Influence of homogeneous decane oxidation on the catalytic performance of lean NOx catalysts

C. C. Cheung*, M. C. Kung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Extensive homogeneous gas-phase reactions were observed when decane was used as the hydrocarbon reductant for the selective reduction of NOx. The catalytic performance of a SnO2/CoOx/Al2O3 catalyst was found to be strongly dependent on the extent of the homogeneous reaction in the pre-catalytic volume. The effect of the homogeneous reaction on the catalytic performance also depended on whether SO2 was present in the feed. By filling the pre-catalytic volume with 25-35 mesh irregularly shaped quartz chips, gas-phase reaction was suppressed significantly. This methodology was used to evaluate the inherent catalytic performance of SnO2/CoOx/Al2O3 and SnO2/Al2O3 catalysts with decane as a reductant. It was found that in the absence of SO2, SnO2/Al2O3 was a better catalyst than SnO2//CoOx/Al2O3, but in the presence of 30 ppm of SO2 the latter was a far better catalyst.

Original languageEnglish (US)
Pages (from-to)131-138
Number of pages8
JournalCatalysis Letters
Volume61
Issue number3-4
DOIs
StatePublished - Sep 1999

Keywords

  • Decane
  • Homogeneous reaction
  • Selective NO reduction
  • SnO/AlO
  • SnO/CoO/AlO

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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