کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9623865 | 456591 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Performance of selective catalytic exothermic reactions in the “reversed heat wave” mode: a way to improve selectivity
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The paper considers the model system of exothermic catalytic selective and complete conversion reactions, occurring according to the scheme A + m[B] â C + [·], C + [B] â D + [·], B + [·] â [B], where A and B initial reagents, C desired product (of selective conversion), D undesirable by-product (of complete conversion), [B] reagent B, chemisorbed at the catalyst surface, [·] vacant catalyst active site. Numerical simulation of the system behavior in fixed adiabatic catalyst bed showed that being compared to steady-state regimes it is possible to significantly improve the desired product yield and catalyst unit productivity by application of nonstationary regimes, based on periodical, separated in time, feeding of reagents A and B. The most interesting results were obtained for process performance in “reversed heat wave” mode, when temperature front of reaction is moving upstream the flow of the reaction mixture. Such operation regime is characterized with significant decrease of maximum catalyst temperature, therefore, expanded possibility to increase inlet concentration of reagents and with increased selectivity of conversion into target products.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 107, Issues 1â3, 15 March 2005, Pages 133-139
Journal: Chemical Engineering Journal - Volume 107, Issues 1â3, 15 March 2005, Pages 133-139
نویسندگان
Andrey N. Zagoruiko,