Effect of selenium containing nanoparticle addition on copper-based SCR catalyst on NOx conversion performance at low temperature conditions

In this study, Cu(%3) /TiO2, Cu-Ca(%4) /TiO2, Cu-Ca-Se (%4,5) /TiO2, Cu-Ca-Se (%5)/TiO2, Cu-Ca-Se(%5,5)/TiO2 catalysts were produced by using impregnation method for hydrocarbon-selective catalytic reduction (HC-SCR) system. In this system, as a reducing agent ethyl alcohol was used. The NOX conversion efficiency of the system with using synthesized catalyst was analyzed. Chemical and structural properties of the used catalyst were examined by SEM, BET and XRD analysis. In the SCR test system, the experiments were conducted in different temperatures ranged from 180 0C to 270 0C in constant gas hourly space velocity GHSV (30000 h-1). The tests were done by using 2 cylinders, V-type diesel engine with constant speed (3000 rev/m) in 3 different loads (1 kW, 3 kW and 5 kW). These tests identified the effects of synthesized SCR catalyst on NOX conversion rate. In result, maximum NOX conversion rates were measured in 5 kW load, at 270 0C, GHSV= 30000 h-1, NOX conversion rate was reached approximately to % 94,88 which is the highest point.