chapter  23
4 Pages

Chemical Hydrogen Storage

BySesha S. Srinivasan, Prakash C. Sharma, Elias K. Stefanakos, D. Yogi Goswami

Hydrolysis reactions involve the oxidation reaction of chemical hydrides with water to produce hydrogen. The reaction of sodium borohydride has been the most studied to date.1 This reaction is

NaBH 2H O NaBO 4H4 2 2 2+ → + (23.1)

In the rst embodiment, slurry of an inert stabilizing liquid protects the hydride from contact with moisture and makes the hydride pumpable. At the point of use, the slurry is mixed with water and the consequent reaction produces high-purity hydrogen. The reaction can be controlled in an aqueous medium via pH and the use

CONTENTS

23.1 Chemical Hydrogen Storage ............................................................................................ 703 References ..................................................................................................................................... 705

of a catalyst. While the material hydrogen capacity can be high and the hydrogen release kinetics fast, the borohydride regeneration reaction must take place off-board. Regeneration energy requirements cost and life-cycle impacts are key issues currently being investigated.