Hydrogen separations with metal hydrides

Hydrogen separations with metal hydrides can be viewed as complementary technology to cryogenic and adsorption (PSA) processes. Attributes of this new process are listed in Table II,... 

At present metal hydrides, owing to their unique properties, find applications (Figure 2) in many fields of science and technology, associated with hydrogen storage, thermal compression, separation, electrochemistry, switchable mirror, etc. 

In the H-NMR spectra of 12 and 13, separate signals in the Si—H region and in the metal hydride region are observed (57). The molecules are therefore not fluxional on the NMR time scale with respect to hydrogen... 

Sandia s design thermally actuates an exothermic reaction of metal hydride with water to generate the hydrogen on board the microsystem. The pressure created by this reaction and the low viscosity of the hydrogen enable the high flow rate of the mobile phase, which, in turn, enables the desired 2 -second chromatographic separation. 

This chapter will first explain the theory of destabilisation and then move on to look at specific examples starting with the destabilisation of complex hydrides with separate sections devoted to different classes of destabilisation agents first metal hydrides, then non-hydride systems (where either an element or alloy which does not hydride or an inorganic salt is added as the destabilisation agent) and finally attempts to use another complex hydride to form a destabilised multicomponent system. The penultimate section summarises the work reported on other multicomponent hydrogen storage systems, predominantly the destabilisation of binary hydrides by other elements, and the chapter is concluded with an outlook of potential future research. 

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