The decomposition of N2O over a 4.56% Cu/ZSM-5 catalyst (ZSM-5 is a zeolite discovered by Socony Mobil, hence the letter designation) has been investigated by Dandekar and Vannice [56]. Temperatures were varied from 623 to 673 K and partial pressure dependencies were determined for N2O, O2 and N2 at three different temperatures under approximately differential reaction conditions. The rate data are given in Table 1. The N2