Abstract
Thermal diffusion factor (TDF) measurements were performed for one quaternary, for four ternary, and for six binary gaseous systems, containing \(\hbox {H}_{2}, \, \hbox {CH}_{4}, \, \hbox {N}_{2}\), and \(\hbox {CO}_{2}\) held under atmospheric pressure and at cold- and hot-chamber temperatures of \(T_{1}\) = 280 K and \(T_{2}\) = 800 K, respectively. For the multicomponent gas mixtures, measurements were made at different values of the mole fraction of the additive. Also, the dependence of the TDF values on the mole fraction of the additive for the multicomponent mixtures was analyzed. A semi-empirical formula to calculate TDF values was proposed; this formula gives results that are in good agreement with experimental data within the respective limits of error.
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Abbreviations
- BV:
-
Ballast vessel
- \(K_{ij }\) :
-
Empirical coefficient
- \(k_{Tij} \) :
-
Thermodiffusion ratio
- \(m_{i}\) :
-
mass of molecular of gas \(i \)(g\(\cdot \)mol\(^{-1})\)
- \(p \) :
-
Gas pressure (MPa)
- \(q_{ij}\) :
-
Separation factor
- SD:
-
Separation device
- \(T_{1}, \, T_{2}\) :
-
Gas temperature of cold and hot areas of gas (K)
- TDF:
-
Thermal diffusion factor
- TGP:
-
Thermal gravitational pump
- \(x_{ij}^{\mathrm{bin}}\) :
-
Mole fraction of component \(i\) in binary \(i-j\) mixture
- \(x_i^{\mathrm{mlt}}\) :
-
Mole fraction of component \(i\) in multicomponent mixture
- \(x_{iT}^{\mathrm{mlt}}\) :
-
Mole fraction of component \(i\) in multicomponent mixture at temperature \(T\)
- \(\alpha _{Tij}^{\mathrm{bin}}\) :
-
Thermal diffusion factor in binary mixture of gases \(i\) and \(j\)
- \(\alpha _{Tij}^{\mathrm{mlt}}\) :
-
Thermal diffusion factor for components \(i\) and \(j\) in multicomponent gas mixture
- \(\Delta x_{ij}^{\mathrm{bin}}\) :
-
Mole fraction change of component \(i\) in binary \(i-j\) mixture
- \(\Delta x_i^{\mathrm{mlt}}\) :
-
Mole fraction change of component \(i\) in multicomponent gas mixture
- \(\varepsilon \) :
-
Relative experimental error (%)
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This work was performed with financial support from the Ministry of Education and Science of the Russian Federation.
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Bogatyrev, A.F., Makeenkova, O.A. & Nezovitina, M.A. Experimental Study of Thermal Diffusion in Multicomponent Gaseous Systems. Int J Thermophys 36, 633–647 (2015). https://doi.org/10.1007/s10765-014-1818-7
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DOI: https://doi.org/10.1007/s10765-014-1818-7