Phase equilibrium feasibility studies for some fuel binary systems Propane-Heptane and Propane-Octane Mixture Using regular solution theory

Abstract

The objective of this work is the assessment of the feasibility studies of phase equilibria mutual solubility process utilizing supercritical propane. A thermodynamic model based on regular solution theory studies to evaluate activity coefficients expression to each phase for the gaseous compounds mixture in order to predict mutual solubility data. The use of equations derived from thermodynamic of the regular solution theory for collecting and predicting mutual solubility are discussed with reference to some binary pairs (propane / heptane and propane / octane systems). It is concluded that the calculation of some of the parameters required for these calculation would be difficult if the solute or heavy component heptane or octane were sensitive to temperature or complex substance about which little was known apart for its structural formula. An alternative productive is to apply activity coefficients expression of the regular solution theory from which is called Unifac theory to each phase. Calculation along these lines is described and the physical basis for applying this method under the relevant condition discussed. The Unifac theory approach in particular has been found to be in good estimation for the present studies of these systems Propane/heptane and propane/octane composition.