کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
52055 46864 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the stepwise change of activation energies in the hydrodechlorination of chlorobenzene over supported nickel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
On the stepwise change of activation energies in the hydrodechlorination of chlorobenzene over supported nickel
چکیده انگلیسی

Kinetics of chlorobenzene hydrodechlorination have been measured over Ni on SiO2, Al2O3, MgO, activated carbon and graphite. A stepwise variation of Ea is analysed using the selective energy transfer model where Ea is identified as the vibrational energy associated with an excitation of the chlorobenzene out-of-plane C–H bending mode. Variation of Ea with vibrational quantum number yields a vibrational frequency of 749 cm−1 and a value (−1.1 cm−1) for the anharmonicity term, which is characteristic of bending vibrational modes. Our analysis suggests that the reacting species are weakly adsorbed on the catalyst: heat of adsorption = −0.31 kJ mol−1.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 9, Issue 3, 1 March 2008, Pages 333–336
نویسندگان
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