The isothermal oscillations and fluctuation-driven oscillations of N2O decomposition over Cu-ZSM-5 zeolites

• DOI: 10.1016/j.cplett.2013.08.074
• Publication Date: 2013-08-22T20:49:37Z
• Authors: Fuliang Liu; Yaping Li; Xiaoming Sun
• Keywords: Oscillation (cell signaling); Isothermal process; Intensity

Abstract The oscillations of N 2 O decomposition over Cu-ZSM-5 are investigated by considering the relationship of activation energy and coverage of copper. It is found that the bifurcation point is 146 kJ mol −1 , close to the theoretical calculation barrier and the experimental apparent activation barrier. Then adding a stochastic component to activation energy leads to a broader range of parameters that support oscillation, a form of fluctuation-driven oscillation (FDO). The signal-to-noise ratio of FDO reaches a maximum at the particular noise intensity. The presence of FDO makes the stochastic model show oscillations at a more extended region than the deterministic one.