II International Symposium on Carbon for Catalysis ABSTRACTS

PP-I-12
Activation with steam promotes the formation of mesopores with an average diameter of
20-40 Å but their volume smaller than of 0.15-0.20 cc/g at 35-37% burn off.
Таble 1. Microporous characteristics of the sorbents produced by manchurian nutshells
obtained from NLDFT and TVFM interpretation of N 2 adsorption data (77K)
Burn off*
V micro , сc/g
S micro , m 2 /g
H, Å
(%) NLDFT ТVFM NLDFT ТVFM NLDFT TVFM
5.2 0.1612 0.1648 270 259 8.7 12.7
13.5 0.2867 0.2465 493 513 11.4 9.6
37.0 0.3316 0.3104 576 621 10.5 10.0
*- nutshell was carbonized at 700 o C and then treated by steam at 800 o C
Table 2. Mesoporous characteristics of the sorbents produced by manchurian nutshells as
determined from a number of calculation methods:
NLDFT-method; DH-method (Dollimor-Hill); BDB-method (Broekhoff - de Boer)
Burn off
(%)
V meso , сc/g,
DH BDB NLDFT
D мезо , Å
DH BDB NLDFT
5.2 0.066 0.071 0.060 23 37 32
13.5 0.065 0.069 0.070 24 35 22
37.0 0.125 0.168 0.133 29 45 23
References
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5 Dombrowski R.J., Hyduke D.R. and Lastoskie C.M. Langmuir. 2000; 16:5041.
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