Mutual Diffusion Coefficients of Benzene in Supercritical Carbon Dioxide.

Impulse response techniques to measure binary diffusion coefficients under supercritical conditions

“…The Taylor dispersion method has also been employed to study diffusion in the near critical region, where some studies report anomalous decreases experimentally [16][17][18][19]. We also observed a decrease [20], but could not conclude that these are due to the critical phenomena.…”

“…5. D 12 /T vs. CO 2 viscosity for the D 12 data (᭺) of benzene in SC CO 2 at 239 nm by Funazukuri et al [20] and literature data (ଝ) Swaid and Schneider [3]; (᭢) Sassiat et al [30]; (᭡) Bueno et al [31]; ( ) Levelt Sengers et al [21]; (᭹) Funazukuri and Nishimoto [32]; (+) Ago and Nishiumi [18]). From ref.…”

“…(1) In carbon dioxide by the Taylor dispersion method [3,[16][17][18][19][20][21]24,25,27,28,[30][31][32][33]47,51,52,55,56,58,60,64,[66][67][68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85]. (2) In carbon dioxide by the modified Taylor dispersion method [13].…”

“…The data at 239 nm can be represented by a straight line (solid), while the data obtained at 254 and 253 nm are straight lines with values lower by 6.7% (broken-dotted) and 10% (broken), respectively.Fig. 5[20] is a comparison of D 12 /T versus carbon dioxide viscosity for D 12 data of benzene in SC carbon dioxide at 239 nm[20] with data reported in the literature[3,18,21,[30][31][32], using the Taylor dispersion technique. D 12Fig.…”

Direct calculation of mutual diffusion coefficients of binary system using non-equilibrium molecular dynamics simulation

“…Many data of mutual diffusion coefficients for binary system have been reported in the single phase region. The mutual diffusion coefficients are known to have anomalous concentration dependence in the vicinity of critical point of vapor-liquid equilibria (VLE) and at supercritical conditions [1][2][3][4][5][6][7][8]. Such anomalous behavior may appear by the chemical potential (activity and fugacity) gradient which can be represented by a thermodynamic factor [9][10][11][12].…”