EVALUATION OF THE EFFECT OF TEMPERATURE, AIR EXPOSURE AND GAS MIXTURE ON Pd82-Ag15-Y3 FOR HYDORGEN SEPARATION

Abstract

Hydrogen permeation and separation properties of a ternary Pd-alloy are evaluated at temperature and pressure range of 300 °C and 600 °C and 2-5 bar (abs), respectively. The membrane Pd82-Ag15-Y3 is unsupported, prepared by cold rolling and it is characterized by ~ 35 μm of thickness. The membrane shows good thermal and chemical stability when exposed to air and at different temperature. In particular, its surface area increases by 2.5x from room temperature to 600 °C indicating a potential improvement of hydrogen permeation. The permeation characteristics of the membrane and the effects of the other gases on hydrogen permeation will be investigated by varying temperature and pressure evaluating the effects of dilution, depletion, concentration polarization, and competitive adsorption on the H2 permeating flux. © 2022 Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2. All rights reserved.