Wei Chu, J. P Hong, A.Khodakovb, E. Payen, X. Y. Dai. E?ect of Thermal Treatment on Structure and Catalytic Activity of Supported Fischer-Tropsch Nano-Cobalt Catalysts for Clean Fuels[J]. Chinese Journal of Chemical Physics , 2007, 20(6): 743-747. doi: 10.1088/1674-0068/20/06/743-747
Citation: Wei Chu, J. P Hong, A.Khodakovb, E. Payen, X. Y. Dai. E?ect of Thermal Treatment on Structure and Catalytic Activity of Supported Fischer-Tropsch Nano-Cobalt Catalysts for Clean Fuels[J]. Chinese Journal of Chemical Physics , 2007, 20(6): 743-747. doi: 10.1088/1674-0068/20/06/743-747

E?ect of Thermal Treatment on Structure and Catalytic Activity of Supported Fischer-Tropsch Nano-Cobalt Catalysts for Clean Fuels

doi: 10.1088/1674-0068/20/06/743-747
Funds:  This work was supported by the National Science Foundation of China (No.20590360), the Ministry of Sciences and Technologies of China (2005CB221406), and the New Century Excellent Talent of Ministry of Education of China (NCET-05-0783).
  • Received Date: 2007-08-30
  • Rev Recd Date: 2007-09-06
  • "A series of 15%Co/Al2O3 catalysts were prepared by incipient wetness impregnation under various calcination conditions (90-500 oC), and were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy experiments (XPS), temperature programmed reduction, and catalytic measurements of hydrogenation of carbon monoxide to long-chained hydrocarbons leading to clean fuels (Fischer-Tropsch synthesis). The results of XPS show the presence of incompletely decomposed cobalt nitrate for catalysts calcined at 90-200 oC, and the presence of Co3O4 for catalysts calcined at 200-500 oC. For the four alumina-supported nano cobalt catalysts with different thermal treatment (200-500 oC), XRD and XPS results illustrated that there were mainly nano Co3O4 crystalite phases of 9-10 nm and the size of cobalt nano-particles did almost not change with the different temperature of thermal treatment. This was different from that of silica-supported cobalt catalysts. The supported cobalt catalyst (CoAp340 sample) calcinated at 340 oC presented a better activity for Fischer Tropsch synthesis to clean fuels, at mild conditions like atmospheric pressure (100 kPa), 1800 mL/g/h and 190 oC; rather than high pressure (2 MPa or more)."
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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E?ect of Thermal Treatment on Structure and Catalytic Activity of Supported Fischer-Tropsch Nano-Cobalt Catalysts for Clean Fuels

doi: 10.1088/1674-0068/20/06/743-747
Funds:  This work was supported by the National Science Foundation of China (No.20590360), the Ministry of Sciences and Technologies of China (2005CB221406), and the New Century Excellent Talent of Ministry of Education of China (NCET-05-0783).

Abstract: "A series of 15%Co/Al2O3 catalysts were prepared by incipient wetness impregnation under various calcination conditions (90-500 oC), and were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy experiments (XPS), temperature programmed reduction, and catalytic measurements of hydrogenation of carbon monoxide to long-chained hydrocarbons leading to clean fuels (Fischer-Tropsch synthesis). The results of XPS show the presence of incompletely decomposed cobalt nitrate for catalysts calcined at 90-200 oC, and the presence of Co3O4 for catalysts calcined at 200-500 oC. For the four alumina-supported nano cobalt catalysts with different thermal treatment (200-500 oC), XRD and XPS results illustrated that there were mainly nano Co3O4 crystalite phases of 9-10 nm and the size of cobalt nano-particles did almost not change with the different temperature of thermal treatment. This was different from that of silica-supported cobalt catalysts. The supported cobalt catalyst (CoAp340 sample) calcinated at 340 oC presented a better activity for Fischer Tropsch synthesis to clean fuels, at mild conditions like atmospheric pressure (100 kPa), 1800 mL/g/h and 190 oC; rather than high pressure (2 MPa or more)."

Wei Chu, J. P Hong, A.Khodakovb, E. Payen, X. Y. Dai. E?ect of Thermal Treatment on Structure and Catalytic Activity of Supported Fischer-Tropsch Nano-Cobalt Catalysts for Clean Fuels[J]. Chinese Journal of Chemical Physics , 2007, 20(6): 743-747. doi: 10.1088/1674-0068/20/06/743-747
Citation: Wei Chu, J. P Hong, A.Khodakovb, E. Payen, X. Y. Dai. E?ect of Thermal Treatment on Structure and Catalytic Activity of Supported Fischer-Tropsch Nano-Cobalt Catalysts for Clean Fuels[J]. Chinese Journal of Chemical Physics , 2007, 20(6): 743-747. doi: 10.1088/1674-0068/20/06/743-747

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