In agreement with our previous results [7,8], the thermochemical
regeneration of NaBH4 was performed in isothermal
conditions at 558, 584, 611 and 634 C.H2 pressures ranged from
2 to 31 bars. The NaBO2:Mg molar ratio (S) has been fixed at 1:6.
A sufficient reaction time (from 5 to 10 h) was considered in order to have a good set of data for fitting. Pressure drops at
isotherms DPH2 ðTisot; tÞ are presented by solid dots in Fig. 3. At
2e12 bars, the pressure drops reached equilibrium within the
investigated reaction time allowing to detect the maximum
pressure drops. With higherH2 pressure the reactions have not
completed within the measuring period.