Abstract: An exhaust gas purifying system for an automotive internal combustion engine. The exhaust gas purifying system comprises a flow-through monolithic catalyst disposed in an exhaust gas passageway through which exhaust gas flows. The monolithic catalyst functions to adsorb and oxidize a soluble organic fraction in exhaust gas, to adsorb nitrogen oxides in exhaust gas in a condition in which a temperature of exhaust gas is not higher than 200° C. and to allow carbon particle in exhaust gas to pass through the monolithic catalyst. Additionally, a filter catalyst is disposed in the exhaust gas passageway downstream of the flow-through monolithic catalyst. The filter catalyst functions to trap the carbon particle and to oxidize hydrocarbons, carbon monoxide and nitrogen monoxide in exhaust gas.

Abstract: An exhaust gas purifying system for an automotive internal combustion engine. The exhaust gas purifying system comprises a flow-through monolithic catalyst disposed in an exhaust gas passageway through which exhaust gas flows. The monolithic catalyst functions to adsorb and oxidize a soluble organic fraction in exhaust gas, to adsorb nitrogen oxides in exhaust gas in a condition in which a temperature of exhaust gas is not higher than 200° C. and to allow carbon particle in exhaust gas to pass through the monolithic catalyst. Additionally, a filter catalyst is disposed in the exhaust gas passageway downstream of the flow-through monolithic catalyst. The filter catalyst functions to trap the carbon particle and to oxidize hydrocarbons, carbon monoxide and nitrogen monoxide in exhaust gas.

Abstract: A hydrogen-containing gas producing system of an onboard type, for producing hydrogen-containing gas to be used for purification of exhaust gas of an internal combustion engine. The hydrogen-containing system comprises a fuel supply source for supplying fuel as a raw material of the hydrogen-containing gas. A carrier gas supply source is provided for supplying a carrier gas for carrying the fuel. A device is provided for vaporizing the fuel so as to form a vaporized fuel serving as a reaction gas. The fuel vaporizing device is connected to the fuel supply source and the carrier gas supply source. Additionally, a reforming section is connected to the fuel vaporizing device, for reforming the reaction gas so as to produce the hydrogen-containing gas.