Figure 4 (a) IAST selectivity of C2H6/CH4 (10:85, v/v) and /C3H8/CH4 (5:85, v/v) binary mixtures on Ni(TMBDC)(DABCO)0.5 at 298 K; (b) Comparison of selectivity for Ni(TMBDC)(DABCO)0.5and other reported MOFs
Figure 4(a) shows the IAST selectivities of Ni(TMBDC)(DABCO)0.5 at 298 K for the C2H6/CH4 (10:85, v/v) and C3H8/CH4 (85:5, v/v) binary mixtures. The C2H6/CH4 selectivity reached as high as 29 at 298 K and 100 kPa, and its C3H8/CH4 selectivity exhibited a descending trend in the range of 0 ~ 100 kPa and reached as high as 274, which are higher than most of the materials reported to date, as shown in Table 1. Moreover, Figure 4(b) summarizes C2H6/CH4 selectivities of Ni(TMBDC)(DABCO)0.5 and other MOFs materials. It is shown that Ni(TMBDC)(DABCO)0.5 exhibits not only high C2H6 capacity but also C2H6/CH4 selectivity compared to other MOFs, which could potentially address the trade-off between adsorption capacity and selectivity.