کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
41575 45893 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Porous nickel based catalysts for partial oxidation of methane to synthesis gas
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Porous nickel based catalysts for partial oxidation of methane to synthesis gas
چکیده انگلیسی

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(NO3)2 solution followed by calcination at 550 °C; nickel was supported additionally by impregnation with a Ni(NO3)2 solution followed by calcination at 450 °C. In the supported reduced nickel catalysts (800–900 °C, H2) 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, O2/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.

Figure optionsDownload high-quality image (270 K)Download as PowerPoint slideHighlights
► 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 401, Issues 1–2, 15 July 2011, Pages 170–175
نویسندگان
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