Ammonia-Based Hydrogen Source for Fuel Cell Applications
APPLIED RESEARCH ASSOCIATES INC TYNDALL AFB FL
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Generation of hydrogen from the reaction of ammonia NH3 with magnesium hydride MgH2 was studies. Experiments were conducted at near ambient temperatures 75-150 deg C, which are lower than that required by ammonia cracking andor metal hydride thermal decomposition reactions. Effects of selected catalystspromoters for the production of hydrogen by the NH3-MgH2 reaction were evaluated. Addition of ammonium chloride NH4Cl accelerated the NH3-MgH2 reaction. MgH2 doped with either PdCl2 or PtCl4 also showed increased reactivity towards NH3 for H2 production in the presence of NH4Cl. Results from this study demonstrated the feasibility of hydrogen production from ammonia-based reactions in support of potable hydrogen fuel cells. These preliminary results warrant further systematic studies to elucidate the activation mechanism of PdCl2 or PtCl4 as catalysts, as well as the role of NH4Cl as an additive, a reactant andor a catalyst in the reaction system of interest.
- Inorganic Chemistry
- Physical Chemistry
- Electrochemical Energy Storage