Tuesday, October 14, 2008

HYDROGEN AS AN ENERGY CARRIER

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Why is hydrogen used as a fuel?
Hydrogen has the highest energy content per unit weight of any known fuel-52,000 Btu/lb (120.7 kJ/g). It burns cleanly. When hydrogen is burned with oxygen, the only byproducts are heat and water. When burned with air, which is about 68% nitrogen, some oxides of nitrogen are formed. The process of converting hydrogen to energy using engines or fuel cells is much more efficient than the comparable gasoline counterparts.

Sources
U.S. Department of Energy
National Hydrogen Association

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