Coal hydroliquefaction using MoCl3- and NiCl2-containing salts as catalysts: difference in catalysis between solid and molten catalysts

Chunshan Song, Masakatsu Nomura, Mikio Miyake

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21 Scopus citations


Both MoCl3- and NiCl2-LiCl-NaCl-KCl quaternary solid salts and both MoCl3- and NiCl2-LiCl-KCl ternarly molten salts were examined as catalysts for hydroliquefaction of subbituminous Wandoan coal at 400 °C for 1 h in a batch reactor with an initial H2 pressure of 9.8 M Pa. Conversions (to pyridine solubles) and yields of hexane solubles (HS) ranged from 80 to 92 wt% and from 55 to 65 wt%, respectively. The results suggested that both solid and molten catalysts are highly effective for hydrocracking of coal, with the latter being superior in terms of conversion and HS yield. H2 consumption of the reaction suggested that the hydrogenating ability of the catalysts decreases in the following order: NiCl2 (molten) > MoCl3 (molten) > MoCl3 (solid) > NiCl2 (solid). Cracking ability of these catalysts decreases in the order: MoCl3 (molten) > MoCl3 (solid) > NiCl2 (molten) > NiCl2 (solid). It was tentatively concluded that the molten catalysts have higher hydrogenating and cracking abilities for coal hydroliquefaction than the corresponding solid ones.

Original languageEnglish (US)
Pages (from-to)922-926
Number of pages5
Issue number7
StatePublished - Jul 1986

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

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