REACTION-KINETICS OF HYDROGEN METAL HYDRIDE SYSTEMS

An overview of past papers is presented, which is related to the reaction kinetics of metal hydrides. The experimental procedures, designs of reaction cells, rate equations, reaction mechanisms and thermal effects are discussed. The reaction rates are affected considerably by the design of reaction cell, experimental procedure, history of sample preparation, and number of hydriding/dehydriding cycles. The temperature change of the metal hydride bed caused by exothermal and endothermal reactions is the most influential factor to the intrinsic kinetic behavior. In this paper two technical approaches are proposed to alleviate those thermal effects by designing a highly sensitive reaction cell acting against the abrupt change of the reaction heat and by providing an appropriate experimental technique. © 1990.