公开(公告)号：EP1777197A4

公开(公告)日：2009-04-29

申请号：EP05751325

申请日：2005-06-09

申请人： TOYOTA CHUO KENKYUSHO KK

发明人： SHIMAZU TAKASHI ,  TSUJI RYUSUKE ,  SOBUKAWA HIDEO ,  SENO YOSHIKI ,  HASEGAWA YORIKO

IPC分类号： C01G1/02 ,  B01D53/94 ,  B01J23/10 ,  B01J23/63 ,  B01J35/00 ,  B01J37/00 ,  B01J37/02 ,  C01F7/02 ,  C01G23/00 ,  C01G25/00 ,  C01G49/00 ,  C09D1/00

CPC分类号： B01J23/63 ,  B01D53/945 ,  B01D2255/20707 ,  B01D2255/20715 ,  B01D2255/2092 ,  B01D2255/9202 ,  B01D2255/9207 ,  B01J23/10 ,  B01J35/002 ,  B01J37/0036 ,  B01J37/0226 ,  C01G23/00 ,  C01G23/002 ,  C01G25/00 ,  C01G25/006 ,  C01G49/00 ,  C01G49/009 ,  C01P2002/72 ,  C01P2002/85 ,  C01P2004/04 ,  C01P2006/16 ,  C09D1/00 ,  Y02T10/22

摘要： Disclosed is a metal oxide nanoporous body composed of two or more metal oxides selected from the group consisting of alumina, zirconia, titania, iron oxides, rare earth element oxides, alkali metal oxides and alkaline earth metal oxides. Such a metal oxide nanoporous body is characterized by having nanopores of not more than 10 nm wherein the above-described metal oxides are uniformly dispersed in a wall portion.

公开(公告)号：EP1364706A4

公开(公告)日：2005-08-24

申请号：EP02705061

申请日：2002-02-28

申请人： TOYOTA CHUO KENKYUSHO KK

发明人： SAIKI MOTOHISA ,  MATSUNAGA SHINICHI ,  TSUJI RYUSUKE ,  SUDA AKIHIKO

IPC分类号： F01N3/08 ,  B01D53/56 ,  B01D53/81 ,  B01D53/86 ,  B01D53/94 ,  B01J23/40 ,  B01J23/58 ,  B01J23/63 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  F01N3/10 ,  F01N3/28

CPC分类号： B01D53/9422 ,  B01D53/8628 ,  B01D2255/1021 ,  B01D2255/1025 ,  B01D2255/2022 ,  B01D2255/2025 ,  B01D2255/2042 ,  B01J23/40 ,  B01J23/63 ,  B01J35/10 ,  B01J35/108 ,  B01J37/0018 ,  B01J37/0215 ,  B01J37/0242

摘要： An exhaust gas purifying catalyst comprising a base material, a coat layer formed on the base layer and consisting of a porous carrier, and noble metal carried on the coat layer, wherein the coat layer is such that the pore volume of pores 0.1-20 mu m in diameter accounts for at least 50 % of that of pores up to 50 mu m in diameter, and the pore volume of pores 0.5-10 mu m in diameter accounts for at least 20 % of that of pores up to 50 mu m. In comparison with conventional coat layers where pores 0.01 mu m in diameter account for the majority of the pores, a pore diameter is 10- to 2000-folded, and a gas diffusion speed through pores is also 10- to 2000-folded. In addition, noble metal carried up to the inside of a coat layer and along pores can restrict the grain growth of noble metal and increase a utilization efficiency of an NOx occluding agent within the coat layer. Accordingly, an increase in NOx occluding amount in a lean oxygen surplus atmosphere is made compatible with a high-efficiency occluded NOx reduction/purification by a short-time rich spike.