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Thesis - Oztek_Muzaffer_T_200508_MA

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19<br />

18<br />

P (atm)<br />

17<br />

16<br />

15<br />

14<br />

0.74 %Al<br />

1.35 %Al<br />

3.38 %Al<br />

13<br />

12<br />

11<br />

10<br />

0 100 200 300 400 500 600 700 800<br />

time (s)<br />

Figure 34. Pressure profiles under 50% (v/v) H 2 :He atmosphere.<br />

Table 7. Percent hydrogen values for 50% (v/v) H 2 :He in the Parr reactor.<br />

Mole % Al P H2 , atm. Weight % H<br />

0.74 6.82 0.84<br />

1.35 8.33 1.11<br />

3.38 8.88 1.04<br />

Hydrogen capacity was higher in all samples when they were hydrided using the 50%<br />

(v/v) H 2 :He. Since the samples were analyzed using H 2 first, the increased percent<br />

hydrogen may indicate the samples were further activated by the first<br />

hydriding/dehydriding cycle.<br />

73

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