Publication Date:
2015-05-27
Description:
Catalyst activity and stability of CO2 reforming of CH4 depend primarily upon the support, active metal and promoter. In the present work, the effect of support type on synthesis gas production using Co-based catalysts supported over TiO2-P25, Al2O3, SiO2 and CeO2 has been investigated. The catalysts were prepared by the incipient wet impregnation method. The experiments were performed in a micro tubular reactor at 700 °C, atmospheric pressure. For better understanding and comparison, the catalysts were characterized by various techniques such as BET, XRD, H2-TPR, CO2-TPD, FESEM, and TGA. The results revealed that all Co supported catalysts produced synthesis gas ratios of one and below and therefore very suitable for methanol and Fischer-Tropsch syntheses. Cobalt catalysts supported over TiO2-P25 and Al2O3 gave better synthesis gas ratios and stability performances. The promotion of Co/TiO2-P25 catalyst with Ce has a substantial influence on its catalytic activity and the amount of carbon deposit. Among all Ce loadings, 0.50 wt.% Ce promoted catalyst diminished markedly the extent of carbon deposition and thus boosted the performance towards better activity and the stability.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
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Process Engineering, Biotechnology, Nutrition Technology
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