Decomposition of NO and N2O on Cu-AlTS-1: oscillatory behaviour at full N2O conversion

Cu-AlTS-1 catalyst was prepared by solid state ion exchange and studied in the NO and N2O decomposition. Oscillation was observed in a wide range of experimental conditions during the decomposition of N2O. At full N2O conversion, oscillations were observed only in the O2 and NO concentrations the latter being out of phase with respect to O2 and being originated from the decomposition of an excess oxygen containing nitrito–nitrato-like surface complex. Traces of NO extinguished the oscillations and increased the N2O conversion if it was below 100%. The NO also plays a key role in the feed back and synchronisation.