Show MoreHydrogen: the Fuel of the Future?
For years, United States citizens have been using natural gases and oils to power their cars. While doing so we have also been polluting our environment, making ourselves dependant on other regions of the world, and depleting our oil reserves. Rory Sporrows of “Geographical” wrote, “The car is responsible for combusting eight million barrels of oil every day, contributing to nearly a quarter of total global greenhouse emissions and causing major increases in bronchial diseases like asthma and emphysema.” (2001) Oil is not a renewable resource. One day it will run out. The graph to the left depicts that in these times in which we should be conserving what we have; we are doing exactly…show more content…
They have potential to produce hydrogen without using any electricity. Scientists for the past sixty years have known that a certain kind of algae, Chlamydomonas reinhardtii, produces trace amounts of hydrogen gas. Tasios Malis, a professor at the University of California, and his colleagues have figured out that by starving the algae of sulphur the hydrogen production increases by almost four hundred percent. The algae plant can sustain a four-day period of this starved state, but then must be revitalized. The algae can be cycled between a recuperated and sulphur-starved state several times. Malis also estimated that, once optimized, a square meter pond of the algae could produce up to twenty-five grams of hydrogen per day, enough to power a mid size, fuel cell car about three kilometers or just less than two miles (Baulch, 2001). It’s interesting but, for the most part, unlikely for application.
When the pure hydrogen, shown on the left side of the diagram to the left, is administered into the hydrogen fuel cell it is passed over an electrically charged platinum catalyst with an anode on one side and a cathode on the other side. The electrons, which are unable to pass through the electrolyte (Proton exchange membrane), collect at the cathode and are then transferred to a capacitor to be stored for use (Motavalli, 2000). The positively charged hydrogen atoms pass through the electrolyte
Hydrogen as an Alternative Fuel Essays
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Hydrogen as an Alternative Fuel
What is Hydrogen?
The simplest and lightest fuel is hydrogen gas (H2). Hydrogen is in a gaseous state at atmospheric pressure and ambient temperatures. Hydrogen is being explored for use in combustion engines and fuel cell electric vehicles. On a volumetric basis, the energy density of hydrogen is very low under ambient conditions. This presents greater transportation and storage hurdles than for liquid fuels. Storage systems being developed include compressed hydrogen, liquid hydrogen, and physical or chemical bonding between hydrogen and a storage material (for example, metal hydrides).The ability to create hydrogen from a variety of resources and its…show more content…
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.
Reduce Greenhouse Gas Emissions
Greenhouse gases are thought to be responsible for changes in global climate. They trap excess heat from the sun's infrared radiation that would otherwise escape into space, much like a greenhouse is used to trap heat. When we drive our cars, and light, heat, and cool our homes, we generate greenhouse gases. But if we used hydrogen in very high efficiency fuel cells for our transportation and to generate power, we could significantly reduce the GHG emissions - especially if the hydrogen is produced using renewable resources, nuclear power, or clean fossil technologies.
Reduce Air Pollution
The combustion of fossil fuels by electric power plants, vehicles, and other sources is responsible for most of the smog and harmful particulates in the air. Fuel cells powered by pure hydrogen emit no harmful pollutants. Fuel cells that use a reformer to convert fuels such as natural gas, methanol, or gasoline to hydrogen do emit small amounts of air