A Robust Iterative Method for Flash Calculations Using the Soave-Redlich-Kwong or the Peng-Robinson Equation of State
- 1 June 1983
- journal article
- conference paper
- Published by Society of Petroleum Engineers (SPE) in Society of Petroleum Engineers Journal
- Vol. 23 (03) , 521-530
- https://doi.org/10.2118/8285-pa
Abstract
A robust algorithm for flash calculations that uses an equation of state (EOS) is presented. It first uses a special version of the successive substitution (SS) method and switches to Powell's method if poor convergence is observed. Criteria are established for an efficient switch from one method to the other. Experience shows that this method converges near the critical point and also detects the single-phase region without computing the saturation pressure. The Soave-Redlich-Kwong1 (SRK) and the Peng-Robinson2 (PR) EOS's are used in this work, but the method is general and applies to any EOS.This publication has 5 references indexed in Scilit:
- Gibbs Energy Analysis of Phase EquilibriaSociety of Petroleum Engineers Journal, 1982
- Predicting Phase Behavior of Condensate/Crude-Oil Systems Using Methane Interaction CoefficientsJournal of Petroleum Technology, 1978
- An Iterative Sequence for Phase-Equilibria Calculations Incorporating the Redlich-Kwong Equation of StateSociety of Petroleum Engineers Journal, 1978
- A rigorous method for predicting the critical properties of multicomponent systems from an equation of stateAIChE Journal, 1977
- Equilibrium constants from a modified Redlich-Kwong equation of stateChemical Engineering Science, 1972