Szczegóły publikacji
Opis bibliograficzny
The effect of diffusion limitations on the $NH_3–SCR$ process over a shaped Fe-modified clinoptilolite catalyst / Magdalena Saramok, Katarzyna Antoniak-Jurak, Monika Ruszak, Bogdan SAMOJEDEN, Monika MOTAK, Marek INGER // Industrial & Engineering Chemistry Research ; ISSN 0888-5885 . — 2025 — vol. 64 iss. 40, s. 19418–19427. — Bibliogr. s. 19425–19427, Abstr. — Publikacja dostępna online od: 2025-09-26
Autorzy (6)
- Saramok Magdalena
- Antoniak-Jurak Katarzyna
- Ruszak Monika
- AGHSamojeden Bogdan
- AGHMotak Monika
- AGHInger Marek
Dane bibliometryczne
| ID BaDAP | 163744 |
|---|---|
| Data dodania do BaDAP | 2025-12-15 |
| Tekst źródłowy | URL |
| DOI | 10.1021/acs.iecr.5c03158 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Industrial & Engineering Chemistry Research |
Abstract
Research was carried out on the catalytic effect of Fe-modified clinoptilolite in the selective catalytic NOxreduction by NH3(NH3–SCR) in the real tail gas stream, taken from the Łukasiewicz – INS pilot plant for testing the ammonia oxidation process. To obtain a catalyst with the desired textural parameters and increase the acidity of a zeolite and the content of Fe3+active sites, clinoptilolite was modified with iron using a two-stage method, including dealumination and wet impregnation. Catalytic tests were performed over the shaped Fe-modified clinoptilolite to study the effect of diffusion limitations on the overall NH3–SCR reaction rate. The effectiveness factor of the catalyst shaped into pellets was determined based on the Weisz modulus. It was found that diffusion limitations influence the rate of the contact process to a greater extent, the larger the size of the shaped catalyst body. The contact process over the pellets 5.0 mm in diameter and 4.8 mm high occurred in the diffusion regime, and the diffusion limitations were influenced more by Knudsen diffusion than by molecular diffusion. Simulation calculations of the XNOx=f(T,τ) relationship were performed for various sizes of the catalyst pellets. It was found that the temperature had an insignificant effect on the shaped catalyst’s performance within the considered “temperature window”. The pellet size and contact time proved to be significantly more critical for achieving high conversion.
