Formation of Hydrogen by Ball Milling of Mg and Mg Alloy in Seawater

Abstract:

Mg alloy chips produced by machining processes are fine and active, and thus difficult to recycle by melting. The treatment of Mg chips is one of the concerns for expansion of the application of Mg alloys. Therefore, suitable processing for Mg chips is necessary. Mg alloys have the disadvantage of poor corrosion resistivity, and high reactivity with water, leading to the hydrogen and Mg hydroxide. This hydrolysis reaction is enhanced by the presence of NaCl in water. In this study, hydrogen was produced by the hydrolysis reaction of Mg chips generated by machining and seawater. Furthermore, ball milling was performed to enhance the formation of hydrogen. The hydrolysis reaction combined with the ball milling produced 795mL of hydrogen for 1g of Mg chips after 120 min. However, only 180 mL of hydrogen was obtained by the reaction without ball milling; a notable improvement in hydrogen formation was observed. A similar result was obtained for AZ91 chips. It is believed that the combined process of hydrolysis and ball milling is useful for the production of hydrogen with the disposal of Mg chips.

• Periodical: Materials Science Forum (Volume 879)
• Pages: 1265-1269
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.879.1265
• Online since: November 2016
• Authors: Kunio Matsuzaki, Takashi Murakami
• Keywords: Ball Milling, Hydrogen, Hydrolysis Reaction, Mg Chips, Mg Hydroxide, Recycle

References

[1] J.F. King, A. Hopkins and S. Thistlethwaite, Recycling of by-products from Magnesium diecasting, Proceeding of the Third International Magnesium Conference, ed.G.W. Lormer (London, Institute of Materials, 1996), 51-61.

[2] K. Matsuzaki, Y. Murakoshi, and T. Shimizu, Microstructure and Mechanical Properties of Solid State Recycled Mg alloy Chip, Magnesium Technology 2011, ed . Wim H. Sillekens, Sean R. Agnew, Neale R. Neelameggham, and Suveen N. Mathaudhu, (Sandiago, TMS , 2011)485-490.

DOI: 10.1002/9781118062029.ch91

[3] M. -H. Grosjean, M. Zidoune, L. Roue and J. -Y. Huot, Hydrogen production via hydrolysis reaction from ball-milled Mg-based materials, International Journal of Hydrogen Energy, 31(2006)109-119.

DOI: 10.1016/j.ijhydene.2005.01.001

[4] M. -H. Grosjean and L. Roue, Hydrolysis of Mg-Salt and MgH2-salt mixtures prepared by ball milling for hydrogen, J. Alloy and compounds, 416(2006)296-302.

DOI: 10.1016/j.jallcom.2005.09.008

[5] L.Z. Ouyang, Y.J. Xu,H.W. Dong, L.X. Sun and M. Zhu, Production of hydrogen via hydrolysis of hydrides in Mg-La system, Int.J. Hydrogen Energy 34(2009)9671-9676J.

DOI: 10.1016/j.ijhydene.2009.09.068

[6] O.V. Kravchenko, L.G. Sevastyanova, S.A. Urvanov B.M. Bulychev, Formation of hydrogen from oxidation of Mg, Mg alloy and mixture with Ni, Co, Cu and Fe in aqueous salt solutions, Int. J. Hydrogen Energy 39(2014)5522-5527.

DOI: 10.1016/j.ijhydene.2014.01.181