The thermal conductivities of ten pure liquid alcohols and four of their binary mixtures were measured by use of the relative horizontal parallel-plate method (steady-state type) under atmospheric pressures Measurements for pure alcohols were carried out at temperatures from 20 to 70°C and for binary mixtures at 25.0 and 50.0°C.
A previous correlation model developed for the thermal conductivities of nonpolar liquids on the basis of the lattice model coupled with the hole theory concept has been successfully extended to polar liquids such as alcohols by the introduction of a new empirical parameter to represent the polar effect. Reduced values of the potential parameters and the empirical parameter, needed in the calculation of thermal conductivities, could be correlated by quadratic functions of Pitzer''s acentric factor and Stiel''s polar factor. The present model is also extended to alcohol mixtures by use of binary interaction parameters.
The Society of Chemical Engineers, Japan