Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/48077

TitleMono and bimetallic NaY catalysts with high performance in nitrate reduction in water
Author(s)Soares, Olívia S. G. P.
Marques, Luísa
Freitas, Cátia M. A. S.
Fonseca, A. M.
Parpot, Pier
Órfão, José J. M.
Pereira, Manuel F. R.
Neves, Isabel C.
Keywords100% conversion
CuPd bimetallic catalysts
NaY zeolite
Nitrate reduction
Water
Issue date2015
PublisherElsevier
JournalChemical Engineering Journal
Abstract(s)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.
TypeArticle
URIhttp://hdl.handle.net/1822/48077
DOI10.1016/j.cej.2015.06.093
ISSN1385-8947
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDQuim - Artigos (Papers)

Files in This Item:
File Description SizeFormat 
Chemical Engineering Journal 281 (2015) 411–417.pdf
  Restricted access
1,06 MBAdobe PDFView/Open    Request a copy!

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID