Preparation of ZrO₂/γ-Al₂O₃ albumen type catalyst and its catalytic performance for carbonyl sulfide hydrolysis

In order to realize the efficient removal of COS from blast furnace gas, a ZrO₂/γ-Al₂O₃ albumen type catalyst with low energy consumption and high hydrolysis efficiency using γ-Al₂O₃ as the carrier and zirconium nitrate as the active component was prepared in this study. The results showed that when the loading of zirconium nitrate was 6% and the calcination temperature was 550 °C, the prepared ZrO₂/γ-Al₂O₃ albumen hydrolysis catalyst had the best hydrolysis catalytic effect on COS. The removal rate of COS could reach up to 96.95%, and the overflow rate of H₂S was maintained at 72.0% after 80 min of reaction. Compared with the single carrier γ-Al₂O₃, the loading of active component ZrO₂ can avoid the adsorption of H₂S on the catalyst to block the pore structure of the catalyst, and it can improve the hydrolysis conversion of COS and the overflow rate of H₂S, so that the catalyst maintains high catalytic activity.