Role of hydrogen formation and silver phase for methanol-SCR over silver/alumina

Promoting Ag/Al2O3 Performance in Low-Temperature H2-C3H6-SCR by Thermal Pretreatment of γ-Alumina in Water

“…Toops and co-workers initially proposed that atomic hydrogen may be formed on the surface of a Ag/Al 2 O 3 catalyst under a C 2 H 5 OH-SCR feed via the dissociative adsorption of ethanol [32]. The presence of molecular H 2 has been recently detected in the course of methanol-assisted HC-SCR [33] and methanol-SCR [34,35] reactions. This led these authors [33][34][35] to the proposal that the high SCR performance found at low-temperature in the presence of alcohols was due, at least partly, to a similar effect as that of H 2 in H 2 -HC-SCR [8].…”

“…The presence of molecular H 2 has been recently detected in the course of methanol-assisted HC-SCR [33] and methanol-SCR [34,35] reactions. This led these authors [33][34][35] to the proposal that the high SCR performance found at low-temperature in the presence of alcohols was due, at least partly, to a similar effect as that of H 2 in H 2 -HC-SCR [8]. According to the results of the present study, in which it is proposed that the higher H 2…”