JP2015183587A5 - - Google Patents

Claims (11)

  An oxidation catalyst that oxidizes CO, HC, NO contained in the exhaust gas of the heat engine is provided, and the oxidation catalyst is selected from Pt, Zn, Ba, Ca, and P as catalytic active components supported on the porous carrier. The content of Zn, Ba, Ca, P is 0.02 to 0.5 mol part in the case of Ba and 0.02 to 0. 0 in the case of Ca with respect to 2 mol part of the support. An exhaust gas purifying apparatus for a heat engine, characterized by 5 mol parts, 0.02 to 0.7 mol parts in the case of Zn, and 0.02 to 1.4 mol parts in the case of P.   2. The exhaust gas purifying apparatus for a heat engine according to claim 1, wherein the content of Zn, Ba, Ca, P is 0.02 to 0. 0 with respect to 2 mol parts of the support regardless of the type of the catalytically active component. An exhaust gas purifying device for a heat engine, characterized in that the amount is 5 mol. The exhaust gas purification apparatus for a heat engine according to any one of claims 1 and 2 , wherein Pt, P, and at least one selected from Zn, Ba, and Ca are used as catalytic active components of the oxidation catalyst. A heat engine exhaust gas purification apparatus comprising: In the exhaust gas purifying apparatus of the heat engine according to any one of claims 1 to 3, it relates to a flow direction of the flue gas, the heat engine, characterized in placing the NOx purifying catalyst downstream of the oxidation catalyst Exhaust gas purification device. The exhaust gas purification apparatus for a heat engine according to claim 4 , wherein NH ₃ is added to the front stage of the NOx purification catalyst. In the exhaust gas purifying apparatus of the heat engine according to any one of claims 4 and 5, downstream of the NOx purifying catalyst, CO in the exhaust gas, that has been further established a catalyst for oxidizing HC or NH ₃ An exhaust gas purification device for a heat engine. In the exhaust gas purifying apparatus of the heat engine according to any one of claims 1 to 6, wherein the oxidation catalyst, as a catalyst active component, Pd, characterized in that it further comprises at least one selected from Ce Exhaust gas purification device for heat engine. In the exhaust gas purifying apparatus of the heat engine according to any one of claims 7 claim 4, wherein the NOx purifying catalyst on the zeolite carrier, as a catalytically active ingredient, V, Mn, Fe, Co , Ni, Cu An exhaust gas purifying device for a heat engine, which carries at least one selected from Zr and Zr. In the exhaust gas purifying apparatus of the heat engine according to any one of claims 1 to claim 8, the exhaust gas flowing into the oxidation catalyst is always oxygen excess than the stoichiometric amount in the oxidation reaction of CO and HC An exhaust gas purification device for a heat engine characterized by maintaining an atmosphere.   Pt and Zn, Ba, Ca as catalytic active components supported on the porous carrier in the exhaust gas passage of a heat engine that burns fuel in an oxygen atmosphere in excess of the stoichiometric amount in the oxidation reaction of CO and HC , P, and the content of Zn, Ba, Ca, P is 0.02 to 0.5 mol parts in the case of Ba, and 0. 02 to 0.5 mol parts, in the case of Zn, 0.02 to 0.7 mol parts in the case of P, and in the case of P, an oxidation catalyst adjusted to 0.02 to 1.4 mol parts is installed, and CO, HC, NO in the exhaust gas An exhaust gas purification method characterized by oxidizing the gas.   A porous carrier and a catalytically active component supported on the porous carrier, the catalytically active component comprising Pt and at least one selected from Zn, Ba, Ca, P, and the Zn, Ba, The content of Ca and P is 0.02 to 0.5 mol parts in the case of Ba, 0.02 to 0.5 mol parts in the case of Ba, and 0.02 to 0 in the case of Zn with respect to 2 mol parts of the carrier. CO, HC, NO oxidation catalyst, characterized in that it is 0.02 to 1.4 mol parts in the case of 0.7 mol parts and P.