کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
153587 456532 2008 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Kinetics of ammonia oxidation over Pt foil studied in a micro-structured quartz-reactor
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Kinetics of ammonia oxidation over Pt foil studied in a micro-structured quartz-reactor
چکیده انگلیسی

The kinetics of Pt-catalyzed ammonia oxidation on polycrystalline Pt were investigated at partial pressures of ammonia and oxygen up to 6 kPa and temperatures between 286 and 385 °C, applying a micro-structured reactor that ascertained temperature control of the exothermic reaction. Using literature-based mechanistic models, a micro-kinetic model was derived based on parameter optimization and a model discrimination procedure. The model described the rates of formation of all nitrogen-containing products, i.e. N2, N2O and NO. Catalyst characterization of platinum samples by electron microscopy indicated that reaction-induced restructuring of the Pt surface limited the accuracy of derived kinetic parameters already at the low temperature applied in this work. Despite of necessary simplifications, the best-fitting kinetic model predicted reasonable product selectivities for the reaction conditions of an industrial ammonia burner.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 137, Issue 2, 1 April 2008, Pages 361–375
نویسندگان
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