Mazda Motor Corporation

Tokyo Roki Co., Ltd.

Hisaya Kawabata

Masahiko Shigetsu

Akihide Takami

Masaaki Akamine

Yasuhiro Matsumura

Hiroshi Yamada

Hideharu Iwakuni

Yuki Murakami

Katsuyuki Fujita

Kenji Okamoto

Seiji Miyoshi

Takeo Yamauchi

Kazuya Yokota

Yusuke Koike

Kazuo Misonoo

Yasuhiro Ochi

Tadashi Tokuyama

Susumu Mineoi

Toshihiko Ohsumi

Tomohiko Kawamoto

A device includes a first catalystincluding a Pd-containing catalyst layer and a Rh-containing catalyst layer and a second catalystcontaining Pt-loaded alumina and containing neither Rh nor Pd. The first catalyst or the second catalyst are disposed in one place in such a manner that one of the first catalystor the second catalystis located upstream of the other in a flow direction of an exhaust gas from an engine

Exhaust gas purification catalyst device and exhaust gas purification method

An exhaust gas purification catalytic devicecontains Pt, Pd, and Rh as catalytic metals. The catalytic metal Pt is loaded on silica-alumina which serves as a support, and Pt-loaded silica-alumina obtained by loading the Pt on the silica-alumina is contained in a catalytic layer with which an exhaust gas contacts first.

Catalyst device for exhaust gas purification and method for exhaust gas purification

An exhaust gas purification catalyst includes a Rh-containing catalyst layer provided on a base material. The Rh-containing catalyst layer includes Rh-supporting Zr-based composite oxide in which Rh6 is supported on Zr-based composite oxide containing Zr and a rare earth metal except Ce. The Rh-supporting Zr-based composite oxide has been previously subjected to a reduction treatment.

Exhaust gas purification catalyst and method for producing the same

An exhaust gas purification catalytic material for purifying exhaust gas from an engine includes ZrLaY composite oxide containing ZrOas a main component, 2% by mass or more and 10% by mass or less of LaO, and 2% by mass or more and 20% by mass or less of YO, and Rh is loaded on the composite oxide.

Exhaust gas purification catalyst

An exhaust gas purification catalyst includes a Rh-containing catalyst layer provided on a base material. The Rh-containing catalyst layer includes a binder material of Rh-doped CeZr-based composite oxide containing Ce and Zr and doped with Rh. The binder material has been previously subjected to a reduction treatment.

A catalyst layer includes: a first mixed oxide particle componentwhich contains Ce and Rhand in which Rh is partially exposed at particle surfaces; and a second mixed oxide particle componentcontaining Ce, Zr, and a rare earth metal except Ce. The particle size distribution of the first mixed oxide particle componenthas a peak in the particle size range from 100 nm to 300 nm, both inclusive. The particle size distribution of the second mixed oxide particle componenthas a peak in a particle size range larger than the particle size range in which the first mixed oxide particle componenthas the peak. At least part of particles of the first mixed oxide particle componentis attached to at least part of particles of the second mixed oxide particle component

An exhaust gas purifying catalyst includes a carrier and a catalyst layer provided on the carrier. The catalyst layer includes active AlOon which a noble metal is carried, an oxygen storage agent on which Rh is carried, AlOcoated with ZrOon which Rh is carried, and a binder material.

Exhaust gas purifying catalyst

A catalyst comprises an HC trapping material that is capable of trapping HC in an exhaust gas under low temperatures and releasing HC with a raise in temperature and catalytic material containing a Ce&#x2014;Pr double oxide capable of oxidizing and purifying HC from the HC trapping material with a high efficiency.

An inside layer including zeolite and an outside layer including alumina and Pd are formed in a layered shape on a carrier, and Ag and Bi are simultaneously allowed to be carried on the inside and outside layers through impregnation. Thus, production of an alloy through a reaction between Pd and Ag can be suppressed by Bi.

Growing community of inventors

Hiroshima, Japan

Hisaya Kawabata