2026-10-23T10:26:17Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/53422024-05-03T09:30:56Zcom_10259_4707com_10259_5086com_10259_2604col_10259_4708

00925njm 22002777a 4500 dc Muñoz Rujas, Natalia author Aguilar Romero, Fernando author García Alonso, Jesús Marcos author Montero García, Eduardo author 2019-04 Awareness about environmental impact of greenhouse gas emissions has lead to search for other alternatives which can cover the same utility range of wellknown CFCs, HCFCs and PFCs but without their undesirable effects on the planet. Since Hydrofluoroether fluids (HFEs) have emerged as a good alternative, it is necessary to characterize their thermophysical properties in order to bring reliable data to the industry. Density and speed of sound are two of the most important physical properties because of the amount of information that they provide in the design of the machinery involved in the utilization of these fluids as well as data for the parametrization of equations of state. This paper reports a set of new data concerning high pressure density, ρ, for the binary mixture x HFE-7200 + (1 − x) 2-propanol in a broad range of pressures (0.1–140 MPa), and at several temperatures (from 293.15 to 393.15 K). Density values were correlated by employing a Tait-like equation in the same p, T ranges, and the derivative properties, that is, the isothermal compressibility κT, and the isobaric expansion αP, were determined. Excess molar volumes VE, which bring information about the change in volume observed in the mixture were also calculated for the eight mole fractions investigated. Speeds of sound, c, at 0.1 MPa were measured experimentally in the temperature range (293.15–333.15 K). By using the Laplace equation, isentropic compressibilities, κS, were calculated from density and sound velocity values. 0021-9614 http://hdl.handle.net/10259/5342 10.1016/j.jct.2018.12.018 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane 2-propanol Density Derivative properties Excess volumes Thermodynamics of binary mixtures 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane (HFE-7200) + 2-propanol: High pressure density, speed of sound and derivative properties