In this study, the absorption performance of N-methyl pyrrolidone (NMP) was evaluated in propylene/ propane separation. The kinetic and equilibrium data were obtained for pure gas absorption at different temperatures (276.1, 293.1, and 328.1 K) and various pressures (up to their dew points). Itwas shown that the selectivity for propylene/propane absorption at different conditions was less than 2.0, and it was nearly independent of pressure and temperature. The solubility was also calculated using 1-parameter and 2-parameter Peng Robinson EOS by adjusting the binary interaction parameters kij and lij. The results demonstrated that relatively large values of kij (between 0.1 and 0.15 in 1-parameter model) regressed from the experimental data. It is predictable according to the dissimilar chemical structures of the solvent/solutes. It was also concluded that if the accurate values of kij have not been implemented in process simulators, the prediction of solubility data by using EOS could produce large errors of about 600% and 250% for propane/NMP and propylene/NMP, respectively. Furthermore, the presence of lij has a minor effect on the prediction of solubility data.
Compounds
#
Formula
Name
1
C5H9NO
N-methylpyrrolidone
2
C3H6
propene
3
C3H8
propane
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.