Szczegóły publikacji
Opis bibliograficzny
Catalytic performance of Ti-MCM-22 modified with transition metals (Cu, Fe, Mn) as $NH_{3}$-SCR catalysts / Aleksandra Jankowska, Natalia Kokowska, Klaudia Fidowicz, Małgorzata Rutkowska, Andrzej Kowalczyk, Włodzimierz MOZGAWA, Irena Brunarska, Lucjan Chmielarz // Catalysts [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 2073-4344 . — 2025 — vol. 15 iss. 1 art. no. 60, s. 1–27. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 24–27, Abstr. — Publikacja dostępna online od: 2025-01-11. — A. Jankowska – afiliacja: Faculty of Chemistry, Jagiellonian University
Autorzy (8)
- Jankowska Aleksandra
- Kokowska Natalia
- Fidowicz Klaudia
- Rutkowska Małgorzata
- Kowalczyk Andrzej
- AGHMozgawa Włodzimierz
- Brunarska Irena
- Chmielarz Lucjan
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 164032 |
|---|---|
| Data dodania do BaDAP | 2025-11-18 |
| Tekst źródłowy | URL |
| DOI | 10.3390/catal15010060 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Catalysts |
Abstract
In the presented work, titanosilicate with the MWW structure (Ti-MWW) was hydrothermally synthesized using boron and titanium precursors, with piperidine as a structure-directing agent. The resulting layered zeolite precursor, with a Si/Ti molar ratio of 50, was treated in an HNO3 solution to remove extraframework Ti and B species. The acid-modified zeolite was functionalized with transition metal cations (Cu2+, Fe2+, Mn2+) and trinuclear oligocations (Fe(3) and Mn(3)). The application of this catalytic system is supported by the presence of titanium in the catalytic support structure—similar to a commercial system, V2O5–TiO2. The obtained samples were characterized with respect to their structure (P-XRD, DRIFT), textural parameters (low-temperature N2 sorption), surface acidity (NH3-TPD), transition metal content (ICP-OES) and form (UV–vis DRS) as well as catalyst’s reducibility (H2-TPR). Ti-MWW zeolite samples modified with transition metals were evaluated as catalysts for the selective catalytic reduction of NO with ammonia (NH3-SCR). The effective temperature range for the NO conversion varied depending on the type of active phase used to functionalize the porous support. The catalytic performance was influenced by transition metal content, its form, and accessibility for reactants as well as interactions between the active phase and titanium-containing support. Among the catalysts tested, the copper-modified Ti-MWW zeolite showed the most promising results, maintaining 90% NO conversion rates across a relatively broad temperature range from 200 to 325 °C. This catalyst meets the requirements of modern NH3-SCR installations, which aim to operate in the low-temperature region, below 250 °C.
