(280f) Application of V2o5 in Nox Reduction and Evaluation of Various Effects on Variation of Its Activity

In this research reduction of contaminant NOx by selective catalytic reduction was investigated. Catalysts were made of a mixture of carrier materials, such as titania or ã-alumina, and active components such as V2O5 and promoters such as La2O3, Ce2O3, WO3, and MoO3. Active metal and promoters were deposited on the support by adopting a wet impregnation method. For evaluation of factors effects such as V, La, Ce, W, Mo, loading, calcination time, temperature, support type and special manner of accomplish impregnation, 12 samples were made by experimental design method. For evaluation of specification of samples analytical techniques such as XRD, XRF, specific surface area measurements, pore size distribution and reactor test for evaluation of activity were used. It was observed that catalyst with alumina support converted more NOx than catalyst with titania support. NOx conversion varies very low with increasing calcination time and Ce loadings. NOx conversion decreases with increasing of W and La loadings and also calcination temperature and increases with increasing of V and Mo loadings though (Maximum average of activity for 4% and 1% Vanadium was obtained 29.31 and 21.30 respectively). Finally single-stage operations converted more NOx than multiple operations.