Speed of sound for three binary ($C{H}_4$ + $H_2$) mixtures from $p$ = (0.5 up to 20) MPa at $T$ = (273.16 to 375) K

Abstract

Speed of sound is one of the thermodynamic properties that can be measured with least uncertainty and is of great interest in developing equations of state. Moreover, accurate models are needed by the H2 industry to design the transport and storage stages of hydrogen blends in the natural gas network. This research aims to provide accurate data for ($C{H}_4$ + $H_2$) mixtures of nominal (5, 10, and 50) mol-% of hydrogen, in the $p$ = (0.5 up to 20) MPa pressure range and with temperatures $T$ = (273.16, 300, 325, 350, and 375) K. Using an acoustic spherical resonator, speed of sound was determined with an overall relative expanded ($k$ = 2) uncertainty of 220 parts in $10^6$ (0.022%). Data were compared to reference equations of state for natural gas-like mixtures, such as AGA8-DC92 and GERG-2008. Average absolute deviations below 0.095% and percentage deviations between 0.029% and up to 0.30%, respectively, were obtained. Additionally, results were fitted to the acoustic virial equation of state and adiabatic coefficients, molar isochoric heat capacities and molar isobaric heat capacities as perfect-gas, together with second and third acoustic virial coefficients were estimated. Density second virial coefficients were also obtained.

References in corpus (4)

• Accurate experimental ($p$, $\rho$, $T$) data of natural gas mixtures for the assessment of reference equations of state when dealing with hydrogen-enriched natural gas
• Updated determination of the molar gas constant $R$ by acoustic measurements in argon at UVa-CEM
• Speeds of sound for a biogas mixture $C{H}_4$ + $N_2$ + $C{O}_2$ + $CO$ from $p$ = (1-12) MPa at $T$ = (273, 300 and 325) K measured with a spherical resonator
• Speeds of sound for ($C{H}_4$ + $He$) mixtures from $p$ = (0.5 to 20) MPa at $T$ = (273.16 to 375) K

Cited by in corpus (5)

• Thermophysical properties of hydrogen mixtures relevant for the development of the hydrogen economy: Review of available experimental data and thermodynamic models
• Speed of sound data and acoustic virial coefficients of two binary ($N_2$ + $H_2$) mixtures at temperatures between (260 and 350) K and at pressures between (0.5 and 20) MPa
• Speed of sound and phase equilibria for ($C{O}_2$ + $C_3{H}_8$) mixtures
• Impact of hydrogen addition, up to 20 % (mol/mol), on the thermodynamic ($p$, $\rho$, $T$) properties of a reference high-calorific natural gas mixture with significant ethane and propane content
• Speed of sound data, derived perfect-gas heat capacities, and acoustic virial coefficients of a calibration standard natural gas mixture and a low-calorific $H_2$-enriched mixture