Study On NO Catalytic Activity Of Selective Catalytic Reduction By CuMn-ZSM-5 Catalysts

Firstly, some Cu-ZSM-5 and Mn-ZSM-5 were prepared by the ZSM-5 loaded CuO and MnO, and according to the demand of the experiment, the blank ZSM-5 were also prepared. In the following experiment their activity were studyed and compared.In order to study the degree of the impact on purifying NO by the following four important factors, the L9(34) experiment was designed. The experiment results showed that the most important factor in the catalysing experiment was the temperature; it was followed by the RO loaded quantity, and then was the oxygen’s bulk percent in the mixed gaseous and the mixed gaseous airspeed. And at the same time what we also could find from the experiment were that the factors’level that we should setted were that the oxygen’s bulk percent in the mixed gaseous was 10% and the mixed gaseous airspeed was 5000 h-, because there were so many possibility in the experiment about the RO loaded quantity and the temperature that we couldn’t give the factors level before more experiments were done.According to the results of the L9(34) experiment, we mixed the gas by the following bulk percent ratio that the NO%=0.1% and the NH3%=0.11% and the O2%=10% and the others was N2, and the mixed gaseous airspeed was 5000 h-, and the catalyzer’s loaded quantity normally was 0.5000 g, and the temperature range was 200~500℃. In these environments the activity experiments on purifying NO by the blank ZSM-5 catalyzer and the Cu-ZSM-5 catalyzers and the Mn-ZSM-5 catalyzers and the CuMn- ZSM-5 catalyzers were carryed out. And then the catalyzers’activity and stability were compared transversely and lengthways. The experiments results showed that 2: 1 CuMn-ZSM-5 were the best catalyzers of all.At last, the BET and XRD and SEM experiments were carryed out to estimate the selected catalyzers’physical and chemical characters. And the results of physical and chemical character experiments not only testifyed the results of the compared experiments but also provided theoretic base of the catalyzers’improvement.