An overview of solid-liquid separation of residues from coal liquefaction processes

S. Khare, Mark Dell'Amico

Research output: Contribution to journalArticlepeer-review

23 Citations (SciVal)


Direct coal liquefaction process typically produces mixed oils (60%) and gases (15%). The remainder is a high-boiling viscous residue that contains oils, asphaltenes, unreacted coal, mineral matter and potentially valuable liquefaction catalyst. Effective separation of the components of the residue stream is important to the economic and environmental performance of the process. Solid-liquid separation technologies, such as filtration, hydrocyclones, centrifugation, critical solvent deashing and distillation have been reviewed in relation to their use in coal liquefaction processes. Individual operations used have not been completely satisfactory, and a better overall result is obtained when they are used in combination.

Original languageEnglish
Pages (from-to)324-331
Number of pages8
JournalCanadian Journal of Chemical Engineering
Issue number2
Publication statusPublished - Feb 2013


  • Coal liquefaction residue
  • Hydrocyclones
  • Solid-liquid separation

ASJC Scopus subject areas

  • General Chemical Engineering


Dive into the research topics of 'An overview of solid-liquid separation of residues from coal liquefaction processes'. Together they form a unique fingerprint.

Cite this