Chemistry Reference
In-Depth Information
already reported in the previous paper [9] (
cf
. Figures 11, 14, 18 of reference 9). The
three
plots in Figure 19 clearly indicate that the initial steep rise appears in the
ranges of = 0 - 0.15, which is due to the primary filling into ultramicropores,
and the linear line is followed in the ranges of =0.15-0.50, which is due to the
secondary filling into supermicropores. The upper deviation of
plots from the
linear line (co-operative swing named by Kaneko and coworkers [20, 21]) can be
detected above
=0.50 by FT-15-ACF and FT-20-ACF.
Figure 18. Reduced adsorption isotherms of N
2
at 77.4 K by a series of ACF in the region
of
p/p
o
=10
-8
-1.0 together with the isotherms by nonporous reference carbon black (#51-CB
and Carbotrap-F-CB). ACF adsorbents; a: FT-07-ACF, b: FT-10-ACF, c: FT-15-ACF, d:
FT-20-ACF, e: FT-25-ACF.
V
The volumes of ultramicropores and supermicropores (
,
ultramicro
pore
II
I
n
0
,
n
V
) were estimated from the adsorbed amounts (
) at
sup
ermicropor
e
=0, which were obtained by back extrapolation of lines I and II to
=0 (see
Figure 19).
