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Chemical deactivation of Ag/Al 2 O 3 catalysts due to aromatic species and sulfur present in the diesel fuel is a major challenge in hydrocarbon-based selective catalytic reduction (HC-SCR) of NO x from diesel engine exhaust. In this paper, mechanisms for catalyst deactivation due to both aromatic species and sulfur are investigated using model hydrocarbon species, such as...
A mechanistic study of the H 2 -assisted Selective Catalytic Reduction (SCR) of NOx with octane as reductant over a Ag/Al 2 O 3 catalyst was carried out using a modified DRIFTS cell coupled to a mass spectrometer. Using fast transient cycling switching of H 2 , with a time resolution of a few seconds, it was possible to differentiate potential reaction intermediates...
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