Fundamental Safety Testing and Analysis of Hydrogen Storage ...

Thermodynamics of Water Contact
Water Hydrolysis Possibilities
• 2LiBH 4 + MgH 2 + 10H 2 O (l) LiOH + 2B(OH) 3 + 2Mg(OH) 2 + 10H 2(g)
• 2LiBH 4 + MgH 2 + 6.5H 2 O (l) LiOH + 0.5Li 2 B 4 O 7 + Mg(OH) 2 + 10H 2(g)
• 2LiBH 4 + MgH 2 + 6H 2 O (l) 2LiBO 2 + Mg(OH) 2 + 10H 2(g)
ΔH 373 = -804 kJ/mole formula unit
ΔG (kJ/Mole)
2LiBH4+MgH2+10H2O(l)=2LiOH+2B(OH)3+Mg(OH)2+10H2(g)
2LiBH4+MgH2+6.5H2O(l)=LiOH+0.5Li2B4O7+Mg(OH)2+10H2(g)
2LiBH4+MgH2+6H2O(l)=2LiBO2+Mg(OH)2+10H2(g)
-900
-950
-1000
-1050
-1100
-1150
-1200
-1250
0 50 100 150 200 250
T (C)
Based on available
thermodynamic data in
JANAF database