Hydrogen storage in activated carbons produced from coals of different ranks: Effect of oxygen content

M. C. Tellez-Juárez, V. Fierro, W. Zhao, N. Fernández-Huerta, M. T. Izquierdo, E. Reguera, A. Celzard

    Research output: Contribution to journalArticle

    30 Scopus citations

    Abstract

    20 activated carbons (ACs) were prepared by activation of four coals of different ranks (bituminous, low-ash bituminous and sub-bituminous coals, and one anthracite) with potassium hydroxide, in order to evaluate their hydrogen storage capacities at -196 C. The effect of surface area and oxygen content on hydrogen storage was examined. Oxygen content was determined by temperature-programmed desorption. The significance of oxygen content on hydrogen storage capacity was evaluated by Analysis of Variance (ANOVA). Apparent surface areas higher than 3000 m2 g-1 and hydrogen adsorption as high as 6.8 wt.% were obtained. The best results were obtained with ACs from bituminous coals. No significant effect of oxygen content on hydrogen adsorption was observed. We concluded that surface area controls hydrogen storage capacity at -196 C. © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. 43.
    Original languageAmerican English
    Pages (from-to)4996-5002
    Number of pages4495
    JournalInternational Journal of Hydrogen Energy
    DOIs
    StatePublished - 26 Mar 2014

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