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

Abstract : The present work highlights for the first time that a thermal treatment of γ-Al2O3 in water at 80 °C for 24 h prior to Ag deposition (Ag/Al2O3-OH) leads to a drastic enhancement of H2-C3H6-SCR performance at low temperature. This enhancement is attributed to the higher NOx coverage on Ag/Al2O3-OH compared with that of Ag/Al2O3. The higher NOx adsorption capacity of the sample prepared from the γ-Al2O3 thermally-treated in water is proposed to result from the preferential interaction of Ag with newly-created Al2O3 anchoring sites (Al(OH)3 bayerite domains), which were not available on the untreated pristine support.
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Submitted on : Monday, October 31, 2016 - 2:15:51 PM
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Tesnim Chaieb, Laurent Delannoy, Catherine Louis, Cyril Thomas. Promoting Ag/Al2O3 Performance in Low-Temperature H2-C3H6-SCR by Thermal Pretreatment of γ-Alumina in Water. Catalysis Letters, Springer Verlag, 2016, pp.1-8. ⟨10.1007/s10562-016-1864-9⟩. ⟨hal-01390045⟩

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