A novel CeO2-MoO3-WO3/TiO2 catalyst for selective catalytic reduction of NO with NH3

A novel CeO2-MoO3-WO3/TiO2 (CMWT) catalyst was prepared by a single step sol-gel (SG) method. It exhibited 93.8%-98.9% of NO conversion at 275-450 degrees C and high tolerance to 10% H2O and 1000 ppm SO2 at a gas hourly space velocity (GHSV) of 90,000 h(-1). Superior SCR activity of CMWT catalyst could be attributed to the presence of more Ce3+ and chemisorbed oxygen, higher redox ability, stronger adsorption capacity of NH3 species and the strong interaction among ceria, molybdenum, tungsten and titania.