Hydrogen stations can support mass transit vehicles such
as buses and light-duty fuel cell vehicles such as cars.
Two main fuel grades are available at hydrogen stations.
The grades are not categorized by octane content as with
gasoline but by their nominal pressure.
H35 and H70, each described in megapascal (MPa), are
the two predominant pressures available at public hydrogen
Typically, the higher the nominal pressure rating of the
vehicle, the farther the driving range of the car.
H70 light-duty vehicles can provide some 300 miles of
range with a full tank of hydrogen.
The nominal refueling time is 3 to 5 minutes, although
time can vary depending on factors that affect ;ll rates.
Hydrogen stations ;ll cars with gaseous fuel vs. a liquid
one, but refueling with hydrogen is similar to refueling with
gasoline. Many existing hydrogen stations look and feel like
traditional gasoline stations, and many hydrogen dispensers
have dispenser shells similar to those at gasoline stations.
There are multiple ways to produce hydrogen, but the
primary industrial method is through steam methane
Renewable production pathways such as water electrolysis and biogas reforming also exist.
Biogas is a renewable source of energy that is generated from biomass through anaerobic digestion. The
extracted biogas can be used in various ways to enable
renewable hydrogen production.
Keith Wipke, fuel cell and hydrogen technologies laboratory
program manager at NREL, explains how the national lab makes
hydrogen for use during its fuel cell vehicle tests and experiments.
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