On the hydrogen storage properties and life cycle evaluation of a room temperature hydride for scale-up applications: The case of an AB2-alloy
Julián Puszkiel, A.M. Neves, J. Warfsmann, P.S. Krause, Tobias Kaufmann, A. Robelo Hoberg, Oliver Hegen, A. Kötter, Thomas Klassen, Julian Jepsen
Abstract
In this work, 1.25 t of AB 2 -commercially available hydride-forming alloy is taken as a case study for material selection for large-scale systems. Systematic experimental characterizations, modeling, and life cycle-cost assessment at this industrial scale are performed. Based on the thermodynamic characterization, the equilibrium pressure is calculated by applying the most used Nishizaki and novel 3D representation with 2D-bilinear interpolation approaches, giving accurate values. The kinetic model is comprehensively and successfully developed in a wide range of temperatures and pressures by applying the separable variable method. Life cycle assessment shows that the CO 2 emissions of these kinds of systems can be minimized by increasing the share of recycled material and by using waste heat sources for dehydrogenation . The economic analysis clarifies the influence of the components on the economic viability of large hydride-based systems for emergency power supply. Finally, guidelines are proposed for the development of hydride-based integrated renewable energy systems .