Alumina-supported catalysts for NO reduction in an oxidizing atmosphere

Harold H. Kung, Mayfair C. Kung

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Abstract

Catalytic selective reduction of NOx to N2 using a hydrocarbon in an oxidizing atmosphere is challenging because of the competitive reaction of hydrocarbon combustion. Alumina is a rather effective catalyst for this reaction, but it requires high operating temperatures. The activity can be enhanced by adding other catalytic components, such as Pt, Ag, CoOx, or SnO2. Many of these catalyst systems are bifunctional. A substantial portion of the reaction pathway for propene reduction of NOx has been elucidated for SnO2/Al2O3. The function of SnO2 is to oxidize the propene to acrolein, which is then transferred to alumina where it reacts to form acetaldehyde. Reduction of NOx by acetaldehyde on alumina leads to N2. The bifuncational aspect of the catalyst systems offers the potential to improve the catalytic performance by optimizing the individual components.

Original languageEnglish
Pages (from-to)53-59
Number of pages7
JournalJournal of the Chinese Institute of Chemical Engineers
Volume33
Issue number1
Publication statusPublished - Jan 1 2002

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Keywords

  • Alumina catalyst
  • Lean NO
  • NO reduction
  • Reduction

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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