Table of Contents
ISRN Nanomaterials
Volume 2013, Article ID 539534, 10 pages
http://dx.doi.org/10.1155/2013/539534
Research Article

Hydrogen Storage of a Fixed Bed of Nanocrystalline Mixed Oxides

Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Tronoh, Perak 31750, Malaysia

Received 12 December 2012; Accepted 1 January 2013

Academic Editors: M. Mirzaei and J. Zeng

Copyright © 2013 M. Abdus Salam et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nanocrystalline hydrotalcite derived mixed oxides containing magnesium, cobalt, and aluminum (MCAM) (M(1−x)AlxO(1+x/2); M = Mg or Co/Mg and Co and x = molar ratios) have been synthesized successfully and showed reversible hydrogen storage capacity at near ambient condition using fixed bed. ICP-MS and XRD analysis confirmed the adsorbent phases and their homogeneity. Adsorbent morphology and textural properties have been characterized using FESEM, BET and TEM analysis techniques. Nano-crystalline and porous mixed oxides exhibited 3 wt% H2 storage capacity and desorbed 57% of adsorbed H2. Spillover phenomena are observed through FTIR analysis. Adsorption enthalpy () and entropy () change were −25.58 kJ/mol and −59.98 J/mol·K, respectively, which implied a prospective feature of reversible hydrogen adsorption on nano-crystalline mixed oxide.