by eamarquardt » Wed Mar 28, 2012 4:18 pm
Hydrogen is a nice, clean, and in some respects safe fuel. It burns hot and cleaner than any other fuel as its only combustion product is water vapor.
It has several drawbacks. First it is a gas (unless really cooled and compressed) so it takes up more room for its energy potential than the amount of gasoline that will produce the same amount of power. Second the vessels used to contain hydrogen are pressurized to thousands of pounds per square inch pressure or are cooled pretty close to absolute zero. Leaks can be a big problem at the temperatures and pressures involved. Leaks, as with virtually any fuel, can result in explosions Finally elemental hydrogen isn't abundant in nature. There is lots of it around but is is almost always part of a larger molecule. To produce hydrogen you have to break down an existing molecule (like water or oil) to produce the hydrogen gas. This takes more energy than you'll get when you burn the hydrogen so it's not cost effective at this point in time.
The most common ways to produce hydrogen are using electricity (electrolysis) or by processing oil and getting the hydrogen from oil. Getting hydrogen from oil isn't great as you're still dependent on oil and still releasing CO2 into the atmosphere. Producing hydrogen from water (electrolysis) takes a considerable amount of electricity and, as noted above, uses more energy than you'll get when you burn the hydrogen.
If and when we get to a point where we can generate copious amounts of electricity from sources other than fossil fuels we should be able to move towards an increased use of hydrogen as a "portable fuel". It will require a new distribution infrastructure and considerable "awareness" of the hazards of using super cold or highly compressed gas.
Hope this helps.
Cheers,
Gus
The opinions in this post are my own. My comments are directed to those that might like an alternative approach to those already espoused.There is the right way,the wrong way,the USMC way, your way, my way, and the highway.
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