Toyota Jidosha Kabushiki Kaisha

Toyota Jtdosha Kabushiki Katsha

Daisuke Shimoyama

Naoto Nagata

There is provided an exhaust gas purification system that allows efficient purification of NOx present in exhaust gas emitted from an internal combustion engine. The exhaust gas purification system of the disclosure comprises a first exhaust gas purification device that purifies exhaust gas emitted from an internal combustion engine, wherein the atmosphere alternately switches between a reducing agent-excess atmosphere and an oxidizing agent-excess atmosphere with respect to the stoichiometric atmosphere, and a second exhaust gas purification device that further purifies the exhaust gas that has been purified by the first exhaust gas purification device, wherein the first exhaust gas purification device has a three-way catalyst, and the second exhaust gas purification device has an exhaust gas purifying catalyst that comprises an AMnOspinel-type oxide support (A=Mg, Zn or Li) on which a precious metal is supported.

Exhaust gas purification system

An object of the present disclosure is to provide an NOstorage material having sufficient NOstorage capacity even in a low temperature region and a production method thereof. An NOstorage material including a composite oxide of silver and gallium. The composite oxide of silver and gallium is preferably a delafossite-type composite oxide. The composite oxide is produced by dissolving a silver salt and a gallium salt in a solvent and baking the solution, wherein the molar ratio of silver:gallium is preferably from 2:8 to 7:3.

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Susono, Japan

Daisuke Shimoyama