Structure-activity relations for Ni-containing zeolites during NO reduction. I. Influence of acid sites

B.I. Mosqueda Jimenez, A. Jentys, Kulathuiyer Seshan, J.A. Lercher

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Abstract

The influence of the zeolite structure on the catalytic properties for the reduction of NO with propane and propene was studied. A relation between concentration and strength of acid sites and the activity of Ni-exchanged ZSM-5, MOR, and MCM-22 was found. Ni/ZSM-5, which contains a high concentration of strong acid sites, is the most active catalyst for the NO reduction with propane. Using propene as reductant Ni/ZSM-5 and Ni/MCM-22 rapidly deactivate due to the acid site-catalyzed formation of carbonaceous deposits, while Ni/MOR is less affected by the deposits formed because of its larger pore size.
Original languageUndefined
Pages (from-to)348-353
Number of pages6
JournalJournal of catalysis
Volume218
Issue number2
DOIs
Publication statusPublished - 2003

Keywords

  • Acid site concentration
  • Hydrocarbon-SCR
  • Propane
  • IR-75022
  • Ni-exchanged zeolites
  • Structure
  • METIS-213876
  • Propene

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