Transport properties of dilute ammonia-noble gas mixtures from new intermolecular potential energy functions

Previously we have determined the dilute mixture transport properties of slightly polar fluorocarbons using the inverted intermolecular potential energies(Ind.Eng.Chem.Res.45(2006)9211-9223).In the present paper,the corresponding states correlations for reduced viscosity collision integrals were employed to obtain effective un-like interaction potential models for dilute binary mixtures of highly polar molecule ammonia with noble gases. The inverted potentials were fitted to the Morse-Spline-van der Waals(MSV),model potential.The method of least-squares fitting was then applied to identify best consistence force parameters for each ammonia-noble gas mixture,taking advantage of experimental viscosities,diffusion coefficients and thermal conductivities. The proposed potential models were compared with those obtained from other sources,in order to assess the ex-tent of their validity. The potentials were later employed to calculate transport properties of the studied mixtures.Then,results were compared with those reported in the literature,which led to the acceptable agreement.