Catalysis Letters

, Volume 130, Issue 3–4, pp 637–641 | Cite as

Optimization of Multicomponent Cobalt Spinel Catalyst for N2O Abatement from Nitric Acid Plant Tail Gases: Laboratory and Pilot Plant Studies

  • Pawel Stelmachowski
  • Filip Zasada
  • Gabriela Maniak
  • Pascal Granger
  • Marek Inger
  • Marcin Wilk
  • Andrzej Kotarba
  • Zbigniew Sojka
Article

Abstract

The influence of Zn and K promoters on N2O decomposition over Co3O4 was investigated by work function measurement and temperature-programmed surface reaction. The beneficial effect of the promoters resulting in spectacular decrease in the temperature of 50% conversion by 200 °C was found to be essentially of electronic origin. The strong correlation between the catalyst work function and deN2O activity allowed for the optimization of the doping level of both additives. The pilot plant tests in real nitric acid tail gases revealed that the optimized double promoted (Zn, K) cobalt spinel catalyst maintained its remarkable activity in N2O decomposition (conversion >95% at the target temperature of 350 °C) for more than 60 h.

Keywords

Cobalt spinel Potassium promoter N2O decomposition Work function Zinc Tail gases 

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Pawel Stelmachowski
    • 1
  • Filip Zasada
    • 1
  • Gabriela Maniak
    • 1
  • Pascal Granger
    • 2
  • Marek Inger
    • 3
  • Marcin Wilk
    • 3
  • Andrzej Kotarba
    • 1
  • Zbigniew Sojka
    • 1
  1. 1.Faculty of ChemistryJagiellonian UniversityKrakowPoland
  2. 2.Unité de Catalyse et Chimie du Solide UMR 8181Université des Sciences et Technologies de LilleVilleneuve d’Ascq CedexFrance
  3. 3.Instytut Nawozow SztucznychPulawyPoland

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