Y. Kojima, T. Haga
Sep 1, 2003
Citations
3
Influential Citations
222
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Journal
International Journal of Hydrogen Energy
Abstract
Abstract Sodium borohydride ( NaBH 4 ) was synthesized by reacting sodium metaborate ( NaBO 2 ) with magnesium hydride ( MgH 2 ) or magnesium silicide ( Mg 2 Si ) by annealing (350– 750° C ) under high H 2 pressure (0.1– 7 MPa ) for 2– 4 h . As the temperature and the pressure increased, the yield increased to have a maximum value (97–98%) at 550° C under 7 MPa , but the value was independent of time. A concept for converting NaBO 2 back to NaBH 4 using coke or methane is described.