| 摘要 |
A gas purification catalyst is provided to improve the performance of the gas purification catalyst, and a gas purification method and a gas purification apparatus are provided to efficiently purify components in exhaust gas, particularly NOx and CO, with the use of the gas purification catalyst. A catalyst comprises a cerium-zirconium composite oxide and gold. A catalyst comprises a cerium oxide-containing porous carrier, zirconium, and gold. The catalyst is disposed in gas containing at least one of nitrogen oxide and carbon monoxide. The catalyst is disposed in gas containing carbon monoxide and water vapor. As a gas purification catalyst for removing at least one of nitrogen oxides and carbon monoxide from gas, the gas purification catalyst comprises a cerium-zirconium composite oxide and gold. As a gas purification catalyst for removing at least one of nitrogen oxides and carbon monoxide from gas, the gas purification catalyst comprises a cerium oxide-containing porous carrier, zirconium, and gold. The gas is exhaust gas from a boiler or an internal combustion engine. The porous carrier comprises an oxide of two or more elements selected from cerium, zirconium, praseodymium, neodymium, terbium, samarium, gadolinium, and lanthanum. The porous carrier comprises a composite oxide of two or more elements selected from cerium, zirconium, praseodymium, neodymium, terbium, samarium, gadolinium, and lanthanum.
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