Isothermal Vapor–Liquid Equilibrium for the Tetrafluoromethane (R14) + Octafluoropropane (R218) Binary Mixture at Five Temperatures from 173.150 to 213.150 K,Journal of Chemical & Engineering Data

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Isothermal Vapor–Liquid Equilibrium for the Tetrafluoromethane (R14) + Octafluoropropane (R218) Binary Mixture at Five Temperatures from 173.150 to 213.150 K
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2022-09-27 , DOI: 10.1021/acs.jced.2c00444
Yunxiao Wang _{1,

2} , Xian Wang _{1,

2} , Yanxing Zhao ₁ , Xueqiang Dong _{1,

2} , Yuwei Sun _{1,

2} , Maoqiong Gong _{1,

2}

Affiliation

Tetrafluoromethane (R14) and octafluoropropane (R218) are essential nonflammable refrigerants for mixed-refrigerant Joule Thomson refrigerators. In this paper, the vapor–liquid equilibrium (VLE) data were acquired for the R14 + R218 binary mixture from 173.150 to 213.150 K by a vapor-phase single-cycle method. The VLE data were regressed by the Soave–Redlich–Kwong (SRK) equation of state plus van der Waals (vdW) mixing rule model (SRK-vdW) and the Soave–Redlich–Kwong (SRK) equation of state combined with modified Huron–Vidal first-order (MHV1) mixing rule plus non-random two liquids (NRTL) activity coefficient model (SRK-MHV1-NRTL). The maximum average absolute relative deviation of pressure (AARDp) and the maximum average absolute deviation of vapor-phase mole concentration (AADy) are 2.42% and 0.0019 for the SRK-vdW model, respectively. A better correlation result was obtained by the SRK-MHV1-NRTL model, and the maximum AARDp and AADy are 1.04% and 0.0019, respectively. Based on the experimental and calculated results, a strong non-azeotropic behavior was found.

中文翻译：

四氟甲烷 (R14) + 八氟丙烷 (R218) 二元混合物在 173.150 至 213.150 K 五个温度下的等温汽液平衡

四氟甲烷 (R14) 和八氟丙烷 (R218) 是混合制冷剂 Joule Thomson 冰箱必不可少的不可燃制冷剂。在本文中，通过气相单循环方法获得了 R14 + R218 二元混合物从 173.150 到 213.150 K 的汽液平衡 (VLE) 数据。VLE 数据通过 Soave-Redlich-Kwong (SRK) 状态方程加范德华 (vdW) 混合规则模型 (SRK-vdW) 和 Soave-Redlich-Kwong (SRK) 状态方程与改进的 Huron 进行回归-Vidal一阶（MHV1）混合规则加非随机二液（NRTL）活度系数模型（SRK-MHV1-NRTL）。压力的最大平均绝对相对偏差 (AARD p ) 和气相摩尔浓度的最大平均绝对偏差 (AAD y) 对于 SRK-vdW 模型分别为 2.42% 和 0.0019。SRK-MHV1-NRTL模型得到了较好的相关性结果，最大AARD p和AAD y分别为1.04%和0.0019。根据实验和计算结果，发现了强烈的非共沸行为。

更新日期：2022-09-27

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