Sean-Thomas B. Lundin*, Thomas F. Fuerst, Jason C. Ganley, Colin A. Wolden, J. Douglas Way
Department of Chemical and Biological Engineering, Colorado School of Mines, USA
NH3 Fuel Conference, Los Angeles, September 19, 2016
ABSTRACT
It is well known that ammonia is being considered as a method of storing hydrogen. Although some fuel cells are being developed that can use ammonia directly as a fuel source, many fuel cell technologies still require an outside cracker to revert ammonia back into hydrogen for efficient use. In this regard, hydrogen permeable membranes, such as Pd and its alloys, have been targeted as potential membrane reactors in which the ammonia is cracked while the hydrogen is simultaneously separated. Pd and its alloys are expensive, but offer potentially perfect hydrogen purity that is highly preferable for certain fuel cells susceptible to ammonia poisoning. Yet, cheaper metals, such as V, Nb and Ta, may offer a more affordable alternative while maintaining perfect hydrogen selectivity. The first part of this talk will involve our work on ammonia decomposition using both Pd-based membranes and the cheaper V, Ta or Nb metals. Continue reading →