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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