Cerium modified copper-based mordenite zeolite catalyst for high-temperature selective catalytic reduction NO with NH3 of gas turbines

A Cu-doped mordenite zeolite modified cerium catalyst (Ce–Cu/MOR) was tested as a potential catalyst of high temperature selective catalytic reduction NO with NH3 (NH3-SCR) of gas turbines. Ce–Cu/MOR catalyst has superior catalytic performance (more than 90% NOx conversion) from 500 to 620 °C, when V2O5-WO3/TiO2 catalyst is completely deactivated. The addition of Ce inhibits the NH3 oxidation side reaction. A series of physical and chemical characterization (XRD, BET, NH3-TPD, XPS, SEM, H2-TPR, and Py-IR) were applied to analyze the catalysts and the heat-shocked samples. The obtained results illustrated that the larger specific surface area, more chemisorbed oxygen, and abundant Brønsted acid sites were generated by the introduction of Ce. The superior catalytic performance of Ce–Cu/MOR could attribute to these comprehensive effects. This result has a guiding significance for the development of high-temperature catalysts for gas turbines.