کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10244729 | 47700 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The role of NO in the mechanism of NOx reduction with ammonia over a BaNa-Y catalyst
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
NO reduces HNO3 to HONO and surface nitrates to nitrites on a BaNa-Y zeolite, and it reacts with NO2 to form N2O3. Data are also presented which show that adsorbed NO+ reacts with water to form HONO. In the presence of NH3 and H2O these processes lead to the formation of ammonium nitrite, which efficiently decomposes near 100â°C to N2 + H2O, effecting the catalytic reduction of NOx to N2. A criterion for this path is that the optimum yield of N2 is obtained with an equimolar mixture of NO + NO2. Since ammonium nitrate, which can also form on this catalyst, does not significantly decompose at 200â°C, a typical temperature for diesel exhaust, the reduction of nitrate to nitrite serves to regenerate active sites on the BaNa-Y zeolite.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 231, Issue 1, 1 April 2005, Pages 181-193
Journal: Journal of Catalysis - Volume 231, Issue 1, 1 April 2005, Pages 181-193
نویسندگان
Young Hoon Yeom, Juan Henao, Mei Jun Li, Wolfgang M.H. Sachtler, Eric Weitz,