Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5373512 | Chemical Physics | 2014 | 6 Pages |
â¢Complete scaling concept was employed to develop EOS for near-critical fluid mixtures.â¢We used a 14-component gas mixture to represent a natural gas-condensate.â¢Adiabatic calorimeter was used to measure the gas-condensate mixture properties.â¢Proposed EOS allows to describe the obtained experimental data with high accuracy.â¢EOS enables us to calculate the dew-bubble curves and the mixture critical parameters.
Theory model based on the concept of so-called “complete scaling” has been extensively developed for multicomponent mixtures. As a result, the equation of state (EOS) for near-critical mixture with given composition has been formulated. To verify the validity of the obtained EOS, it was applied for the description of thermodynamic properties of the fourteen-component mixture modeling a natural gas condensate. The mixture has been studied in our laboratory by the adiabatic calorimetry method. The measurements of the pressure, the derivative (âP/âT)Ï,x and heat capacity CÏ,x were carried out for nine isochores in rather wide range of pressures and temperatures including the near-critical region. It has been demonstrated that the proposed EOS describes adequately the experimental data in one- and two-phase region of the mixture with the sufficiently high accuracy. In addition, the analysis of experimental data by means of developed EOS enables us to calculate the dew-bubble curves of the mixture as well as to determine the mixture critical parameters.
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