Honeycomb V2O5/CeO2 structured catalysts were prepared for the H2S abatement from biogas by direct selective catalytic oxidation to sulphur and water at low temperature.
Two commercial CeO2-based washcoats (Ecocat, Mel Chemicals) and a CeO2-based washcoat prepared in laboratory, used as a support for the active phase deposition, were deposited on a honeycomb monolith made of cordierite by dip coating procedure; after washcoat deposition and stabilization, the active phase (V2O5) was deposited by wet impregnation.
The washcoats were characterized by X-Ray Diffraction, X-Ray Fluorescence (ED-XRF). The adhesion of the different washcoats on cordierite was investigated by ultrasonic vibration, by studying also the effect of the addition of the alumina binder on the catalyst properties.
Different washcoats uncatalysed and catalysed with 2 wt% of V2O5 were tested in catalytic activity test at 200°C in order to compare the catalytic performance in terms of H2S abatement efficiency and resistance to the deactivation.