hydrogen production from water using solar cells powered nafion ...

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We approve the thesis of Ziya Can Aksakal Date of Signature ………………………… 19 July 2007 Assist. Prof. Dr. Erol Şeker Supervisor Department of Chemical Engineering Đzmir Institute of Technology ………………………… 19 July 2007 Assoc. Prof. Dr. Gülden Gökçen Co- supervisor Department of Mechanical Engineering Đzmir Institute of Technology ………………………… 19 July 2007 Assist. Prof. Dr. Fikret Đnal Department of Chemical Engineering Đzmir Institute of Technology ………………………… 19 July 2007 Prof. Dr. Tamerkan Özgen Department of Chemistry Đzmir Institute of Technology ………………………… 19 July 2007 Assist. Prof. Dr. Yusuf Selamet Department of Physics Đzmir Institute of Technology ………………………… 19 July 2007 Assoc. Prof. Dr. Gülden Gökçen Head of Department Đzmir Institute of Technology …………………………… Prof Dr. M. Barış ÖZERDEM Head of the Graduate School ii
ACKNOWLEDGEMENTS This study was carried out at the program of Energy Engineering and at the department of Chemical Engineering, Izmir Institute of Technology during the years 2004- 2007. The study was funded through the Department of Prime Ministry State Planning Organization I express my warmest gratitude to my supervisors Dr. Gülden Gökçen and Dr. Erol Şeker for introducing me to the promising world of hydrogen and its related applications. Their endless supports and contributions throughout the course of this thesis encourage me to pull of this work. I would like to thank Dr. Fikret Đnal, Dr. Sacide Alsoy Altınkaya, Dr. Zafer Đlken for their valuable teachings during my undergraduate and graduate. I wish to thank Güler Narin for her patience and guidance on testing my hydrogen samples and wish to thank Mahir Tosun for his hard data gathering work in Iztech Weather Station and for his sharing. I am grateful to the whole stuff of Department of Mechanical and Department of Chemical Engineering for their help and technical assistance. I express my thanks to all my friends and colleagues; Serdar Özer, Özge Malay, Güler Aslan, Dane Ruscuklu, Erkin Gezgin for their friendship and for taking my mind out of the work from time to time. Finally my special thanks go to my family Kerem Aksakal, Gülser Aksakal, Burhan Aksakal, Ziya Yavuz and Pervin Yavuz for their support. iii
Page 1: HYDROGEN PRODUCTION FROM WATER USIN
Page 5 and 6: ÖZET GÜNEŞ PĐLLERĐ ĐLE ÇALI
Page 7 and 8: 4.2. Results on a Single Cell PEM E
Page 9 and 10: Figure 4.16. Hydrogen Production an
Page 11 and 12: CHAPTER 1 INTRODUCTION World energy
Page 13 and 14: Table 1.1. Turkey`s energy usage as
Page 15 and 16: atmosphere according to their hydro
Page 17 and 18: The reaction goes through two half
Page 19 and 20: 2.1. Hydrogen Production Methods CH
Page 21 and 22: 2.2. Electrolyzers Figure 2.1. Vari
Page 23 and 24: electrode design are being sought t
Page 25 and 26: 1 285,830J/mol + H 2O(l) → H 2(g)
Page 27 and 28: another optimization should be done
Page 29 and 30: Figure 2.3. Molecular Formula of Na
Page 31 and 32: hydrophobic substances in electrode
Page 33 and 34: Different than Grigoriev’s work,
Page 35 and 36: voltages. This concept is also vali
Page 37 and 38: Interdigitated flow field is a diff
Page 39 and 40: generator is always working at its
Page 41 and 42: ecord the voltage and the current s
Page 43 and 44: Figure 3.2. Anode side of the elect
Page 45 and 46: 6. Cover the cathode GDL with 1mm t
Page 47 and 48: to deliver water. The front side of
Page 49 and 50: 5. Place the cathode side GDL into
Page 51 and 52: electrolyzer to monitor the potenti
Page 53 and 54:
Figure 4.1. “X” type flow field
Page 55 and 56:
MEA, there were no electrolysis on
Page 57 and 58:
In fact, it was observed on the dis
Page 59 and 60:
In each run, current density was in
Page 61 and 62:
Voltage 2,25 2,20 2,15 2,10 2,05 2,
Page 63 and 64:
Therefore, for the current cell des
Page 65 and 66:
8Amp, respectively. The calculated
Page 67 and 68:
At 500mAmp/cm 2 , the potential dif
Page 69 and 70:
The installed system had 6 of this
Page 71 and 72:
At 11.00 AM, as the current density
Page 73 and 74:
Figure 4.19 shows solar radiance da
Page 75 and 76:
On Iztech campus, the system constr
Page 77 and 78:
voltage temperature trend observed
Page 79 and 80:
REFERENCES Grigoriev S.A.,Porembsky
Page 81 and 82:
British Petrol World Statistical Re
Page 83 and 84:
Hydrogen Production (ml/min) Hydrog
Page 85 and 86:
Hydrogen Production (ml/min) Hydrog
Page 87 and 88:
APPENDIX B MASS BALANCE OF A FIVE C
Page 89 and 90:
Table B.3. Mass Balance of Species
Page 91 and 92:
Stream3; Species stream 3 at 314.6K
Page 93 and 94:
Figure B.3. Input and output stream
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