کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
57596 47124 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ni-catalysts obtained from silicate intercalated HTlcs active in the catalytic partial oxidation of methane: Influence of the silicate content
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Ni-catalysts obtained from silicate intercalated HTlcs active in the catalytic partial oxidation of methane: Influence of the silicate content
چکیده انگلیسی

Ni-containing silicate catalysts obtained by decomposition of hydrotalcite-like compounds (HTlcs) were tested in the catalytic partial oxidation (CPO) of methane. The effect of the amount of silicates on the properties and performances of catalysts with different nickel load (Ni8Mg60Al32 and Ni2Mg66Al32) was studied. Catalysts were characterized by X-Ray Diffraction (XRD), X-Ray Photoelectron Spectroscopy (XPS), Temperature Programmed Reduction/Oxidation (TPR/O), H2 chemisorption, N2 adsorption/desorption at −196 °C. The amount of silicates determined structural and textural properties of the catalysts forming the forsterite phase after thermal treatment. Increasing the silicate load, the specific surface area (SBET) and the Ni dispersion decreased, but the reducibility of Ni2+ species was not modified. Catalytic activity depended on the nickel load and the amount of silicate anions. Catalysts with high Ni content (Ni8Mg60Al32) were active and stable. Catalysts with low Ni load (Ni2Mg66Al32) showed good catalytic performances at the beginning of the tests; however, the samples with large silicate content deactivated by oxidation of Ni0 particles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 142, Issues 1–2, 15 April 2009, Pages 78–84
نویسندگان
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