Probing the effect of the Si/Al ratio in Cu-CHA zeolite catalysts on SO<sub>2</sub> exposure: <i>in situ</i> DR UV-vis spectroscopy and deactivation measurements
Reza K. Abasabadi, Ton V. W. Janssens, Silvia Bordiga, Gloria Berlier
Abstract
UV-vis shows the effect of SO 2 on [CuII2(NH 3 ) 4 O 2 ] 2+ complexes in Cu-CHA catalysts with different Si/Al ratios. The amount of [CuII2(NH 3 ) 4 O 2 ] 2+ correlates with the activity in NH 3 -SCR and sulfur uptake, but not with deactivation.
Topics & Concepts
CatalysisZeoliteIn situChemistrySulfurSpectroscopyUltraviolet visible spectroscopyInorganic chemistryNuclear chemistryAnalytical Chemistry (journal)Organic chemistryQuantum mechanicsPhysicsCatalytic Processes in Materials ScienceGas Sensing Nanomaterials and SensorsAdvanced Photocatalysis Techniques