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 O2 and chemical looping oxidative dehydrogenation has been investigated with the oxygen storage oxide compound. LaMnO3 perovskite catalysts with large specific surface areas were prepared using citric acid-nitrate combustion. The oxygen vacancies and M4+ contents in the catalysts were improved by doping LaMnO3 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 CH. The catalyst exhibits good stability in oxidative dehydrogenation reaction. Oxygen vacancies and Mn4+ contents in manganese perovskite promotes ethane conversion through selective hydrogen combustion and activation of CH. [Display omitted] •Citric acid-nitrate combustion method synthesizes large surface area perovskite•Doping Sr and Cl enhanced the oxygen vacancies and Mn4+ contents in LaMnO3.•Chemical loop oxidative dehydrogenation activity was investigated in presence/absence of O2.•Manganese perovskite promotes ethane conversion through selective hydrogen combustion and activation of CH.