The most likely spot for a hydrogen fuel tank on any possible car that will be built is going to be on the top of the car. This would prevent you from becoming part of the fuel burn in an accident. The fuel would flow up and away from the people involved.
They would not be any more dangerous because of the fuel they were carrying. The technology may still be unlikely to go into this direction because they provide no real advantage at the moment over gas or diesel powered cars. Hydrogen would not provide any real savings in terms of fossil fuel reduction or savings from a pollution standpoint.
The current method of making hydrogen is to strip it from natural gas.
it squirts hydrogen throgh a fuel cell to make electricity to power the car
The success of the hydrogen car is because the the hydrogen fuel cell. This cell converts hydrogen into electricity and powers the car and the only byproduct is heat and water.
Generally, a Hydrogen powered car runs by using hydrogen and oxygen to create electricity in a fuel cell, which is then used to power an electric traction motor that runs the car. Direct ignition-engines are more difficult and dangerous to 'run'.
Advantages are very low emissions. Disadvantage is rarity of hydrogen fuel stations.
Hydrogen fuel cell cars seem to be the wave of the future. This website gives you links to all of the dealers with available hydrogen fuel cell cars: http://www.fueleconomy.gov/feg/fcv_links.shtml
A fuel cell car would be defined as a vehicle with an electric motor or engine that uses a fuel cell to produce electricity to power its motor with hydrogen.
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Neither car is available and most likely will not be for some time, if ever. Fuel cell technology is probably closer to a reality. The major disadvantage is that they produce no fuel savings and are not a positive for our environment. Hydrogen is derived by stripping it from natural gas. The net result is that we use fossil fuel to power the fuel cell car.
The amount of hydrogen needed to drive a hydrogen fuel cell car varies based on the car model and its fuel efficiency. On average, a hydrogen fuel cell car may require around 1 to 1.5 kilograms of hydrogen per 100 kilometers.
A fuel cell operates on the principle of reversing the process of electolysis of water. The fuel cell recombines hydrogen and oxygen to create energy and water.