Thermodynamic Consistency Test for Binary Gas + Water Equilibrium Data at Low and High Pressures

High-Pressure Phase Equilibria in an Ethanol/Water Binary System: Experimental Data and Modeling

“…The experimental data at 1500 and 2000 kPa for ethanol/water have been verified following the procedure and by using the thermodynamic relationships suggested in the bibliography. 25,26 As the authors explained in previous papers, the consistency method proposed by the authors can be considered as a modeling procedure 25 because, to check the experimental data consistency, a thermodynamic model that can accurately fit the experimental data must be used. 25,60 Generally, the methods to check the thermodynamic consistency are based on the Gibbs−Duhem equation, which can be applied for both the phases of the homogeneous mixture 27,61 in terms of residual molar properties.…”

“…with ξ i being the concentration of substance i in the liquid or vapor phase and H R being the residual molar enthalpy of the substance i in the mixture. The proposed method [25][26][27]60 to check completely the high pressure data by using eq 15 must be applied regardless of the liquid and vapor phases. 25 Therefore, for this purpose, the PRSV 29,30 EOS, which is one of the most common methods to correlate the properties of the mixtures, is used in eq 15.…”

“…To verify the data consistency, it has been accepted, according to Valderrama−Fauńdez, 25,26 that the selected model (PRSV in this work) is satisfactory if it complies with the condition of MPD, which must be less than 10%, for both the temperature and the vapor-phase composition. This is the reason why the data shown in Table 6 were correlated for the PRSV 29,30 EOS, obtaining the following results: MPD(y 1 ) = 2.27% and MPD(T) = 0.12% for the binary system at 1500 kPa, whereas MPD(y 1 ) = 2.19% and MPD(T) = 0.07% for the binary system at 2000 kPa.…”

“…Therefore, it is shown that the systems of this work meet these previous conditions. 25,26 After verifying the adequacy between the model and the procedure, the fugacity coefficients of the phases were calculated using eqs 16−19, as well as the corresponding residual enthalpies by using eqs 20 and 21. The results are shown in Table 11.…”

Experimental study on heat transfer of aviation kerosene in a vertical upward tube at supercritical pressures

“…The heat transfer characteristics of fluids at supercritical pressure have been extensively investigated since the 1950s, but existing studies in the open literature are focused mainly on supercritical heat transfer of carbon dioxide and water [6][7][8][9][10][11]. Shiralkar and Griffith [6,7] studied heat transfer of water numerically and heat transfer of CO 2 experimentally, and both found that the deterioration of heat transfer would occur at higher heat flux when the fluid temperature was lower than the pseudo-critical temperature and the wall temperature was higher than the pseudo-critical temperature.…”