Experimental studies on LaNi4.25Al0.75 alloy for hydrogen and thermal energy storage applications

Reversible exothermic and endothermic reactions between metals/alloys and hydrogen gas provide great opportunity to utilize various thermal energy sources such as waste heat, industrial exhaust, and solar thermal energy. Metal hydrides with favourable properties to operate at medium temperature heat (about 150 & DEG;C) are limited, and studies on hydrides in this temperature range are scarce. Hence, the present study aims at experimental in-vestigations on LaNi4.25Al0.75 alloy in the temperature range of 150 & DEG;C-200 & DEG;C. A novel cartridge type of reactor is employed to investigate the hydrogen storage characteristics and thermal storage performance of this alloy. LaNi4.25Al0.75 is found to have a hydrogen storage capacity of about 1.20 wt% at 10 bar and 25 & DEG;C. In addition, it can store a total thermal energy of 285.7 kJ.kg ⠄1 MHand can deliver heat at an average rate of 287.5 W.kg ⠄1 MHat an efficiency of 64.1%. & COPY; 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

This study investigates the hydrogen storage characteristics and thermal storage performance of LaNi4.25Al0.75 alloy in the temperature range of 150°C-200°C. The alloy exhibits a hydrogen storage capacity of 1.20 wt% and can store a total thermal energy of 285.7 kJ.kg-1 and deliver heat at an average rate of 287.5 W.kg-1 with an efficiency of 64.1%.