期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 36, 期 13, 页码 7567-7579出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2011.03.079
关键词
H-2 storage; Multisite Langmuir model; Activated carbon fibers; Supercritical water
资金
- Ministerio de Educacion y Ciencia, Spain
- European Regional Development Fund [CTQ2006-00759/PPQ]
- Ministerio de Ciencia e Innovacion [CTQ2009-10188/PPQ]
In the present work we study the capacity of storage hydrogen on carbon fibers activated with supercritical water and with steam on the basis of a multisite Langmuir model, with three energetically different adsorption sites that may be associated with pores of different sizes: i) very small micropores, accessible only to hydrogen; ii) micropores detected by the adsorption of CO2, and iii) micropores detected by the adsorption of N-2. The correlation of the experimental data with the model allowed the amount of hydrogen stored in each of the sites to be quantified and confirmed that hydrogen storage mechanism begins with the filling of the smallest pores. Additionally, from the model it was possible to interpret the dependence of the amount of hydrogen stored with textural parameters such as the micropore volumes. The model also allowed the storage capacity of the fibers to be predicted for pressures higher than those obtained experimentally. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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