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.