Prediction of diffusion coefficients of carbon dioxide in water and in aqueous electrolytic solution

Abstract

An empirical correlation given by (formula omitted) is proposed for predicting binary/pseudo binary diffusion coefficients of carbon dioxide in water and in aqueous electrolytic solutions, where D12 is diffusion coefficient [m2/s], T is temperature [K], and η is viscosity [Pa s]. The average absolute deviation AAD for this correlation is 5.6% for the literature data on D12 of CO2 in water with number of data points N of 79 and 3.9% (N=103) for those in aqueous electrolytic solutions. The above correlation obtained in this study is more accurate than the various empirical correlations proposed in the literature. © 1995, The Society of Chemical Engineers, Japan. All rights reserved.