Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Effect of Additives for Prevention of NaBO2 Precipitation on Hydrogen Generation Properties of NaBH4 Hydrolysis

NaBO2의 석출 방지를 위한 첨가제가 NaBH4 가수분해의 수소발생특성에 미치는 영향

  • Oh, Taekyun (Division of Aerospace Engineering, School of Mechanical, Aerospace and Systems Engineering, KAIST) ;
  • Kwon, Sejin (Division of Aerospace Engineering, School of Mechanical, Aerospace and Systems Engineering, KAIST)
  • 오택현 (한국과학기술원 기계항공시스템학부 항공우주공학전공) ;
  • 권세진 (한국과학기술원 기계항공시스템학부 항공우주공학전공)
  • Received : 2013.01.28
  • Accepted : 2013.02.28
  • Published : 2013.02.28
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Abstract

Additives such as glycerol, methanol, acetone, and ethanol were used to prevent $NaBO_2$ from precipitation, and their effects on hydrogen generation properties of $NaBH_4$ hydrolysis were investigated. When the concentration of additives was 5 wt%, the additives such as methanol, acetone, and ethanol could not prevent $NaBO_2$ precipitation. Although glycerol prevented $NaBO_2$ precipitation, conversion efficiency decreased to 78.0% due to its viscosity. Based on test results, hydrogen generation tests were also performed at various concentration of glycerol and methanol to investigate the concentration effects on hydrogen generation properties. As the concentration of glycerol increased from 1 wt% to 3 wt%, conversion efficiency increased owing to additive effect. When its concentration increased to 5 wt%, conversion efficiency decreased due to its viscosity. As the concentration of methanol increased from 5 wt% to 10 wt%, conversion efficiency increased owing to additive effect. When its concentration increased to 15 wt%, conversion efficiency decreased due to $NaB(OCH_3)_4$ precipitate. Although conversion efficiency decreased about 1% when 3 wt% glycerol was added, $NaBO_2$ precipitation was prevented. Consequently, addition of 3 wt% glycerol to $NaBH_4$ solution improves stability of hydrogen generation system.

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References

  1. T. H. Bradley, B. A. Moffitt, D. N. Mavris, D. E. Parekh, "Development and experimental characterization of a fuel cell powered aircraft", J Power Sources, Vol. 171, 2007, pp. 793-801. https://doi.org/10.1016/j.jpowsour.2007.06.215
  2. K. Kim, T. Kim, K. Lee, S. Kwon, "Fuel cell system with sodium borohydride as hydrogen source for unmanned aerial vehicles", J Power Sources, Vol. 196, 2011, pp. 9069-9075. https://doi.org/10.1016/j.jpowsour.2011.01.038
  3. T. Kim, S. Kwon, "Design and development of a fuel cell-powered small unmanned aircraft", Int J Hydrogen Energy, Vol. 37, 2012, pp. 615-622. https://doi.org/10.1016/j.ijhydene.2011.09.051
  4. L. James, D. Andrew, "Fuel cell systems explained", John Wiley & Sons, Ltd., England, 2003, pp. 1-24.
  5. R. O'Hyare, S. W. Cha, W. Colella, F. B. Prinz, "Fuel cell fundamentals", John Wiley & Sons, Inc., USA, 2009, pp. 261-286.
  6. S. U. Jeong, R. K. Kim, E. A. Cho, H. J. Kim, S. W. Nam, I. H. Oh, S. A. Hong, S. H. Kim, "A study on hydrogen generation from $NaBH_4$ solution using the high-performance Co-B catalyst", J Power Sources, Vol. 144, 2005, pp. 129-134. https://doi.org/10.1016/j.jpowsour.2004.12.046
  7. K. W. Cho, H. S. Kwon, "Effects of electrodeposited Co and Co-P catalysts on the hydrogen generation properties from hydrolysis of alkaline sodium borohydride solution", Catal Today, Vol. 120, 2007, pp. 298-304. https://doi.org/10.1016/j.cattod.2006.09.004
  8. W. Ye, H. Zhang, D. Xu, L. Ma, B. Yi, "Hydrogen generation utilizing alkaline sodium borohydride solution and supported cobalt catalyst", J Power Sources, Vol. 164, 2007, pp. 544-548. https://doi.org/10.1016/j.jpowsour.2006.09.114
  9. S. J. Kim, J. Lee, K. Y. Kong, C. R. Jung, I. G. Min, S. Y. Lee, H. J. Kim, S. W. Nam, T. H. Lim, "Hydrogen generation system using sodium boro-hydride for operation of a 400 W-scale polymer electrolyte fuel cell stack", J Power Sources, Vol. 170, 2007, pp. 412-418. https://doi.org/10.1016/j.jpowsour.2007.03.083
  10. H. B. Dai, Y. Liang, P. Wang, X. D. Yao, T. Rufford, M. Lu, H. M. Cheng, "High-performance cobalt-tungsten-boron catalyst supported on Ni foam for hydrogen generation from alkaline sodium borohydride solution", Int J Hydrogen Energy, Vol. 33, 2008, pp. 4405-4412. https://doi.org/10.1016/j.ijhydene.2008.05.080
  11. K. Eom, K. Cho, H. Kwon, "Effects of electroless deposition conditions on microstructures of cobalt-phosphorous catalysts and their hydrogen generation properties in alkaline sodium borohydride solution", J Power Sources, Vol. 180, 2008, pp. 484-490. https://doi.org/10.1016/j.jpowsour.2008.01.095
  12. D. R. Kim, K. W. Cho, Y. I. Choi, C. J. Park, "Fabrication of porous Co-Ni-P catalysts by electrodeposition and their catalytic characteristics for the generation of hydrogen from an alkaline $NaBH_4$ solution", Int J Hydrogen Energy, Vol. 34, 2009, pp. 2622-2630. https://doi.org/10.1016/j.ijhydene.2008.12.097
  13. N. Patel, R. Fernandes, A. Miotello, "Hydrogen generation by hydrolysis of $NaBH_4$ with efficient Co-P-B catalyst: a kinetic study", J Power Sources, Vol. 188, 2009, pp. 411-420. https://doi.org/10.1016/j.jpowsour.2008.11.121
  14. K. Eom, H. Kwon, "Effects of deposition time on the $H_2$ generation kinetics of electroless-deposited cobalt-phosphorous catalysts from $NaBH_4$ hydrolysis, and its cyclic durability", Int J Hydrogen Energy, Vol. 35, 2010, pp. 5220-5226. https://doi.org/10.1016/j.ijhydene.2010.03.005
  15. X. Zhang, J. Zhao, F. Cheng, J. Liang, Z. Tao, J. Chen, "Electroless-deposited Co-P catalysts for hydrogen generation from alkaline $NaBH_4$ solution", Int J Hydrogen Energy, Vol. 35, 2010, pp. 8363-8369. https://doi.org/10.1016/j.ijhydene.2009.11.018
  16. T. H. Oh, S. Kwon, "Effect of manufacturing conditions on properties of electroless deposited Co-P/Ni foam catalyst for hydrolysis of sodium borohydride solution". Int J Hydrogen Energy, Vol. 37, 2012, pp. 15925-15937. https://doi.org/10.1016/j.ijhydene.2012.08.053
  17. T. H. Oh, S. Kwon, "Effect of bath composition on properties of electroless deposited Co-P/Ni foam catalyst for hydrolysis of sodium borohydride solution", Int J Hydrogen Energy, Vol. 37, 2012, pp. 17027-17039. https://doi.org/10.1016/j.ijhydene.2012.08.083
  18. B. H. Liu, Z. P. Li, S. Suda, "Solid sodium borohydride as a hydrogen source for fuel cells", J Alloys Compd, Vol. 498, 2009, pp.493-498.
  19. R. K. Kim, S. U. Jung, E. H. Park, S. H. Kim, "A study on additives to control the formation of sodium metaborate: the by-product of $NaBH_4$ hydrolysis for hydrogen generation", Theories and Applications of Chem. Eng., Vol. 10, No. 2, 2004, pp. 1875-1878.
  20. M. Kim, S. C. Kwon, "Review on electroless plating (I)", Journal of the Metal Finising Society of Korea, Vol. 19, No. 3, 1986, pp. 121-127.
  21. M. Kim, S. C. Kwon, "Review on electroless plating (II)", Journal of the Metal Finising Society of Korea, Vol. 19, No. 4, 1986, pp. 155-188.
  22. I. Lucas, L. Perez, C. Aroca, P. Sanchez, E. Lopez, M. C. Sanchez, "Magnetic properties of CoP alloys electrodeposited at room temperature", J Magn Magn Mater, Vol. 290-291, 2005, pp. 1513-1516. https://doi.org/10.1016/j.jmmm.2004.11.563
  23. C. T. F. Lo, K. Karan, B. R. Davis, "Kinetic assessment of catalysts for the methanolysis of sodium borohydride for hydrogen generation", Ind. Eng. Chem. Res., Vol. 48, 2009, pp. 5177- 5184. https://doi.org/10.1021/ie8009186