Szczegóły publikacji
Opis bibliograficzny
Catalytic performance of one-pot synthesized Fe-MWW layered zeolites (MCM-22, MCM-36, and ITQ-2) in selective catalytic reduction of nitrogen oxides with ammonia / Agnieszka SZYMASZEK-WAWRYCA, Urbano Díaz, Bogdan SAMOJEDEN, Monika MOTAK // Molecules [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 1420-3049. — 2022 — vol. 27 iss. 9 art. no. 2983, s. 1-23. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 20-23, Abstr. — Publikacja dostępna online od: 2022-05-06
Autorzy (4)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 140092 |
|---|---|
| Data dodania do BaDAP | 2022-05-12 |
| Tekst źródłowy | URL |
| DOI | 10.3390/molecules27092983 |
| Rok publikacji | 2022 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Molecules |
Abstract
The application of layered zeolites of MWW topology in environmental catalysis has attracted growing attention in recent years; however, only a few studies have explored their performance in selective catalytic reduction with ammonia (NH3-SCR). Thus, our work describes, for the first time, the one-pot synthesis of Fe-modified NH3-SCR catalysts supported on MCM-22, MCM-36, and ITQ-2. The calculated chemical composition of the materials was Si/Al of 30 and 5 wt.% of Fe. The reported results indicated a correlation between the arrangement of MWW layers and the form of iron in the zeolitic structure. We have observed that one-pot synthesis resulted in high dispersion of Fe3+ sites, which significantly enhanced low-temperature activity and prevented N2O generation during the reaction. All of the investigated samples exhibited almost 100% NO conversion at 250 °C. The most satisfactory activity was exhibited by Fe-modified MCM-36, since 50% of NO reduction was obtained at 150 °C for this catalyst. This effect can be explained by the abundance of isolated Fe3+ species, which are active in low-temperature NH3-SCR. Additionally, SiO2 pillars present in MCM-36 provided an additional surface for the deposition of the active phase.
