You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
1.4<br />
1.2<br />
1.0<br />
(a)<br />
Wt. % H absorbed<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
(b)<br />
0.0<br />
-0.2<br />
0 500 1000 1500 2000 2500 3000<br />
corrected time (s)<br />
(a) Under H 2 , partial pressure of H 2 = 5.07 atm.<br />
(b) Under 50% H 2 -He (v/v), partial pressure of H 2 = 3.31 atm.<br />
Figure 27: Percent hydrogen curves of VTiNi hydrided with 50% (v/v) H 2 -He mixture<br />
and pure H 2 .<br />
3.2.2.2. LaNi 5<br />
The percent hydrogen release profile with time is given in Figure 28, including<br />
that of LaNi 5 hydrided with pure H 2 . After initial uptake of hydrogen of about 0.08%,<br />
about 0.38% terminal hydrogen capacity was reached in the following several hours. The<br />
presence of helium was shown to slow down the reaction and reduce hydrogen capacity.<br />
62
Change language