XFTIR- Studies on Adsorption and Decomposition of NO on in-situ Synthesized ZSM-5/Cordierite Catalysts

摘要

The adsorption of NO on in-situ synthesized CuZSM-5/cordierite monolithic catalysts ofdifferent Si/Al ratios was studied by diffuse reflectance FTIR spectroscopy at different NOpartial pressures from 500 ppm to 2000 ppm and temperatures from 298 K to 773 K. At roomtemperature, the Cu exists mostly in oxidized Cu2+ form. A lot of N2O species were observedon the surface even at room temperature. A band at 2133 cm-1 is attributed to NO+-Olattice andonly related to the number of lattice Al in the zeolite. There my exist a copper-zeolitesubstrateinteraction on such as synthesized monolithic catalysts.