The role of modified manganese perovskite oxide for selective oxidative dehydrogenation of ethane: Not only selective H2 combustion but also ethane activation

To break through the thermodynamic reaction limitation of ethane dehydrogenation to ethylene, the oxidative dehydrogenation in the presence of O 2 and chemical looping oxidative dehydrogenation has been investigated with the oxygen storage oxide compound. LaMnO 3 perovskite catalysts with large specific surface areas were prepared using citric acid-nitrate combustion. The oxygen vacancies and M 4+ contents in the catalysts were improved by doping LaMnO 3 as the active sites. The experimental results show that the catalyst not only promotes ethane dehydrogenation through selective hydrogen combustion but also promotes ethane conversion through activation of C H. The catalyst exhibits good stability in oxidative dehydrogenation reaction. Oxygen vacancies and Mn 4+ contents in manganese perovskite promotes ethane conversion through selective hydrogen combustion and activation of C H. • Citric acid-nitrate combustion method synthesizes large surface area perovskite • Doping Sr and Cl enhanced the oxygen vacancies and Mn 4+ contents in LaMnO 3 . • Chemical loop oxidative dehydrogenation activity was investigated in presence/absence of O 2 . • Manganese perovskite promotes ethane conversion through selective hydrogen combustion and activation of C H.