Wiki
THE MOST IMPORTANT TERMS ABOUT HYDROGEN
The wiki provides an overview of key terms relating to hydrogen storage and related technologies and terms:
Definition of terms
Hydrogen
Hydrogen gas (molecular formula H₂) is the simplest and lightest element in the periodic table, possessing unique physical and technical properties that make it essential in various applications and research fields. The molecular mass of hydrogen gas is... learn more
Pressure
Low pressure is always beneficial for safety. However, due to the low density of the hydrogen, high pressure is often required for storing or transporting gaseous hydrogen. To enable a low-weight design at high pressure, a carbon fiber-reinforced polymer material is typically used. However, high pressures increase the rate of... learn more
Dehydrogenation
In a saturated hydrogen carrier material, hydrogen atoms are integrated within the lattice structure of the metal hydride. When hydrogen is drawn from storage, the pressure around this saturated solid-state material decreases, creating a pressure differential between the plateau pressure of the metal hydride and the surrounding gas pressure. This differential drives the hydrogen atoms at the interface between... learn more
Safety
Hydrogen safety is related to the fundamental properties of the molecule. Hydrogen has the symbol H and atomic number 1. It forms a diatomic gas (H2) at standard conditions, which is also called molecular hydrogen. Molecular hydrogen is the lightest of all gases with a density 84 gH2/m3 at 15 °C and 1 bar(a). Due to its low density and high diffusivity, the gas disperses rapidly in the air. Since it is lighter than air, it will generally move... learn more
Storage
Hydrogen is an energy carrier with a high energy density per weight, but it is also a light gas. For this reason, the DASH solid-state hydrogen storage systems are a interesting option for the hydrogen infrastructure. In these storages, hydrogen is stored neither in the liquid nor in the gaseous form, but as a... learn more