Liquefaction of subbituminous coals under apparently non-hydrogenative conditions

Isao Mochida, Kenjiro Iwamoto, Tsutomu Tahara, Yozo Korai, Hiroshi Fujitsu, Kenjiro Takeshita

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


Reactivities of several coals of different ranks have been examined in degrading extractions with aromatic solvents under apparently non-hydrogenative reaction conditions. Pyrene and A240 pitch liquefied the fusible coals in high yields and the slightly-fusible coals in moderate yields, indicating the importance of fusibility in such liquefaction processes. A240-LS pitch is a powerful solvent for slightly-fusible coals. Considerable amounts of pyridine- or THF-soluble fractions were produced especially with A240-LS pitch. A240 pitch is a better solvent than pyrene for some slightly-fusible coals. However, the extent of depolymerization of liquefied coal, pyridine- or THF-solubility, was definitely inferior. Yields of such fractions are higher for lower-rank coals. The mechanism of coal liquefaction under apparently non-hydrogenative conditions is discussed with emphasis on the stabilization of thermal fragments derived from the coal.

Original languageEnglish
Pages (from-to)603-609
Number of pages7
Issue number7
Publication statusPublished - Jul 1982

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry


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