Influence of the water vapor on the activity of CuO/SBA-15 SOx adsorbents

Both the performance and regenerability of SO2 adsorbents made CuO supported on SBA-15 ordered mesoporous silica were studied for a cyclic DeSOx process under wet dry conditions. H2O vapor decreases 16 wt% loading CuO/SBA-15 (16CuO/SBA-15) adsorbent along adsorption/regeneration cycles performed at 400 °C. Indeed, breakthrough adsorption capacity this after ten adsorption- regeneration conditions (5 vol% H2O) 61% compared to obtained The impact temperature as well sorbents also investigated XRD, TEM/EDX, N2 physisorption characterizations last cycle correlate structural textural properties therefore copper species, with adsorbents. Increasing up 450 °C or without water increases 16CuO/SBA-15 higher than water. In presence vapor, 8CuO/SBA-15 presents highest average loss around 71% when expressed in mgSO2/gCuO, ones 26CuO/SBA-15 increase 26 wt%, shows that contribution surface active phase highlighted by desorption curves, significantly Moreover, water, total capacities tenth are observed lowest (8 CuO: 547 495 mgSO2/gCuO H2O, respectively). These could be explained better dispersion support, which makes species more reactive especially H2O.