hydrogen uses and energy. hydrogen: what is it? simplest element 1 proton 1 electron
TRANSCRIPT
HYDROGEN
Uses and Energy
HYDROGEN: What is it?
Simplest element 1 proton 1 electron
HYDROGEN
MOST ABUNDANT GAS IN THE UNIVERSE Highest energy by weight Lowest energy by volume
OUR SUN: 4 Hydrogen fuse into 1 Helium
HYDROGEN: Energy
OUR SUN Light Heat Wind Rain Photosynthesis Fossil fuels
HYDROGEN: On Earth
ABUNDANTBUT, Hydrogen gas, H2, not naturally
found on EarthFound as:
CH4, H2O, biomass, fossil fuels, in Earth’s crust
Considered Renewable
HYDROGEN: Energy On Earth
As an energy source:Highly efficient
•A lot of energy for a small amountLow pollutionFLEXIBLEUSES:
•Transportation, heating, power generation
HYDROGEN: Production
STEAM REFORMING:High-temperature steam
separates hydrogen from methane.
C
H
HH
H 1. Cost effective
2. But uses fossil fuels
HYDROGEN: Production
ELECTROLYSIS: splitting water with electricity
2H2O + electricity 2H2 + O2
HYDROGEN: Production
HYDROGEN: Production
ELECTROLYSIS: VERY PURE
Can use renewable energyWATER is renewable
BUT, VERY EXPENSIVE
HYDROGEN: Production
PHOTOELECTROLYSIS:Uses sunlight to split water2H2O + SUNLIGHT 2H2 + O2
HYDROGEN: Production
BIOMASS GASIFICATIONBIOMASS GASIFICATIONBiomass is super-heated into Biomass is super-heated into
hydrogen and other gaseshydrogen and other gasesBIOMASS CAN BE USED TO BIOMASS CAN BE USED TO
GENERATE THE HEATGENERATE THE HEAT
HYDROGEN: Current Uses
RefiningRefiningTreating metalsTreating metalsFood processingFood processing
HYDROGEN: Current Uses
NASA: FUEL CELLSNASA: FUEL CELLSPropelling space shuttlePropelling space shuttlePowering electrical systems by Powering electrical systems by
reverse electrolysisreverse electrolysis
2H2 + O2 2H2O + electricity
HYDROGEN: Current Uses
HYDROGEN: Current Uses
COSTS of REVERSE ELECTROLYSIS: Very expensive to build fuel cells Very expensive to produce hydrogen Not many ‘Filling Stations’ Technology is not widespread
HYDROGEN: Current Uses
BENEFITS of REVERSE ELECTROLYSIS: Zero emissions Very efficient Very portable and accessible Reduces need of dependence on
foreign oil