Utilization of Landfill Gas towards High-BTU Methane and Low-Cost Hydrogen Fuel
HYDROGEN GAS Hydrogen gas is NOT a fuel but an alternative energy carrier, much like electricity....
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Transcript of HYDROGEN GAS Hydrogen gas is NOT a fuel but an alternative energy carrier, much like electricity....
HYDROGEN GAS
• Hydrogen gas is NOT a fuel but an alternative energy carrier, much like electricity.
• Can be used to heat buildings, power factories, fuel automobiles and planes.
Electrolysis of Water
• Electrolysis – Uses electricity to split
water molecules into hydrogen and oxygen.
– Dept. of Energy (DOE)- concluded that this is not the method to use for large quantities of hydrogen production.
Fuel Cells
• Used in some cars and buses
• Can store hydrogen and use it to produce electricity to power the automobile
Advantages
• Renewable• Emits no toxins – hydrogen burns cleanly with
only water vapor as a product• Leaves no environmental scars• Could stimulate US jobs and economic growth• Reduce dependence on foreign oil
Disadvantages
• Not currently developed enough to rely on as a steady source of energy – technology, transportation of gas
• Low net energy yield• Has to be generated; would take large
amounts of energy to do so• Storing hydrogen is difficult in a vehicle
Internal combustion engines are only 6% efficient…..94% is wasted
Energy Efficiency of Cars with Internal Combustion Engines
Style
• Smaller; more aerodynamic
• Use lightweight body construction– Fiberglass– Carbon fiber– Aluminum
• Nissan Leaf
Features• Use gasoline for
acceleration and hill-climbing
• Use an electrical engine, allows gasoline engine to shut off when coasting or stopped
• Heat energy generated during braking is recovered and converted into electrical energy
• Nissan Leaf electronic control unit