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1. (WO2017150350) EXHAUST GAS PURIFICATION CATALYST

Pub. No.:    WO/2017/150350    International Application No.:    PCT/JP2017/006934
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Fri Feb 24 00:59:59 CET 2017
IPC: B01J 27/053
B01D 53/94
B01J 37/02
B01J 37/08
F01N 3/10
Applicants: CATALER CORPORATION
株式会社キャタラー
Inventors: YANAGAWA, Koki
▲柳▼川 幸毅
MATSUEDA, Satoshi
松枝 悟司
SAKURADA, Yu
桜田 雄
KASUYA, Chihiro
糟谷 知弘
Title: EXHAUST GAS PURIFICATION CATALYST
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.