RT info:eu-repo/semantics/article
T1 Accurate experimental (p, ρ, T) data and virial coefficients for the (methane and helium) binary system
A1 Hernández Gómez, Roberto
A1 Tuma, Dirk
A1 Villamañán Olfos, Rosa María
A1 Chamorro Camazón, César Rubén
K1 Termodinámica
K1 Methane
K1 Helium
K1 Natural gas
K1 Density
K1 Single-sinker densimeter
K1 GERG-2008 equation of state
AB The quality and the availability of experimental data limit the achievable accuracy of multiparameter equations of state, such as the GERG-2008. Referring to the fundamentals of this wide-range equation of state, no suitable data were available for many mixtures containing helium. This work provides accurate experimental (p, ρ, T) data for three binary mixtures of methane with helium: (0.95 (amount-of-substance fraction) CH4 + 0.05 He) and (0.90 CH4 + 0.10 He) at temperatures of (240, 250 and 260) K, and (0.50 CH4 + 0.50 He) from (240 to 400) K. This work is a continuation of a previous one which reported accurate experimental (p, ρ, T) data for the (0.95 CH4 + 0.05 He) and the (0.90 CH4 + 0.10 He) binary mixtures in the temperature range from the (250 to 400) K. All density measurements were performed by using a single-sinker densimeter with magnetic suspension coupling at pressures up to 20 MPa. Experimental data were compared with the corresponding densities calculated from the GERG-2008 and the AGA8-DC92 equations of state. Deviations from the GERG-2008 are much larger than from the AGA8-DC92 (up to –6.5 %). These deviations increased with decreasing temperature, with increasing pressure, and with increasing helium fraction. In contrast, deviations from the AGA8-DC92 are within the 0.5 % band. The experimental values were also used to calculate the second interaction virial coefficient  for this mixture.
PB Elsevier ltd.
SN 0021-9614
YR 2016
FD 2016
LK http://uvadoc.uva.es/handle/10324/29099
UL http://uvadoc.uva.es/handle/10324/29099
LA eng
NO J. Chem. Thermodynamics 101 (2016) 168–179
DS UVaDOC
RD 02-may-2024