Sulphur trap materials based on mesoporous Al2O3

Tests performed over four temperature cycles show that the removal efficiency for SO2 gradually decreases over the course of temperature cycles. Moreover, a progressive diminution of the SO2 uptake is observed especially in the lower temperature range during the temperature cycles. A further modification with Na prevents this drawback. Especially a distinct improvement is observed with the Ca-containing material. It stored 22 wt.% sulphate during the four temperature cycles. This material is regarded as being most suitable for application as sulphur trap material.