catalyst. However, the central portion in the axial direction is the same size as the current size.
本発明の自動車排気ガス浄化用モノリス触媒によれば、
半径方向で外周部のセルの径が中央部のセルの径より大
きい部分を有するため、断面中央部の圧力損失が外周部
より大きくなり、流速分布が従来より均一になる。According to the monolithic catalyst for purifying automobile exhaust gas of the present invention,
Since there is a portion in which the diameter of the cells at the outer circumference is larger than the diameter of the cells at the center in the radial direction, the pressure loss at the center of the cross section is greater than that at the outer circumference, and the flow velocity distribution becomes more uniform than before.
また、最外周端のセルの大きさをリテーナより大きくし
たため、最外周端のセルをも排気ガスが通過できるよう
になり、セル内に担持された触媒をすべて利用できる。Furthermore, since the size of the cells at the outermost edge is made larger than the size of the retainer, exhaust gas can also pass through the cells at the outermost edge, allowing all of the catalyst supported within the cells to be utilized.
以上より、本発明の自動車排気ガス浄化用モノリス触媒
によれば、中央部と外周部における流速分布が均一にな
り、かつすべての触媒を利用できるようになるため、触
媒の浄化性能が大幅に向上すると共に、触媒の耐久性も
向上する。As described above, according to the monolithic catalyst for purifying automobile exhaust gas of the present invention, the flow velocity distribution in the central part and the outer peripheral part becomes uniform, and all the catalysts can be used, so the purification performance of the catalyst is significantly improved. At the same time, the durability of the catalyst is also improved.
次に、本発明の実施例を図面を参考にして説明する。 Next, embodiments of the present invention will be described with reference to the drawings.
ここで、第１図は本発明の実施例に使用したモノリス担
体の概要を示す概略構成図、第２図は第１図のｎ−ｎ線
断面図、第３図は第２図のｍ−ｎｒ線断面図、第４図は
第２図のＴＶ−ＩＶ線断面図、第５図は第２図のｖ”ｖ
線断面図、第６図は本発明の実施例に係る自動車排気ガ
ス浄化用モノリス触媒を触媒コンバータに装着した状態
を示す断面図である。Here, FIG. 1 is a schematic configuration diagram showing an outline of a monolithic carrier used in an example of the present invention, FIG. 2 is a sectional view taken along line nn in FIG. 1, and FIG. NR line sectional view, Figure 4 is a TV-IV line sectional view in Figure 2, Figure 5 is v''v in Figure 2.
FIG. 6 is a cross-sectional view showing a state in which a monolithic catalyst for purifying automobile exhaust gas according to an embodiment of the present invention is installed in a catalytic converter.
第１図〜第５図に示すモノリス担体１を製作した。この
モノリス担体１は直径１０７ｍ１、長さ１１１璽１であ
り、第１図および第２図に示すように、排気ガスの入口
側２の部分において、入口端面から軸方向中心に向かっ
て３５＋＊で、かつ半径方向で外周端から中心に向かっ
て２６ＩＩｍの部分、および出口側３において、出口端
面から軸方向中心に向かって１０ｍｍで、かつ外周端か
ら中心に向かって３０ｍｍの部分のセル４の数を、１平
方インチ当り２００個とし、その他の部分のセル数を１
平方当り４００１［１ｉ１とした。なお、セル４の数を
１平方当り２００個とした部分を、第１図に説明の便宜
上ハツチングを付して示す。また、第２図に示すように
、入口側２と出口側３の外周端のセル４の径ｔ、はリテ
ーナ５の幅ｔ２より大きくした。A monolith carrier 1 shown in FIGS. 1 to 5 was manufactured. This monolith carrier 1 has a diameter of 107 m1 and a length of 111 mm, and as shown in Figs. , and the number of cells 4 in a portion of 26IIm from the outer peripheral end toward the center in the radial direction, and on the outlet side 3, a portion of 10 mm from the outlet end face toward the center in the axial direction and 30 mm from the outer peripheral end toward the center. is 200 cells per square inch, and the number of cells in other areas is 1.
4001 [1i1] per square. Note that a portion where the number of cells 4 is 200 per square is shown with hatching in FIG. 1 for convenience of explanation. Further, as shown in FIG. 2, the diameter t of the cells 4 at the outer peripheral ends of the inlet side 2 and the outlet side 3 was made larger than the width t2 of the retainer 5.
続いて、アルミナ含有量１０重量％（以下、％はずべて
重量％を示す）のアルミナシルア００ｇに、４０％硝酸
アルミニウム水溶液１５０ｇを加え、更に蒸留水４５０
ｍ７！を加えて撹拌し、混合懸濁液を得た。この中へア
ルミナ粉末１０００ｇを加え、撹拌してスラリーを調製
した。このスラリー中に上記モノリス担体ｌを１分間浸
漬し、引き上げて気流でセル内のスラリーを吹きとばし
た。Subsequently, 150 g of a 40% aluminum nitrate aqueous solution was added to 00 g of alumina silica with an alumina content of 10% by weight (hereinafter all percentages indicate weight%), and further 450 g of distilled water was added.
m7! was added and stirred to obtain a mixed suspension. 1000 g of alumina powder was added to this and stirred to prepare a slurry. The monolithic carrier I was immersed in this slurry for 1 minute, then pulled up and the slurry inside the cell was blown away with an air current.
その後、２００“Ｃで１時間乾燥し、続いて７００℃で
２時間焼成した。この結果、モノリス担体１の表面に活
性アルミナ層が形成された。Thereafter, it was dried at 200"C for 1 hour, and then fired at 700"C for 2 hours. As a result, an activated alumina layer was formed on the surface of the monolithic carrier 1.
次いで、このモノリス担体１を蒸留水に浸漬して十分吸
水させた後、引き上げて余分な水分を吹き払い、ジニト
ロジアンミン白金水溶液１．０ｇ／ｌに１時間浸漬した
。引き上げて余分な水分を吹きとばし、１２０℃で２時
間乾燥し、続いて７００℃で２時間焼成した。Next, this monolithic carrier 1 was immersed in distilled water to absorb sufficient water, then pulled out to blow off excess water, and immersed in a dinitrodiammine platinum aqueous solution of 1.0 g/l for 1 hour. It was pulled up and excess water was blown off, dried at 120°C for 2 hours, and then fired at 700°C for 2 hours.
続いて、硝酸ロジウム水溶液０．５ｇ／ｆｉに１時間浸
漬し、引き上げて上記と同様乾燥、焼成した。Subsequently, it was immersed in an aqueous rhodium nitrate solution of 0.5 g/fi for 1 hour, taken out, and dried and fired in the same manner as above.
この結果、白金とロジウムが担持されたモノリス触媒６
が得られた。As a result, a monolithic catalyst 6 on which platinum and rhodium were supported
was gotten.
（比較例）
直径１０７ｍｍ、長さ１１１ｍｍ、１平方インチ当り４
００個のセルを有するモノリス担体を用いたこと以外は
、実質的に実施例と同様にして白金とロジウムを担持し
た。(Comparative example) Diameter 107mm, length 111mm, 4 per square inch
Platinum and rhodium were supported in substantially the same manner as in the example except that a monolithic carrier having 00 cells was used.
（試験例）
上記実施例と比較例で得られたモノリス触媒を第６図に
示すように触媒コンバータ容器７に装着して触媒コンバ
ータとした後、以下の方法で耐久試験を実施し、浄化性
能を評価した。(Test Example) The monolithic catalysts obtained in the above Examples and Comparative Examples were installed in the catalytic converter container 7 as shown in FIG. was evaluated.
この耐久試験は、２．８１エンジンを用い、空燃比（Ａ
／Ｆ）： １６．０、空間速度（ＳＶ）、１６００００
ｈｒ、触媒床温度７００℃で運転し、２００時間後に浄
化率を測定した。なお、浄化率の測定は、排気ガス温度
が３００℃と３５０℃の各場合について、Ａ／Ｆ：１４
．６で行った。この結果を第１表に示す。This durability test used a 2.81 engine with an air-fuel ratio (A
/F): 16.0, space velocity (SV), 160000
The system was operated at a catalyst bed temperature of 700°C, and the purification rate was measured after 200 hours. The purification rate was measured at A/F: 14 for exhaust gas temperatures of 300°C and 350°C.
．． I went with 6. The results are shown in Table 1.
第１表 但し、浄化率はすべて％を示す。Table 1 However, all purification rates are shown in %.
第１表より明らかなように、本発明の実施例に係るモノ
リス触媒は、従来のモノリス触媒より高活性であること
が判る。As is clear from Table 1, it can be seen that the monolithic catalysts according to the examples of the present invention have higher activity than the conventional monolithic catalysts.
以上、本発明の特定の実施例について説明したが、本発
明は、この実施例に限定されるものではなく、特許請求
の範囲に記載の範囲内で種々の実施態様が包含されるも
のである。Although specific embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and includes various embodiments within the scope of the claims. .
第１図は本発明の実施例に使用したモノリス担体の概要
を示す概略構成図、
第２図は第１図のｎ−ｎ線断面図、
第３図は第２図のｍ−ｍ線断面図、
第４図は第２図のＩＶ−ＩＶ線断面図、第５図は第２図
のｖ−ｖ線断面図、
第６図は本発明の実施例に係る自動車排気ガス浄化用モ
ノリス触媒を触媒コンバータに装着した状態を示す断面
図である。
１−−−−−−モノリス担体
２−−−−−人口側
０
３−−−−一出口側
４−−−−−セル
５−−−−リテーナ
６−−−−−モノリス触媒
７−−−触媒コンバータ容器
１
第１図
第２図Fig. 1 is a schematic configuration diagram showing the outline of the monolith carrier used in the examples of the present invention, Fig. 2 is a cross-sectional view taken along line nn in Fig. 1, and Fig. 3 is a cross-sectional view taken along line m-m in Fig. 2. Figure 4 is a sectional view taken along line IV-IV in Figure 2, Figure 5 is a sectional view taken along line v-v in Figure 2, and Figure 6 is a monolithic catalyst for purifying automobile exhaust gas according to an embodiment of the present invention. FIG. 3 is a sectional view showing a state in which the catalytic converter is attached to a catalytic converter. 1-------Monolith carrier 2----Population side 0 3------One outlet side 4----Cell 5----Retainer 6----Monolith catalyst 7--- -Catalytic converter container 1 Figure 1 Figure 2
Claims (1)
に向けて多数のセルを有するモノリス担体に触媒成分が
担持されたものであり、触媒コンバータに装着されリテ
ーナによって軸方向を支持される自動車排気ガス浄化用
モノリス触媒であって、このモノリス触媒の少なくとも
排気ガス入口側は、半径方向で外周端から中心に向かっ
てモノリス触媒半径の２７３未満で、かつ軸方向で入口
側から出口側に向けてモノリス触媒長さの１／２未満の
部分のセル数が、その他の部分のセル数の１／２以下に
されていると共に、入口側と出口側の最外周部のセルは
前記リテーナにより出入口が塞がれない大きさとされて
いることを特徴とする自動車排気ガス浄化用モノリス触
媒。(A catalyst component is supported on a monolithic carrier that is shaped like 11 columns and has a large number of cells inside from the exhaust gas inlet side to the exhaust gas outlet side. It is attached to a catalytic converter and supported in the axial direction by a retainer. A monolithic catalyst for purifying automobile exhaust gas, wherein at least the exhaust gas inlet side of the monolithic catalyst is less than 273 of the radius of the monolith catalyst from the outer peripheral end toward the center in the radial direction, and from the inlet side to the outlet side in the axial direction. The number of cells in a portion less than 1/2 of the length of the monolith catalyst is set to 1/2 or less of the number of cells in other portions, and the outermost cells on the inlet and outlet sides are arranged by the retainer. A monolithic catalyst for automobile exhaust gas purification characterized by a size that does not block the entrance and exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59082317A JPS60225651A (en) | 1984-04-24 | 1984-04-24 | Monolithic catalyst for purifying exhaust gas of car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59082317A JPS60225651A (en) | 1984-04-24 | 1984-04-24 | Monolithic catalyst for purifying exhaust gas of car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60225651A true JPS60225651A (en) | 1985-11-09 |
Family
ID=13771184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59082317A Pending JPS60225651A (en) | 1984-04-24 | 1984-04-24 | Monolithic catalyst for purifying exhaust gas of car |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60225651A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1374971A1 (en) * | 2002-06-18 | 2004-01-02 | Toyota Jidosha Kabushiki Kaisha | Particulate filter for an internal combustion engine and method for producing the same |
| JP2013154278A (en) * | 2012-01-27 | 2013-08-15 | Denso Corp | Honeycomb structure |
| JP2015090139A (en) * | 2013-11-07 | 2015-05-11 | トヨタ自動車株式会社 | Catalytic converter |
| JP2015180491A (en) * | 2014-03-05 | 2015-10-15 | 株式会社デンソー | honeycomb structure |
| JP2018003811A (en) * | 2016-07-08 | 2018-01-11 | いすゞ自動車株式会社 | Oxidation catalyst and exhaust emission control system |
-
1984
- 1984-04-24 JP JP59082317A patent/JPS60225651A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1374971A1 (en) * | 2002-06-18 | 2004-01-02 | Toyota Jidosha Kabushiki Kaisha | Particulate filter for an internal combustion engine and method for producing the same |
| US7001442B2 (en) | 2002-06-18 | 2006-02-21 | Toyota Jidosha Kabushiki Kaisha | Particulate filter for an internal combustion engine and method for producing the same |
| JP2013154278A (en) * | 2012-01-27 | 2013-08-15 | Denso Corp | Honeycomb structure |
| JP2015090139A (en) * | 2013-11-07 | 2015-05-11 | トヨタ自動車株式会社 | Catalytic converter |
| JP2015180491A (en) * | 2014-03-05 | 2015-10-15 | 株式会社デンソー | honeycomb structure |
| JP2018003811A (en) * | 2016-07-08 | 2018-01-11 | いすゞ自動車株式会社 | Oxidation catalyst and exhaust emission control system |
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