RT info:eu-repo/semantics/article T1 Speed of sound measurements of biogas from a landfill biomethanation process A1 Segovia Puras, José Juan A1 Moreau Ortega, Alejandro A1 Paredes Méndez, Xavier A1 Fernández Vicente, Teresa A1 Vega Maza, David A1 Martín González, María del Carmen K1 Biogas K1 Sustainable development K1 Desarrollo sostenible K1 Biomass energy K1 Biomasa K1 Resonators K1 Sound K1 Sonido K1 Sound absorption K1 Noise control K1 Ruido - Control K1 Renewable energy resources K1 Energías renovables K1 Environmental engineering K1 Environment K1 5312.05 Energía K1 3322.02 Generación de Energía K1 2201.05 Ruido K1 2201 Acústica K1 3308 Ingeniería y Tecnología del Medio Ambiente AB Biogas is drawing attention as it can be a solution both to increase the renewable energy for heat or power supply and to help achieve a decarbonized economy. In this work, the measurements of the speed of sound of three mixtures of biogas from the biomethanation plant of the municipal waste of Valdemingómez, Madrid (Spain), are presented. The measurements were performed using an acoustic resonator, which is able to measure the speed of sound of gas mixtures with a relative expanded uncertainty of approximately 0.08%. A virial-type equation was also applied to fit the experimental values of the speed of sound, and the heat capacities as perfect gas were derived with uncertainties below 0.8%. In addition, the experimental results were compared with those calculated with the reference equations of state for natural gas mixtures such as GERG-2008 and AGA8-DC92. For both equations, the average relative deviations were less than 0.02% and 0.2% for the speed of sound and the heat capacities, respectively. These values are less than the uncertainties of these equations, demonstrating their reliability in predicting the thermodynamic behavior of biogas. PB MDPI SN 1996-1073 YR 2023 FD 2023 LK https://uvadoc.uva.es/handle/10324/69374 UL https://uvadoc.uva.es/handle/10324/69374 LA eng NO Energies, 2023, Vol. 16, Nº. 4, 2068 NO Producción Científica DS UVaDOC RD 22-dic-2024