RT info:eu-repo/semantics/article
T1 Thermodynamic (p, ρ, T) characterization of a reference high-calorific natural gas mixture when hydrogen is added up to 20 % (mol/mol)
A1 Lozano Martín, Daniel
A1 Pazoki, Fatemeh
A1 Kipphardt, Heinrich
A1 Khanipour, Peyman
A1 Tuma, Dirk
A1 Horrillo Güemes, Alfonso Jesús
A1 Chamorro Camazón, César Rubén
AB The injection of hydrogen into the natural-gas grid is an alternative during the process of a gradual decarbonization of the heat and power supply. When dealing with hydrogen-enriched natural gas mixtures, the performance of the reference equations of state habitually used for natural gas should be validated by using high-precision experimental thermophysical data from multicomponent reference mixtures prepared with the lowest possible uncertainty in composition. In this work, we present experimental density data for an 11-compound high-calorific (hydrogen-free) natural gas mixture and for two derived hydrogen-enriched natural gas mixtures prepared by adding (10 and 20) mol-% of hydrogen to the original standard natural gas mixture. The three mixtures were prepared gravimetrically according to ISO 6142–1 for maximum precision in their composition and thus qualify for reference materials. A single-sinker densimeter was used to determine the density of the mixtures from (250–350) K and up to 20 MPa. The experimental density results of this work have been compared to the densities calculated by three different reference equations of state for natural gas related mixtures: the AGA8-DC92 EoS, the GERG-2008 EoS, and an improved version of the GERG-2008 EoS. While relative deviations of the experimental density data for the hydrogen-free natural gas mixture are always within the claimed uncertainty of the three considered equations of state, larger deviations can be observed for the hydrogen-enriched natural gas mixtures from any of the three equations of state, especially for the lowest temperature and the highest pressures.
SN 0360-3199
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/69101
UL https://uvadoc.uva.es/handle/10324/69101
LA spa
NO International Journal of Hydrogen Energy, 2024, vol. 70, p. 118-135.
DS UVaDOC
RD 01-sep-2024