Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 20, Issue 5, Pages 2858-2863Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2013.11.018
Keywords
Nickel; Alkaline earth promoter; Syngas; Dry reforming of methane; Coke formation
Funding
- University of Kashan [158426/16]
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Ni/Al2O3 promoted catalysts with alkaline earth metal oxides (MgO, CaO, and BaO) were prepared and employed in dry reforming of methane (DRM). The catalysts were prepared by impregnation method and characterized by XRD, BET, TPR, TPO, and SEM techniques. The obtained results showed that the addition of MgO, CaO, and BaO as promoter decreased the surface area of catalysts (S-BET). The catalysis results exhibited that adding alkaline earth promoters (MgO, CaO, and BaO) enhanced the catalytic activity and the highest activity was observed for the MgO promoted catalyst. TPR analysis showed that addition of MgO increased the reducibility of nickel catalyst and decreased the reduction temperature of NiO species. The TPO analysis revealed that addition of promoters decreased the amount of deposited coke; and among the studied promoters, MgO has the most promotional effect for suppressing the carbon formation. SEM analysis confirmed the formation of whisker type carbon over the spent catalysts. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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