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Correlation of viscosity of aqueous solutions of alkanolamine mixtures based on the Eyring's theory and Wong-Sandler mixing rule
, Article Iranian Journal of Chemistry and Chemical Engineering ; Volume 32, Issue 2 , 2013 , Pages 9-17 ; 10219986 (ISSN) ; Ghotbi, C ; Taghikhani, V ; Jalili, A ; Sharif University of Technology
2013
Abstract
A viscosity model, based on Eyring's absolute rate theory combined with a cubic PR equation of state and Wong-Sandler mixing rule, has been proposed in order to correlate viscosities of aqueous solutions of alkanolamine mixtures at atmospheric pressure and different temperatures. In the proposed method, the energy and size parameters in studied Equation of State (EoS) have been obtained using the Wong - Sandler (WS) mixing rule combined with the NRTL and Wilson Gibbs equations. The NRTL and Wilson parameters for aqueous solutions of alkanolamine mixtures have been correlated using measured viscosity data at atmospheric pressure and different temperatures. The overall average deviation...
Performance of three mixing rules using different equations of state for hard-spheres
, Article Fluid Phase Equilibria ; Volume 187-188 , 2001 , Pages 321-336 ; 03783812 (ISSN) ; Vera, J. H ; Sharif University of Technology
2001
Abstract
The predictions of the pair radial distribution function (RDF) at contact value, compressibility factor, and chemical potentials for binary and ternary hard-sphere mixtures obtained with the Barrio-Solana, the Santos et al., and the generalized Lebowitz mixing rules are compared using the Carnahan-Starling, Kolafa, and Khoshkbarchi-Vera one-component hard-sphere EOS. An expression for the pair RDF at contact value for Barrio-Solana mixing rule and the expressions for the chemical potentials in multicomponent hard-sphere fluids are derived. As a general rule, the equations of state obtained based on the generalized Lebowitz mixing rule predict better the pair RDF at contact value simulated...
A Mixing Rule Based on WS Rule for Prediction of Phase Behavior of Polymer Solutions
, M.Sc. Thesis Sharif University of Technology ; Ghotbi, Cirus (Supervisor) ; Taghikhani, Vahid (Supervisor)
Abstract
The cubic equation of state (CEOS) is a powerful method for calculation of (vapor + liquid) equilibrium (VLE) in polymer solutions. However, the traditional mixing rules are not appropriate to extend the CEOS to non-ideal mixtures such as polymer solutions. For better prediction of (vapor + liquid) equilibria in polymer solutions, it is better to use mixing rules based on Excess Gibbs free energy function, GE. Choosing an appropriate excess Gibbs free energy for a mixing rule is a major step. In this work, by using three EOS (PRSV, Dashtizadeh and SRK) with FH-NRTL-NRF excess Gibbs free energy model and Wong–Sandler mixing rule, the EOS/GE method is applied for prediction of phase...