Hydrogen cylinders

Metal hydrides are excellent in storing hydrogen when space is limited. When compared to the conventional high-pressure cylinders, hydrogen stored in a metal hydride occupies... 

Volumetric flow is regulated by throttling a diaphragm-type control valve in this nonlubri-cated, vertical, three-stage, two-cylinder hydrogen compressor. (Courtesy of Koehler and Hoerter GmbH.)... 

The ethyl, w-propyl, n-butyl and allyl iodides were commercial products, carefully purified before use, while the other iodides were prepared and purified by standard methods. Cylinder nitrogen was freed from oxygen by passage over sodium at 350°, and cylinder hydrogen was purified by passage through a palladium thimble. Pure nitric oxide was made by the method of Giauque and Johnston. 

Protective atmospheres based solely on the H2O-H2 gas system are hardly used outside the laboratory. As may be seen from Figure 11.4, however, both nickel and iron can be protected at all temperatures in hydrogen containing 10% H2O and so, for laboratory use, cylinder hydrogen, usually containing a few parts per million of water vapour, can be used without further purification. 

Hydrogen gas compressors, dryers and filling in cylinders Hydrogen is stored in cylinders at high pressure Serious fire/explosion issues in case of leak Shall be no naked flame in plant provide only flameproof fittings... 

Anhydrous hydrogen fluoride is also available in cylinders, and aqueous hydrogen fluoride, either 50% or 70%, is also shipped in polyethylene bottles and carboys. Typical product specifications and analysis methods are given in Table 4. 

Silane. Silane is a colorless gas that is spontaneously flammable in air and slowly decomposed by water in the presence of aqueous alkah it is completely hydrolyzed to form hydrogen and siUcates. It is manufactured on a commercial scale and sold as a compressed gas in cylinders. It is prepared by the reaction... 

Fig. 2. Iron—titanium hydride vessel (508 kg hydride, 6.4 kg hydrogen) performance of the Provo-Orem (Utah) bus at 3.4 MPa (493 psi) charge pressure, having 22 cylinders, each with a 75 mm dia and 1750 mm length, where (-) indicates tank pressure. To convert MPa to psi, multiply by 145. See text.

Problems associated with the implementation of a direct cylinder injection system are (/) the injection of the hydrogen gas must be carefully... 

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