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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsToshihiro Takada, Hiroaki Takahashi, Masaru Ishii, Saeko Kurachi
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In an exhaust gas in an oxygen-rich atmosphere, a method of purifying an exhaust gas and a catalyst for purifying an exhaust gas, which can exhibit a high NOx conversion securely, are provided. Disclosed is a method of purifying an exhaust gas that reduces and purifies NOx in an exhaust gas in an oxygen-rich atmosphere. Here, as a catalyst for purifying an exhaust gas, a loading layer comprising zeolite is loaded with alumina sulfate and cerium sulfate-zirconium composite oxide, and Pt is loaded on these. And, in a temperature range where HC are not oxidized, the HC are adsorbed and held by the zeolite, the HC, which the zeolite releases at the temperature increment, are subjected to cracking by the zeolite, the alumina sulfate and the cerium sulfate-zirconium composite oxide, and the thus produced low-grade HC are turned into reducing agents, thereby reducing and purifying the NOx in the exhaust gas.
A catalyst for purifying an exhaust gas comprising:
A catalyst for purifying an exhaust gas comprising:
A catalyst for purifying an exhaust gas comprising:
A catalyst for purifying an exhaust gas comprising:
A catalyst for purifying an exhaust gas comprising:
A catalyst for purifying an exhaust gas comprising:
Dependencies are inferred from the claim text.