Robust flash calculation algorithm for microemulsion phase behavior

摘要

The technology extends hyperbolic-lipophilic difference and net average curvature (HLD-NAC) to a robust algorithm for predicting the phase behavior of microemulsions at different conditions away from experimental results. The HLD-NAC equations are modified to ensure consistency over the entire composition space including type II− and II+ regions. The algorithm converges and provides continuous estimates with any formation variable of tie lines and triangles for all Winsor types. The algorithm is configured such that discontinuities are eliminated and limiting tie lines near critical points are determined analytically. The algorithm is tuned using several sets of experimental data and provides for predictability of tie lines and tie triangles, and solubilization ratios.