Nanosized Cu-containing ZSM-5 catalysts with different n(Si)/
n(Al) ratio of 18.9–50.5 were prepared by ion-exchange. The
physico-chemical characterization clearly shows that the molar
ratio of framework T atoms influences the nature and distribution
of copper species. According to DR UV-Vis, TPR-H2, EPR, or
FT-IR spectroscopy analyses, the amount of aggregated copper
species increases with increasing the framework n(Si)/n(Al) ratio.
Thus, the activity of the Cu-containing ZSM-5 with n(Si)/n(Al)
ratio of 47.0—50.5 in the selective catalytic NO reduction with
NH3 (NH3-SCR-DeNOx) significantly decreases compared to the
other materials (n(Si)/n(Al) ratio of 18.9—19.6). The reaction
mechanism has been discussed in light of the results of 2D COS
(two-dimensional correlation spectroscopy) analysis of IR spectra
and catalytic properties of the zeolites. The results make
evident that enhanced activity of Cu-containing ZSM-5 in NH3-
SCR-DeNOx is correlated with the formation of different NOx
under the experimental conditions.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:92909 |
| Date | 05 August 2024 |
| Creators | Jabłońska, Magdalena, Góra-Marek, Kinga, Bruzzese, Paolo Cleto, Palčić, Ana, Pyra, Kamila, Tarach, Karolina, Bertmer, Marko, Poppitz, David, Pöppl, Andreas, Gläser, Roger |
| Publisher | Wiley-VCH |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 1867-3880, 1867-3899, 10.1002/cctc.202200627 |
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