The role of surface-generated gas-phase methyl radicals in the reduction of NO by CH4 over a Sr/La2O3 catalyst Conference Paper uri icon


  • Methyl radicals have been detected in the gas phase over a Sr/La2O3 catalyst during the reaction of CH4 with NO, provided O2 is present in the system. In the absence of O2 the concentration of CH3· radicals decreases almost to the background level. The results indicate that the enhanced effect of O2 on the reduction of NO by CH4 may be due to surface-generated gas-phase CH3· radicals, but in the absence of O2 another reaction pathway may be dominant. Evidence has been found for the presence of CH3NO, a likely intermediate in the radical reaction, at temperatures up to 800°C.

author list (cited authors)

  • Xie, S. B., Ballinger, T. H., Rosynek, M. P., & Lunsford, J. H.

publication date

  • January 1996