Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/106443
Author(s): Olívia S. G. P. Soares
Luísa Marques
Cátia M. A. S. Freitas
António M. Fonseca
Pier Parpot
José J. M. Orfão
Manuel F. R. Pereira
Isabel C. Neves
Title: Mono and bimetallic NaY catalysts with high performance in nitrate reduction in water
Issue Date: 2015
Abstract: The catalytic reduction of nitrate in water was performed with mono and bimetallic catalysts based on NaY zeolite. Four catalysts, two monometallic (Cu-Y and Pd-Y) and two bimetallic (CuPd-Y and PdCu-Y) were prepared by the ion-exchange method using the faujasite zeolite in the sodium form (NaY, 700 nm). The contents of promoter and noble metals were kept in the range of 0.60-0.84 wt% for copper and 0.92-1.80 wt% for palladium. Characterization by several methods: spectroscopic techniques (FTIR, XRD), chemical analysis, nitrogen adsorption, scanning electron microscopy (SEM), temperature programmed reduction (TPR) and cyclic voltammetric, demonstrated that ion exchange of the metals into NaY zeolite was successful. The catalytic behavior of the catalysts was evaluated in a semi-batch reactor, working at room temperature and pressure. The best catalyst was obtained with the pair copper and palladium (0.64 wt% of Cu and 1.80 wt% of Pd), which allowed 100% nitrate conversion with selectivities to nitrogen as high as 94% under the conditions tested.
URI: https://hdl.handle.net/10216/106443
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/UID/EQU/50020/2013- POCI-01-0145-FEDER-006984/Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais/LSRE-LCM
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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