Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on Effect of the Shape of Electrodes in Alkaline Water Electrolysis

알카리 수전해에서 전극 형상의 영향에 관한 연구

  • CHOI, SOOKWANG (Department of Mechanical Engineering, Graduate School Kumoh National Institute of Technology) ;
  • KIM, JONGSOO (Busan Technical Center of Automotive Parts, Korea Institute of Mechinery & Materials) ;
  • HAN, JIN MOOK (Department of Mechanical Engineering, Graduate School Kumoh National Institute of Technology) ;
  • YUN, SEONG-HO (Department of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • KIM, SEWOONG (Department of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • JUNG, YOUNGUAN (Department of Mechanical Engineering, Kumoh National Institute of Technology)
  • Received : 2017.03.31
  • Accepted : 2017.04.30
  • Published : 2017.04.30
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Abstract

For an investigation on the effect of the shape of electrodes in alkaline water electrolysis, two kinds of stack with circular and square electrode array are used to visualize both for behaviors of hydrogen bubble around the electrodes and for measurements of hydrogen production from these two stacks. The electrolytes for the hydrogen production experiment were applied for 20 wt%, 25 wt%, 30 wt% and 35 wt% of KOH alkaline aqueous solutions. As a result, the adhesion length of bubbles attached around the square electrode in the visualization experiment was found to be 1.7 times longer compared with the attached around the circular electrode. In the hydrogen production experiments, the volume of hydrogen production of the stack by using circular electrode array was approximately 3% more than that of the stack with square electrode array. These observations may be caused by the effect of the bubbles attached to the around the electrodes obstructing mass transfer such as hydrogen exhaust and electrolyte supply.

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References

  1. P. R. Wilson and R. C. Bowman Jr, "Operation of a PEM fuel cell with LaNi4.8Sn0.2 hydride beds", J. Alloys and Compounds, Vol. 446, 2007, pp. 676-680.
  2. Y. Jung, S. Kim, K. Kim, S. Choi, T. Jang, and C. Hwang, "A study on the hydrogen supply for variation in output from a metal hydride canister", Trans. of the Korean Hydrogen and New Energy Society, Vol. 20, No. 3, 2009, pp. 218-223.
  3. D. Park and Y. G. Jung, "Study on the reaction conditions for H2 generation reactor with NaBH4 and Load following ability for Fuel Cell application", 2013 3rd Internatinal Conference on Mechanical Industrial and Manufacturing Technologe, 2013, pp. 676-680.
  4. H. H. Jo, B. J. Jang, and J. Y. Songt, "A study on the channel design of bipolar plate of electrolytic cell by flow dynamic simulation in the two phase flow system", J. of the Korean Oil Chermists' Soc., Vol. 27, No 4, 2010, pp. 415-420.
  5. H. H. Jo, S. H. Lee, B. J. Jang, and J. Y. Songt, "A study on the bipolar plate of electrolytic cell of hydrogen gas generation system by numerical system", J. of the Korean Oil Chermists' Soc., Vol. 27, No. 1, 2010, pp. 61-69.
  6. D. Park, K. Cha, H. Jo, and Y. Jung, "Study on Optimization of Operation in household Fuel Cell System", Trans. of the Korean Hydrogen and New Energy Society, Vol. 23, No. 1, 2012, pp. 598-603. https://doi.org/10.7316/KHNES.2012.23.6.598
  7. D. Park, H. Lee, Y. Jung, B. Kim, and H. Choi, "The study on the combination of PEMFC stacks", International Conference of Future Environment and Energy 2011, pp. 110-113.
  8. C. M. Hwang, D. Park, and Y. Jung, "Effect of double porous layer on a polymer electrolyte Unitized Regenerative Fuel Cell", Trans. of the Korean Hydrogen and New Energy Society, Vol. 24, No. 4, 2013, pp. 320-325. https://doi.org/10.7316/KHNES.2013.24.4.320
  9. A. Kato, M. Masuda, A. Takahashi, T. Ioroi, M. Yamaki, and H. Ito, "Durability investigation of a PEM-type unitized reversible cell", ECS Transactions, Vol. 25, 2009, pp. 1271-1278.
  10. C. M. Hwang, M. Ishida, H. Ito, T. Maeda, A. Nakano, A. Kato, and T. Yoshida "Effect of titanium powder loading in gas diffusion layer of a polymer electrolyte unitized reversible fuel cell", J. of Power Sources, Vol. 202, 2012, pp. 108-113. https://doi.org/10.1016/j.jpowsour.2011.11.041
  11. Y. Jung et al, "Hydrogen Energy", A-JIN Press, 2005, pp. 13.
  12. D. H. Park, H. J. Lee, H. J. Ko, K. H. Kim, S. W. Kim, and Y. G. Jung, "A Study on the hydrogen flow at a separator", Korean Hydrogen and New Energy Society, 2011, pp. 374-375.
  13. D. H. Park, H. J. Lee, K. H. Kim, and Y. G. Juan, "A study on the Bubble stream in the Separators", Korean Hydrogen and New Energy Society, 2012, pp. 246-247.
  14. D. H. Park, J. M. Han, S. W. Kim, and Y. G. Jung, "Numerical Analysis on Bubble growth in the separator", Korean Hydrogen and New Energy Society, 2012, pp. 244-245.
  15. Y. Jung, J. Han, and C. Hwang, "The bubble size Effect on the Numerical Analysis of the flow in the Separator of water electrolysis", Korean Hydrogen and New Energy Society, 2013, pp. 208-210.
  16. Y. Jung, J. Han, and C. Hwang, "The Comparison between Numerical Analysis and Experiment on the Flow in Electrolysis separator with Array type flow channels", Korean Hydrogen and New Energy Society, 2013, pp. 238-240.
  17. Y. Jung and J. Han, "Study on the Hydrogen Production according the Flow patterns in Electrolysis", Korean Hydrogen and New Energy Society, 2015, pp. 181-184.
  18. C. Ryu, J. Kim, D. Park, and Y. Jung, "A Study on the hydrogen flow at a separator ", Trans. of the Korean Hydrogen and New Energy Society, Vol. 23, No. 5, 2012, pp. 538-544. https://doi.org/10.7316/KHNES.2012.23.5.538
  19. Y. Jung, "Study on the Behaivor of Bubbles in Array Type Flow Channels", Trans. of the Korean Hydrogen and New Energy Society, Vol. 24, No. 1, 2013, pp. 84-90. https://doi.org/10.7316/KHNES.2013.24.1.084