Ethylene production over A/B-site doped BaCoO3 perovskite by chemical looping oxidative dehydrogenation of ethane

• CL-ODH of ethane to ethylene was enhanced over A/B-site doped BaCoO 3 perovskite. • O L promoted ethane conversion while high Co 3+ /Co 2+ ratio favored ethylene selectivity. • Ethylene was obtained with the highest selectivity of 81.2% at ethane conversion of 67.6%. • Ba 0.7 La 0.3 Co 0.8 Cu 0.2 O 3 increased ethylene yield by 7.9% compared with patent BaCoO 3 . Ethylene is a valuable and widely used platform in industrial chemical. Herein, we report a potential route for selective and efficient ethylene production via chemical looping oxidative dehydrogenation of ethane using alkaline, rare earth and transition metals modified BaCoO 3 perovskite as the circulative redox catalyst. The catalysts were characterized by XRD, XPS, SEM, TEM, N 2 adsorption-desorption, H 2 -TPR, and O 2 -TPD analyses. Results showed that ethane conversion and ethylene selectivity were mainly regulated by lattice oxygen and Co valence of the catalysts, respectively. Doping of La to A-site of BaCoO 3 promoted ethane conversion while doping of Cu to B-site contributed to ethylene selectivity. Both ethane conversion and ethylene selectivity were enhanced by the co-doping of La and Cu to A/B-site of BaCoO 3 , obtaining the highest selectivity of 81.2% at ethane conversion of 67.6%. The ethylene yield over Ba 0.7 La 0.3 Co 0.8 Cu 0.2 O 3 was 7.9% higher than that over patent BaCoO 3 (53.7% versus 45.8%). In addition, the Ba 0.7 La 0.3 Co 0.8 Cu 0.2 O 3 catalyst also exhibited a stable catalytic performance during 12 redox recycles.