SLIDE 1
Nanostructured Materials for Light Conversion and Energy Storage - - PowerPoint PPT Presentation
Nanostructured Materials for Light Conversion and Energy Storage - - PowerPoint PPT Presentation
7 th Korea-US Nanoforum Nanostructured Materials for Light Conversion and Energy Storage Conversion and Energy Storage Hyunwoong Park School of Physics and Energy Science Kyungpook National University Kyungpook National University
SLIDE 2
SLIDE 3
Major Hydrogen Production Processes
4 2 2
3 CH H O CO H CO H O CO H + → + + → +
95% in the U.S. 48% in the world
2 2 2
CO H O CO H + → +
48% in the world Huge Carbon Footprint CO /H (w t) = 2 5 CO2/H 2 (w t) = 2.5 Incomplete Reaction CO ti → CO generation
Source: www.hydrogenassociation.org/general/factSheets.asp
SLIDE 4
Key Findings from the Commercial Electrolysis Electrolysis
54-67 kWh/kg-H2 39 kWh/kg-H2
Electricity cost is a major component of H2 cost
Source: Summary of Electrolytic Hydrogen Production, NREL 2004
SLIDE 5
Solar Light-Driven Electrolysis w ith Water Treatment Treatment
PV Hydrogen Storage Fuel Cell
M
H2O H2 O2 or Air Cathode Anode P CO2 H2 Wastewater Treated water
SLIDE 6
PV-Electrochemical Hybrid
(C)
20
m-2)
1150 10:10 11:00 11:50 12:40 13:30 14:20 15:10
Temp
10 15
ΙS (W m
1050 1100 4.4 1.0
ECell (V)
4 0 4.2
ICell (A)
0 6 0.8
n)
0 3 0.4
n)
30 0 9 1.2 4.0 0.6
Phenol mmol/min
0.2 0.3
(μmol/min
20
Ct/C0
0.6 0.9
[H2 ] (m
0.1
[CO2 ] (
10
C
0.3
Time (min)
50 100 150 200 250 300 0.0 0.0
April 18, 2007, Sunny
SLIDE 7
Acknowledgements
K-CAP National Research Foundation National Research Foundation
- Dr. Soonhyun Kim at DGIST