کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
56531 47086 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A comparative study of the NH3-SCR reactions over a Cu-zeolite and a Fe-zeolite catalyst
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
A comparative study of the NH3-SCR reactions over a Cu-zeolite and a Fe-zeolite catalyst
چکیده انگلیسی

The NH3-SCR (selective catalytic reduction) reactions were systematically investigated over a commercial copper zeolite catalyst in view of its application to the DeNOx aftertreatment of exhaust gases from light- and heavy-duty Diesel engines. Catalytic activity data were collected at high space velocities in both steady state and dynamic runs over the catalyst in the form of powder, in order to derive intrinsic kinetic information in a wide temperature range.Results were also compared to those obtained over a commercial iron zeolite catalyst under similar conditions. With respect to the iron-based catalyst, the copper zeolite system showed a higher ammonia storage capacity, a higher activity in the ammonia oxidation reaction and in the Standard SCR reaction, and its DeNOx activity was found less sensitive to the NO2 feed content. As opposite to the iron zeolite, over the copper zeolite no inhibiting effect of ammonia on the Standard SCR reaction was observed, while formation of some N2O was detected even in the absence of NO2 in the gas feed mixture.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 151, Issues 3–4, 19 June 2010, Pages 223–230
نویسندگان
, , ,