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An overview of solid–liquid separation of residues from coal liquefaction processes
Author(s) -
Khare S.,
Dell'Amico M.
Publication year - 2013
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.21647
Subject(s) - liquefaction , coal liquefaction , asphaltene , coal , distillation , boiling , chemistry , residue (chemistry) , waste management , filtration (mathematics) , separation process , chemical engineering , environmental science , chromatography , organic chemistry , engineering , statistics , mathematics
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. © 2012 Canadian Society for Chemical Engineering