کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9610537 | 47182 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Selective catalytic reduction of NOx over Ag/Al2O3 catalyst: from reaction mechanism to diesel engine test
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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![عکس صفحه اول مقاله: Selective catalytic reduction of NOx over Ag/Al2O3 catalyst: from reaction mechanism to diesel engine test Selective catalytic reduction of NOx over Ag/Al2O3 catalyst: from reaction mechanism to diesel engine test](/preview/png/9610537.png)
چکیده انگلیسی
Our recent research works on the selective catalytic reduction (SCR) of diesel engine NOx by hydrocarbons over alumina-supported silver (Ag/Al2O3) were reviewed. The reaction mechanism of the SCR of NOx by C2H5OH over Ag/Al2O3 was studied using in situ DRIFTS and DFT calculations. A novel enolic species originating from the partial oxidation of C2H5OH and C3H6, was found on the surface of Ag/Al2O3 during the SCR of NOx by in situ DRIFTS, which was also supported by DFT calculations. Based on this, a mechanism of the NOx reduction was proposed, which can successfully explain the high efficiency of the NOx reduction by C2H5OH over Ag/Al2O3. A palladium promoted Ag/Al2O3 catalyst (denoted Ag-Pd/Al2O3) was developed for the SCR of NOx by C3H6. The Ag-Pd/Al2O3 showed a higher NOx conversion than Ag/Al2O3, especially at temperatures ranging from 300 to 450 °C. The engine bench tests showed that the average NOx conversion was greater than 80% in the diesel engine exhaust temperature range of 300-400 °C using our catalytic converter with C2H5OH as reductant, which represents a leap from the Euro II standard to the Euro III standard for NOx emission control in diesel engines.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 100, Issues 1â2, 15 February 2005, Pages 37-47
Journal: Catalysis Today - Volume 100, Issues 1â2, 15 February 2005, Pages 37-47
نویسندگان
Hong He, Yunbo Yu,