Scholarlink

<p>Ethylene (C<sub>2</sub>H<sub>4</sub>) is conventionally produced by a high energy-consumption process based on the steam cracking of ethane (C<sub>2</sub>H<sub>6</sub>). In contrast, we presented a novel symmetrical solid oxide fuel cell (SOFC) to co-produce electricity and C<sub>2</sub>H<sub>4</sub> through C<sub>2</sub>H<sub>6</sub> dehydrogenation. The symmetrical cell contains a thin BaZr<sub>0.1</sub>Ce<sub>0.7</sub>Y<sub>0.2</sub>O<sub>3</sub> (BZCY) electrolyte sandwiched between two thicker (PrBa)<sub>0.95</sub>(Fe<sub>0.7</sub>Ni<sub>0.2</sub>Cu<sub>0.1</sub>)<sub>1.8</sub>Mo<sub>0.2</sub>O<sub>6-<i>δ</i></sub> impregnated BZCY (PBFNCM-BZCY) electrodes. The as-synthesized reduced-PBFNCM (R-PBFNCM) contained Fe–Ni–Cu alloy particles embedded on a double-perovskite matrix uniformly, while the electrode showed high oxygen vacancy concentration, electronic conductivity, redox stability, and activity for C<sub>2</sub>H<sub>6</sub> dehydrogenation with improved ethylene selectivity. The symmetrical cell demonstrated a peak power density of 409&#xa0;mW&#xa0;cm<sup>−2</sup> using C<sub>2</sub>H<sub>6</sub> as fuel, accompanying with a C<sub>2</sub>H<sub>6</sub> conversion of 51.2%, a C<sub>2</sub>H<sub>4</sub> selectivity of 92.5%, and a C<sub>2</sub>H<sub>4</sub> yield of 47.4% at 750&#xa0;°C and 750&#xa0;mA&#xa0;cm<sup>−2</sup>. Despite carbon deposition occurred slowly in the anode, the deposited carbon was removed by simply switching C<sub>2</sub>H<sub>6</sub> and air between electrodes. Consequently, the cell voltage and C<sub>2</sub>H<sub>4</sub> yield recover by 91.4% and 98.1%, respectively, after three switches with an interval of 48&#xa0;h, suggesting that the symmetrical SOFC is a promising solution for long-term continuous electricity and C<sub>2</sub>H<sub>4</sub> co-production by C<sub>2</sub>H<sub>6</sub> dehydrogenation.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A novel symmetrical SOFC with thin BZCY electrolyte and PBFNCM-BZCY electrodes for electricity and ethylene co-production through ethane dehydrogenation

  • 期刊论文

  • 发表日期：

    2025年5月9日

查看全文
  • Jun Luo,
  • Yan-Dong Ke,
  • Qi-Yue Li,
  • Ying-Fa Tian,
  • Bing-Hai Dong,
  • Dong Yan,
  • Jian Li,
  • Oi-Lun Li,
  • Li-Chao Jia

摘要

Ethylene (C2H4) is conventionally produced by a high energy-consumption process based on the steam cracking of ethane (C2H6). In contrast, we presented a novel symmetrical solid oxide fuel cell (SOFC) to co-produce electricity and C2H4 through C2H6 dehydrogenation. The symmetrical cell contains a thin BaZr0.1Ce0.7Y0.2O3 (BZCY) electrolyte sandwiched between two thicker (PrBa)0.95(Fe0.7Ni0.2Cu0.1)1.8Mo0.2O6-δ impregnated BZCY (PBFNCM-BZCY) electrodes. The as-synthesized reduced-PBFNCM (R-PBFNCM) contained Fe–Ni–Cu alloy particles embedded on a double-perovskite matrix uniformly, while the electrode showed high oxygen vacancy concentration, electronic conductivity, redox stability, and activity for C2H6 dehydrogenation with improved ethylene selectivity. The symmetrical cell demonstrated a peak power density of 409 mW cm−2 using C2H6 as fuel, accompanying with a C2H6 conversion of 51.2%, a C2H4 selectivity of 92.5%, and a C2H4 yield of 47.4% at 750 °C and 750 mA cm−2. Despite carbon deposition occurred slowly in the anode, the deposited carbon was removed by simply switching C2H6 and air between electrodes. Consequently, the cell voltage and C2H4 yield recover by 91.4% and 98.1%, respectively, after three switches with an interval of 48 h, suggesting that the symmetrical SOFC is a promising solution for long-term continuous electricity and C2H4 co-production by C2H6 dehydrogenation.

Graphical Abstract