What purity of hydrogen is needed to run a hydrogen car?

codes and standards essential for the commercial deployment of hydrogen and fuel cell technologies. ... The U.S. team agreed to use the term “fuel quality” rather than fuel purity and, in addition, define a ...... will also be stop/start cycles of the vehicle as well as aging of fuel cell materials and components. read more

The O2 can be kept or released into the environment. The H2 is of very high purity with this process. There are several processes for splitting water, but electrolysis is relatively easy. It requires that a low voltage (about 1.5 Volts) be passed between electrodes through water. Hydrogen bubbles off of the negative pole, and Oxygen from the positive. read more