Kabushiki Kaisha Riken

Kozo Izuka, Director-general of Agency of Industrial Science and

Kozo Izuka Director-general of Agency of Industrial Science & Technology

Hyogoro Aoyama

Kiyohide Yoshida

Satoshi Sumiya

Hideo Ohuchi

Akira Obuchi

Akihiko Ohi

Takashi Ibusuki

Gyo Muramatsu

Koichi Mizuno

Yoshikazu Takahashi

Nobuyuki Matsumura

Atsushi Ogata

Seiji Makino

Hidenori Yoshiyama

Akiniko Ohi

An exhaust gas cleaner comprising a catalyst carried on a heat-resistant ter, the catalyst comprising (a) one or more alkali metals, (b) one or more metals selected from the group consisting of Zn, Sn and transition metals excluding platinum-group metals, and (c) one or more rare earth metals, and a method of cleaning an exhaust gas with it. Alkali metals may be added to a fuel.

Method of cleaning an exhaust gas containing nitrogen oxides and fine

An exhaust gas cleaner comprising (a) at least one filter made of a heat-resistant and electrically insulating material for trapping floating fine particles in an exhaust gas; and (b) at least a pair of electrodes stacked with the filter alternately, voltage being applied between the adjacent electrodes to burn electrically conductive and burnable fine particles trapped in the filter by heat generated by a current flowing between the adjacent electrodes, and the direction of the flow of the exhaust gas in the filter being essentially parallel to that of the laminate surface of the electrodes. The filter may carry a catalyst which functions to reduce harmful gas components in the exhaust gas.

Exhaust gas cleaner

An exhaust gas cleaner comprising a catalyst carrier on a heat-resistant filter, the catalyst comprising (a) one or more alkali metals, (b) one or more metals selected from the group consisting of Zn, Sn and transition metals excluding platinum-group metals, and (c) one or more rare earth metals, and a method of cleaning an exhaust gas with it. Alkali metals may be added to a fuel.

Catalyst for cleaning exhaust gas

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Tsukuba, Japan

Hyogoro Aoyama