公开(公告)号：US11821349B2

公开(公告)日：2023-11-21

申请号：US17276505

申请日：2019-09-09

申请人： CATALER CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Shogo Kawamura ,  Tomomasa Aikawa ,  Isao Naito ,  Hiroki Nihashi ,  Nobuyuki Takagi ,  Takeshi Nobukawa

IPC分类号： F01N3/20 ,  B01J23/46 ,  B01J27/053 ,  B01J37/02 ,  B01J37/08

CPC分类号： F01N3/20 ,  B01J23/46 ,  B01J27/053 ,  B01J37/02 ,  B01J37/08 ,  F01N2250/12 ,  F01N2510/0684

摘要： An exhaust gas purification catalyst including an alkaline-earth metal carried on a porous carrier in a highly dispersed state. The catalyst layer of the exhaust gas purification catalyst has an alkaline-earth metal carrying region including a porous carrier, Pt, and a sulfuric acid salt of at least one alkaline-earth metal carried on the porous carrier, wherein a value of RAe/Pt is 0.5 or more, where RAe/Pt represents the Pearson's correlation coefficient calculated using α and β in each pixel obtained by, for a cross section of the region, performing the area analysis by FE-EPMA under the conditions of: pixel size 0.34 μm×0.34 μm; and number of measured pixels 256×256; and measuring an intensity (α: cps) of a characteristic X ray of an element (Ae) of the alkaline-earth metal and an intensity (β: cps) of a characteristic X ray of Pt for each pixel.

公开(公告)号：US11504700B2

公开(公告)日：2022-11-22

申请号：US16603380

申请日：2018-04-09

申请人： CATALER CORPORATION

发明人： Shunsuke Oishi ,  Shogo Kawamura ,  Takahiro Nagata ,  Hirotaka Ori ,  Minoru Itou

IPC分类号： B01J21/04 ,  B01J21/06 ,  B01J21/08 ,  B01J21/10 ,  B01J21/12 ,  B01J23/02 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J23/58 ,  B01J35/00 ,  B01J35/04 ,  B01J37/02 ,  B01J37/08 ,  B01J27/053 ,  B01D53/94 ,  F01N3/28

摘要： The present invention provides an exhaust gas purification catalyst including an alkaline earth metal supported in a highly dispersed state on a porous carrier. A catalyst layer of the exhaust gas purification catalyst provided by the invention has an alkaline earth metal-supporting region including a porous carrier, a catalyst metal belonging to the platinum group, and a sulfate of at least one type of alkali earth metal supported on the porous carrier. In a cross-section of this region, a Pearson correlation coefficient RAe/M is at least 0.5 as calculated using α and β for each pixel obtained by carrying out area analysis by FE-EPMA under conditions of pixel size of 0.34 μm×0.34 μm, and measured pixel number 256×256, and by measuring the characteristic X-ray intensity (α:cps) of the alkaline earth metal element (Ae) and the characteristic X-ray intensity (β:cps) of the main constituent element of the inorganic compound constituting the porous carrier for each pixel.