Universitat Politècnica de Catalunya
Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques
Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions
2012-10-30
Several Pt–Ag catalysts supported on activated carbon powder were tested in the catalytic reduction of nitrates in a continuous flow reactor. The influence of the noble metal precursor (Pt(NH3)4(NO3)2 or H2PtCl6), the Pt/Ag atomic ratio (0.3, 1.1 and 1.8) and the metal loading (3% or 1% Pt) were studied. The samples were characterized by XRD, TPR, HRTEM, XPS, H2-chemisorption and nitrogen physisorption. The results showed that the most important variables affecting the catalytic activity are the noble metal precursor and the metal loading, whereas the Pt/Ag atomic ratio does not affect significantly the catalytic behavior. The use of H2PtCl6 instead of Pt(NH3)4(NO3)2 as noble metal precursor leads to more active catalysts. The nitrate conversion is enhanced by the high metal loading (3%).
Postprint (published version)
Article
English
Àrees temàtiques de la UPC::Enginyeria dels materials::Metal·lúrgia; Àrees temàtiques de la UPC::Enginyeria química::Química física; Catalysts; Chemical reactors; Pt-Ag; Catalytic nitrates reduction; Metal content; Packed bed reactor; Surface metal chemistry; Catalitzadors; Metalls
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Restricted access - publisher's policy
Attribution-NonCommercial-NoDerivs 3.0 Spain
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