Complete Modeling of the Hydrogen Stored in a Spherical Cavity

Abstract

Hydrogen is the lightest of gases and possesses the lowest density. However at ambient temperature and pressure it occupies a large volume. This necessitates compressing it at high pressures up to 800 Bars to minimize the volume. The immense interest generated by hydrogen comes from the fact that it has the best energy per weight ratio of all fuels and the ecological nature of the combustion product. From the pedagogical point of view, it is also the most taught and involved in research, in particular in quantum mechanics. This aspect is treated in this article in order to

Hydrogen Technology, a Short Overview

“…❖ Expensive to store by Physical Compression until liquefication, as it needs to reach 5,000 psi in a conventional tank [15] ❖ Preventative maintenance of the pressure release mechanism [15] (valve) in conventional tanks to avoid thermal incidents ❖ Inefficient from a displacement standpoint as, given that 852L of H2 gas compress to approximately 1L of liquid H2 [12], it would require quite a large tank in order for a significant amount of Energy to be stored…”

“…❖ Low pressure Hydrogen [12] is inserted to the metal-hydride powder filled cylinder [13][14] ❖ Cooling is applied while low-pressure H2 is being inserted [16] ❖ After the cylinder fills up, the cylinder is heated with a temperature differential of at least 303,3 K (As the ΔΤ rises, so does the compression ratio) [15] ❖ Heating continues as high-pressure Hydrogen is exerted[…”

“…❖ Absorbtion of Hydrogen atoms as well as any impurities within the composite's spaces [14] ❖ Safe delivery of Hydrogen at a constant pressure value [12][13][14][15][16] ❖ The total amount of stored Hydrogen could account for 1% -7%, depending on the thermal exposure ❖ Life expectancy is directly affected by the -to be stored-Hydrogen purity (Industrial Electrolysers produce with a 99.8% purity rate) Figure 14 : Hydrogen storage pathways, Source: hydroville.be…”