Transport processes in compressed liquid methanol

The self‐diffusion coefficient of liquid methanol–OD has been measured as a function of temperature and pressure over the density range ∼0.8–1.0 g cm−3 and the temperature range 223 – 323°K using the NMR spin‐echo technique. The shear viscosities and densities have also been determined under the same experimental conditions. The diffusion data are interpreted in terms of a model based on the modified smooth hard sphere theory corrected for the effects of hydrogen bonding. The reduction of the smooth hard sphere self‐diffusion coefficient DSHS as a result of hydrogen bonding is expressed in terms of the parameter αHB. The strongly temperature dependent parameter αHB correlates well with the extent of hydrogen bonding as estimated from the proton NMR chemical shift studies. The Stokes–Einstein relation is found to be valid at the molecular level for liquid CH3OD. Increases in both the density and temperature cause the value of Dησ/kT to a shift from the sticking boundary condition towards the slipping bound...

[1]  T. DeFries,et al.  Pressure dependence of NMR proton spin–lattice relaxation times and shear viscosity in liquid water in the temperature range −15–10 °C , 1977 .

[2]  M. Fury,et al.  Density and temperature dependence of self‐diffusion and shear viscosity of perfluorocyclobutane in the dense fluid region , 1977 .

[3]  J. Dymond.  A modified hard-sphere theory for transport properties of fluids over the whole density range: I. Viscosity coefficients of low molecular weight hydrocarbons , 1976 .

[4]  D. J. Wilbur,et al.  Self‐diffusion in compressed liquid heavy water , 1976 .

[5]  D. J. Wilbur,et al.  Molecular motions in compressed liquid water , 1976 .

[6]  R. Mills.  Diffusion relations in the binary system benzene-perdeuteriobenzene at 25.degree.C , 1976 .

[7]  J. Jonas,et al.  Density and temperature effects on motional dynamics of SF6 in the supercritical dense fluid region , 1975 .

[8]  J. Jonas,et al.  Dense liquids. II. The effect of density and temperature on viscosity of tetramethylsilane and benzene , 1975 .

[9]  D. Chandler.  Rough hard sphere theory of the self‐diffusion constant for molecular liquids , 1975 .

[10]  H. S. Sandhu.  Coefficient of self-diffusion in liquids using pulsed NMR techniques , 1975 .

[11]  J. Dymond.  Corrected Enskog theory and the transport coefficients of liquids , 1974 .

[12]  J. Lascombe.  Molecular Motions in Liquids , 1974 .

[13]  J. Waugh,et al.  Advances In Magnetic Resonance , 1974 .

[14]  Y. Sadaoka,et al.  Temperature Dependence of Association of Methanol, Ethanol, and 1-Propanol , 1973 .

[15]  E. Wilhelm.  On the temperature dependence of the effective hard sphere diameter , 1973 .

[16]  Y. Lee,et al.  Density Effects on the Dynamic Structure of Liquid Deuterium Oxide , 1972 .

[17]  J. Jonas.  Nuclear Magnetic Resonance Measurements at High Pressure , 1972 .

[18]  B. Alder,et al.  Studies in Molecular Dynamics. VIII. The Transport Coefficients for a Hard-Sphere Fluid , 1970 .

[19]  S. Sandler,et al.  Transport Properties of Polyatomic Fluids. II. A Dilute Gas of Spherocylinders , 1966 .

[20]  M. Zeidler.  Umorientierungszeiten, Sprungzeiten und Quadrupolkopplungskonstanten in einigen organischen Flüssigkeiten aus kernmagnetischen Relaxationszeitmessungen , 1965 .

[21]  R. Rathbun,et al.  SELF-DIFFUSION IN LIQUIDS. III. TEMPERATURE DEPENDENCE IN PURE LIQUIDS1 , 1961 .

[22]  M. Saunders,et al.  Hydrogen Bonded Species in Alcohols , 1959 .

[23]  M. Saunders,et al.  Trimeric Association of t‐Butanol by NMR , 1958 .