Isothermal Vapor鈥揕iquid Equilibrium of the Ternary Mixture of 1,1,1,2-Tetrafluoroethane + 2,3,3,3-Tetrafluoroprop-1-ene + Dimethyl Ether at Temperatures from 253.15 K to 323.15 K

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• 作者：Xiaohong Han ; Zanjun Gao ; Jun Lei ; Bo Yang ; Yang Zhao ; Guangming Chen
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2015
• 出版时间：August 13, 2015
• 年：2015
• 卷：60
• 期：8
• 页码：2219-2225
• 全文大小：372K
• ISSN：1520-5134

文摘

Isothermal vapor鈥搇iquid equilibrium (VLE) data for the ternary mixture of 1,1,1,2-tetrafluoroethane (HFC-134a) + 2,3,3,3-tetrafluoroprop-1-ene (HFO-1234yf) + dimethyl ether (DME) were measured at temperatures from 253.15 K to 323.15 K using a recirculation apparatus. The experimental data were correlated by the PR (Peng鈥揜obinson) equation of state with the LCVM (linear combination of Vidal and Michelsen) mixing rule and the NRTL (nonrandom two liquid) model. The average absolute vapor composition deviations are 0.007 (for HFC-134a) and 0.012 (for HFO-1234yf), and the largest absolute deviation of the vapor compositions are 0.022 (for HFC-134a) and 0.031 (for HFO-1234yf); the average relative pressure deviation is within 1.2 % and its largest relative pressure deviation is 3.7 %. The correlation results are in good agreement with the experiment results. With the regressed parameters obtained by the ternary mixture (HFC-134a + HFO-1234yf + DME), the VLE of two binary mixtures (HFC-134a + HFO-1234yf and HFC-134a + DME) were predicted by the PR + LCVM + NRTL model. The predicted results were compared with the experimental data of other researchers. The results showed that the regressed parameters obtained by the ternary mixture (HFC-134a + HFO-1234yf + DME) in this work could be used to predict VLE behavior of the binary mixtures. The results also indicated that there is no azeotrope in the ternary mixture.