A desulfurizer comprising Ca2Fe2O5 as active the component and a process of making the same are disclosed. The process comprises the following steps: a) mixing the powder comprising iron oxide and/or hydroxide and/or nitrate with the powder comprising calcium oxide and/or carbonate and/or bicarbonate, where the molar ratio of iron/calcium is between 1:1 to 1:5; b) shaping the mixture obtained in step, a) then drying; and c) sintering the article obtained in step b) under oxidative atmosphere at a temperature 700 to 1100 DEG C for 0.5 to 24 hours.
