Issue 4, 2014

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

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

Supplementary files

Article information

Article type
Paper
Submitted
16 Oct 2013
Accepted
26 Nov 2013
First published
26 Nov 2013

Phys. Chem. Chem. Phys., 2014,16, 1632-1638

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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