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Article

Effect of Textural Properties and Presence of Co-Cation on NH3-SCR Activity of Cu-Exchanged ZSM-5

1
Institute of Chemical Technology, Universität Leipzig, Linnéstr. 3, 04103 Leipzig, Germany
2
Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Kraków, Poland
3
Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, 1001 Ljubljana, Slovenia
4
Felix Bloch Institute for Solid State Physics, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Jose L. Hueso
Catalysts 2021, 11(7), 843; https://doi.org/10.3390/catal11070843
Received: 14 June 2021 / Revised: 5 July 2021 / Accepted: 7 July 2021 / Published: 13 July 2021
(This article belongs to the Special Issue Structured Materials for Catalytic Applications)
Comparative studies over micro-/mesoporous Cu-containing zeolites ZSM-5 prepared by top-down treatment involving NaOH, TPAOH or mixture of NaOH/TPAOH (tetrapropylammonium hydroxide) were conducted. The results of the catalytic data revealed the highest activity of the Cu-ZSM-5 catalyst both in the absence and presence of water vapor. The physico-chemical characterization (diffuse reflectance UV-Vis (DR UV-Vis), Fourier transform infrared (FT-IR) spectroscopy, electron paramagnetic resonance (EPR) spectroscopy, temperature-programmed desorption of NOx (TPD-NOx), and microkinetic modeling) results indicated that the microporous structure of ZSM-5 effectively stabilized isolated Cu ion monomers. Besides the attempts targeted to the modification of the textural properties of the parent ZSM-5, in the next approach, we studied the effect of the co-presence of sodium and copper cations in the microporous H-ZSM-5. The presence of co-cation promoted the evolution of [Cu–O–Cu]2+ dimers that bind NOx strongly with the desorption energy barrier of least 80 kJ mol−1. Water presence in the gas phase significantly decreases the rate of ammonia oxidation, while the reaction rates and activation energies of NH3-SCR remain unaffected. View Full-Text
Keywords: zeolite ZSM-5; micro-/mesoporous zeolites; copper; co-cation; NH3-SCR zeolite ZSM-5; micro-/mesoporous zeolites; copper; co-cation; NH3-SCR
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MDPI and ACS Style

Jabłońska, M.; Góra-Marek, K.; Grilc, M.; Bruzzese, P.C.; Poppitz, D.; Pyra, K.; Liebau, M.; Pöppl, A.; Likozar, B.; Gläser, R. Effect of Textural Properties and Presence of Co-Cation on NH3-SCR Activity of Cu-Exchanged ZSM-5. Catalysts 2021, 11, 843. https://doi.org/10.3390/catal11070843

AMA Style

Jabłońska M, Góra-Marek K, Grilc M, Bruzzese PC, Poppitz D, Pyra K, Liebau M, Pöppl A, Likozar B, Gläser R. Effect of Textural Properties and Presence of Co-Cation on NH3-SCR Activity of Cu-Exchanged ZSM-5. Catalysts. 2021; 11(7):843. https://doi.org/10.3390/catal11070843

Chicago/Turabian Style

Jabłońska, Magdalena, Kinga Góra-Marek, Miha Grilc, Paolo C. Bruzzese, David Poppitz, Kamila Pyra, Michael Liebau, Andreas Pöppl, Blaž Likozar, and Roger Gläser. 2021. "Effect of Textural Properties and Presence of Co-Cation on NH3-SCR Activity of Cu-Exchanged ZSM-5" Catalysts 11, no. 7: 843. https://doi.org/10.3390/catal11070843

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