Effectively promote catalytic performance by adjusting W/Fe molar ratio of FeWx/Ce0.68Zr0.32O2 monolithic catalyst for NH3-SCR

FeWx/Ce0.68Zr0.32O2 (x = 0, 0.35, 0.7, 1.03, 1.38) catalysts with different molar ratios (x) of W/Fe were prepared for NH3-SCR. The experimental results showed that catalytic performances of catalysts were obviously improved by adjusting the molar ratio of W/Fe. FeW1.03/Ce0.68Zr0.32O2 catalyst with W/Fe of 1.03 displayed the best catalytic performance, it could obtain higher than 95% NOx, conversion and nearly 100% N-2 selectivity in the temperature range of 250-435 degrees C. The characterization results indicated that more active species of Fe3+, chemical adsorbed oxygen species and surface acid sites would together contribute to the excellent NH3-SCR performance of FeW1.03/Ce0.68Zr0.32O2 catalyst. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.