Novel technique for characterizing hydriding and dehydriding kinetics: pressure programmed absorption and desorption

G. URRETAVIZCAYA; V. FUSTER; F.J. CASTRO

REVIEW OF SCIENTIFIC INSTRUMENTS

American Institute of Physics

Lugar: New York; Año: 2005 vol. 76 p. 1 - 4

0034-6748

A novel technique to measure hydrogen absorption and desorption kinetics of hydride forming materials is presented. The method is based on the measurement of the isothermal hydriding or dehydriding rate under controlled increasing or decreasing pressure ramps. The main advantages of this technique are the avoidance of the blind period during the initial absorption or desorption stages, and the possibility to perform consecutive hydriding and dehydriding cycles. The most important characteristics of the technique are illustrated by analyzing the Pd-H and Mg-H systems.