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Hydrogen energy - Coggle Diagram
Hydrogen energy
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Hydrogen gas
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Colours: Green, pink, yellow, blue, turquoise -- Black worst
Benefits of green H = uses wind, solar, hydro etc. Minimal GHG footprint through electrolysis
H energy systems
- Water +
- Primary energy source
- = Energy carrier
- = Transfer to energy consuming sector
- = Leads to water as a by product
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H gas storage
Physical-based = compressed gas, cryo compressed, liquid
Material-based = adsorbent, liquid organic, complex hydride, chemical H
Challenges:
- uses excess electricity to produce H gas from water
Fuel cells
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How it works - combines H and O2 gas to form water - harnesses energy from movement of electricity during process
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Sabatier reaction = makes methane from CO2 and H2.
Uses a nickel catalyst to interact with hydrogen and carbon dioxide at elevated temperatures and pressures to produce water and methane.