WETTABILITY SPREADING OF ALKANES AT THE WATER-GAS INTERFACE AT ELEVATED-TEMPERATURES AND PRESSURES/

The Hamaker-Lifshitz theory is used to calculate the spreading coeffic ient of alkanes on water or brine at elevated temperatures and pressur es. The dielectric polarizability at elevated temperature and pressure is estimated as a function of density through the Clausius-Mosotti eq uation. When complete data is not available, the wetting transition ca n be estimated from the refractive index at elevated temperatures and pressures. The spreading of alkanes on brine can also be estimated fro m the refractive index of the brine as a function of electrolyte conce ntration. The approach used here for alkanes is also used to estimate the conditions for the spreading of H2S between water and sulfur. (C) 1998 Elsevier Science B.V. Ail rights reserved.