Page 328 - Adsorbents fundamentals and applications

HYDROGEN STORAGE 313

Table 10.6. Reported hydrogen storage in single-wall nanotubes (SWNT), multiwall nano-
tubes (MWNT), and graphite nanofibers (GNF)
Material H 2 wt% T(K), P(MPa) Notes Ref.
SWNT ∼5–10 133, 0.04 by TPD, see text Dillon et al., 1997
MWNT 11.26 300, 9 See text Chambers et al.,
1998
GNF 67.55 300, 12 See text Chambers et al.,
1998
◦
GNF 35 300, 11 Treated @ 1000 C, Park et al., 1999
in Ar
Li/MWNT 20 473–673, 0.1 Flow system (TGA) Chen et al., 1999
K/MWNT 14 300, 0.1 Flow system (TGA) Chen et al., 1999
Li/MWNT 2.5 473–673, 0.1 Flow system (TGA), Yang, 2000
gas pre-dried
K/MWNT 1.8 300, 0.1 Flow system (TGA), Yang, 2000
gas pre-dried
K/MWNT 1.3 300, 0.1 Flow system (TGA), Pinkerton et al.,
gas pre-dried 2000
◦
SWNT ∼8 80, 11.2 Treated at 220 Cin Ye et al., 1999
vacuo
◦
SWNT 4.2 300, 10.1 Treated at 500 Cin Liu et al., 1999
vacuo
MWNT 3.98 300, 10 Treated in Ar at Li et al., 2001
◦
2200 C(2 h)
GNF <0.7 296, 11 Untreated or treated Tibbetts et al.,
◦
in H 2 at 500 C 2001
GNF 0.7 295, 10.5 Treated at 1300 K in Poirier et al., 2001
He flow for 1 h.
SWNT 1.5 300, 0.08 Ti-contaminated Hirscher et al.,
during sonication 2001
◦
SWNT 0.05 296, 3.59 Treated @ 500 C, H 2 Tibbetts et al.,
2001
◦
GNF ∼15 300, 12 Pretreated at 150 C Gupta and
in vacuo Srivastava, 2001
GNF 6.5 300, 12 Same as Gupta et al. Browning et al.,
2002
MWNT 0.65 300–373, 0.1 Residual MgNiO x Lueking and Yang,
◦
catalyst, 800 Cin 2002
H 2
MWNT 3.6 298, 7 Residual MgNiO x Lueking and Yang,
◦
catalyst, 800 Cin 2003
H 2