RT info:eu-repo/semantics/article
T1 Speed of sound data and acoustic virial coefficients of two binary (N2 + H2) mixtures at temperatures between (260 and 350) K and at pressures between (0.5 and 20) MPa
A1 Segovia Puras, José Juan
A1 Lozano Martín, Daniel
A1 Tuma, Dirk
A1 Moreau, Alejandro
A1 Martín González, María del Carmen
A1 Vega Maza, David
K1 Speed of sound
K1 Sonido, Velocidad del
K1 Acoustic resonance
K1 Resonancia acústica
AB This work aims to address the technical concerns related to the thermodynamic characterization of gas mixtures blended with hydrogen for the implementation of hydrogen as a new energy vector. For this purpose, new experimental speed of sound measurements have been done in gaseous and supercritical phases of two binary mixtures of nitrogen and hydrogen using the most accurate technique available, i.e., the spherical acoustic resonator, yielding an experimental expanded (k = 2) uncertainty of only 220 parts in 106 (0.022%). The measurements cover the pressure range between (0.5 and 20) MPa, the temperature range between (260 and 350) K, and the composition range with a nominal mole percentage of hydrogen of (5 and 10) mol%, respectively. From the speed of sound data sets, thermophysical properties that are relevant for the characterization of the mixture, namely the second βa and third γa acoustic virial coefficients, are derived. These results are thoroughly compared and discussed with the established reference mixture models valid for mixtures of nitrogen and hydrogen, such as the AGA8-DC92 EoS, the GERG-2008 EoS, and the recently developed adaptation of the GERG-2008 EoS, here denoted GERG-H2_improved EoS. Special attention has been given to the effect of hydrogen concentration on those properties, showing that only the GERG-H2_improved EoS is consistent with the data sets within the experimental uncertainty in most measuring conditions.
PB Elsevier
SN 0021-9614
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/52817
UL https://uvadoc.uva.es/handle/10324/52817
LA eng
NO The Journal of Chemical Thermodynamics, 2022, vol. 171, 106791
NO Producción Científica
DS UVaDOC
RD 12-jul-2024