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- W2018781793 abstract "• Catalytic activity of Cu-SSZ-13 is obviously inhibited by C 3 H 6 in the whole temperature ranges. • Competitive adsorption between NO x and C 3 H 6 is the main factor for Cu-SSZ-13 deactivation in low temperature ranges. • Coke depositions contribute for Cu-SSZ-13 deactivation around 350 °C. • Cu-SSZ-13 catalysts can be regenerated above 450 °C in rich oxygen. Application of Cu-exchanged chabazite catalysts for Urea-SCR of NO x in diesel engines is limited to some extent by catalyst deactivation with hydrocarbons (HCs). In this work, catalytic activity of commercial Cu-SSZ-13 catalysts with or without propene for selective catalytic reduction of NO x with ammonia (NH 3 -SCR) was tested, and results showed that the DeNO x activity was obviously inhibited in the whole temperatures, especially in medium temperatures. Furthermore, BET, NH 3 -TPD, NO x -TPD, and in situ DRIFTS were employed to elaborate the propene poisoning effects on Cu-SSZ-13 catalysts. In the low temperature ranges, the competitive adsorption process between NO x and C 3 H 6 contributed to the deactivation of Cu-SSZ-13 catalysts. The presence of propene would inhibit the NO x adsorption and activation on the catalyst surface. In the medium temperature ranges, coke depositions were very critical for the deactivation of Cu-SSZ-13 catalysts. The active copper sites would be covered by the coke depositions, while the chabazite zeolite pores were also blocked by coke depositions. At higher temperatures above 450 °C, coke could be quickly removed and the catalysts could be regenerated in the presence of rich oxygen." @default.
- W2018781793 created "2016-06-24" @default.
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- W2018781793 date "2015-05-01" @default.
- W2018781793 modified "2023-09-25" @default.
- W2018781793 title "Mechanism of propene poisoning on Cu-SSZ-13 catalysts for SCR of NOx with NH3" @default.
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- W2018781793 doi "https://doi.org/10.1016/j.cattod.2014.05.027" @default.
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