Studies on synthesis and activity for selective catalytic reduction of NO over Pt supported MCM-48

In this study, in order to overcome drawbacks in the zeolite catalytic system for selective catalytic reduction of NOx, platinum metal was dipped in MCM-48. To confirm MCM-48 structure, various characterization methods such as XRD, B.E.T. surface areas, and XPS were carried out. Additionally simulated flue gases mixing and activity test were performed. Similar to specific charactertics of alumina supported platinum metal catalyst, NO reduction activity was improved in low temperature range under 300degreesC on Al-MCM-48, and more improved activity was obtained when platinum was dipped over aluminum substituted MCM-48 than silica type MCM-48. 10wt% water vapor injected on Pt/Al-MCM-48catalyst, and it was found that the NO reduction activity was not interfered by water vapor contents. When compared with the activity performance of Pt-ZSM-5, still Pt/Al-MCM-48 has superior resistance to water vapor and sulfur contents in flue-gases than Pt-ZSM-5.