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Transcript 
Christopher Carver
Dr Klaus Hellgardt
SMR
3 tC/tH2
Electrolysis
8 tC/tH2
Other
Benefits
Challenges
Fossil fuel
reliance
Infrastructure
Green house
gases
Storage
Abundant
resources
Perception
Durable & low
maintenance
Energy
security
210mm
240mm
70mm
Theoretical water decomposition energy
0.6 eV
0.1 eV
1.23 eV
Recombination
Overpotential
Theoretical
Eg = 2.3 eV
0.4 eV
 Design flexible test-bed reactor
 Hydrogen production experiments
-
10 x 10cm photoanode
-
Semiconductor material
-
Photon absorption
-
Electrode configuration
-
Quantum efficiency
-
High mass transfer rate coefficients
-
Separate hydrogen and oxygen
titanium
Good absorption
Stable in alkali
Recombination
Stable in acid/alkali
UV absorption only
Good efficiency
Stable in acid
PVDF
quartz
Current density (A/m2)
Butler-Volmer equation
Kinetic
control
Increasing mass
transport rate
Transport control
Overpotential (V)
quartz window
PHOTOANODE
membrane
cathode
PHOTOANODE
electrolyte
Set Up Reactor
Experiments
Analyse Results
Electrical connections
Semiconductors /
electrolyte
Quantify H2 production
Hydrogen extraction
system
Electrode configuration
Optimise reactor design
Evaluate reactor design
Multiple electrodes
Temperature
Deliver report
QUESTIONS?
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