Jonie Lauria: This Site Might Help You.RE:what is the ignition temperature of hydrogen?I am confused as my teacher marked down my answer which said that hydrogen, even though being a "clean fuel", can not be used in automobiles because it is highly inflammable and has a very low ignition temperature. So is it high or low?? Help!!...Show more
Mildred Pombo: There are a number of web pages which deal with the use of hydrogen as an alternative fuel for car engines. Hydrogen burns with an extremely hot flame. You might find the following interesting: This article deals with fuels for army vehicles of the future:Hydrogen is the lightest element occurring in nature and contains a large amount of energy in its chemical bond. Because of its low density, liquid hydrogen weighs less than petroleum-based fuels. The density of gaseous hydrogen is 0.0899 grams per liter (g/l). (Air is 1.4 times as dense.) Liquid hydrogen boils at -252.77 degrees Celsius, and it has a density of ! 70.99 g/l. With these properties, hydrogen has the highest energy-to-weight ratio of all fuels: 1 kilogram (kg) of hydrogen has the same amount of energy as 2.1 kg of natural gas or 2.8 kg of gasoline. Hydrogen burns in air at concentrations in the range of 4 to 75 percent by volume (methane burns at 5.3 to 15 percent concentrations by volume). The highest burning temperature of hydrogen is 2,318 degrees Celsius and is reached at 29-percent concentration by volume in air.These data give hydrogen both advantages and disadvantages. The major advantage is that hydrogen stores approximately 2.8 times the energy per unit mass as gasoline. The disadvantage is that it needs four times the volume for a given amount of energy. For example, a 15-gallon tank of gasoline contains 90 pounds of gasoline; a 60-gallon tank of gaseous hydrogen would weigh only 34 pounds. Hydrogen has the potential to reduce the amount of fuel consumed by AAN platforms, but the size of the storage container ! would increase....Show more
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