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Light weight metal or complex hydrides offer the potential for a safe and energy efficient hydrogen storage alternative for stationary as well as mobile applications. Highest energy efficiencies, however, are achievable only if both working temperature and the reaction enthalpy of the respective hydrogen sorption process can be attuned to the accompanying hydrogen consuming process in such a way that the required heat for hydrogen release of the hydride can be provided by the corresponding waste heat [1]. Since the kinetic optimisation of novel high capacity hydrides as well as the tailoring of reaction enthalpies is an important research task. One way to do this is to combine different hydrides which react during decomposition in an exothermal way with each other and thereby reduce the value of reaction enthalpy while maintaining the average of the hydrogen capacities of the single hydrides. In parallel to such materials development and optimization activities upscaling of novel high capacity materials has to be demonstrated and tank concepts based upon these have to be investigated and optimized. Reactive Hydride Composites like combinations of MgH2 with M(BH4)x (M being Li, Na or Ca) show significantly reduced values of reaction enthalpies as well as improved aband desorption kinetics compared to the pure borohydrides. Furthermore, due to their high reversible gravimetric storage capacities of up to 11 wt.% they are interesting candidates for future hydrogen storage applications. In this presentation, recent results concerning reaction mechanisms, thermodynamic properties and sorption behaviour, cycling stability of borohydrides and Reactive Hydride Composites are presented. The progress in the optimisation of reaction kinetics reached so far will be described. Function and suitability of additives as potential catalysts on hydrogen aband desorption will be discussed. MS13-O3 Investigating Repeated Gas adsorption in zeolites for solar cooling applications. Marco Milanesio, Luca Palin, Davide Viterbo, Wouter van Beek, Dmitry Chernyshov, Atsushi Urakawa, Rocco Caliandro Dipartimento di Scienze e Tecnologie Avanzate and NanoSistemi IC, Universita del Piemonte Orientale, Via Michel 11, Alessandria, 15121, Italy; Swiss-Norwegian Beamlines at ESRF, BP 220, Grenoble, 38043, France; Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans, 16, Tarragona, E-43007, Spain; Institute of Crystallography, CNR, via Amendola, 122/o, Bari, 70126, Italy E-mail: marco.milanesio@unipmn.it

Characterization of hydrogen storage materials both at the laboratory level and at the scale for prototype tanks