Hydrogen storage capability

Develop viable on-board hydrogen storage capable of 300-miles per tank ... 

Prominent examples of the pcu nets are a series of metal-organic frameworks prepared by Yaghi et al., of which an example is shown in Figure 5.22 [401-These show remarkable porous properties such as methane and hydrogen storage capabilities, see also Figure 1.7 We also want to mention a porphyrine based pcu net [411. 

An important prerequisite for nickel/metal hydride batteries was the development of alloys that absorb and desrob hydrogen at a suitable pressure and simultaneously can act as a catalytic surface. The possibility to store hydrogen is known for a number of metals. Palladium, for example, absorbs between 0.4 and 2wt% of hydrogen. This means that 1 cm palladium is able to store up to 0.24 g of H2, which corresponds to 2800 cm of gaseous H2 at 25 °C and 1 atm. This demonstrates the enormous hydrogen storage capability of such metals. 

The TPD unit was constructed at the Signal UOP Research Laboratory. It Includes a Carle 111 H gas chromatograph with Pd/Ag hydrogen separator, Leeds Northrup temperature programmer, Bascom-Turner 8000 series recorder with data processing and storage capabilities and a custom designed quartz reactor. 

This could have far-reaching consequences, as mechanically induced disorder can be a factor in activation of well-ordered intermetallic compounds (alloys) for reversible reactions with molecular hydrogen. Figure 1.20b shows the PCT plots, which details hydrogen sorption properties for B2-type FeTi, an important hydrogen storage alloy with capability for reversible storage at room temperature applications. The plateau of equilibrium sorption is lowered in ball milled, disordered FeTi in comparison with the not-milled counterpart. Therefore, the alloy has been... 

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