Phase equilibria of triolein to biodiesel reactor systems

摘要: Abstract The phase equilibria of biodiesel systems, which are comprised mixtures triolein, methanol, carbon dioxide, methyl-oleate, glycerol, and water, analyzed using PC-SAFT in ASPEN PLUS SAFT-γ Mie gPROMS (gSAFT) for systems the vicinity their critical point. Pure-species density liquid vapor-pressure data were used to regress pure-species parameters both variants SAFT equations. Binary vapor–liquid liquid–liquid equilibrium six species obtain binary interaction cross Mie. Vapor-liquid from literature supplemented with experimental taken herein a complete set parameters. Overall, gave best agreement data, but had difficulty predicting behavior ternary systems. showed good especially LLE However, Gibbs flash method yielded poor predictions dioxide mixture VLE VLLE regions ‒ but, addition tangent-plane-distance code revealed prediction unstable phases. Similarly, gSAFT gPROMS, was unable predict correct distributions, regressed prior studies. Consequently, examine conversion triolein methyl-oleate observed experimentally at conditions (95 °C 9.65 MPa), RK-ASPEN (without parameters) custom-written FORTRAN reactor program.