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Pérez Vélez,  Roxana

Structural characterization of iron species in Fe-ZSM-5 catalysts and the elucidation of their role in the mechanism of NOx reactions

Rostock : Universität , 2015

https://doi.org/10.18453/rosdok_id00001491

http://purl.uni-rostock.de/rosdok/id00001491

Abstract:

The selective catalytic reduction of NOx by ammonia (NH3-SCR) has widely applied in the abatement of NOx. Fe-ZSM-5 is a potential catalyst, showing high performance in standard SCR (mainly NO) at > 400°C and in fast SCR (NO/NO2 = 1) at ≥ 250°C. The identification of the active species in Fe-ZSM-5 catalysts and reaction mechanism for SCR reactions were investigated by in situ and operando EPR, UV-Vis and FTIR spectroscopy. The spectroscopic studies demonstrate the role of NO2 to reoxidize isolated Fe(II) to the active Fe(III) at β and γ sites, and attribute them the higher activity in fast SCR.

Dissertation Open Access


Einrichtung :
Mathematisch-Naturwissenschaftliche Fakultät
Gutachter :
Ludwig,  Ralf  (Prof. Dr.)
Brückner,  Angelika  (Prof. Dr.)
Jahr der Abgabe:
2014
Jahr der Verteidigung:
2015
Sprache(n) :
Englisch
Schlagworte:
NH3-SCR of NOx, operando EPR spectroscopy, in situ FTIR and UV-Vis spectroscopy, active sites, reaction mechanism
DDC Klassifikation :
540 Chemie
URN :
urn:nbn:de:gbv:28-diss2015-0041-9
Persistente URL:
http://purl.uni-rostock.de/rosdok/id00001491
erstellt am:
2015-02-16
zuletzt geändert am:
2018-06-30
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