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• W2071740040 abstract "The reaction performance of partial oxidation of methane (POM) by air over Ni/SiO2 catalysts was investigated using monodisperse silica sol [H.E. Bergna, in: H.E. Bergna (Ed.), The Colloid Chemistry of Silica, Adv. Chem. Ser. 234, The American Chemical Society Press, Washington, DC, 1994, p. 1.] as supporting precursor in a fixed micro-reactor at atmospheric pressure. The distribution of SiO2 particles in silica sol was imaged by transmission electron microscopy (TEM). Ni/silica-sol catalyst has an excellent performance during partial oxidation of methane, and methane oxidation greatly depends on the concentration of O2. At 800 °C, when the CH4/O2 molar ratio is ca. 2, about 96% of CH4 conversion is achieved, and the selectivities of H2 and CO are above 98% and 95%, respectively. The reaction products are mainly H2, H2O and CO2 at low temperature; a large amount of heat is released to sustain the POM reactions for a long time while the temperature of the surroundings is close to room temperature. The facts indicate that the catalyst has high activity and that the POM reaction can be ignited by H2 injection at low temperature. The structure and the reducing properties of these catalysts were characterized by BET, temperature programmed reduction (TPR) and powder X-ray diffraction (XRD) methods. XRD patterns also indicate that oxygen is completely consumed on the top layer of the catalysts; and the active species of catalyst can fully sustain Ni0 phase under low reaction temperature in water-rich product mixtures." @default.
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• W2071740040 date "2004-10-01" @default.
• W2071740040 modified "2023-09-23" @default.
• W2071740040 title "Reaction performance of partial oxidation of methane over Ni/SiO2 catalysts using monodisperse silica sol as supporting precursor" @default.
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• W2071740040 doi "https://doi.org/10.1016/j.apcata.2004.06.026" @default.
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