期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 36, 期 14, 页码 8344-8350出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2011.03.167
关键词
Hydrogen storage material; Rate equation; Kinetics; Magnesium hydride; Titanium hydride, dehydrogenation; Non-isothermal experiments
资金
- U.S. Department of Energy (DOE) [DE-FC36-05GO15069]
- Department of Metallurgical Engineering, University of Utah
Among the proposed hydrogen storage systems, magnesium alloys have proved to be promising since they are rechargeable with high hydrogen capacities (theoretically up to 7.6 wt.%), reversibility and low costs. Small particle size, which can be achieved by milling, and small amounts of transition-metal compounds as catalysts result in increased hydrogen release/uptake kinetics. In this work, we developed the rate expression for the dehydrogenation of milled 7MgH(2)/TiH2, 10MgH(2)/TiH2, and MgH2 samples. The complete rate expressions, together with the values of activation energy and other rate parameters, were determined for the three milled samples by analyzing data obtained from non-isothermal thermogravimetric analysis (TGA). The MgH2 doped with TiH2 by high-energy milling displayed substantially reduced apparent activation energy of 107-118 kJ/mol and significantly faster kinetics, compared with 226 kJ/mol for similarly milled MgH2 without TiH2 doping. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据