METAL HYDROGEN STORAGE SYSTEMS Andrew Craft University of Hartford Department of Chemistry
Energy Sources Fossil Fuels Fossil Fuels –Coal –Petroleum –Natural Gas Alternative Energies Alternative Energies –Solar –Nuclear –Hydrogen –Others - E85, Wind, Hydroelectric, Geothermal
Fossil Fuels Very Dirty Very Dirty –Health –Environmental Limited Supply Limited Supply –2030? –2050? –Tomorrow?
Why Hydrogen? Most energetic non-nuclear fuel. Most energetic non-nuclear fuel. –2.5x as energetic as Natural Gas (methane) per gram. Burns clean Burns clean –2H 2 + O 2 2H 2 O Abundant as water. Abundant as water. –2H 2 O 2H 2 + O 2 Only basic technological changes needed. Only basic technological changes needed.
Why not Hydrogen as Fuel ? Little, if any, net useful energy Little, if any, net useful energy Flammability
Metal-Hydrogen Systems! What is a Metal-Hydrogen System? What is a Metal-Hydrogen System? –a.k.a. Metal-Hydride
As the name implies, a metal hydrogen system results from the absorption of hydrogen by a metal. Once absorbed, the hydrogen is not flammable!!
Why Metal-Hydrides? Pacification of hydrogen = Not flammable! Pacification of hydrogen = Not flammable!
Things to worry about with Hydrogen Storage in Metals High storage capacity High storage capacity Fast charging & discharging Fast charging & discharging Cost (Who Killed The Electric Car?) Cost (Who Killed The Electric Car?) Non-extreme plateau pressures Non-extreme plateau pressures Long service life Long service life –cycling effects/ embrittlement –poisoning Activation Activation