A Cu-SAPO catalyst for NH3-SCR applications showed a significant loss of deNOx performance after exposure to oxygen-free conditions. The present work aims at elucidating the causes of the observed progressive deactivation by comparing different experimental procedures for the SCR activity tests. The adoption of an experimental protocol, which avoids the exposure to a non-oxidizing environment, ensured a stable activity of the Cu-SAPO catalyst. Moreover, treatment of the deactivated catalyst with an oxidizing mixture at 550 °C for 5 h enabled to partially recover the deNOx activity.

The deactivation of an NH3-SCR Cu-SAPO catalyst upon exposure to non-oxidizing conditions

Villamaina R.;Nova I.;Tronconi E.;
2019-01-01

Abstract

A Cu-SAPO catalyst for NH3-SCR applications showed a significant loss of deNOx performance after exposure to oxygen-free conditions. The present work aims at elucidating the causes of the observed progressive deactivation by comparing different experimental procedures for the SCR activity tests. The adoption of an experimental protocol, which avoids the exposure to a non-oxidizing environment, ensured a stable activity of the Cu-SAPO catalyst. Moreover, treatment of the deactivated catalyst with an oxidizing mixture at 550 °C for 5 h enabled to partially recover the deNOx activity.
2019
Cu-SAPO; Deactivation; NH; 3; -SCR; Oxygen-free conditions
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1122954
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