Speeds of sound for a biogas mixture $CH_{4}$ + $N_{2}$ + $CO_{2}$ + $CO$ from $p$ = (1-12) MPa at $T$ = (273, 300 and 325) K measured with a spherical resonator
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arXiv
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| Format: | Preprint |
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2024
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| author | Lozano-Martín, Daniel Segovia, José J. Martín, M. Carmen Fernández-Vicente, Teresa del Campo, D. |
| author_facet | Lozano-Martín, Daniel Segovia, José J. Martín, M. Carmen Fernández-Vicente, Teresa del Campo, D. |
| contents | The present work aims to measure speeds of sound $c$ in a biogas mixture of $CH_{4}$ + $N_{2}$ + $CO_{2}$ + $CO$, at $p$ = (1-12) MPa and $T$ = (273, 300 and 325) K, using a spherical acoustical resonator. The results are fitted to the virial acoustic equation of state, and the virial acoustic coefficients are obtained, $β_{a}$ and $γ_{a}$ and extrapolated to zero pressure, determining the adiabatic coefficient as perfect gas, $γ^{pg}$, and the isobaric and isochoric heat capacities as perfect gas, $C_{p}^{pg}$ and $C_{V}^{pg}$, respectively. The speeds of sound are acquired with a mean expanded relative uncertainty of 165 parts in $10^{6}$ ($k$ = 2) and are compared with the results predicted by the reference equation of state for this kind of mixture (natural gas-like mixtures), EoS GERG-2008. Relative deviations between experimental data and values estimated by this model were less than 700 parts in $10^{6}$ at $T$ = 325 K, and below 400 parts in $10^{6}$, and within measurement uncertainty of at $T$ = 300 K, although appreciably higher at isotherm $T$ = 273 K at the highest pressure data for this work, and even reaching values above 3 400 parts in $10^{6}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_10962 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Speeds of sound for a biogas mixture $CH_{4}$ + $N_{2}$ + $CO_{2}$ + $CO$ from $p$ = (1-12) MPa at $T$ = (273, 300 and 325) K measured with a spherical resonator Lozano-Martín, Daniel Segovia, José J. Martín, M. Carmen Fernández-Vicente, Teresa del Campo, D. Chemical Physics The present work aims to measure speeds of sound $c$ in a biogas mixture of $CH_{4}$ + $N_{2}$ + $CO_{2}$ + $CO$, at $p$ = (1-12) MPa and $T$ = (273, 300 and 325) K, using a spherical acoustical resonator. The results are fitted to the virial acoustic equation of state, and the virial acoustic coefficients are obtained, $β_{a}$ and $γ_{a}$ and extrapolated to zero pressure, determining the adiabatic coefficient as perfect gas, $γ^{pg}$, and the isobaric and isochoric heat capacities as perfect gas, $C_{p}^{pg}$ and $C_{V}^{pg}$, respectively. The speeds of sound are acquired with a mean expanded relative uncertainty of 165 parts in $10^{6}$ ($k$ = 2) and are compared with the results predicted by the reference equation of state for this kind of mixture (natural gas-like mixtures), EoS GERG-2008. Relative deviations between experimental data and values estimated by this model were less than 700 parts in $10^{6}$ at $T$ = 325 K, and below 400 parts in $10^{6}$, and within measurement uncertainty of at $T$ = 300 K, although appreciably higher at isotherm $T$ = 273 K at the highest pressure data for this work, and even reaching values above 3 400 parts in $10^{6}$. |
| title | Speeds of sound for a biogas mixture $CH_{4}$ + $N_{2}$ + $CO_{2}$ + $CO$ from $p$ = (1-12) MPa at $T$ = (273, 300 and 325) K measured with a spherical resonator |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2409.10962 |