Accurate thermodynamic characterization of a synthetic coal mine methane mixture

作者：Hernandez Gomez R; Tuma D; Villamanan M A; Mondejar M E; Chamorro C R^*

来源：Journal of Chemical Thermodynamics, 2014, 68: 253-259.

DOI：10.1016/j.jct.2013.09.023

• Coal mine methane
• Density measurements
• Single sinker densimeter
• GERG-2008 equation of state

In the last few years, coal mine methane (CMM) has gained significance as a potential non-conventional gas fuel. The progressive depletion of common fossil fuels reserves and, on the other hand, the positive estimates of CMM resources as a by-product of mining promote this fuel gas as a promising alternative fuel. The increasing importance of its exploitation makes it necessary to check the capability of the present-day models and equations of state for natural gas to predict the thermophysical properties of gases with a considerably different composition, like CMM. In this work, accurate density measurements of a synthetic CMM mixture are reported in the temperature range from (250 to 400) K and pressures up to 15 MPa, as part of the research project EMRP ENG01 of the European Metrology Research Program for the characterization of non-conventional energy gases. Experimental data were compared with the densities calculated with the GERG-2008 equation of state. Relative deviations between experimental and estimated densities were within a 0.2% band at temperatures above 275 K, while data at 250 K as well as at 275 K and pressures above 10 MPa showed higher deviations.

• 出版日期2014-1