کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
57271 | 47113 | 2008 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis, characterization and evaluation of NiMo/SiO2–Al2O3 catalysts prepared by the pH-swing method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
NiMo/(X)SiO2–Al2O3 catalysts were synthesized with various SiO2 contents (X = 0, 10, 25 and 50 wt%) using the pH-swing method. In order to find the optimum SiO2 content, the catalysts were evaluated in the hydrodesulfurization of 4,6-DMDBT, hydrogenation of naphthalene and hydrodenitrogenation of carbazole. Kinetic parameters of Langmuir–Hinshelwood type equations for all the reaction systems were estimated. FTIR analysis of CO adsorption for the sulfided catalysts shows that the amount of coordinatively unsaturated Mo sites promoted by nickel (CUS-NiMoS) follows the order NiMo/10ASA > NiMo/25ASA > NiMo/0ASA. This tendency agrees with the results obtained in catalytic activity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 130, Issues 2–4, 30 January 2008, Pages 337–344
Journal: Catalysis Today - Volume 130, Issues 2–4, 30 January 2008, Pages 337–344
نویسندگان
César Fernández-Vargas, Jorge Ramírez, Aída Gutiérrez-Alejandre, Felipe Sánchez-Minero, Rogelio Cuevas-García, Pablo Torres-Mancera,