کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7835167 1503533 2018 26 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In-situ DRIFTS investigation on the selective catalytic reduction of NO with NH3 over the sintered ore catalyst
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
In-situ DRIFTS investigation on the selective catalytic reduction of NO with NH3 over the sintered ore catalyst
چکیده انگلیسی
In this study, the sintered ore used as catalysts for the selective catalytic reduction (SCR) of NOX with NH3 from the sintering flue gas was investigated. The experimental results demonstrated that the maximum denitration efficiency, about 61.64%, occurred at 300 °C, 1.0 NH3/NO ratio, and 1000 h−1 gas hourly space velocity (GHSV). In order to understand the SCR denitration mechanism, the catalyst was characterized by DRIFTS, XPS, H2-TPR, BET and ICP-MS. It was found that there were Lewis and Brønsted acid sites at the surface of the sintered ore, which lead to the appearance of amide species (NH2), NH4+ intermediates, gaseous or weakly adsorbed NO2 and nitrite species. Hence, it was concluded that the reaction of the amide species (NH2) with gaseous NO (E-R mechanism) and the reaction of absorbed NO2 with the coordinated ammonia (L-H mechanism) were attributed to NOx reduction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 439, 1 May 2018, Pages 75-81
نویسندگان
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