Page 326 - Adsorbents fundamentals and applications

HYDROGEN STORAGE 311

5
T (K)
4 293.15
288.15
323.15
338.15
3
353.15
q* (mol/kg) 2 383.15

1

0
0 5 10 15 20 25 30 35 40 45
P (MPa)
Figure 10.26. Hydrogen adsorption isotherms on activated carbon, CECA AC35 (BET surface
2
area ∼1000 m /g, from Lamari et al., 2000, with permission).

30
Temp.
77 K
25 93 K
Hydrogen adsorbed (m mol/g) 20 113

133
15
153
10
173
193
213
5
253
298
0
0 1 2 3 4 5 6 7
Pressure (MPa)
Figure 10.27. Hydrogen adsorption/desorption isotherms on super-activated carbon Anderson
2
AX-21 with a BET surface area = 2800 m /g (see 10.4 on this carbon), solid
symbols = adsorption, open symbols = desorption (from Zhou and Zhou, 1998, with
permission). (BET surface area from Benard and Chahine, 2001).