Rough Estimate of Thermal Diffusion Factor for H₂-HT Isotopic Mixture by Separative Measurement Using Thermal Diffusion Column

Abstract

The Chapman-Cowling (CC) formula as well as the Monchick-Sandler-Mason (MSM) formula for the thermal diffusion factor for H₂-HT gas mixture were examined through separative analysis by comparing experimental results of isotope separation using thermal diffusion column. The CC formula could not explain quantitatively the thermal diffusion between H₂ and HT, whatever parameters and/or intermolecular model potentials we chose. The Lennard-Jones (9-6) potential was regarded as the most adequate one among the model potentials tested here for H₂-FIT gas mixture. The MSM formula was approximated so as to be evaluated even when input data for the formula are not available. The inelastic collision integral ratios were also estimated roughly in two ways. Application of the MSM formula could have reduced discrepancies between experimental and analytical results although the estimates of the formula and the inelastic collision integral ratios were rough.