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.