Measurement and modelling of vapor–liquid phase equilibrium of 1,1-difluoroethane (R152a) + 1,1,2,3,3,3-hexafluoro-1-propene (R1216) at temperatures ranging from 283.15 K to 313.15 K

IF 2.2 3区工程技术 Q3 CHEMISTRY, PHYSICAL Journal of Chemical Thermodynamics Pub Date : 2024-03-29 DOI:10.1016/j.jct.2024.107292

Jialiang Hua, Guogeng He, Dehua Cai, Zhihao Zhang, Zian Hao, Wei Yang

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Abstract

Compared to pure refrigerants, mixed refrigerants can effectively fulfill the demands of high efficiency, safety, and environmental preservation. An efficient mixture can be created by combining environmentally safe and non-combustible refrigerants with low global warming potential (GWP) and high latent heat hydrofluorocarbons (HFCs) in precise ratios. For this investigation, an experimental apparatus was built to obtain vapor–liquid equilibrium (VLE) data for the R152a + R1216 mixture within temperatures of 283.15 to 313.15 K. To depict the VLE characteristics of the binary systems, the Peng-Robinson (PR) equation of state (EoS) was utilized with the van der Waals (vdW) mixing rule. And to compare, the Huron and Vidal first-order (HV) and the Wong-Sandler (WS) mixing rules were utilized alongside the PR EoS and the non-random two-liquid (NRTL) activity coefficient model to correlate the acquired data. The findings indicated that the models showed strong concurrence with the empirical data. The binary mixture displays a near-azeotropic phenomenon when the mole fraction of R152a is below 0.65. The azeotropic point is fall within the experimental temperature range when the R152a liquid-phase has a mole fraction between 0.3069 and 0.4104.

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在 283.15 K 至 313.15 K 温度范围内测量 1,1-二氟乙烷 (R152a) + 1,1,2,3,3,3- 六氟-1-丙烯 (R1216) 的气液相平衡并建立模型

与纯制冷剂相比，混合制冷剂能有效满足高效、安全和环保的要求。将环保安全、不可燃、全球升温潜能值（GWP）低、潜热值高的氢氟碳化物（HFCs）以精确的比例混合在一起，可以产生高效的混合物。为了描述二元体系的 VLE 特性，我们使用了彭-罗宾逊（PR）状态方程（EoS）和范德华（vdW）混合规则。为了进行比较，在使用彭-罗宾逊（PR）状态方程（EoS）和非随机双液（NRTL）活度系数模型的同时，还使用了休伦和维达尔一阶（HV）混合规则和黄-桑德勒（WS）混合规则来关联所获得的数据。研究结果表明，这些模型与经验数据非常吻合。当 R152a 的摩尔分数低于 0.65 时，二元混合物显示出接近共沸现象。当 R152a 液相的分子分数介于 0.3069 和 0.4104 之间时，共沸点落在实验温度范围内。

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来源期刊

Journal of Chemical Thermodynamics 工程技术-热力学

CiteScore

5.60

自引率

15.40%

发文量

199

审稿时长

79 days

期刊介绍： The Journal of Chemical Thermodynamics exists primarily for dissemination of significant new knowledge in experimental equilibrium thermodynamics and transport properties of chemical systems. The defining attributes of The Journal are the quality and relevance of the papers published. The Journal publishes work relating to gases, liquids, solids, polymers, mixtures, solutions and interfaces. Studies on systems with variability, such as biological or bio-based materials, gas hydrates, among others, will also be considered provided these are well characterized and reproducible where possible. Experimental methods should be described in sufficient detail to allow critical assessment of the accuracy claimed. Authors are encouraged to provide physical or chemical interpretations of the results. Articles can contain modelling sections providing representations of data or molecular insights into the properties or transformations studied. Theoretical papers on chemical thermodynamics using molecular theory or modelling are also considered. The Journal welcomes review articles in the field of chemical thermodynamics but prospective authors should first consult one of the Editors concerning the suitability of the proposed review. Contributions of a routine nature or reporting on uncharacterised materials are not accepted.