Estimation
of Pure-Component Properties of Biodiesel-Related
Components: Fatty Acid Methyl Esters, Fatty Acids, and Triglycerides
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Abstract
Common group-contribution and corresponding-state
models for the
estimation of normal boiling points, vapor pressures, liquid densities,
and dynamic viscosities are reviewed in view of their application
to fatty acid methyl esters, related fatty acids and triglycerides.
Because of the limited representation of measured data for triglycerides,
three previously published group-contribution models for normal boiling
points, vapor pressures, and dynamic viscosities are extended through
the introduction of a new group, representing the backbone structure
common to all triglycerides and improving the performance of these
models significantly. Conclusions are drawn in view of further refinement
of the group-contribution approach for application to complex branched
molecules