کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5350995 | 1503666 | 2014 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of impregnation protocol in the metallic sites of Pt-Ag/activated carbon catalysts for water denitration
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of impregnation protocol in the metallic sites of Pt-Ag/activated carbon catalysts for water denitration Effect of impregnation protocol in the metallic sites of Pt-Ag/activated carbon catalysts for water denitration](/preview/png/5350995.png)
چکیده انگلیسی
The influence of the Pt precursor and the impregnation protocol in the catalytic behavior of 3%Pt-1.5%Ag supported on activated carbon for water denitration in a continuous reactor was studied. Pt(NH3)4(NO3)2 and H2PtCl6 were selected as Pt precursors. Five protocols were investigated: sequential impregnations (both sequences), co-impregnation, physical mixture of monometallic catalysts, and physical mixture of a bimetallic catalyst with a Pt monometallic catalyst. The samples were characterized by XRD, XPS, TPR, HRTEM and physisorption. It was found that the catalytic activity strongly depends on the synthesis protocol and the Pt precursor, which modify the particle size. Higher nitrate rates are achieved using H2PtCl6 than Pt(NH3)4(NO3)2; this is mainly related to the smaller metal particle size of the former, evidenced by HRTEM. Nitrate consumption rate is directly related with the mean particle size. The physical mixture of monometallic catalysts resulted in the highest nitrogen rate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 298, 15 April 2014, Pages 75-89
Journal: Applied Surface Science - Volume 298, 15 April 2014, Pages 75-89
نویسندگان
A. Aristizábal, S. Contreras, N.J. Divins, J. Llorca, F. Medina,