HYDROGEN STORAGE – METHODS OF HYDROGEN STORAGE
Hydrogen’s energy content by volume is low. This makes hydrogen storage a challenge because it requires high pressures, low temperatures, or chemical processes to be stored compactly. Overcoming this challenge is important for light-duty vehicles because they often have limited size and weight capacity for fuel storage.
The storage capacity for hydrogen in light-duty vehicles should enable a driving range of more than 300 miles to meet consumer needs. Because hydrogen has a low volumetric energy density compared with gasoline, storing this much hydrogen on a vehicle currently requires a larger tank than most conventional vehicles.
Three possible solutions have been proposed. These potential hydrogen delivery systems include compressed tube trailers, liquid storage tank trucks, and compressed gas pipelines. One major disadvantage of each system is the high capital costs.
METHODS OF HYDROGEN STORAGE
-Indefinite storage time
-Easy to use
|-Higher capital and operating costs
-Heat can cause container rupture
|Liquid||High density at low pressure||-High cost
-Low temperatures needed
-Escape can cause fire or asphyxiation
|Metal Hydride||-High volume efficiencies
-Heavy storage tanks
TYPES O METAL HYDRIDES USED IN HYDROGEN STORAGE
|Metal||Hydride||% Hydrogen by mass||Equilibrium Pressure (bar)||Equilibrium Temperature (K)|