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Publication
Metal hydride-based hydrogen production and storage system for stationary applications powered by renewable sources
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Advisor(s)
Abstract(s)
ABSTRACT: In this work, a compact and low-cost electrochemical laboratory prototype for the storage and production of hydrogen, based on metallic hydrides, with high reversibility in the charge/discharge process is demonstrated, using electricity either from the grid or by direct coupling to renewable energies as power source. The reactor is a 316 L stainless steel vessel with a capacity up to 15 bar internal pressure. It includes working electrodes of alloy LaNi4.3Co0.4Al0.3 and counter-electrodes of Ni foam in an electrolyte solution of 35% KOH. The reactor uses unicellular/multicellular configurations, so that the overall capacity of the system can be extended by increasing the number of working electrodes, resulting in a highly modular system. Results show excellent linearity, reversibility, and stability under cycling at room temperature and pressure, demonstrated either when powered by the grid or by off-grid renewable energy. Furthermore, criteria were established for the quantification of the state of full charge and full discharge. The system was integrated with a custom electronic system, developed inhouse for monitoring and control the reactor and to optimize the performance and energy efficiency of the hydrogen storage and discharge processes.
Description
Keywords
Hydrogen production Renewable energies Metallic hydrides
Citation
Rangel, Carmen M... [et.al.] - Metal hydride-based hydrogen production and storage system for stationary applications powered by renewable sources. In: Renewable Energy, 2022, vol. 197, p. 398-405
Publisher
Elsevier