modeling of co2 solubility in 1-butyl-3-methylimidazolium tricyanomethaneionic liquid using cpa eos

The present work presents results of simulation of co2 solubility in 1-butyl-3-methylimidazolium tricyanomethane ([c4mim][c(cn)3]) ionic liquid using cubic plus association (cpa) equation of state# to calculate the liquid phase concentrations, reaction equilibrium thermodynamic model (retm) was utilized# the retm defines an ab2 type reaction mechanism between two il and one co2 molecules into liquid phase# the [c4mim][c(cn)3] and co2 were considered to follow 2b and 1a association scheme# in other words, co2 was assumed to has not self association but it can establish cross association with the il# the results show excellent performance of the model to correlate co2 solubility in [c4mim][c(cn)3] so that the overall aad% equal to 6#58 obtained#