Thermodynamic consistency test for isobaric experimental data of water content of methane

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

“…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. In this work, the Peng−Robinson−Stryjek−Vera 29,30 (PRSV) model has been utilized because this EOS can fit accurately the experimental data and can be applied to check the consistency by using the Gibbs−Duhem equation.…”

A thermodynamic consistency test for experimental isobaric data of wax solubility in gaseous systems

“…The "Gibbs-Duhem" [3,6,7] relation can be written in terms of residual molar enthalpy (H R ) and residual molar volume (V R ) for a homogeneous mixture as follows [6,14]:…”

“…Further simplifications can also be made by designating the left and right hand sides of Eq. (6) by A T and A f , respectively, as follows [8,14]:…”

“…The equivalency of A T and A f within an acceptable deviation will determine the consistency of the dataset considered. This deviation is defined using a percent area deviation between experimental and calculated values [1,14]:…”

“…The GibbsDuhem [3,6,7] equation has been adopted by Valderrama for this purpose at constant temperature. In a previous study, a new approach for assessing the water content of methane experimental data at constant pressures was developed [14]. Hence depending on experimental data being considered, and whether the data are at constant pressure or temperature, either the constant pressure or constant temperature approach can be employed.…”