سال انتشار: ۱۳۸۶
محل انتشار: دومین کنفرانس احتراق ایران
تعداد صفحات: ۸
Bahman Seyfi – M.Sc.Student of Chemical Engineering، Department of Chemical and Petroleum Engineering,Sharif University of Technology,Tehran,Iran
Morteza Baghalha – Assistant Professor of Chemical Engineering، Department of Chemical and Petroleum Engineering,Sharif University of Technology,Tehran,Iran
Modified perovskite-type oxides were synthesized based on two different methods,namely co-precipitation and conventional citrate.The synthesized perovskite materials had the nominal composition s of LaCoO3,LaCo0.8Cu0.2O3,La0.8Sr0.2Co0.8Cu0.2O3,La0.8M0.2Fe0.8O3 (where M =Ce and Sr).The catalytic activity of perovskite samples toward CO combustion were measured using a gas mixture containing N2/O2/CO in the following proportions 97/1/2.The prepared perovskite samples were characterized by SEM,nitrogen adsorption (BET),XRF and XRD analyses.All the catalysts displayed good stability above 600°C and a high activity toward CO combustion.Our novel proposed perovskite composition,namely La0.8Sr0.2Co0.8Cu0.2O3 showed the highest activity for achieving CO conversion above 80%.While homogeneous gas-phase combustion of CO requires temperatures in excess of 700°C to achieve fair kinetics,our novel catalyst sample achieved 100%CO combustion at 355°C.