Accurate Experimental (p, ρ, and T) Data for the Introduction of Hydrogen into the Natural Gas Grid (II): Thermodynamic Characterization of the Methane-Hydrogen Binary System from 240 to 350 K and Pressures up to 20 MPa Hernández-Gómez, R.; Tuma, D.; Pérez, E.; Chamorro, C.R.; Journal of Chemical & Engineering Data 2018, 63, 1613-1630