Design, Scale-Up, and Integration of an Ammonia Electrolytic Cell with a Proton Exchange Membrane (PEM) Fuel Cell
The design and performance of an alkaline ammonia electrolyzer for hydrogen production and its feasibility for fuel cell applications is presented. Pt based C-paper electrodes were used in the ammonia electrolytic cell (AEC). The separator electrode assembly design (SEA) for the AEC comprised of end plates, end electrode plates, separator plates, the Pt-Ir electrodes, gaskets, and the membrane/separator. The operating procedure for the designed electrolyzer was established. The electrochemical performance of the 9-cell AEC was evaluated at 25°C and 55°C. A Faradaic efficiency of 97.55 ± 0.04 % was obtained on the hydrogen gas produced from the designed electrolyzer. Including the prevailing ohmic losses, a net energy of 4.10 ± 0.97 W h g-1H2 and 6.10 ± 0.97 W h g-1H2 with an energy conversion efficiency of 23.62 ± 0.36 % and 39.71 ± 0.69 % at 25°C and 55°C respectively were achieved from the AEC-PEM fuel cell integration. The results prove the scalability and potential of ammonia electrolysis as a novel and alternative hydrogen production process for PEM fuel cell applications, which would help realize the goal of green hydrogen economy in true sense.
School Location:USA - Ohio
Source Type:Master's Thesis
Keywords:ammonia electrolysis electrolyzers proton exchange membrane pem fuel cells hydrogen generation electrocatalyst
Date of Publication:01/01/2007