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Issue 4, 2014
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Comparison of hydrogen production and electrical power generation for energy capture in closed-loop ammonium bicarbonate reverse electrodialysis systems

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Abstract

Currently, there is an enormous amount of energy available from salinity gradients, which could be used for clean hydrogen production. Through the use of a favorable oxygen reduction reaction (ORR) cathode, the projected electrical energy generated by a single pass ammonium bicarbonate reverse electrodialysis (RED) system approached 78 W h m−3. However, if RED is operated with the less favorable (higher overpotential) hydrogen evolution electrode and hydrogen gas is harvested, the energy recovered increases by as much ∼1.5× to 118 W h m−3. Indirect hydrogen production through coupling an RED stack with an external electrolysis system was only projected to achieve 35 W h m−3 or ∼1/3 of that produced through direct hydrogen generation.

Graphical abstract: Comparison of hydrogen production and electrical power generation for energy capture in closed-loop ammonium bicarbonate reverse electrodialysis systems

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Supplementary files

Article information


Submitted
16 Oct 2013
Accepted
26 Nov 2013
First published
26 Nov 2013

Phys. Chem. Chem. Phys., 2014,16, 1632-1638
Article type
Paper

Comparison of hydrogen production and electrical power generation for energy capture in closed-loop ammonium bicarbonate reverse electrodialysis systems

M. C. Hatzell, I. Ivanov, R. D. Cusick, X. Zhu and B. E. Logan, Phys. Chem. Chem. Phys., 2014, 16, 1632
DOI: 10.1039/C3CP54351J

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