Prediction of Sublimation Pressures from SCO_2+HydrocarbonSystems Using a Particle Swarm Optimization

摘要

method to predict the sublimation pressures of solid hydrocarbons using abiologically-deriver algorithm is presented. Seven binary gas-solid phase systems of supercriticalcarbon dioxide with hydrocarbons are considered in this study. The Peng—Robinson equation ofstate with the Wong—Sandler mixing rules are used to evaluate the fugacity coefficient on thesystems. Then, particle swarm optimization is used for minimize the difference between calculatedand experimental solubility, and the sublimation pressures are calculated from solubility data. Theresults show that the method presented is reliable enough and can be used with confidence toestimate the sublimation pressure of other hydrocarbons.