Kinetic compensation during homogeneous and heterogeneous nucleation of ice in aqueous systems

Abstract

Homogeneous and heterogeneous nucleation rates of ice in aqueous systems are described in the literature with the equation J = A exp (B τ). There are a very large number of published data available for variation of the constants A and B with experimental conditions. Results of this study show that the parameters obtained in the experiments with differential scanning calorimeter and the microscopic technique may be described separately with an empirical compensation equation of the form ln A = aB + b. The compensation equation may be used to predict the nucleation rates in design of the freezing processes. In such a design the parameters A and B are required to be evaluated under the exact experimental conditions which may not always be possible. The compensation equation may be helpful for the interpolation of experimental data when there is no information available for the specific design conditions. © 1994 Academic Press.