Hydrogen storage in filed magnesium

Autor(es)

Asselli, A. A. C. ; Santos, S. F. ; Huot, J.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Alloys and Compounds; v. 687, p. 586-594, DEC 5 2016.
• Citações Web of Science: 9

Resumo

In this paper we report an investigation on the processing of magnesium samples by filing and the hydrogen storage properties of the obtained chips. Filing of Mg was performed manually and mechanized. The effect of the filing tool design on the morphology and hydrogen storage properties of Mg chips was evaluated. The hydrogen absorption and desorption kinetics of manual filed Mg is strongly influenced by the geometry of the filing tool. Chips obtained by using a fine tool have larger surface areas and faster hydrogenation and dehydrogenation kinetics. Moreover, these chips show high resistance to air contamination and can absorb and release hydrogen even after long periods of exposition to air. Chips obtained by mechanized filing also showed suitable hydrogen storage properties and a slight increase in incubation period for hydrogen absorption. After this initial delay, the reaction kinetics of hydrogen absorption was similar for both mechanized and manually filed chips. The hydrogen storage properties of the chips are not affected by the machining speed adopted during mechanized filing. These results clearly indicate the feasibility of adopting filing processing to produce Mg for hydrogen storage and open possibilities to scale-up the production of such material using a simple and economical approach. (C) 2016 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 14/06127-5 - Liga de Ti-Cr-Nb para armazenamento de hidrogênio: impactos da microestrutura e processamento nas propriedades de absorção de hidrogênio
• Beneficiário: Sydney Ferreira Santos
• Modalidade de apoio: Bolsas no Exterior - Pesquisa