Porous nickel based catalysts for partial oxidation of methane to synthesis gas

• Published in: Applied catalysis. A, General Vol. 401; no. 1; pp. 170 - 175
• Main Authors: Kirillov, V.A., Fedorova, Z.A., Danilova, M.M., Zaikovskii, V.I., Kuzin, N.A., Kuzmin, V.A., Krieger, T.A., Mescheryakov, V.D.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.07.2011
• Subjects: Calcination; Catalysis; Catalysts; Magnesium oxide; Methane; Nickel; Nickel catalysts; Oxidation; Partial oxidation of methane; Synthesis gas; Texture; Nickel catalysts; Synthesis gas; Partial oxidation of methane
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/j.apcata.2011.05.018

[Display omitted] ► The texture of Ni catalysts supported on porous Ni with MgO underlayer was studied. ► In reduced Ni catalysts phases of Ni and solid solution of NiO in MgO were observed. ► A considerable part of nickel crystallites is epitaxially bound with MgO. ► The activity of Ni catalysts decreased slightly after 100 h of testing in POM. ► No carbon deposition was detected by TEM in tested samples. The phase composition and texture of nickel catalysts supported on ribbon porous nickel with a magnesium oxide underlayer were investigated by X-ray diffraction, low-temperature nitrogen adsorption, and electron microscopy combined with energy dispersive X-ray microanalysis. The MgO underlayer was obtained by impregnation the porous nickel with a Mg(NO 3) 2 solution followed by calcination at 550 °C; nickel was supported additionally by impregnation with a Ni(NO 3) 2 solution followed by calcination at 450 °C. In the supported reduced nickel catalysts (800–900 °C, H 2) the phases of Ni and a solid solution of NiO in MgO were observed; a considerable part of nickel crystallites was epitaxially bound with MgO. The partial oxidation of methane to synthesis gas (800 °С, O 2/C = 0.65, GHSV = 127 L/g h) over porous nickel based catalysts was studied. The activity of initial nickel support decreased considerably during the partial oxidation of methane; the value of methane conversion decreased slightly after 100 h of testing on the supported nickel catalysts.