Gaseous hydrogen storage

In a liquid hydrogen fuel storage tank the gaseous hydrogen vaporizes and fills the empty volume inside the tanks. This hydrogen is not combustible since there is no oxygen present. In gasoline or other hydrocarbon fuel tanks, air fills the empty volume of the tanks and combines with vapors from the fuel to produce a combustible mixture. 

These variables are used to determine costs associated with hydrogen compression for both types of gaseous storage using a multistage compressor. The energy required (kW) for isothermal compression is a function of the production rate as well as the inlet and outlet pressures... 

An alternative to gaseous and liquefied storage of hydrogen is storage as a solid, in the form of a metal hydride. 

The total cost of rail transport is determined by two costs capital and freight, which includes such variables as the rail conductor wage. The default assumption is that each railcar gaseous storage container costs 200 000 and has a capacity of 450 kg of hydrogen. An important variable is the required number of trips, which is a function of the annual production rate and the capacity of the hydrogen railcars. The required number of trips then is used to determine the total delivery time, number of railcars, and ultimately the total capital cost. Total delivery time, which includes the return time of the railcars, is found using... 

A fuel gas under pressure which may be hydrogen, towns gas, acetylene or propane. With special nozzles, low-pressure acetylene or butane can be used, but it is not common practice. The use of single cylinders of fuel gas is now giving way (except under site conditions) to the gases drawn from bulk liquid storage. All modern installations use flowmeters in the gaseous feeds. 

---