Selective absorption of ionic liquids in separating R-1243zf or R-161 from refrigerant blends

IF 2.2 3区工程技术 Q3 CHEMISTRY, PHYSICAL

Journal of Chemical Thermodynamics Pub Date : 2024-04-10 DOI:10.1016/j.jct.2024.107307

Xiucan Jia, Yuhan Du, Xiaopo Wang

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Abstract

In order to recover and reuse pure refrigerants from the mixtures used in waste refrigeration facility, it is necessary to find a good way for separation. Due to the extremely low vapor pressure and good selectivity, ionic liquids (ILs) are regarded as promising entrainers for the extractive separation process of azeotropic or near-azeotropic mixtures. Phase behavior of refrigerant with ILs is the basic property in the design of selective absorption-separation process. In this work, the solubility of 3,3,3-trifluoropropene (R-1243zf) and ethyl fluoride (R-161) with trihexyltetradecylphosphonium chloride ([P_6,6,6,14][Cl]) were measured based on the isochoric saturation method. The experimental temperature range was from 283.15 K to 343.15 K. Five activity coefficient models, including Margules, van Laar, Scatchard-Hamer, Wilson and non-random two-liquid (NRTL) model, were used to correlate the experimental data, and the results were discussed. In addition, based on the literature data, the separation capacities of different ILs for refrigerant blends composed of R-1243zf or R-161 were investigated.

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离子液体在分离制冷剂混合物中的 R-1243zf 或 R-161 时的选择性吸收作用

为了从废弃制冷设备中使用的混合物中回收和再利用纯制冷剂，有必要找到一种良好的分离方法。离子液体（IL）具有极低的蒸气压和良好的选择性，因此被认为是共沸或近共沸混合物萃取分离过程中很有前途的夹带剂。制冷剂与离子液体的相行为是设计选择性吸收分离工艺的基本特性。本研究采用等速饱和法测定了 3,3,3-三氟丙烯（R-1243zf）和氟化乙烯（R-161）与三己基十四烷基氯化鏻（[P6,6,6,14][Cl]）的溶解度。采用 Margules、van Laar、Scatchard-Hamer、Wilson 和非随机双液（NRTL）模型等五种活度系数模型对实验数据进行了关联分析，并对结果进行了讨论。此外，根据文献数据，还研究了不同 IL 对由 R-1243zf 或 R-161 组成的制冷剂混合物的分离能力。

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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.