Abstract

A Monte Carlo (MC) random walk algorithm is employed to investigate the kinetics of N 2O catalytic decomposition over three-dimensional fractals. The simulation results show that usual kinetic equations based on the mean field theory are not applicable to the reaction over fractals, and a different rate law containing a fractional reaction order is more suitable for describing the reaction kinetics over fractals. For the annihilation reaction involved in N 2O decomposition over fractals, the effective reaction order is found to range from 2 to 1+2/ d s depending on the annihilation constant, where d s is the fracton dimension.

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