Solid-fluid phase behaviour in binary mixtures: A new classification focused on paraffinic systems

QUINZIO, M.J.; TASSIN, N.G.; PORRAS GIRALDO, A.F.; RODRIGUEZ REARTES, S.B.; ZABALOY, M.S.; CISMONDI DUARTE, M.

FLUID PHASE EQUILIBRIA

ELSEVIER SCIENCE BV

Año: 2023 vol. 573

0378-3812

he solid-fluid phase behaviour of mixtures is important in a variety of real situations of industrial interest, including paraffin precipitation from hydrocarbon reservoir fluids, supercritical extraction or precipitation processes, and cryogenic processes amongst others. In the case of binary mixtures with the presence of fluid and solid phases, such behaviors can yield different topologies in terms of critical lines, three-phase lines, critical end points and quadruple points. The classification proposed by Yamamoto et al. in 1989 for those topologies is probably the best known and most used one, besides being more complete than others when considering experimentally observed behaviors. Nevertheless, a number of publications and in particular two recent PhD theses developed in our groups, found other topologies which deviate from the types considered in Yamamoto´s et al. classification. These two theses employed different modelling approaches, using equation of state models for desc