Toyota Jidosha Kabushiki Kaisha

Takuto Hirose

Masao Watanabe

Akira Morikawa

Shigeharu Takagi

Masakazu Aoki

Yuichi Sobue

Kiyoshi Yamazaki

Yasutaka Nagai

Noboru Otake

Keisuke Kishita

Yusaku Onochi

Yusuke Shinmyo

Mitsuru Matsumoto

Provided is a methanation catalyst processing method capable of suppressing degradation of a catalyst performance. A methanation catalyst processing method of the present disclosure includes oxidizing nickel through a heat treatment of a methanation catalyst by supplying an oxygen gas containing oxygen to a reactor, the reactor housing the methanation catalyst containing the nickel as a catalyst component. In the oxidizing, the oxygen gas is supplied to the reactor such that the oxygen is supplied to 1 g of the methanation catalyst at a supply rate in a range of from 0.0213 mmol-O/sec·g-cat. to 0.0638 mmol-O/sec·g-cat., and a time period of the heat treatment of the methanation catalyst by supplying the oxygen gas to the reactor is set to 30 minutes or more.

Methanation catalyst processing method, methane producing method, and methanation catalyst

An exhaust gas controlling catalyst includes zirconia particles; ceria particles which contact the zirconia particles, of which a mean particle size is smaller than a mean particle size of the zirconia particles; and an active metal that is supported on at least the ceria particles in a dispersed manner.

Exhaust gas catalyst, method for the production of carrier, method for the production of exhaust gas catalyst, and apparatus for treating exhaust gas

An exhaust gas purification catalyst includes an alumina support, a silica layer, and active metal particles. The silica layer is formed on a surface of the alumina support. The active metal particles are formed of platinum and palladium, the platinum and the palladium being supported on the silica layer. A ratio of fine particles having a particle size of 2.0 nm or less to all the active metal particles is 50% or higher in terms of the number of particles, the fine particles being included in the active metal particles. A ratio of fine alloy particles having a palladium content ratio of 10 at % to 90 at % to all the fine particles is 50% or higher in terms of the number of particles, the fine alloy particles being included in the fine particles.

Exhaust gas purification catalyst, method of producing the same, and exhaust gas purification method using the same

An exhaust gas control apparatus for an internal combustion engine includes: a NOx purification catalyst arranged in an exhaust passage of the internal combustion engine; a degradation degree estimating unit estimating a degradation degree of the NOx purification catalyst; and an air-fuel ratio control unit adjusting an air-fuel ratio of exhaust gas flowing into the NOx purification catalyst, wherein, until the estimated degradation degree of the NOx purification catalyst reaches a predetermined degradation degree, the air-fuel ratio control unit adjusts the air-fuel ratio of the exhaust gas to a rich air-fuel ratio, and, when the estimated degradation degree of the NOx purification catalyst exceeds the predetermined degradation degree, the air-fuel ratio control unit changes the air-fuel ratio of the exhaust gas from the rich air-fuel ratio to a lean air-fuel ratio so that the NOx purification catalyst is regenerated.

Method and apparatus for exhaust gas control of an internal combustion engine

Growing community of inventors

Seto, Japan

Takuto Hirose