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<p>A variety of catalysts were prepared to investigate the effects of active metals and phosphorous on hydrodemetallation (HDM) and hydrodesulfurization (HDS) of a typical medium-temperature coal tar from Xinjiang in China. A dispersant is used to improve the dispersion of active components on the surface of the support compared with the catalysts without dispersant. The hydrodemetallation products of the autoclave under mild conditions were characterized by inductive coupled plasma emission spectrometer (ICP) and microcoulometer. The difficulty of metal removal is as follows: Mg&gt; Na&gt; Al&gt; Ca&gt; Fe. The combination of H<sub>3</sub>PO<sub>4</sub>, (NH4) 6Mo7O24·4H2O, and Ni(NO3) 2·6H2O precursors generated more type II “Ni-Mo-S” active phases, with the highest catalytic activity. The XPS characterization revealed that phosphorus and PVP addition modulated metal-support interactions, promoted the formation of highly dispersed NiMoS active phases, and increased the sulfidation degree of Mo species, which contributed to the enhanced HDM activity. The hydrogenation desulfurization and hydrogenation demetallation occur at the same active site. The catalyst showed good stability within 168 h.</p>

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Catalysts for demetallation of low-temperature coal tar

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月1日

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  • Bowen Ma,
  • Jiaqing Song,
  • Yuhui Guo,
  • Yuan Zhao,
  • Bin An

摘要

A variety of catalysts were prepared to investigate the effects of active metals and phosphorous on hydrodemetallation (HDM) and hydrodesulfurization (HDS) of a typical medium-temperature coal tar from Xinjiang in China. A dispersant is used to improve the dispersion of active components on the surface of the support compared with the catalysts without dispersant. The hydrodemetallation products of the autoclave under mild conditions were characterized by inductive coupled plasma emission spectrometer (ICP) and microcoulometer. The difficulty of metal removal is as follows: Mg> Na> Al> Ca> Fe. The combination of H3PO4, (NH4) 6Mo7O24·4H2O, and Ni(NO3) 2·6H2O precursors generated more type II “Ni-Mo-S” active phases, with the highest catalytic activity. The XPS characterization revealed that phosphorus and PVP addition modulated metal-support interactions, promoted the formation of highly dispersed NiMoS active phases, and increased the sulfidation degree of Mo species, which contributed to the enhanced HDM activity. The hydrogenation desulfurization and hydrogenation demetallation occur at the same active site. The catalyst showed good stability within 168 h.