Patent application number | Description | Published |
20100227757 | INORGANIC MIXED OXIDE AND CATALYST FOR PURIFICATION OF EXHAUST GAS USING THE SAME - A particulate inorganic mixed oxide comprising: aluminum; zirconium; cerium; and first and second additional elements each selected from the group consisting of rare earth elements other than cerium and alkaline earth elements, wherein | 09-09-2010 |
20130150236 | EXHAUST GAS PURIFICATION CATALYST - Disclosed is an exhaust gas purification catalyst that is provided with a base material and a catalyst later, which is formed on the base material and has an upstream side catalyst section and a downstream side catalyst section. Ba is added to the upstream side catalyst section and the downstream side catalyst section, the quantity of Ba added to the upstream side catalyst section is a quantity corresponding to 8 to 22 mass % relative to the total mass of a ceria-zirconia composite oxide contained in the upstream side catalyst section, and the quantity of Ba added to the downstream side catalyst section is a quantity corresponding to 3 to 7 mass % relative to the total mass of a ceria-zirconia composite oxide contained in the downstream side catalyst section | 06-13-2013 |
20140357480 | EXHAUST GAS PURIFICATION CATALYST - An exhaust gas purification catalyst is provided with a substrate and a catalyst coating layer formed on the surface of the substrate. The catalyst coating layer is formed into a layered structure having upper and lower layers, with a lower layer being closer to the surface of the substrate and an upper layer being relatively farther therefrom. The catalyst coating layer is provided with Rh and Pd as precious metal catalysts and is provided with an OSC material having an oxygen storage capacity as a support. The Rh is disposed in the upper layer of the catalyst coating layer, and the Pd is disposed in both the upper layer and the lower layer of the catalyst coating layer. At least a portion of the Pd in the upper layer and in the lower layer is supported on the OSC material. The mass ratio of the Pd disposed in the upper layer to the Pd disposed in the lower layer is not more than 0.4. | 12-04-2014 |
20150045212 | EXHAUST GAS PURIFICATION CATALYST - An exhaust gas purification catalyst includes a composite oxide support, and a precious metal catalyst supported on the composite oxide support. The composite oxide support includes alumina, zirconia, ceria, a first additive element oxide and a second additive element oxide. The first additive element oxide contains an additive element selected from the group consisting of rare earth elements excluding cerium and alkali earth elements. The second additive element oxide contains an additive element selected from the group consisting of rare earth elements excluding cerium and alkali earth elements. In the composite oxide support, alumina is contained in a range of 30 to 40% by mass and zirconia is contained in a range of 36 to 46% by mass. | 02-12-2015 |
20150125354 | CATALYTIC CONVERTER - A catalytic converter including: a cell structured first substrate; and a cell structured second substrate provided at a downstream side of the first substrate. The first substrate has a uniform cell density. The second substrate includes a center area with a first cell density and a surrounding area with a second cell density that is lower than the first cell density. The first substrate and the second substrate are mounted in tandem. | 05-07-2015 |
Patent application number | Description | Published |
20120283091 | CATALYST FOR CONVERTING EXHAUST GASES - A catalyst for purifying exhaust gases includes a substrate, and a catalytic layer. The catalytic layer includes a lower catalytic layer, a first upper catalytic layer, and a second upper catalytic layer. The lower catalytic layer being loaded with Pd and/or Pt is formed on the substrate. The first upper catalytic layer being loaded with Pd covers an upstream side of the lower catalytic layer, and exhibits a concentration of loaded Pd that falls in a range of from 4.5 to 12% by mass when the entirety of the first upper catalytic layer is taken as 100% by mass. The second upper catalytic layer being loaded with Rh covers a downstream side of the lower catalytic layer. | 11-08-2012 |
20130029838 | EXHAUST GAS PURIFYING CATALYST - An exhaust gas purifying catalyst includes a substrate that defines an exhaust gas passage; a lower catalyst layer formed over the substrate, and an upper catalyst layer formed over the lower catalyst layer. The lower catalyst layer has a lower catalytic precious metal that contains at least one of Pt and Pd, and a lower-layer carrier that supports the lower catalytic precious metal. The upper catalyst layer has an upper catalytic precious metal that contains Rh, and an upper-layer carrier that supports the upper catalytic precious metal. The upper-layer carrier includes an inorganic mixed oxide that contains Ce, Zr, Al, Nd, and at least one element selected from the group consisting of rare earth elements other than Ce and alkaline earth elements. The Nd is unevenly distributed in covering layers that covers surfaces of interior regions within the inorganic mixed oxide. | 01-31-2013 |
20130310248 | DOUBLE LAYERED EXHAUST GAS PURIFICATION CATALYST - Provided is an exhaust gas purification catalyst ( | 11-21-2013 |