Abstract
The liquid phase heat capacities of narrow-boiling-range distillates from coal liquefaction products were predicted using group contribution, corresponding states and curve-fitting procedures. These predictions were compared to experimentally determined values. The results indicate that the accuracy of the correlations can be ranked in the following order: group contribution > curve fits > corresponding states. The success of the group contribution approach can be attributed to the structural information that is incorporated into the correlation. Using the group contribution method, one can estimate liquid heat capacities of the narrow-boiling range distillates with an overall accuracy of 8% using data from only 1H n.m.r. and elemental analysis.
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