Catalysis Letters

, Volume 25, Issue 3–4, pp 393–400 | Cite as

Adsorption properties of oxygen and methane on Ga-ZSM-5; the origin of the selectivity of NOx reduction using methane

  • Takeshi Tabata
  • Mikako Kokitsu
  • Osamu Okada
Article

Abstract

The adsorption properties of oxygen and methane on Ga-ZSM-5 and Cu-ZSM-5 catalysts were examined by a TPD method to clarify the extraordinary selectivity of HC-SCR using methane on Ga-ZSM-5. It was observed that Ga-ZSM-5 did not adsorb oxygen but adsorbed methane dissociatively, while on Cu-ZSM-5 oxygen was dissociatively adsorbed and reacted with adsorbed ethylene.

Keywords

methane ethylene dissociative adsorption gallium copper NOx selective reduction zeolite ZSM-5 TPD 

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Copyright information

© J.C. Baltzer AG, Science Publishers 1994

Authors and Affiliations

  • Takeshi Tabata
    • 1
  • Mikako Kokitsu
    • 1
  • Osamu Okada
    • 1
  1. 1.Fundamental Research LaboratoriesOsaka Gas Co. Ltd.OsakaJapan

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