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<p>Polymetallic Mo–Ni, Mo–Co, and Mo–Ni–Co catalysts were prepared by gravity-assisted SHS metallurgy followed by alkali leaching of aluminum from intermetallic precursors. The catalysts were characterized by XRD, SEM/EDS, H<sub>2</sub>-TPR, FTIR, and nitrogen sorption method and tested in CO<sub>2</sub> hydrogenation under normal and enhanced pressure. Conversion of CO<sub>2</sub> to CO, CH<sub>4</sub> and higher hydrocarbons is ruled by catalyst nature, temperature, pressure, and H<sub>2</sub> to CO<sub>2</sub> molar ratio in feed gas. Ni-containing catalysts convert CO<sub>2</sub> to CH<sub>4</sub> selectively at 200–350&#xa0;°C under atmospheric pressure. Mo–Co and Mo–Ni–Co catalysts provide high selectivity to liquid hydrocarbons (yield up to 27% on CO<sub>2</sub> passed) which are 100% paraffinic with low yield of methane at enhanced pressure.</p>

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Mo-Ni-Co Catalysts Produced by Self-Propagatinng High-Temperature Synthesis for Highly Efficient CO2 Hydrogenation to Methane and Higher Hydrocarbons

  • 期刊论文

  • 发表日期：

    2026年4月11日

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  • Elena V. Pugacheva,
  • Svetlana Ya. Zhuk,
  • Ruslan V. Kazantsev,
  • Yury A. Agafonov,
  • Dmitrii E. Andreev,
  • Natalia Yu. Khomenko,
  • Yury M. Shulga,
  • Oleg L. Eliseev,
  • Olga A. Golosova,
  • Vyacheslav N. Borshch

摘要

Polymetallic Mo–Ni, Mo–Co, and Mo–Ni–Co catalysts were prepared by gravity-assisted SHS metallurgy followed by alkali leaching of aluminum from intermetallic precursors. The catalysts were characterized by XRD, SEM/EDS, H2-TPR, FTIR, and nitrogen sorption method and tested in CO2 hydrogenation under normal and enhanced pressure. Conversion of CO2 to CO, CH4 and higher hydrocarbons is ruled by catalyst nature, temperature, pressure, and H2 to CO2 molar ratio in feed gas. Ni-containing catalysts convert CO2 to CH4 selectively at 200–350 °C under atmospheric pressure. Mo–Co and Mo–Ni–Co catalysts provide high selectivity to liquid hydrocarbons (yield up to 27% on CO2 passed) which are 100% paraffinic with low yield of methane at enhanced pressure.