Phase stability analysis using interval Newton method with NRTL model

Hatice Gecegormez; Yasar Demirel

doi:10.1016/j.fluid.2005.08.014

Phase stability analysis using interval Newton method with NRTL model

Hatice Gecegormez, Yasar Demirel

Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

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 language	English (US)
Pages (from-to)	48-58
Number of pages	11
Journal	Fluid Phase Equilibria
Volume	237
Issue number	1-2
DOIs	https://doi.org/10.1016/j.fluid.2005.08.014
State	Published - Oct 25 2005

Keywords

Interval Newton method
NRTL model
Phase stability

ASJC Scopus subject areas

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

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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.",

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AU - Demirel, Yasar

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N2 - 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.

AB - 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.

KW - Interval Newton method

KW - NRTL model

KW - Phase stability

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ER -

Phase stability analysis using interval Newton method with NRTL model

Abstract

Keywords

ASJC Scopus subject areas

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