Abstract
Here we present the results of a synchrotron-based in situ, time-resolved PXRD study during activation of two Cu-SSZ-13 catalysts under O2/He and one during standard NH3-SCR reaction conditions to obtain insight into the behaviour of Cu ions. The results obtained indicate that deNOx activity is inexorably linked with occupancy of the zeolite 6r.
Highlights
We present the results of a synchrotron-based in situ, timeresolved PXRD study during activation of two Cu-SSZ-13 catalysts under O2/He and one during standard NH3-SCR reaction conditions to obtain insight into the behaviour of Cu ions
In recent times it has been shown that small-pore zeolites such as Cu-exchanged SSZ-13 (Cu-SSZ-13) and SAPO-34 exhibit the required high activity at low temperatures and enhanced hydrothermal stability compared to other medium-pore zeolite topologies, leading to a successful commercialisation.[1,2]
We show, using in situ PXRD, how the population of Cu in the 6r at low temperatures (T o 300 1C) can be correlated with improved catalytic activity
Summary
Correlation between Cu ion migration behaviour and deNOx activity in Cu-SSZ-13 for the standard NH3-SCR reaction†
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