The ideal adsorbed solution theory model (IAST) was applied to predict
the selectivity of binary mixtures of
C2H6/CH4 and
C3H8/CH4 on
Ni(TMBDC)(DABCO)0.5, respectively. Firstly, dual-site
Langmuir-Freundlich (DSLF) model was used to fit the single component
adsorption isotherms of
CH4/C2H6/C3H8at 298 K. [33] The fitting parameters and
correlation coefficients R2 from DSLF model are
listed in Table S2. The R2 of the fitting
curves for CH4, C2H6 and
C3H8 adsorption isotherms are up to
0.999, indicating the well description of the CH4,
C2H6 and
C3H8 adsorption behaviors on
Ni(TMBDC)(DABCO)0.5 by DSLF model.