Absorbed capacity on hydrogen

Abstract. The interaction of hydrogen with spherical particles of an alloy such as BT5-1 containing 92.05 mass% of Ti, 4.52mass% of A1 and 3.43 mass% of Sn with diameters of particles of 0.1, 0.4, 0.6 and 0.8 mm was investigated at temperatures of 773-973 K and pressure of 1-6 MPa. It was shown that the alloy has the lower absorbed capacity on hydrogen in comparison with titanium and thermal stability of the hydrogenated alloys is lower than a stability of titanium dihydride. 

Keywords Titanium alloy with aluminum and tin Spherical particles Thermal stability Absorbed capacity on hydrogen... 

A remarkable adsorption capacity on high surface area ACs under a hydrogen pressure has been reported for the first time at the beginning of the 1980s [55,56], Whereas hydrogen is absorbed in the interstitial sites of metallic alloys, the main storage mechanism in carbon materials is the adsorption in micropores [57,58], Depending on the authors, theoretical studies found that the optimum pore... 

Properties Soft, silver-white solid oxidizing rapidly in air waxlike at room temperature, brittle at low temperatures. Store in airtight containers or in naphtha or similar liquid that does not contain water or free oxygen. D 0.9674 (25C), mp 97.6C, bp 892C. Decomposes water on contact, with evolution of hydrogen to form sodium hydroxide insoluble in benzene, kerosene, and naphtha. Has excellent electrical conductivity and high heat-absorbing capacity. 

Lan] suggested equations for the determination of the thermodynamic variables in the Co-Fe-Si system on the basis of its gas (hydrogen) absorbing capacity. [1991Nis] presents an experimental study of the interaction parameter for carbon in Co-FeSi system in iron rich alloys. 

The comparison of experimental data on adsorption of various particles on different adsorbents indicate that absorbate reaction capacity plays a substantial role in effects of influence of adsorption on electric conductivity of oxide semiconductors. For instance, the activation energy of adsorption of molecular oxygen on ZnO is about 8 kcal/mole [83] and molecular hydrogen - 30 kcal/mole [185]. Due to such high activation energy of adsorption of molecular hydrogen at temperatures of adsorbent lower than 100 C (in contrast to O2) practically does not influence the electric conductivity of oxides. The molecular nitrogen and... 

The MH materials used for a Ni/MH battery electrode must satisfy an extensive list of requirements. The electrochemical capacity of a hydride electrode depends on the amount of reversibly absorbed hydrogen in the hydriding material, and consequently, the energy storage capacity of the battery. It is desirable to have a high electrode storage capacity that is electrochemically reversible. 

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