title: 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.
authors: Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
authors: Marta C
authors: MC
authors: Hatzell
authors: Ivan
authors: I
authors: Ivanov
authors: Roland D
authors: RD
authors: Cusick
authors: Xiuping
authors: X
authors: Zhu
authors: Bruce E
authors: BE
authors: Logan