التفاصيل البيبلوغرافية
| العنوان: |
Post-Synthetically Treated ERI and SSZ-13 Zeolites Modified with Copper as Catalysts for NH 3 -SCR-DeNO x. |
| المؤلفون: |
Robles, Alejandro Mollá, Deplano, Gabriele, Góra-Marek, Kinga, Rotko, Marek, Wach, Anna, Lukman, Muhammad Fernadi, Bertmer, Marko, Signorile, Matteo, Bordiga, Silvia, Pöppl, Andreas, Gläser, Roger, Jabłońska, Magdalena |
| المصدر: |
Catalysts (2073-4344); Jul2024, Vol. 14 Issue 7, p457, 19p |
| مصطلحات موضوعية: |
COPPER catalysts, COPPER, CATALYTIC activity, ULTRAVIOLET-visible spectroscopy, ZEOLITES |
| مستخلص: |
ERI and SSZ-13 were subjected to post-synthetic treatments (depending on the zeolite topology) to create micro-/mesoporous materials. The results in terms of NH3-SCR-DeNOx show that the applied treatments improved the catalytic activity of the Cu-containing ERI-based materials; however, the NO conversion did not vary for the different materials treated with NaOH or NaOH/HNO3. For the micro-/mesoporous Cu-containing SSZ-13, a lower NO conversion in NH3-SCR-DeNOx was observed. Thus, our findings challenge the current paradigm of enhanced activity of micro-/mesoporous catalysts in NH3-SCR-DeNOx. The modification of the supports results in the presence of different amounts and kinds of copper species (especially isolated Cu2+ and aggregated Cu species) in the case of ERI- and SSZ-13-based samples. The present copper species further differentiate the formation of reactive reaction intermediates. Our studies show that besides the μ-η2,η2-peroxo dicopper(II) complexes (verified by in situ DR UV-Vis spectroscopy), copper nitrates (evidenced by in situ FT-IR spectroscopy) also act as reactive intermediates in these catalytic systems. [ABSTRACT FROM AUTHOR] |
|
Copyright of Catalysts (2073-4344) is the property of MDPI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Full Text Finder