Hydrogen Cars! Why does not pollute! Already ... Though.
first point. The combustion of hydrogen produces no carbon dioxide (a greenhouse gas). However, produces more smog, caused by oxides of nitrogen. The production of these gases is linked to all the high-temperature combustion and is caused by the reaction of nitrogen from the air. The air is in fact made up mostly of nitrogen (80%). You could however say that hydrogen can be reacted at a low temperature fuel cells with the famous. This is true in which case it would be really free of emissions. There is' however be noted that fuel cells using other less hazardous substances, including phosphoric acid.
second point. But hydrogen to put in the tank where it is? I do not think there are mines. Sure, it might be pulled from the water, but the energy that is needed is greater than that obtained and therefore it is not convenient. Another strategy is the so-called reforming of methane, which is to make it burn with little air. Thus forming hydrogen and carbon monoxide (very poisonous!). Then he adds steam and carbon monoxide is transformed into hydrogen and carbon dioxide. Yield: 65%. Hydrogen fuel cell in a yield of 60%. Overall, it is as if the original was used with methane yield by 36%, then that is the performance of a small generator to natural gas. In short, many laps do not get any benefit!
So why talk about it? Because if there was demand for hydrogen could use nuclear energy, the power plant. At night, in fact, today we do not know where to put it. Tomorrow you might think of using it to convert methane into hydrogen, and so would fail one of the biggest obstacles to the spread of nuclear plants. In short, the hydrogen car is the red herring that would allow development of a nuclear-related economic interests.
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