Effects of organic acid catalysts on the hydrogen generation from NaBH4

Go Young Moon; Sang Seo Lee; Ga Ram Yang; Kwang Ho Song

Korean Journal of Chemical Engineering, Vol.27, No.2, 474-479, February, 2010

DOI10.1007/s11814-010-0072-3 Export Citation

Effects of organic acid catalysts on the hydrogen generation from NaBH4

Go Young Moon, Sang Seo Lee¹, Ga Ram Yang¹, and Kwang Ho Song^{1, †}

LS Industrial Systems Co., Ltd., Anyang, Gyeonggi-do 431-080, Korea
¹Department of Chemical and Biological Engineering, Korea University, Seoul 136-713, Korea

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Sodium borohydride has received much attention from fuel cell developers due to its high hydrogen storage capacity. In this study, organic acid solutions such as malic, citric, acetic acids were successfully utilized to accelerate and control hydrogen generation from stabilized sodium borohydride solutions. The generated hydrogen by malic acid was then continuously supplied to a PEMFC single cell. A power density of 168 mW cm^(-2) was achieved with a hydrogen flow rate of 0.050 L min^(-1) that was generated by adding 10 wt% aqueous malic acid to the stabilized sodium borohydride solution at an air flow rate of 0.11 L min^(-1) without humidification. Further increase of power density to 366mW cm^(-2) is practicable by maintaining a precise hydrogen flow rate of 0.3 L min^(-1). The current study focuses on the development of an instant hydrogen generation method for micro fuel cell applications. We successfully demonstrated that fast and direct generation of hydrogen could be achieved from stabilized borohydride using inexpensive organic acid solutions rather than expensive metal catalysts and a PEMFC single cell could be operated by generated hydrogen.

Keywords:Sodium Borohydride;Malic Acid;Fuel Cell;Hydrogen;PEMFC;Hydrolysis

[References]

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[1] http://www.nttdocomo.com/pr/2006/001279.html

[2] http://www.maxell.co.jp/e/release/20060421.html

[3] Moon GY, Lee SS, Lee KY, Kim SH, Song KH, J. Ind. Eng. Chem., 13, 94 (2007)

[4] Amendola SC, Sharp-Goldman SL, Janjua MS, Spencer NC, Kelly MT, Petillo PJ, Binder M, Int. J. Hydrogen Energy, 25, 969 (2000)

[5] Ozkar S, Zahmarkiran M, J. Alloys and Compounds, 404-406, 728 (2005)

[6] Wu C, Zhang HM, Yi BL, Catal. Today, 93-95, 477 (2004)

[7] Kojima Y, Suzuki K, Fukumoto K, Sasaki M, Yamamoto T, Kawai Y, Hayashi H, Int. J. Hydrogen Energy, 27, 1029 (2002)

[8] Pinto AMFR, Falcao DS, Silva RA, Rangel CM, Int. J. Hydrogen Energy, 31, 1341 (2006)

[9] Liu BH, Li ZP, Suda SS, J. Alloys and Compounds, 415, 288 (2006)

[10] Liu BH, Li Q, Int. J. Hydrogen Energy, 33, 7385 (2008)

[11] Cho KW, Kwon HS, Catal. Today, 120(3-4), 298 (2007)

[12] Zhang J, Fisher TS, Gore JP, Hazra D, Veeraraghavan Ramachandran P, Int. J. Hydrogen Energy, 31, 2292 (2006)

[13] Schlesinger HI, Brown HC, Finholt AE, Gilbreath JR, Hoekstra HR, Hyde EK, J. Am. Chem. Soc., 75, 215 (1953)

[14] Sarata T, Proceedings of portable power 2005, The Palace Hotel, San Francisco, Sept. 18-21 (2005)

[15] Xia ZT, Chan SH, J. Power Sources, 152(1), 46 (2005)

[16] Richardson BS, Birdwell JF, Pin FG, Jansen JF, Lind RF, J. Power Sources, 145(1), 21 (2005)