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EnglishA 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 |
| Autori: | 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 |
| Rivista: | |
| Tipologia: | Article (author) |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.3390/catal10121415 |
| Appare nelle tipologie: | 01 - Articolo su periodico |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| catalysts-10-01415-v2.pdf | Publisher's version/PDF | Open Access Visualizza/Apri |
http://hdl.handle.net/2434/796883
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