Vanadium-based catalysts supported on ceria were studied for the direct and selective oxidation of H2S to sulfur and water at low temperature. Catalysts with different vanadium loading (2.55-50wt%) were prepared, characterized and tested at temperature of 150-200°C. The most promising catalyst was the sample with the highest Vanadium oxide load (20 wt%) that showed 99% of sulfur selectivity and equilibrium conversion at 150°C. The effect of the components of a typical biogas stream (CH4, CO2 and H20) was studied at 150°C in order to investigate the possible formation of secondary products such COS, CS2. No significant effect was observed in terms of H2S conversion (99%) and selectivity to S02 (<1%) by adding CH4 and CO2 to the feed stream. A slight increase of the S02 selectivity (>1%) was obtained by adding water to the feed stream.
Vanadium-ceria catalysts for H2S abatement from biogas to feed to MCFC
PALMA, Vincenzo
2015-01-01
Abstract
Vanadium-based catalysts supported on ceria were studied for the direct and selective oxidation of H2S to sulfur and water at low temperature. Catalysts with different vanadium loading (2.55-50wt%) were prepared, characterized and tested at temperature of 150-200°C. The most promising catalyst was the sample with the highest Vanadium oxide load (20 wt%) that showed 99% of sulfur selectivity and equilibrium conversion at 150°C. The effect of the components of a typical biogas stream (CH4, CO2 and H20) was studied at 150°C in order to investigate the possible formation of secondary products such COS, CS2. No significant effect was observed in terms of H2S conversion (99%) and selectivity to S02 (<1%) by adding CH4 and CO2 to the feed stream. A slight increase of the S02 selectivity (>1%) was obtained by adding water to the feed stream.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
