Mazda Motor Corporation

Taeko Shimizu

Hiroshi Yamada

Hiroshi Murakami

Takashi Takemoto

Yuki Koda

Keiko Matsui

Masahiko Shigetsu

Kenji Okamoto

Kenichi Yamamoto

Kazunari Komatsu

Satoshi Ichikawa

Toshitsugu Ueoka

Hirosuke Sumida

Kazuo Misonoo

Osamu Takayama

Masayuki Koishi

Yoshinori Tsushio

Tuyoshi Nishijima

Ichiro Kitayama

Tsuyoshi Nishijima

An object of the present invention is to provide a composition for use in adsorption treatment which is easy to handle; a method for easily preparing the composition in the form of grains without inhibiting its adsorption ability; products such as an adsorption treatment device and a filter for air-cleaning formed with the composition; and a method of adsorption treatment. The composition for use in adsorption treatment of the present invention includes an adsorbing substance which is reactive with components to be adsorbed in the presence of moisture, a water-absorbing substance, and a binder, wherein the binder is 1.3 to 8 weight percent with respect to the water-absorbing substance.

Composition for use in adsorption treatment, products formed with the same, and a method for producing adsorbent using the same

Deodorant composition, deodorizer and filter each containing the same, and method of deodorization

In the exhaust gas purifying catalyst (3), palladium is contained as a catalytic component and cerium oxide and (Ce, Pr) compound oxide is contained as a promoter. Now, the weight ratio of cerium oxide to (Ce, Pr) compound oxide is set between 9/1 and 7/3, and the ratio of praseodymium to cerium in the (Ce, Pr) compound oxide is set between 3 mol % and 50 mol %. In this way, because in this exhaust gas purifying catalyst (3), palladium with high low-temperature activity is used for a catalytic component, the exhaust gas purifying performance at low temperature is improved. And because cerium oxide and (Ce, Pr) compound oxide improves catalytic activity of palladium at high temperature, the exhaust gas purifying performance at high temperature, in particular, NOx purifying performance, is improved.

Catalyst for cleaning exhaust gas

A catalyst (3) for purifying an automotive exhaust gas, in which inner and outer catalytic layers (5,6), each of which has a base material and a catalytic material held by the base material, are stratified on a honeycomb-type carrier (4). In the catalyst (3), the inner catalytic layer (5) contains a palladium component as the catalytic component. Further the inner catalytic layer (5) contains a nickel oxide component for preventing poisoning of the palladium component. On the other hand, though the outer catalytic layer (6) contains a rhodium component as the catalytic component, it does not contain a palladium component nor a nickel oxide component.

Catalyst for purifying exhaust gas

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Fuchu-cho, Japan

Taeko Shimizu