Phase Equilibria in Multicomponent Mixtures using Continuous Thermodynamics

연속열역학을 이용한 다성분 혼합물의 상평형

  • 용평순 (대성산소 초저온연구소) ;
  • 김기창 (강원대학교 공과대학 화학공학과) ;
  • 권영중 (강원대학교 공과대학 화학공학과)
  • Published : 1998.12.31

Abstract

Continuous thermodynamics has been applied for modeling of phase equilibria in multicomponent mixtures, to avoid disadvantages of the pseudo-component and key-component method. In this paper continuous thermodynamic relations formulated by using the Pate-Teja equation of state were adopted for calculations of phase equilibria in natural gas mixtures, crude oil mixtures and mixtures extracted by supercritical $CO_2$ fluids. Calculations of phase equilibria were performed by two procedures ; a moment method coupled with the beta distribution function and a quadrature method combined with Gaussian-Legendre polynomials. Calculated results were compared with experimental data. It was showed that continuous thermodynamic frameworks considered in this paper were well-matched to experimental data.

Keywords