Abstract
The objective of this study is to investigate the catalytic performance of Cu-zeolite catalysts supported on various types of zeolites (chabazite, MFI, and BEA) for selective catalytic reduction with C3H6. 2Cu/ZSM-5 exhibited a nearly 70% de-NOx performance at 360°C, Cu/SSZ-13 and Cu/BETA exhibited less than 60%. The loading of Cu also exhibited different de-NOx performances, which were related to the chemical states of Cu. The isolated Cu2+ ion was favorable to the NOx reduction compared to the bulk CuOx species. The effects of O2, CO2 concentrations and hydrothermal aging were investigated for the 2Cu/ZSM-5 catalyst.
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