Fickel, Dustin W., Elizabeth D’Addio, Jochen A. Lauterbach, and Raul F. Lobo. 2011. “The Ammonia Selective Catalytic Reduction Activity of Copper-Exchanged Small-Pore Zeolites”. Applied Catalysis B: Environmental 102 (3): 441-48.
Abstract
The NH3-SCR activity of the small-pore zeolites, Cu-SSZ-13, Cu-SSZ-16, and Cu-SAPO-34, is investigated using a high-throughput reactor system. These copper exchanged small-pore zeolites have high SCR activity between 150 and 500°C and are shown to be much more hydrothermally stable than the medium-pore zeolite, Cu-ZSM-5. The degree of copper exchange, the dimensionality of the framework, and heteroatom framework substitution all impact the SCR activity and hydrothermal stability of the materials. Of the small-pore zeolites tested, Cu-SSZ-13 and Cu-SAPO-34 display superior SCR performance, both before and after high-temperature hydrothermal treatment.