Global Kinetic SCR Model with Two Ammonia Storage Sites

Mark  Stewart, PNNL

ORAL PRESENTATION: The global kinetic model developed at PNNL for current Cu-CHA substrates has been extended to include two ammonia storage sites for better description of TPD behavior of fresh and hydrothermally aged samples. Data collected at ORNL using the CLEERS transient SCR laboratory evaluation protocol was used to extend the two-site storage model to other reactions relevant to SCR operation. The ultimate goal is a consistent model that describes changes in SCR performance that may occur over the useful life of a deployed SCR system.

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