公开(公告)号：US20190083931A1

公开(公告)日：2019-03-21

申请号：US16078082

申请日：2017-02-23

Applicant: CATALER CORPORATION

Inventor： Koki YANAGAWA ,  Satoshi MATSUEDA ,  Yu SAKURADA ,  Chihiro KASUYA

IPC: B01D53/94 ,  B01J27/053 ,  F01N3/20

Abstract: An exhaust gas purification catalyst, characterized by having a catalyst layer containing palladium, rhodium, and alumina, which supports a sulfate of an alkaline-earth metal selected from barium sulfate and strontium sulfate, and the correlation coefficients ρPd,AE and ρRh,AE calculated from the characteristic X-ray intensity measured using an electron beam micro-analyzer for the palladium, rhodium, and alkaline-earth metal being +0.75 to +1.00 and 0.00 to +0.25, respectively, using 350 points as measurement points obtained by equally dividing the catalyst layer into 351 parts in the thickness direction on a virtual straight line that runs through the catalyst layer in the thickness direction.