| abstract |
【Task】 A catalyst for purifying nitrogen oxides in exhaust gas of internal combustion engines with high efficiency in the coexistence of oxygen, and resistant to sulfur oxides, a catalyst poisoning substance in exhaust gas, and capable of withstanding high-temperature atmospheres. provide. [Solution] An alkaline earth metal and a precursor of titania are mixed as active components on a porous carrier, and then calcined, and part of the calcined body is an exhaust gas for an internal combustion engine in which a composite oxide of an alkaline earth metal and titanium is supported. Purification catalyst. 【effect】 Nitrogen oxides can be purified with high efficiency from exhaust gas containing excess oxygen and containing SOx. [Selection diagram] None |