Boublik-Alder-Chen-Kreglewski

Chen and Kreglewski [11] developed a perturbation equation based on Boublik s [12] hard-convex-body equation as the reference fluid equation. The repulsive pressure is Alder et al. s double-series polynomial with modified coefficients fitted to experimental argon data. The Boublik-Alder-Chen-Kreglewski (BACK) eos is... 

The Boublik-Alder-Chen-Kreglewski augmented hard-core equation is applied to pure fluids and mixtures with special attention to the representation of phase equilibria. Equation constants are determined for twelve substances, and the three constants which are required of nonpolar, nonquantum fluids are correlated with the critical properties and acentric factor. The equation describes mixture-phase equilibria with the introduction of mixing rules and the use of up to two interaction constants for each binary system. 

The Boublik-Alder-Chen-Kreglewski (BACK) Equation is an augmented hard-core equation of the form... 

The compression factor is calculated from the Boublik-Alder-Chen-Kreglewski equation of state ... 

The Boublik-Alder-Chen-Kreglewski (henceforth referred to as BACK) equation so far has been successfully applied to calculate the residual properties of sulfur dioxide, hydrogen sulfide, benzene, naphthalene, tetralin, cis- and trans-decalin, furan, and tetrahydrofuran (3,4). 

Equation 1 expresses that the compressibility factor of a real fluid is the sum of a repulsive term and an attractive term. Chen and Kreglewski (I) suggested using Boublik s hard-core equation zh for the repulsive term (2) and to use the polynomial of Alder et al. (3) for the attractive term za. Thus... 

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