Phase Equilibrium for Hydrofluorocarbon R134a Hydrate. Hydrate-Based Desalination of NaCl Salt Solution

IF 1.3 4区 工程技术 Q3 ENGINEERING, MECHANICAL Journal of Engineering Thermophysics Pub Date : 2024-09-18 DOI:10.1134/s1810232824030172
A. V. Meleshkin, A. K. Sagidullin, S. Y. Misyura, V. S. Morozov, N. V. Marasanov, V. V. Glezer, M. Sh. Madygulov, M. T. Mito
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Abstract

Experimental dependences (pressure-temperature) of phase equilibrium of hydrofluorocarbon R134a hydrate have been obtained in aqueous solution of the NaCl salt. The measurements were carried out at a salt concentration in water of 3.25 wt. % in the pressure range from 0.5 to 2.5 bar at temperatures varying from −3 to 10°C. In contrast with the pure water system, the presence of salt in the solution had an inhibitory effect. The equilibrium temperature on the equilibrium curve of R134a hydrate at a set pressure decreased by 12–25%, unlike the temperature for the system with pure water. Combined washing process followed by centrifugation decreased the mass concentration of the salt in the solution by 92% compared to the initial salt concentration.

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氢氟碳化合物 R134a 水合物的相平衡。基于水合物的氯化钠盐溶液脱盐
摘要 在氯化钠水溶液中获得了氢氟碳化合物 R134a 水合物相平衡的实验依赖性(压力-温度)。测量是在水中盐浓度为 3.25 wt. % 时进行的,压力范围为 0.5 至 2.5 巴,温度范围为 -3 至 10°C。与纯水系统相比,盐在溶液中的存在具有抑制作用。在设定压力下,R134a 水合物平衡曲线上的平衡温度降低了 12-25%,这与纯水系统的温度不同。与初始盐浓度相比,溶液中的盐浓度降低了 92%。
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来源期刊
Journal of Engineering Thermophysics
Journal of Engineering Thermophysics THERMODYNAMICS-ENGINEERING, MECHANICAL
CiteScore
2.30
自引率
12.50%
发文量
0
审稿时长
3 months
期刊介绍: Journal of Engineering Thermophysics is an international peer reviewed journal that publishes original articles. The journal welcomes original articles on thermophysics from all countries in the English language. The journal focuses on experimental work, theory, analysis, and computational studies for better understanding of engineering and environmental aspects of thermophysics. The editorial board encourages the authors to submit papers with emphasis on new scientific aspects in experimental and visualization techniques, mathematical models of thermophysical process, energy, and environmental applications. Journal of Engineering Thermophysics covers all subject matter related to thermophysics, including heat and mass transfer, multiphase flow, conduction, radiation, combustion, thermo-gas dynamics, rarefied gas flow, environmental protection in power engineering, and many others.
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