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Iron containing anionic clays supported with iron and cerium oxides as catalyst precursors for NOx reduction
Autori: Gabriela Carja, Sofronia Dranca, Elena Husanu, Irina Volf
Data aparitiei: May/June 2009
Revista: Environmental Engineering and Management JournalVol. 8Nr. 3
ISSN: 1843 - 3707
Pret: Gratuit    
Format PDF Format PDF
Abstract A facile and straightforward synthesis route, based on the anionic clay structural â€?memory effect??, has been used to obtain Fe2O3 or CeO2 supported on iron substituted hydrotalcite-like clay (FeLDH). The surface properties of the metal oxide / anionic clay ensembles were studies by X-ray photoelectron spectroscopy (XPS). After calcination at 550°C the derived mixed oxides were tested as new catalysts in the process of the selective catalytic reduction (SCR) of NOx using NH3 as a reductant. The presence of the cerium oxide on the surface of FeLDH improves the catalyst performance in the low temperature range. For the iron oxide supported on the iron substituted hydrotalcite-like clay superior values of NO conversion are obtained for the temperature values within the range (250 - 425)°C. The metal oxides / LDHs formulations can be used to develop further applications in environmental catalysis.


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