Copper Exchanged Nanotitanate for High Temperature H2S Adsorption

The H 2 S breakthrough capacity of copper-exchanged Engelhard Titanosilicate-2 (ETS-2) was measured at temperatures up to 950 °C and it was found that the adsorbent efficiency remains unchanged across the entire temperature range. Below 750 °C, the adsorption capacity at breakthrough is 0.7 mol of H 2 S per mole of copper while above 750 °C the capacity of the adsorbent is halved. The change in H 2 S capacity is due to Cu 2+ reduction by the H 2 which is formed through the thermal dissociation of H 2 S. The adsorbent shows good potential for use over a wide range of operating temperatures in H 2 S scrubbing processes.