Viscosity of coal-derived liquids

A coal-derived liquid was separated into toluene insolubles, asphaltene and pentane soluble oil by conventional solvent analysis. The asphaltene was separated further into an acid-neutral and a basic component by a previously reported procedure from our laboratory. The viscosities of liquids reconst...

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Bibliographic Details
Published in:Fuel processing technology 1978-01, Vol.1 (3), p.217-226
Main Authors: Bockrath, Bradley C., LaCount, Robert B., Noceti, Richard P.
Format: Article
Language:English
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Summary:A coal-derived liquid was separated into toluene insolubles, asphaltene and pentane soluble oil by conventional solvent analysis. The asphaltene was separated further into an acid-neutral and a basic component by a previously reported procedure from our laboratory. The viscosities of liquids reconstituted from toluene insolubles, asphaltenes, acid-neutral asphaltene or basic asphaltene in the pentane soluble oil were determined. The logarithm of the viscosity ratio is a linear function of concentration for each of the solutes. On a weight basis, the toluene insolubles produce about twice the viscosity as the asphaltenes. The viscosity of mixtures of acid-neutral and basic asphaltene in pentane soluble oil is greater than either component determined separately, presumably due to complex formation. The variation of the reduced specific viscosity with concentration indicates that aggregation of the asphaltene and toluene insoluble fractions plays a significant role in the viscosity of coal-derived liquids.
ISSN:0378-3820
1873-7188
DOI:10.1016/0378-3820(78)90020-6