Phase stability analysis using interval Newton method with NRTL model

Hatice Gecegormez, Yasar Demirel

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The Gibbs energy minimization using activity coefficient models and nonlinear equation solution techniques are commonly applied for phase stability problems. However, dependence on the initial estimates and multiple solutions for these highly nonlinear equations are common drawbacks for some of the conventional approaches. We have used interval Newton method with the local composition model of NRTL for the phase stability analysis of 10 binary systems and 2 ternary systems at various feed compositions to locate all the stationary points. Results indicate that the interval Newton method is reliable and efficient.

Original languageEnglish (US)
Pages (from-to)48-58
Number of pages11
JournalFluid Phase Equilibria
Volume237
Issue number1-2
DOIs
StatePublished - Oct 25 2005

Fingerprint

Newton methods
Phase stability
Newton-Raphson method
Nonlinear equations
nonlinear equations
intervals
Activity coefficients
Gibbs free energy
Ternary systems
ternary systems
Chemical analysis
optimization
coefficients
estimates
energy

Keywords

  • Interval Newton method
  • NRTL model
  • Phase stability

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Phase stability analysis using interval Newton method with NRTL model. / Gecegormez, Hatice; Demirel, Yasar.

In: Fluid Phase Equilibria, Vol. 237, No. 1-2, 25.10.2005, p. 48-58.

Research output: Contribution to journalArticle

Gecegormez, Hatice ; Demirel, Yasar. / Phase stability analysis using interval Newton method with NRTL model. In: Fluid Phase Equilibria. 2005 ; Vol. 237, No. 1-2. pp. 48-58.
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