Copper exchanged ultrastable zeolite Y - A catalyst for NH3-SCR of NOx from stationary biogas engines

J. Ochońska, D. McClymont, P.J. Jodłowski, A. Knapik, B. Gil, W. Makowski, W. Łasocha, A. Kołodziej, Stanislaw T Kolaczkowski, J. Łojewska

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29 Citations (Scopus)

Abstract

NO x emissions will need to be controlled from gas engines, which in the future could be using a syngas/producer gas as a fuel (generated from the gasification of biomass). In anticipation of this need, the activity of a copper-exchanged ultrastabilized zeolite Y was investigated, for the selective catalytic reduction of NO x . The catalyst performance and properties were compared with reference samples of Cu-exchanged un-stabilized Y and Cu exchanged ZSM-5 zeolites. Activity was related to the number and nature of active centers, which were determined by in situ FTIR and TPD experiments using CO, NO, and NH 3 as probe molecules. In the test reaction the ultrastabilized Cu-USY catalyst showed high activity at low temperatures and offered high hydrothermal resistance, whilst the Cu-ZSM-5 catalyst demonstrated the highest overall activity. The observed low temperature activity of the ultrastabilized Cu-USY catalyst was linked to the high abundance of Cu + sites, which were detected by in situ FTIR analyses using CO adsorption.
Original languageEnglish
Pages (from-to)6-11
Number of pages6
JournalCatalysis Today
Volume191
Issue number1
DOIs
Publication statusPublished - 15 Sep 2012

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