Prediction of Vapor鈥揕iquid Coexistence Data for p-Cymene Using Equation of State Methods and Monte Carlo Simulations

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• 作者：Madakashira Harini ; Jhumpa Adhikari ; K. Yamuna Rani
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2014
• 出版时间：October 9, 2014
• 年：2014
• 卷：59
• 期：10
• 页码：2987-2994
• 全文大小：308K
• ISSN：1520-5134

文摘

A naturally occurring aromatic organic compound, p-cymene, finds applications as reaction intermediate, solvent in production of pharmaceuticals, fragrances, and fine chemicals. The experimental vapor liquid equilibria (VLE) data of p-cymene is available at pressures up to 537.4 kPa. In this study, the thermodynamic properties of p-cymene are determined using structure property correlations combined with equations of state (EoS) and molecular simulation techniques. Two molecular simulation techniques, Gibbs ensemble Monte Carlo (GEMC) and grand canonical-transition matrix Monte Carlo (GC-TMMC) have been employed for prediction of VLE. The estimates of properties, including vapor pressures, heats of vaporization, coexistence densities, and critical properties have been compared with available experimental data. The thermodynamic properties predicted by molecular simulations and also that obtained from Peng鈥揜obinson (PR) and volume translated Peng鈥揜obinson (VTPR) EoS are generally, in broad agreement with the experimental data. Further, GEMC results for coexistence densities and saturation vapor pressures are compared with that from GC-TMMC technique.