Electrochemical oxidative dehydrogenation of propane to propylene in an oxygen-ion conducting solid oxide electrolyzer

Abstract

Oxidative dehydrogenation of propane to propylene is a feasible and promising route to meet the requirement for propylene production. This paper reports a new method of electrochemical dehydrogenation of propane at the anode while reducing carbon dioxide in a solid oxide cell at 700 °C using perovskite (La_0.3Sr_0.7)_1−x(Ti_0.85Mn_0.15)_1−xNi_xO_3+δ as the electrode material. Manganese doping is utilized to regulate the concentration of oxygen vacancies and in situ precipitation of nickel nanoparticles to establish metal-oxide interfacial active sites. This improves propane electrolytic properties and the catalyst's anti-coking properties through oxygen ion conduction. With symmetric cells, using (La_0.3Sr_0.7)_1−x(Ti_0.85Mn_0.15)_1−xNi_xO_3+δ as electrodes can achieve propane conversions of up to 37.07% and a propylene yield of 13.92%.