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https://doi.org/10.1016/j.cej.2010.12.042
Title: | Manganese promoting effects on the Co-Ce-Zr-Ox nano catalysts for methane dry reforming with carbon dioxide to hydrogen and carbon monoxide | Authors: | Wang, N. Chu, W. Zhang, T. Zhao, X.-S. |
Keywords: | CeO2-ZrO2 High catalytic performance Methane dry reforming with CO2 Mn doping Nano cobalt-composite catalyst Oxygen mobility |
Issue Date: | 1-Jun-2011 | Citation: | Wang, N., Chu, W., Zhang, T., Zhao, X.-S. (2011-06-01). Manganese promoting effects on the Co-Ce-Zr-Ox nano catalysts for methane dry reforming with carbon dioxide to hydrogen and carbon monoxide. Chemical Engineering Journal 170 (2-3) : 457-463. ScholarBank@NUS Repository. https://doi.org/10.1016/j.cej.2010.12.042 | Abstract: | The Mn doping nanocrystalline Co-Ce-Zr-Ox catalysts were prepared by the co-precipitation method and characterized by various physico-chemical characterization techniques such as X-ray diffraction (XRD), temperature- programmed reduction (TPR), O2 temperature-programmed desorption (O2-TPD), X-ray photoelectron spectroscopy (XPS) and temperature-programmed hydrogenation (TPH). Their catalytic performances for methane reforming with CO2 to hydrogen and carbon monoxide were investigated. Adding Mn remarkably enhanced the catalytic activity and stability of the Co-Ce-Zr-Ox catalyst. The highest catalytic activity and long-term stability was obtained when the molar ratio of Mn/(Ce+Zr+Mn) was 10%. The improved catalytic behavior was closely related to the surface oxygen species and oxygen mobility. In comparison with that of Co-Ce-Zr-Ox catalyst, the migration of bulk lattice oxygen species became easier, and the content of surface oxygen species was higher for the Mn-doped nanocrystalline Co-Ce-Zr-Ox samples. TPH characterization showed that the surface coke species could be easily oxidized into COx for the Mn-doped nano cobalt-composite catalyst due to the higher amount of mobile oxygen. The Mn incorporation promoted the dispersion of the nano-sized CoOx crystallites. In comparison with the impregnated samples, CoOx species dispersed better in the co-precipitated catalysts. © 2011. | Source Title: | Chemical Engineering Journal | URI: | http://scholarbank.nus.edu.sg/handle/10635/89356 | ISSN: | 13858947 | DOI: | 10.1016/j.cej.2010.12.042 |
Appears in Collections: | Staff Publications |
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