2026-04-27T20:04:45Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/290862025-03-26T19:10:03Zcom_10324_31661com_10324_952com_10324_894com_10324_1170com_10324_931col_10324_31662col_10324_1367

Lozano Martín, Daniel Segovia Puras, José Juan Martín González, María del Carmen Fernández Vicente, Teresa Campo Maldonado, Dolores del 2018-03-15T21:36:18Z 2018-12-12T00:40:47Z 2016 2040-01-01 Journal of Chemical Thermodynamics, , November 2016,Volume 102, Pages 348-356 http://uvadoc.uva.es/handle/10324/29086 10.1016/j.jct.2016.07.033 348 102 356 The present work aims to measure speeds of sound c in a biogas mixture of CH4+N2+CO2+CO, at p = (1 to 12) MPa and T = (273, 300 and 325) K, using a spherical acoustical resonator. The results are fitted to the virial acoustic equation of state, and the virial acoustic coefficients are obtained, β_a and γ_a and extrapolated to zero pressure, determining the adiabatic coefficient as perfect gas, γ^pg, and the isobaric and isochoric heat capacities as perfect gas, C_p^pg and C_V^pg, respectively. The speeds of sound are acquired with a mean expanded relative uncertainty of 165 parts in 106 (k = 2) and are compared with the results predicted by the reference equation of state for this kind of mixture (natural gas-like mixtures), EoS GERG-2008. Relative deviations between experimental data and values estimated by this model were less than 700 parts in 106 at T = 325 K, and below 400 parts in 106, and within measurement uncertainty of at T = 300 K, although appreciably higher at isotherm T = 273 K at the highest pressure data for this work, and even reaching values above 3.400 parts in 106. 2018 Ministerio de Economía y Competitividad, ENE2013-47812-R EURAMET project ENG54, Metrology for Biogas application/pdf eng Elsevier info:eu-repo/semantics/embargoedAccess Elsevier Speed of sound Acoustic resonance Spherical resonator Biogas Speeds of sound for a biogas mixture CH4+N2+CO2+CO from p = (1 to 12) MPa at T = (273, 300 and 325) K measured with a spherical resonator info:eu-repo/semantics/article SI