Abstract
Carbon nanotube supported nano-size monometallic and noble metal (Pt and Ru) promoted cobalt catalysts were prepared by incipient wetness impregnation (IWI) using solution of cobalt nitrate and characterized by nitrogen adsorption isotherm, X-ray diffraction (XRD), temperature programmed reduction, in situ magnetic method and TEM. Analysis of the magnetization and H2-TPR data suggested promotion with platinum and ruthenium significantly decreased the cobalt species reduction temperature. TEM and XRD results showed that the presence of noble metal promoters had no significant effect on the size of cobalt for carbon naotube as catalytic support. Promotion of cobalt carbon nanotube-supported catalysts with small amounts of Pt and Ru resulted in slight increase in Fischer–Tropsch cobalt time yield. The Pt and Ru promoted cobalt catalyst exhibited carbon monoxide conversion of 37.1 and 31.4, respectively. C5+ hydrocarbon selectivity was attained at 80.0%. The Pt promoted cobalt supported on carbon nanotube yielded better catalytic stability than that of the monometallic cobalt catalyst.
Graphical Abstract
Over carbon nanotube supported cobalt catalyst, the addition of noble promoter significantly decreased the cobalt reduction temperature, but had no significant influence on the cobalt particle size.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (#205903603) and by Scientific Research Fund of SiChuan Provincial Education Department and Development Program of China (863 program) (2007 AA11A117). Dr. Petr A. Chernavskii of Moscow State University was acknowledged for situ magnetic measurements. Thanks Dr. Andrei Y. Khodakov for helpful discussion.
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Zhang, H., Chu, W., Zou, C. et al. Promotion Effects of Platinum and Ruthenium on Carbon Nanotube Supported Cobalt Catalysts for Fischer–Tropsch Synthesis. Catal Lett 141, 438–444 (2011). https://doi.org/10.1007/s10562-010-0536-4
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DOI: https://doi.org/10.1007/s10562-010-0536-4