Accessible Requires Authentication Published by De Gruyter August 22, 2013

Fabrication and Characterization of Bimetallic Mordenite-Zeolite Catalysts for Low Temperature Direct Decomposition of N2O Emitted from Nitric Acid Plants∗

Herstellung und Charakterisierung von bimetallischen Mordenit-Zeolit-Katalysatoren für den direkten Abbau des N2O-Ausstosses in Salpetersäurefabriken
Minhye Seo, Sung-Su Cho, Byung-Chan Kwyon and Sungkyu Lee
From the journal Materials Testing

Abstract

In this research, the mordenite based catalysts for direct decomposition of N2O have been prepared and characterized for their direct decomposition performance at the operating temperature of 300–550 °C commonly encountered in the nitric acid plants tail gases. The zeolite catalyst was prepared by 2 steps: 1. Precursor wet ion exchange, 2. Precursor impregnation. The bi-metallic catalyst thus prepared shows an excellent N2O decomposition performance. The total conversion efficiency of Pt-Fe-MOR catalyst has been achieved at 390 °C. XPS analysis confirmed platinum on mordenite supports in two forms: PtO and PtO2 species interact with oxygen ions at the metal/support interface. Deposition of Pt as a promoter on the surface of Fe-mordenite results in a considerable enhancement of catalytic activity.

Abstract

In den Forschungsarbeiten für diesen Beitrag wurden Mordenit-basierte Katalysatoren für den direkten Abbau von N2O hergestellt und hinsichtlich ihrer direkten Abbaufähigkeit bei typischen Betriebstemperaturen von 300–500 °C, die häufig bei Restgasen der Salpetersäureherstellung auftreten, charakterisiert. Der Zeolit-Katalysator wurde in zwei Schritten hergestellt: 1. Precursor-Nass-Ionenaustausch, 2. Precursor-Imprägnierung. Der so präparierte Bimetallkatalysator zeigte eine exzellente Performanz hinsichtlich des N2O-Abbaus. Eine vollständige Umsetzung mit bester Effizienz des Pt-Fe-MOR Katalysators wurde bei 390 °C erreicht. Die XPS-Analyse bestätigte, dass Platin auf dem Mordenit in zweifacher Hinsicht unterstützend wirkt: PtO und PtO2 wechselwirken mit Sauerstoffionen an der Metall-Support-Grenzfläche. Die Dekomosition von Pt als Promotor auf der Fe-Mordenit-Oberfläche ergibt eine beachtliche Erhöhung der Katalysatoraktivität.


Work leading to this manuscript was performed at Institute for Advanced Engineering (IAE) and all of the legal claims for the research belongs to the IAE


References

1 R. W.van den Brink, S.Booneveld, J. R.Pels, D. F.Bakker, M. J. F. M.Verhaak: Catalytic removal of N2O in model flue gases of a nitric acid plant using a promoted Fe zeolite, Appl. Catal. B: Environ.32 (2001), pp. 738110.1016/S0926-3373(00)00294-0 Search in Google Scholar

2 U. S. Environmental Protection Agency: Inventory of US Greenhouse Gases and Sinks, 1990–1997, EPA, Washington (1999) Search in Google Scholar

3 G.Centi, L.Dall'Olio, S.Perathoner: In-situ activation phenomena of Rh supported on zirconia samples for the catalytic decompo­sition of N2O, Appl. Catal. A: General194/195 (2000), pp. 798810.1016/S0926-860X(99)00356-7 Search in Google Scholar

4 J.Haber, T.Machej, J.Janas, M.Nattich: Catalytic decomposition of N2O, Catal. Today90, (2004), pp. 151910.1016/j.cattod.2004.04.002 Search in Google Scholar

5 F.Kapteijn, J.Rodriguez-Mirasol, J. A.Moulijn: Heterogeneous catalytic decomposition of nitrous oxide, Appl. Catal. B: Environ.9 (1996), pp. 2564 Search in Google Scholar

6 J.Pérez–Ramirez, F.Kapteijn, G.Mul, J. A.Moulijn: NO-assisted N2O decomposition over Fe-based catalysts: effects of gas-phase composition and catalyst constitution, J. Catal.208 (2002), pp. 21122310.1006/jcat.2002.3559 Search in Google Scholar

7 R. S.da Cruz, A. J. S.Mascarenhas, H. M. C.Andrade: Co-ZSM-5 catalysts for N2O decomposition, Appl. Catal. B: Environ.18 (1998), pp. 22323110.1016/S0926-3373(98)00042-3 Search in Google Scholar

8 J.Oi, A.Obuchi, G. R.Bamwenda, A.Ogata, H.Yagita, S.Kushiyama, K.Mizuno: Decomposition of nitrous oxide over rhodium supported catalysts and dependency on feed gas composition, Appl. Catal. B: Environ.12 (1997), pp. 27728610.1016/S0926-3373(96)00079-3 Search in Google Scholar

9 A.Wacław, K.Nowińska, W.Schwieger, A.Zielińska: N2O decomposition over iron modified zeolites ZSM-5, Catal. Today90 (2004), pp. 212510.1016/j.cattod.2004.04.003 Search in Google Scholar

10 H.-Y.Chen, W. M. H.Sachtler: Activity and durability of Fe/ZSM-5 catalysts for lean burn NOx reduction in the presence of water vapor, Catal. Today42 (1998), pp. 738310.1016/S0920-5861(98)00078-9 Search in Google Scholar

Published Online: 2013-08-22
Published in Print: 2013-04-02

© 2013, Carl Hanser Verlag, München