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1. 发明申请

US20090084092A1 EXHAUST GAS PURIFYING CATALYST SYSTEM 审中-公开
标题翻译：排气净化催化剂体系
公开(公告)号：US20090084092A1
公开(公告)日：2009-04-02
申请号：US12243063
申请日：2008-10-01
申请人： Seiji MIYOSHI , Hideharu IWAKUNI , Koji MINOSHIMA , Akihide TAKAMI , Masahiko SHIGETSU
发明人： Seiji MIYOSHI , Hideharu IWAKUNI , Koji MINOSHIMA , Akihide TAKAMI , Masahiko SHIGETSU
IPC分类号： F01N3/10
CPC分类号： F01N3/10 , F01N13/009 , F01N2510/067 , F01N2570/16
摘要： Disclosed is an exhaust gas purifying catalyst system, which comprises an upstream catalyst disposed in an exhaust gas passage of an engine at a position on an upstream side with respect to a direction of an exhaust gas stream, and a downstream catalyst disposed in the exhaust gas passage at a position on a downstream side with respect to the direction of the exhaust gas stream. In the exhaust gas purifying catalyst system, the downstream catalyst includes a cerium (Ce)-containing rhodium-doped composite oxide and an Ni component, and the upstream catalyst includes a cerium (Ce)-containing composite oxide other than the rhodium-doped composite oxide, and a Ni component. A ratio of Ni to CeO2 in the upstream catalyst is in the range of 15 to 20 mass %, and a ratio of Ni to CeO2 in the downstream catalyst is in the range of 10 to 60 mass %. The exhaust gas purifying catalyst system of the present invention can reduce an amount of H2S emission while achieving high purification performance.
摘要翻译：公开了一种废气净化催化剂体系，其包括在排气流方向的上游侧的位置处配置在发动机的排气通路中的上游催化剂，以及配置在排气中的下游催化剂相对于废气流的方向在下游侧的位置处的通道。在排气净化催化剂体系中，下游催化剂包括含铈（Ce）的铑掺杂复合氧化物和Ni成分，上游催化剂包含除铑掺杂复合氧化物以外的含铈（Ce）氧化物和Ni组分。上游催化剂中的Ni与CeO 2的比例为15〜20质量％，下游催化剂中的Ni与CeO 2的比例为10〜60质量％。本发明的废气净化催化剂体系可以在实现高纯化性能的同时，减少H2S排放量。

2. 发明申请

US20110045968A1 EXHAUST GAS PURIFICATION CATALYST 有权
标题翻译：排气净化催化剂
公开(公告)号：US20110045968A1
公开(公告)日：2011-02-24
申请号：US12846486
申请日：2010-07-29
申请人： Masaaki AKAMINE , Hideharu IWAKUNI , Hisaya KAWABATA , Yasuhiro OCHI , Yuki MURAKAMI , Susumu MINEOI , Akihide TAKAMI , Masahiko SHIGETSU
发明人： Masaaki AKAMINE , Hideharu IWAKUNI , Hisaya KAWABATA , Yasuhiro OCHI , Yuki MURAKAMI , Susumu MINEOI , Akihide TAKAMI , Masahiko SHIGETSU
IPC分类号： B01J23/10
CPC分类号： B01J23/63 , B01D53/945 , B01D2255/1025 , B01D2255/2061 , B01D2255/2068 , B01D2255/407 , B01D2255/9022 , B01D2255/9202 , B01D2258/014 , B01J23/002 , B01J35/0006 , B01J35/0013 , B01J35/002 , B01J35/023 , B01J37/0036 , B01J37/0244 , B01J37/0248 , B01J2523/00 , Y02T10/22 , B01J2523/3712 , B01J2523/3725 , B01J2523/48 , B01J2523/822 , B01J2523/31 , B01J2523/3706
摘要： A catalyst layer includes: a first mixed oxide particle component 4 which contains Ce and Rh 8 and in which Rh is partially exposed at particle surfaces; and a second mixed oxide particle component 5 containing Ce, Zr, and a rare earth metal except Ce. The particle size distribution of the first mixed oxide particle component 4 has a peak in the particle size range from 100 nm to 300 nm, both inclusive. The particle size distribution of the second mixed oxide particle component 5 has a peak in a particle size range larger than the particle size range in which the first mixed oxide particle component 4 has the peak. At least part of particles of the first mixed oxide particle component 4 is attached to at least part of particles of the second mixed oxide particle component 5.
摘要翻译：催化剂层包括：含有Ce和Rh 8的第一混合氧化物颗粒组分4，其中Rh在颗粒表面部分暴露; 以及含有Ce，Zr和Ce以外的稀土金属的第二混合氧化物粒子成分5。第一混合氧化物粒子成分4的粒径分布在100nm〜300nm的粒径范围内具有峰值。第二混合氧化物粒子成分5的粒径分布具有比第一混合氧化物粒子成分4具有峰值的粒径范围大的粒度范围的峰。第一混合氧化物颗粒组分4的至少部分颗粒附着到第二混合氧化物颗粒组分5的至少一部分颗粒。

3. 发明申请

US20090298673A1 EXHAUST GAS PURIFICATION CATALYST 审中-公开
标题翻译：排气净化催化剂
公开(公告)号：US20090298673A1
公开(公告)日：2009-12-03
申请号：US12473918
申请日：2009-05-28
申请人： Masaaki AKAMINE , Masahiko SHIGETSU , Hirosuke SUMIDA , Tatsuto FUKUSHIMA , Seiji MIYOSHI , Hiroshi YAMADA , Hideharu IWAKUNI , Koichiro HARADA
发明人： Masaaki AKAMINE , Masahiko SHIGETSU , Hirosuke SUMIDA , Tatsuto FUKUSHIMA , Seiji MIYOSHI , Hiroshi YAMADA , Hideharu IWAKUNI , Koichiro HARADA
IPC分类号： B01J29/072 , B01J23/10
CPC分类号： B01D53/945 , B01D2251/2062 , B01D2251/2067 , B01D2255/1021 , B01D2255/1025 , B01D2255/206 , B01D2255/20715 , B01D2255/20738 , B01D2255/2092 , B01D2255/407 , B01D2255/50 , B01D2255/908 , B01D2255/91 , B01D2255/9202 , B01D2258/012 , B01D2258/014 , B01J21/066 , B01J23/83 , B01J23/894 , B01J29/06 , B01J29/7007 , B01J37/0215 , Y02T10/22
摘要： An exhaust gas purification catalyst includes a catalyst layer formed on a support. The catalyst layer contains Ce-containing oxide particles having an oxygen storage/release capacity and a catalytic metal. The catalyst layer further contains a large number of iron oxide particles of 300 nm diameter or less that are dispersed therein and are in contact with the Ce-containing oxide particles. When observed by electron microscopy, the proportion of the area of iron oxide particles of 300 nm diameter or less to the total area of all of iron oxide particles in the catalyst layer is 30% or more.
摘要翻译：废气净化催化剂包括形成在载体上的催化剂层。催化剂层含有具有储氧/释放能力的含Ce氧化物颗粒和催化金属。催化剂层还含有分散在其中并与含Ce氧化物颗粒接触的300nm直径或更小的大量氧化铁颗粒。当通过电子显微镜观察时，催化剂层中氧化铁颗粒的总面积与直径在300nm以下的氧化铁颗粒的面积的比例为30％以上。

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