NO has been identified as a major pollutant causing various concerns like, health, acid rain, greenhouse gas, photochemical smog, etc. Different environmental legislatives have forced to control NO emissions around the globe. Selective catalytic reduction (SCR) of NO has been emerged out as the best prominent NO control technique. Three, V-W-Ti-catalysts (V1W9Ti90, Co0.01V0.99W9Ti90, Ce0.01V0.99W9Ti90) were prepared by wet impregnation method with and without promoter (Co or Ce) in a minute amount. The catalysts were characterized by various technics such as XRD, SEM, and EDX. The influence of promoters and reductants (NH3, LPG, H2-LPG) was investigated for NO reduction over the SCR catalysts. The catalyst activity was evaluated in tubular flow reactor under the following experimental conditions: catalyst = 200mg, NO = 500ppm, O2=8%, NH3= 1.0% in Ar, GHSV =30,000 h−1.The inlet and outlet gases of the reactor were analyzed by NOx chemiluminescence and online GC. The catalyst activity was dependent on the reductants and promoters used. The catalyst, Co0.01V0.99W9Ti90 exhibited the best activity of 99.8% NO reduction at 310 °C with H2-LPG reductant. The activity order of the catalyst is as follows: Co0.01V0.99W9Ti90 > Ce0.01V0.99W9Ti90 > V1W9Ti90. The performance order of the reductants is as follows: H2-LPG>LPG>NH3.
