Catalytic Oxidation of Ammonia to NO over Perovskite-type LaMnO3 and LaVO4 Catalysts

Catalytic oxidation of NH3 to NO + NO2 (NOX) over perovskite-type LaMnO3 and LaVO4 prepared by sol-gel was studied. X-ray diffractometry and scanning electron microscopy analyses confirmed that the prepared LaMnO3 and LaVO4 had perovskite-type porous structure, and a specific surface area of 33.58 m(2)/g and 1.2 m(2)/g for LaMnO3 and LaVO4 was measured by BET, respectively. The catalytic oxidation of ammonia to NOX was found to begin at 350 A degrees C, and approximately 88 and 95% of NH3 was oxidized to NOX at 600 A degrees C over LaMnO3 and LaVO4, respectively.