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公开(公告)号:US4849398A
公开(公告)日:1989-07-18
申请号:US82533
申请日:1987-08-07
CPC分类号: B01D53/945 , B01J23/58 , B01J23/63 , B01J37/024 , Y02T10/22 , Y10S502/525
摘要: A catalyst for purifying exhaust gases contains: a catalyst support, a perovskite double oxide comprising at least one alkaline earth metal oxide, lathanum oxide and cerium oxide, carried on the catalyst support, and noble metal catalyst components carried on the catalyst support.The catalyst for purifying exhaust gases according to the present invention offers an improved durability and purifying ratios for carbon monoxide CO, hydrocarbons HC and nitrogen oxides NOx.
摘要翻译: 用于净化废气的催化剂包含:载体在催化剂载体上的催化剂载体,包含至少一种碱土金属氧化物,氧化铟和氧化铈的钙钛矿双氧化物和载于催化剂载体上的贵金属催化剂组分。 根据本发明的用于净化废气的催化剂提供一氧化碳CO,烃HC和氮氧化物NOx的改进的耐久性和净化比。
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公开(公告)号:US6159897A
公开(公告)日:2000-12-12
申请号:US201124
申请日:1998-11-30
申请人: Hiromasa Suzuki , Shinichi Matsumoto , Naoto Miyoshi , Kazunobu Ishibashi , Koichi Kasahara , Syuji Tateishi , Daisuke Suzuki
发明人: Hiromasa Suzuki , Shinichi Matsumoto , Naoto Miyoshi , Kazunobu Ishibashi , Koichi Kasahara , Syuji Tateishi , Daisuke Suzuki
IPC分类号: B01D53/86 , B01D53/94 , B01J21/06 , B01J23/40 , B01J23/42 , B01J23/58 , B01J23/63 , B01J21/12 , B01J23/02 , B01J23/10
CPC分类号: B01D53/945 , B01D53/9422 , B01D2255/1021 , B01D2255/1025 , B01D2255/2022 , B01D2255/2027 , B01D2255/2042 , B01D2255/2061 , B01D2255/2063 , B01D2255/2065 , B01D2255/91 , B01J21/063 , B01J21/066 , B01J23/58 , B01J23/63 , Y02T10/22
摘要: A catalyst for purifying exhaust gases includes a support including at le one composite selected from the group consisting of TiO.sub.2 --Al.sub.2 O.sub.3, ZrO.sub.2 --Al.sub.2 O.sub.3 and SiO.sub.2 --Al.sub.2 O.sub.3 composites, an NO.sub.x adsorbent including at least one member selected from the group consisting of alkali metals, alkaline-earth metals and rare-earth elements and loaded on the support, and a noble metal catalyst ingredient loaded on the support. The composites constituting the support improve initial NO.sub.x conversion of the catalyst, but also inhibit NO.sub.x purifying performance thereof from degrading even after a durability test.
摘要翻译: 一种用于净化废气的催化剂包括包含至少一种选自TiO 2 -Al 2 O 3,ZrO 2 -Al 2 O 3和SiO 2 -Al 2 O 3复合材料的复合材料的载体,包括选自碱金属, 碱土金属和稀土元素并负载在载体上,贵金属催化剂成分装载在载体上。 构成载体的复合体能够提高催化剂的初始NOx转化率,而且即使在耐久性试验后也能够抑制NOx净化性能的劣化。
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公开(公告)号:US4927799A
公开(公告)日:1990-05-22
申请号:US290421
申请日:1988-12-27
申请人: Shinichi Matsumoto , Naoto Miyoshi , Mareo Kimura , Masakuni Ozawa , Akio Isogai
发明人: Shinichi Matsumoto , Naoto Miyoshi , Mareo Kimura , Masakuni Ozawa , Akio Isogai
CPC分类号: B01D53/945 , B01J23/10 , B01J23/63 , B01J23/83 , Y02T10/22
摘要: A catalyst for the purification of exhaust gases comprising a catalyst carrier layer and catalyst ingredients carried thereon, is capable of enhancing the purification property by suppressing the growth of cerium oxide particles and preventing the formation of LaAlO.sub.3. This catalyst has two composition types. One is a binary composition catalyst comprising oxides of cerium and zirconium in the catalyst carrier layer and the other is a ternary composition catalyst comprising oxides of cerium, zirconium and lanthanum in the catalyst carrier layer.
摘要翻译: 用于净化废气的催化剂,其包含催化剂载体层和在其上承载的催化剂成分,能够通过抑制氧化铈颗粒的生长并防止LaAlO 3的形成来提高净化性能。 该催化剂具有两种组成类型。 一种是在催化剂载体层中包含铈和锆的氧化物的二元组合物催化剂,另一种是在催化剂载体层中包含铈,锆和镧的氧化物的三元组成催化剂。
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公开(公告)号:US4843056A
公开(公告)日:1989-06-27
申请号:US164237
申请日:1988-03-04
申请人: Shinichi Matsumoto , Naoto Miyoshi , Hideaki Muraki , Hideo Sobukawa , Masayuki Fukui , Mareo Kimura , Hirofumi Shinjoh
发明人: Shinichi Matsumoto , Naoto Miyoshi , Hideaki Muraki , Hideo Sobukawa , Masayuki Fukui , Mareo Kimura , Hirofumi Shinjoh
CPC分类号: B01D53/945 , B01J23/63 , Y02T10/22
摘要: An exhaust gas purifying catalyst for oxidizing HC and CO and for reducing NOx is provided, which comprises at least one oxide of rare earth element, rhodium, and at least one of platinum and palladium loaded on alumina grains. The major amount of rhodium is dispersed on the oxide of rare earth element. Thus, the rhodium solidification into the alumina grains is prevented. Further, when cerium oxide accompanying lanthanum oxide, neodymium oxide or a mixture thereof is used as the oxide of rare earth element, the sintering of cerium oxide or palladium at a high temperature is suppressed since it forms a complex oxide with lanthanum oxide, neodymium oxide or a mixture thereof. Additionally, when stabilized alumina grains in which a rare earth element and an alkali earth element are present in a solid solution state are used, the deterioration of NOx purifying activity of the catalyst at a high temperature is suppressed. The exhaust gas purifying catalyst of this invention has high durability as well as high activity at a high temperature.
摘要翻译: 提供一种用于氧化HC和CO并用于还原NOx的废气净化催化剂,其包含至少一种稀土元素氧化物,铑,以及负载在氧化铝颗粒上的铂和钯中的至少一种。 铑的主要量分散在稀土元素的氧化物上。 因此,防止了铑固化成氧化铝颗粒。 此外,当使用伴随氧化镧,氧化钕或其混合物的氧化铈作为稀土元素的氧化物时,氧化铈或钯在高温下的烧结被抑制,因为它与氧化镧,氧化钕形成复合氧化物 或其混合物。 此外,当使用其中以固溶状态存在稀土元素和碱土金属元素的稳定的氧化铝颗粒时,抑制了催化剂在高温下的NOx净化活性的劣化。 本发明的废气净化催化剂在高温下具有高耐久性和高活性。
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公开(公告)号:US5911960A
公开(公告)日:1999-06-15
申请号:US544260
申请日:1995-10-17
申请人: Naoto Miyoshi , Shinichi Matsumoto , Tsuneyuki Tanizawa , Satoshi Iguchi , Toshiaki Tanaka , Shinichi Takeshima , Takaaki Kanazawa , Takahiro Hayashi , Motohisa Saiki , Kazuhiko Dohmae , Kiyoshi Yamazaki , Tadashi Suzuki , Koichi Kasahara , Syuji Tateishi
发明人: Naoto Miyoshi , Shinichi Matsumoto , Tsuneyuki Tanizawa , Satoshi Iguchi , Toshiaki Tanaka , Shinichi Takeshima , Takaaki Kanazawa , Takahiro Hayashi , Motohisa Saiki , Kazuhiko Dohmae , Kiyoshi Yamazaki , Tadashi Suzuki , Koichi Kasahara , Syuji Tateishi
IPC分类号: B01D53/94 , B01J23/58 , B01J23/63 , B01J23/652 , B01J23/656 , B01J23/89 , B01J37/02 , B01D53/60
CPC分类号: B01D53/945 , B01D53/9422 , B01J23/58 , B01J23/63 , B01J23/6522 , B01J23/6562 , B01J23/894 , B01J37/0242 , B01D2255/1021 , B01D2255/1023 , B01D2255/202 , B01D2255/204 , B01D2255/2042 , B01D2255/2063 , B01D2255/2065 , B01D2255/2073 , B01D2255/20738 , B01D2255/20746 , B01D2255/20753 , B01D2255/91 , Y02T10/22
摘要: A catalyst for purifying exhaust gases includes a porous support, at least one catalyst ingredient selected from Pt and Pd, and additional ingredients including (1) at least two rare-earth elements including La, (2) at least one rare-earth element including La and at least one transition element selected from Fe, Ni, Co and Mn, (3) at least two alkali metals, (4) at least one alkali metal and at least one rare-earth element including La, (5) at least one alkali metal and at least one transition element selected from Fe, Ni, Co and Mn, (6) at least two alkaline-earth metals, (7) at least one alkaline-earth metal and at least one rare-earth element including La, or (8) Ba, Li, La, Ce and Zr. A process for purifying an exhaust gas, by contacting the catalyst with an exhaust gas, is also provided.
摘要翻译: 用于净化废气的催化剂包括多孔载体,至少一种选自Pt和Pd的催化剂成分,以及另外的成分,包括(1)至少两种稀土元素,包括La,(2)至少一种稀土元素,包括 La和至少一种选自Fe,Ni,Co和Mn的过渡元素,(3)至少两种碱金属,(4)至少一种碱金属和至少一种包含La的稀土元素,(5)至少 一种碱金属和至少一种选自Fe,Ni,Co和Mn的过渡元素,(6)至少两种碱土金属,(7)至少一种碱土金属和至少一种包含La的稀土元素 ,或(8)Ba,Li,La,Ce和Zr。 还提供了一种通过使催化剂与废气接触来净化废气的方法。
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公开(公告)号:US5762892A
公开(公告)日:1998-06-09
申请号:US864894
申请日:1997-05-29
CPC分类号: B01D53/9422 , B01J23/58 , B01J23/63 , B01D2255/1021 , B01D2255/1023 , B01D2255/1025 , B01D2255/2042 , B01D2255/2063 , B01D2255/2065 , B01D2255/91
摘要: A catalyst for purifying carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gases at the stoichiometric point or in oxygen-rich atmosphere, is disclosed, and it includes a porous support, at least one noble metal catalyst ingredient loaded on the porous support, and selected from the group consisting of platinum, palladium and rhodium, and at least one NO.sub.X adsorbent loaded on the porous support, selected from the group consisting of alkali metals, alkaline-earth metals and rare-earth elements, and having an average particle diameter falling in a range of from 0.1 to 20 micrometers. A process for purifying, by bringing the exhaust gases into contact with the catalyst, is also disclosed.
摘要翻译: 公开了用于在化学计量点或富氧气氛中净化废气中的一氧化碳,烃和氮氧化物的催化剂,其包括多孔载体,至少一种负载在多孔载体上的贵金属催化剂成分,并且选择 从由铂,钯和铑组成的组中,以及负载在多孔载体上的至少一种NO x吸附剂,其选自碱金属,碱土金属和稀土元素,平均粒径落入 范围为0.1至20微米。 还公开了通过使废气与催化剂接触来净化的方法。
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公开(公告)号:US5075276A
公开(公告)日:1991-12-24
申请号:US342060
申请日:1989-04-24
申请人: Masakuni Ozawa , Mareo Kimura , Akio Isogai , Shinichi Matsumoto , Naoto Miyoshi
发明人: Masakuni Ozawa , Mareo Kimura , Akio Isogai , Shinichi Matsumoto , Naoto Miyoshi
IPC分类号: B01D53/94 , B01J23/10 , B01J23/56 , B01J23/63 , B01J23/83 , B01J32/00 , B01J37/02 , B32B18/00
CPC分类号: B01D53/945 , B01J23/63 , B01J23/83 , B01J37/024 , B01D2255/206 , B01D2255/20715 , B01D2255/40 , Y02T10/22
摘要: A catalyst for purification of exhaust gases, comprising a support substrate, a catalyst carrier layer formed on the support substrate and catalyst ingredients loaded on the catalyst carrier layer, wherein the catalyst carrier layer comprises alumina, cerium oxide, zirconium oxide and at least one oxide of rare earth element except cerium and lanthanum, and at least a part of cerium oxide, zirconium oxide and oxide of rare earth element except cerium and lanthanum is present in the form of composite oxide and/or solid solution. The catalyst for purification of exhaust gases is capable of purifying exhaust gases containing carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx).
摘要翻译: 一种用于净化废气的催化剂,包括支撑基材,形成在载体基材上的催化剂载体层和负载在催化剂载体层上的催化剂成分,其中催化剂载体层包含氧化铝,氧化铈,氧化锆和至少一种氧化物 除了铈和镧以外的稀土元素,除了铈和镧以外,至少一部分氧化铈,氧化锆和稀土元素的氧化物以复合氧化物和/或固溶体的形式存在。 用于净化废气的催化剂能够净化含有一氧化碳(CO),碳氢化合物(HC)和氮氧化物(NOx)的废气。
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公开(公告)号:US4808564A
公开(公告)日:1989-02-28
申请号:US129850
申请日:1987-12-08
申请人: Shinichi Matsumoto , Naoto Miyoshi , Masayasu Sato
发明人: Shinichi Matsumoto , Naoto Miyoshi , Masayasu Sato
IPC分类号: B01D53/94 , B01J23/10 , B01J23/22 , B01J23/26 , B01J23/34 , B01J23/56 , B01J23/63 , B01J23/76 , B01J21/04 , B01J32/00
CPC分类号: B01D53/945 , B01J23/10 , Y02T10/22
摘要: A catalyst for the purification of exhaust gases capable of maintaining excellent durability at elevated temperatures and preventing the formation of LaAlO.sub.3, comprises a support substrate, a catalyst carrier layer formed on the support substrate and catalyst ingredients carried on the catalyst carrier layer. The catalyst carrier layer comprises oxides of lanthanum and cerium in which the molar fraction of lanthanum atoms to the total rare earth atoms is 0.05 to 0.20, and the ratio of the member of the total rare earth atoms to the number of aluminum atoms is 0.05 to 0.25.
摘要翻译: 用于净化废气的催化剂能够在高温下保持优异的耐久性并防止LaAlO 3的形成,包括载体基材,形成在载体基材上的催化剂载体层和载于催化剂载体层上的催化剂成分。 催化剂载体层包括镧和铈的氧化物,其中镧原子与总稀土原子的摩尔分数为0.05至0.20,并且总稀土原子与铝原子数的比例为0.05至 0.25。
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公开(公告)号:US11602742B2
公开(公告)日:2023-03-14
申请号:US17178336
申请日:2021-02-18
申请人: Koji Sugiura , Hiromasa Nishioka , Naoto Miyoshi , Akemi Sato , Ryota Nakashima , Masatoshi Ikebe , Keisuke Murawaki , Hirotaka Ori
发明人: Koji Sugiura , Hiromasa Nishioka , Naoto Miyoshi , Akemi Sato , Ryota Nakashima , Masatoshi Ikebe , Keisuke Murawaki , Hirotaka Ori
IPC分类号: B01J23/40 , B01J23/42 , B01J23/44 , B01J23/46 , B01J35/00 , B01J35/04 , B01D53/94 , B01D46/24 , F01N3/28
摘要: Provided is an exhaust gas purification device that ensures an improved purification performance and a suppressed pressure loss. An exhaust gas purification device of the present disclosure includes a honeycomb substrate and an inflow cell side catalyst layer. disposed on a surface on the inflow cell side in an inflow side region of the partition wall. When a gas permeability coefficient of an inflow side partition wall portion including the inflow side region of the partition wall and the inflow cell side catalyst layer is Ka and a gas permeability coefficient of an outflow side partition wall portion including an outflow side region at least from the predetermined position to an outflow side end of the partition wall is Kb, a ratio Ka/Kb of the gas permeability coefficients is within a range of 0.4 or more and 0.8 or less.
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公开(公告)号:US07759278B2
公开(公告)日:2010-07-20
申请号:US11482685
申请日:2006-07-06
申请人: Satoshi Matsueda , Mareo Kimura , Yoshinori Ishii , Naoto Miyoshi
发明人: Satoshi Matsueda , Mareo Kimura , Yoshinori Ishii , Naoto Miyoshi
CPC分类号: C01G55/00 , B01D53/9422 , B01D53/945 , B01D2255/1021 , B01D2255/2042 , B01D2255/2065 , B01J23/002 , B01J23/63 , B01J35/0006 , B01J2523/00 , C01G55/002 , Y02T10/22 , B01J2523/25 , B01J2523/3712 , B01J2523/828
摘要: An exhaust gas-purifying catalyst includes a rare-earth element, an alkaline-earth element, and a precious metal. A part of the rare-earth element and a part of the alkaline-earth element form a composite oxide. The composite oxide and a part of the precious metal form a solid solution.
摘要翻译: 废气净化催化剂包括稀土元素,碱土金属元素和贵金属。 稀土元素的一部分和一部分碱土元素形成复合氧化物。 复合氧化物和贵金属的一部分形成固溶体。
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