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<p>Low-temperature catalytic hydrolysis of carbonyl sulfide (COS) is a key step for the efficient desulfurization of blast furnace gas. COS hydrolysis catalysts were prepared via a co-impregnation method, and the effects of metal oxide type, doping amount, and calcination conditions on COS hydrolysis and desulfurization performance were systematically investigated. Among the prepared catalysts, the Fe/Ce co-doped catalyst exhibited superior catalytic activity, maintaining a desulfurization rate above 90% for 240&#xa0;min with a penetrating sulfur capacity of 9.95&#xa0;mg/g. When the CeO<sub>2</sub> doping amount increased from 1% to 5%, the catalytic performance first improved and then declined, reaching the optimum at 3% with a high-activity duration of 680 min and a penetrating sulfur capacity of 28.39&#xa0;mg/g. Further optimization of calcination conditions (450&#xa0;°C for 2&#xa0;h) extended the high-activity duration to 740&#xa0;min and increased the sulfur capacity to 30.88&#xa0;mg/g. Characterization results of Brunauer–Emmett–Teller method, X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy reveal that the synergistic interaction between Fe and Ce species promotes H<sub>2</sub>O dissociation, facilitates Fe<sub>2</sub>O<sub>3</sub> regeneration, and enhances sulfate formation, thereby improving both catalytic efficiency and sustainability in COS hydrolysis.</p>

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Fe/Ce co-doped activated carbon catalyst for low-temperature carbonyl sulfide hydrolysis in blast furnace gas: synergistic mechanisms and sustainable desulfurization performance

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • Hao Huang,
  • Chun-Long Fan,
  • Hong-Tao Wang,
  • Cheng Pan,
  • Bei-Bei Chen,
  • Hong-Ming Long

摘要

Low-temperature catalytic hydrolysis of carbonyl sulfide (COS) is a key step for the efficient desulfurization of blast furnace gas. COS hydrolysis catalysts were prepared via a co-impregnation method, and the effects of metal oxide type, doping amount, and calcination conditions on COS hydrolysis and desulfurization performance were systematically investigated. Among the prepared catalysts, the Fe/Ce co-doped catalyst exhibited superior catalytic activity, maintaining a desulfurization rate above 90% for 240 min with a penetrating sulfur capacity of 9.95 mg/g. When the CeO2 doping amount increased from 1% to 5%, the catalytic performance first improved and then declined, reaching the optimum at 3% with a high-activity duration of 680 min and a penetrating sulfur capacity of 28.39 mg/g. Further optimization of calcination conditions (450 °C for 2 h) extended the high-activity duration to 740 min and increased the sulfur capacity to 30.88 mg/g. Characterization results of Brunauer–Emmett–Teller method, X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy reveal that the synergistic interaction between Fe and Ce species promotes H2O dissociation, facilitates Fe2O3 regeneration, and enhances sulfate formation, thereby improving both catalytic efficiency and sustainability in COS hydrolysis.