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<p>Oxidative propane dehydrogenation (OPDH) has emerged as a promising approach for direct propylene production. However, it still confronts great challenge of overoxidation of propane to CO<sub><i>x</i></sub>, damaging the products selectivity. Herein, we report an electrically-driven continuous chemical looping process to efficiently produce propylene via an electrochemical CO<sub>2</sub>-OPDH system within solid oxide electrolysis cells (SOECs). At an optimal current density of 10 mA cm<sup>−2</sup>, the system with a Co<sub>3</sub>O<sub>4</sub>-modified La<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.2</sub>Fe<sub>0.8</sub>O<sub>3-δ</sub> (LSCF) anode achieves 92.6% olefin selectivity and 14.2% single-pass propane conversion. This current-driven configuration boosts the propylene yield (5.11 mmol g<sub>total</sub><sup>−1</sup> h<sup>−1</sup>) by a factor of 18.5 over the open-circuit baseline. The electrochemical CO<sub>2</sub>-ODHP system also exhibits good stability during a 120-hour durability test. In-situ characterization and theoretical calculations elucidate the electrically driven online replenishment mechanism of Co<sub>3</sub>O<sub>4</sub> lattice oxygen by O<sup>2-</sup> derived from cathode CO<sub>2</sub> reduction. This dynamic cycle maintains moderate anode surface oxygen activity, resulting in highly efficient and selective OPDH without significant over-oxidation or cracking of propane.</p>

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Achieving enhanced and robust propane selective oxidative dehydrogenation via electrically-driven continuous chemical looping

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月27日

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  • Shihui Zhang,
  • Chang-An Zhou,
  • Jinhuang Cai,
  • Hongjiao Li,
  • Tao Liu,
  • Qiang Hu,
  • Chao Wang,
  • Lei Song,
  • Jiawei Xie,
  • Lirong Zheng,
  • Bin Liang,
  • Hairong Yue,
  • Kui Ma

摘要

Oxidative propane dehydrogenation (OPDH) has emerged as a promising approach for direct propylene production. However, it still confronts great challenge of overoxidation of propane to COx, damaging the products selectivity. Herein, we report an electrically-driven continuous chemical looping process to efficiently produce propylene via an electrochemical CO2-OPDH system within solid oxide electrolysis cells (SOECs). At an optimal current density of 10 mA cm−2, the system with a Co3O4-modified La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) anode achieves 92.6% olefin selectivity and 14.2% single-pass propane conversion. This current-driven configuration boosts the propylene yield (5.11 mmol gtotal−1 h−1) by a factor of 18.5 over the open-circuit baseline. The electrochemical CO2-ODHP system also exhibits good stability during a 120-hour durability test. In-situ characterization and theoretical calculations elucidate the electrically driven online replenishment mechanism of Co3O4 lattice oxygen by O2- derived from cathode CO2 reduction. This dynamic cycle maintains moderate anode surface oxygen activity, resulting in highly efficient and selective OPDH without significant over-oxidation or cracking of propane.