A series of iron functionalized hydroxyapatite (Fe/HAP) samples with different metal loading (2 < wt.% Fe < 13) was prepared by a flash ionic exchange procedure from iron(III) nitrate as precursor and tested in some environmental air-quality protection reactions such as the catalytic reduction of NOx by NH3 (NH3-SCR), catalytic oxidation of NH3 (NH3-SCO) and catalytic N2O decomposition. The catalytic performances of the Fe/HAP catalysts were determined under flow conditions as a function of temperature and using reactant concentrations typical of polluting gaseous emissions from industrial vents. Physico-chemical characterization with various techniques of study (UV-DR and Mössbauer spectroscopies, NH3 titration, N2-physisorption, and XRPD analyses) provided valuable information on Fe-speciation, acidity, morphology, and structure of the samples. In general, highly dispersed Fe3+ centers were the predominant species, irrespective of Fe-loading, while just low percentage (≤15%) of FexOy nanoclusters (2 < size/nm < 4) was detected on the samples. As expected, the differences in iron concentration produced a diversified effect of both catalyst properties and catalytic activity, comprising the conversion and selectivity profiles, different for each reaction considered. The obtained results indicate a good potentiality for the eco-friendly Fe-catalysts for some environmental reactions of air protection.
Environmental Reactions of Air-Quality Protection on Eco-Friendly Iron-Based Catalysts / M.G. Galloni, S. Campisi, S.G. Marchetti, A. Gervasini. - In: CATALYSTS. - ISSN 2073-4344. - 10:12(2020 Dec 03).
|Titolo:||Environmental Reactions of Air-Quality Protection on Eco-Friendly Iron-Based Catalysts|
GALLONI, MELISSA GRETA (Co-primo)
CAMPISI, SEBASTIANO (Co-primo)
GERVASINI, ANTONELLA (Ultimo) (Corresponding)
|Parole Chiave:||Iron-hydroxyapatite; NH3-SCR; NH3-SCO; N2O decomposition; catalyst preparation; catalyst characterization; Mössbauer spectroscopy;|
|Settore Scientifico Disciplinare:||Settore CHIM/03 - Chimica Generale e Inorganica|
Settore CHIM/02 - Chimica Fisica
Settore CHIM/04 - Chimica Industriale
|Data di pubblicazione:||3-dic-2020|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.3390/catal10121415|
|Appare nelle tipologie:||01 - Articolo su periodico|