Molecular diffusion coefficients of phenylmethanol,1-phenylethanol,2-phenylethanol,2-phenyl-1-propanol,and 3-phenyl-1-propanol in supercritical carbon dioxide

摘要

The Taylor-Aris chromatographic technique was employed for the determination of the diffusion coefficients of phenylmethanol,1-phenylethanol,2-phenylethanol,2-phenyl-1-propanol,and 3-phenyl-1-propanol at infinite dilution in supercritical carbon dioxide from 313.16 to 333.16 K and pressures between 15.0 and 35.0 MPa.Diffusivities were correlated with temperature,pressure,solvent density and solvent viscosity,and 12 predictive equations were compared with experimental data:Wilke-Chang,Lusis-Ratcliff,Tyn-Calus,Kooijman,Lai-Tan,Catchpole-King,Eaton-Akgerman,He,He-Yu,Liu-Silva-Macedo,Dariva-Coelho-Oliveira,and Rah-Kwak-Eu-Laffleur.Considerations regarding the diffusion coefficients of the isomers were also made.