Hydrogen hydride storage

Key words Hydrogen Storage/Hydriding Time/Mathematical Model/Heat And Mass... 

Hydrogen-storage alloys (18,19) are commercially available from several companies in the United States, Japan, and Europe. A commercial use has been developed in rechargeable nickel—metal hydride batteries which are superior to nickel—cadmium batteries by virtue of improved capacity and elimination of the toxic metal cadmium (see BATTERIES, SECONDARYCELLS-ALKALINe). Other uses are expected to develop in nonpolluting internal combustion engines and fuel cells (qv), heat pumps and refrigerators, and electric utility peak-load shaving. 

D. M. Cavagnaro, Hydrogen Storage, Pt. 2 Hydrogen as a Hydride, NTIS, Springfield, Va., 1978. A bibHography with abstracts. 

One of the principal advantages of hydrides for hydrogen storage is safety (25). As part of a study to determine the safety of the iron—titanium—manganese metal hydride storage system, tests were conducted in conjunction with the U.S. Army (26). These tests simulated the worst possible conditions resulting from a serious coUision and demonstrated that the metal hydride vessels do not explode. 

A relatively simple set of rules have been found to hold for all intermetallic hydrides useful for hydrogen storage [11]. They may be stated as follows ... 

Titanium nitride-based nanoparticles are also efficient dopants for NaAlH4 in hydrogen storage applications [12, 13]. The black solid TiN powder can be dispersed into the hydride via ball milling. Addition of titanium nitride-based na-... 

The alloy powder (used in hydrogen-storage systems) may ocasionally be pyrophoric after hydriding-dehydriding operations, igniting when placed on a combustible surface (e.g. weighing paper). 

Metal Hydride Requirements for Hydrogen Storage for Mobile Applications... 

A comparison between different metal hydrides used for hydrogen storage is given in Figure 11.2 [31]. 

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