Influence of Y Doping on Catalytic Activity of CeO2, MnOx, and CeMnOx Catalysts for Selective Catalytic Reduction of NO by NH3 | Sciact - CRIS-system of Boreskov Institute of Catalysis

Influence of Y Doping on Catalytic Activity of CeO2, MnOx, and CeMnOx Catalysts for Selective Catalytic Reduction of NO by NH3 Full article

Journal

Catalysts
ISSN: 2073-4344

Output data

Year: 2023, Volume: 13, Number: 5, Article number : 901, Pages count : 19 DOI: 10.3390/catal13050901

Tags

NO; selective catalytic reduction; manganese oxide; cerium oxide; yttrium

Authors

La Greca Eleonora ¹ , Kharlamova Tamara S. ² , Grabchenko Maria V. ² , Svetlichnyi Valery A. ³ , Pantaleo Giuseppe ¹ , Consentino Luca ¹ , Stonkus Olga A. ⁴ , Vodyankina Olga V. ² , Liotta Leonarda Francesca ¹

Affiliations

1	Institute for the Study of Nanostructured Materials (ISMN), National Research Council (CNR), Via Ugo La Malfa 153, 90146 Palermo, Italy
2	Laboratory of Catalytic Research, Tomsk State University, Lenin Ave. 36, 634050 Tomsk, Russia
3	Laboratory of Advanced Materials and Technology, Tomsk State University, Lenin Ave. 36, 634050 Tomsk, Russia
4	Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia

Funding (3)

1	Ministry of Science and Higher Education of the Russian Federation	075-15-2021-1388 (121120100067-7)
2	Ministry of Foreign Affairs and International Cooperation	MAE01538512021-10-26
3	Ministry of Education, Universities and Research	ARS01_00334

Novel yttrium-doped CeO2, MnOx, and CeMnOx composites are investigated as catalysts for low-temperature NH3-SCR. The study involves the preparation of unmodified oxide supports using a citrate method followed by modification with Y (2 wt.%) using two approaches, including the one-pot citrate method and incipient wetness impregnation of undoped oxides. The NH3-SCR reaction is studied in a fixed-bed quartz reactor to test the ability of the prepared catalysts in NO reduction. The gas reaction mixture consists of 800 ppm NO, 800 ppm NH3, 10 vol.% O2, and He as a balance gas at a WHSV of 25,000 mL g−1 h−1. The results indicate that undoped CeMnOx mixed oxide exhibits significantly higher deNOx performance compared with undoped and Y-doped MnOx and CeO2 catalysts. Indeed, yttrium presence in CeMnOx promotes the competitive NH3-SCO reaction, reducing the amount of NH3 available for NO reduction and lowering the catalyst activity. Furthermore, the physical-chemical properties of the prepared catalysts are studied using nitrogen adsorption/desorption, XRD, Raman spectroscopy, temperature-programmed reduction with hydrogen, and temperature-programmed desorption of ammonia. This study presents a promising approach to enhancing the performance of NH3-SCR catalysts at low temperatures that can have significant implications for reducing NO emissions.

La Greca E. , Kharlamova T.S. , Grabchenko M.V. , Svetlichnyi V.A. , Pantaleo G. , Consentino L. , Stonkus O.A. , Vodyankina O.V. , Liotta L.F.
Influence of Y Doping on Catalytic Activity of CeO2, MnOx, and CeMnOx Catalysts for Selective Catalytic Reduction of NO by NH3
Catalysts. 2023. V.13. N5. 901 :1-19. DOI: 10.3390/catal13050901 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Apr 5, 2023
Accepted:	May 14, 2023
Published print:	May 17, 2023
Published online:	May 17, 2023

Web of science:	WOS:000998088700001
Scopus:	2-s2.0-85160703036
Elibrary:	54385711
Chemical Abstracts:	2023:1134824
Chemical Abstracts (print):	183:132068
OpenAlex:	W4382488043

DB	Citing
Web of science	5
Scopus	5
OpenAlex	5
Elibrary	4