PREDICTIVE CORRELATION FOR BINARY DIFFUSION-COEFFICIENTS IN DENSE CARBON-DIOXIDE

Binary diffusion coefficients of some organic compounds in carbon dioxide at 313.2 K and 16.0/25.0 MPa were measured by using the Taylor-Aris tracer response technique. We propose a new correlation of Schmidt numbers as a function of solvent molar volumes for predicting binary diffusion coefficients in dense CO2 and self-diffusion coefficients of dense CO2. The correlation was also found to be valid for predicting self-diffusion coefficients of dense CH4 at F(v)/A*<40 or v2/(v2)0>1.62.