Journal
FUEL
Volume 327, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2022.125210
Keywords
Ethane; Ethylene; BaCoO3; Perovskite; Chemical looping; Oxidative dehydrogenation
Categories
Funding
- National Natural Science Foundation of China [51876014, 52006019]
- China Postdoctoral Science Foundation [2020M673132]
- Venture & Innovation Support Program for Chongqing Overseas Returnees
- Open fund of Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Chongqing University [LLEUTS-2021003]
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In this study, a potential route for selective and efficient ethylene production via chemical looping oxidative dehydrogenation of ethane using alkaline, rare earth, and transition metals modified BaCoO3 perovskite as the circulative redox catalyst was reported. The results showed that ethane conversion and ethylene selectivity were mainly regulated by lattice oxygen and Co valence of the catalysts, respectively. Co-doping of La and Cu to A/B-site of BaCoO3 enhanced both ethane conversion and ethylene selectivity, achieving the highest selectivity of 81.2% at ethane conversion of 67.6%.
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 BaCoO3 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 BaCoO3 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 BaCoO3, obtaining the highest selectivity of 81.2% at ethane conversion of 67.6%. The ethylene yield over Ba0.7La0.3Co0.8Cu0.2O3 was 7.9% higher than that over patent BaCoO3 (53.7% versus 45.8%). In addition, the Ba0.7La0.3Co0.8Cu0.2O3 catalyst also exhibited a stable catalytic performance during 12 redox recycles.
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