Magnesium loaded carbon for hydrogen adsorption

Rufford, Thomas, Takagi, Hideyuki, Zhu, Zhonghua, Hatori, Hiraoki and Lu, Gaoqing (2007). Magnesium loaded carbon for hydrogen adsorption. In: Nanostructures for Electronics Energy and Environment (NanoE3), Couran Cove, Qld, Australia, (). 23-28 September, 2007.

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Author Rufford, Thomas
Takagi, Hideyuki
Zhu, Zhonghua
Hatori, Hiraoki
Lu, Gaoqing
Title of paper Magnesium loaded carbon for hydrogen adsorption
Conference name Nanostructures for Electronics Energy and Environment (NanoE3)
Conference location Couran Cove, Qld, Australia
Conference dates 23-28 September, 2007
Publication Year 2007
Year available 2007
Language eng
Abstract/Summary The development of effective hydrogen storage technologies remains a key technical challenge to the widespread use of hydrogen fuel cell vehicles and devices. Both metal hydrides and carbon materials have been studied as promising hydrogen storage materials. However, higher capacity metal hydrides, such as magnesium hydride, are limited by their slow kinetics and require operating temperatures above 300ºC. While carbon materials show fast adsorption and desorption kinetics, at room temperature or higher carbon materials alone cannot achieve significant hydrogen capacity. Recently, the addition of carbon nanostructures to magnesium, via ball milling, has been reported to improve kinetics and dehydrogenation temperatures. In this study we investigated the preparation and hydrogen adsorption properties of magnesium loaded on an activated carbon fibre (ACF). The decomposition magnesium chloride, MgCl2, impregnated on ACF was observed by thermogravimetric analysis (TGA) under nitrogen and hydrogen atmospheres to identify process conditions for synthesis of Mg loaded ACF. The rate of hydrogen adsorption on ACF loaded with 11.2 %wt Mg was measured using a volumetric method at a temperature of 300ºC and hydrogen pressure of 2.2 MPa. The adsorption was compared to that on a bulk Mg powder at the same conditions. While hydrogen uptake on both samples was slow, the Mg loaded ACF sample did adsorb hydrogen suggesting the successful synthesis of Mg particles, and not MgO, on the ACF surface. Hydrogen uptake on a magnesium weight basis was 4.0 %wt H2/Mg for the Mg loaded ACF compared to 1.9 %wt for the bulk Mg powder.
Subjects 850606 Hydrogen Storage
100708 Nanomaterials
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Conference Paper
Collection: School of Chemical Engineering Publications
 
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Created: Mon, 16 Nov 2009, 12:01:18 EST by Dr Thomas Rufford on behalf of School of Chemical Engineering