4.7 Article

Thermodynamics of the cyclic formate/bicarbonate interconversion for hydrogen storage

期刊

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 73, 页码 31370-31380

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.07.033

关键词

Formate; Bicarbonate; Hydrogen; Hydrogen storage; Hydrogen economy; Thermodynamics

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Aqueous formate/bicarbonate solutions are being studied as a safe system for hydrogen storage, and researchers have investigated catalytic systems to improve salt interconversion. Thermodynamic calculations were carried out to determine the maximum storage capacity of the system, and the influence of operating conditions was analyzed. The most promising configurations were simulated for experimental benchmarking and future development.
Aqueous formate/bicarbonate solutions are gaining special attention as a promising sys-tem for intrinsically safe hydrogen storage. In the last years, a growing number of papers are investigating catalytic systems to enhance salts interconversion at near-ambient conditions. In this work, we present detailed thermodynamic calculations to clarify the maximum storage capacity of such a system. The model is validated against experimental results reported in the literature and the influence of operating conditions is addressed. Based on the results, the performances of the most promising configurations are simulated for experimental benchmarking and future technological development. Thermodynamic limitations show that maximum volumetric density is lower than traditional physical -based H2 storage, but with considerable advantage from a safety point of view.(C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

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