公开(公告)号：EP0707882A1

公开(公告)日：1996-04-24

申请号：EP95116599.2

申请日：1995-10-20

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO

发明人： Miyoshi, Naoto ,  Suzuki, Hiromasa ,  Ogawa, Osamu ,  Kimura, Mareo, c/o K.K. Toyota Chuo Kenkyusho ,  Kawai, Yuzo, c/o K.K. Toyota Chuo Kenkyusho ,  Yokota, Koji, c/o K.K. Toyota Chuo Kenkyusho ,  Takahashi, Naoki, c/o K.K. Toyota Chuo Kenkyusho ,  Tanaka, Toshiyuki, c/o K.K. Toyota Chuo Kenkyusho

IPC分类号： B01D53/94

CPC分类号： B01D53/9481 ,  B01D53/945 ,  B01J23/58 ,  B01J23/63 ,  Y02T10/22

摘要： An automotive exhaust catalyst includes a support, which is less likely to adsorb SO x contained in exhaust gases thereon, an NO x storage compound loaded on the support, and a noble metal element loaded on the support. The support is an alumina support with a Ti-Zr composite oxide loaded thereon, or is formed of a Ti-Zr or Ti-Zr-Y composite oxide. The composite oxide inhibits the NO x storage compound, which is selected from alkali metals, alkaline-earth metals and rare-earth elements, from being poisoned by sulfur, and enhances the thermal resistance of the support. Thus, the automotive exhaust catalyst can effectively purify NO x contained in lean-side exhaust gases, even after it is subjected to a thermal durability test.

摘要翻译： 汽车尾气催化剂包括不太可能吸附在其中的废气中所含的SOx，负载在载体上的NOx储存化合物和负载在载体上的贵金属元素的载体。 载体是负载有Ti-Zr复合氧化物的氧化铝载体，或由Ti-Zr或Ti-Zr-Y复合氧化物形成。 复合氧化物抑制从碱金属，碱土金属和稀土元素中选择的NOx储存化合物被硫中毒，并且增强了载体的耐热性。 因此，即使进行耐热试验，汽车尾气催化剂也能够有效地净化稀薄侧排气中所含的NOx。

公开(公告)号：EP1020223A2

公开(公告)日：2000-07-19

申请号：EP00100596.6

申请日：2000-01-12

申请人： Kabushiki Kaisha Toyota Chuo Kenkyusho

发明人： Hatanaka, Miho, c/o K.K. Toyota Chuo Kenkyusho ,  Suda, Akihiko, c/o K.K. Toyota Chuo Kenkyusho ,  Tanaka, Toshiyuki, c/o K.K. Toyota Chuo Kenkyusho ,  Takahashi, Naoki, c/o K.K. Toyota Chuo Kenkyusho ,  Yamamoto, Toshio, c/o K.K. Toyota Chuo Kenkyusho ,  Akimoto, Yusuke, c/o K.K. Toyota Chuo Kenkyusho ,  Terao, Naohiro

IPC分类号： B01J35/10 ,  B01J35/04 ,  B01D53/94

CPC分类号： B01D53/02 ,  B01D53/945 ,  B01D2253/104 ,  B01D2253/308 ,  B01D2253/31 ,  B01D2257/404 ,  B01D2258/01 ,  B01D2259/4566 ,  B01J21/04 ,  B01J21/066 ,  B01J35/002 ,  B01J35/04 ,  B01J35/1019 ,  B01J35/1061 ,  B01J35/1066 ,  B01J37/088 ,  Y02T10/22

摘要： Disclosed are a porous material comprising particles without substantial fibrous structure and having pores, the pores having a mean pore diameter in a meso-pore region, sharp pore size distribution, and at least a part of the pores being connected three-dimensionally to form a three-dimensional network structure with random passages, the porous material preferably being of alumina and having a spongy structure or the porous material preferably being an aggregate of particles having an aspect ratio of 3 or less; a process of producing the porous material which includes a step of aging a system capable of becoming an oxide on thermal decomposition; a catalyst for exhaust gas purification having excellent NO x removal performance, high resistance against sulfur poisoning, and satisfactory high-temperature durability which comprises the porous material as a carrier having supported thereon a noble metal and an NO x storage component; and a method of exhaust gas purification using the catalyst.