Speed of Sound, Density, and Derivative Properties of Ethyl Myristate, Methyl Myristate, and Methyl Palmitate under High Pressure

Abstract

Speeds of sound have been measured in ethyl myristate (C 16 H 32 O 2 ), methyl myristate (C 15 H 30 O 2 ), and methyl palmitate (C 17 H 34 O 2 ) at pressures up to 100 MPa along isotherms ranging from (293.15 to 403.15) K. The measurements were carried out using a pulse echo technique operating at 3 MHz. Additional compressed liquid density measurements were performed from (293.15 to 393.15) K with pressures from (0.1 to 100) MPa in order to evaluate isentropic compressibility using speed of sound measurements. An equation of state that represents both the density and the speed of sound temperature reported experimental data within their estimated uncertainties is given to evaluate the volume as well as its derivatives of these components.

Speed of sound and derivative properties of hydrofluoroether fluid HFE-7500 under high pressure

“…All the details concerning the various stages in the calculation of these properties are discussed in a previous paper [16]. In order to adjust parameters, it is necessary to evaluate the parameter of v ref from atmospheric density data and then to estimate the coefficients a, b and d by minimizing the following objective function:…”

Correlation and prediction of biodiesel density for extended ranges of temperature and pressure

“…We have recalculated the constant A in Eq. (10) by fitting densities of methyl palmitate [57], methyl oleate [1,58], and methyl linoleate [27,58], since they were the most abundant FAMEs in the biodiesels. The fitting of Eq.…”

Speed of sound in pure fatty acid methyl esters and biodiesel fuels

“…where the subscript i refers to a subset with an average deviation value (AAD%) i for the (T, k m ) data and N s is the number of systems (subsets) involved. The OAAD% for equations (14) and (16) are 0.17 and 0.19%, respectively. Table 6 Molar compressibility (k m ) for FAME, synthetic and produced biodiesels.…”