Abstract
The porosity, BET surface area and desulfurization reactivity of samples of CaO obtained by calcination of Ca(OH) 2 at 1000°C in a gaseous atmosphere containing different amounts of SO 2 are reported. Small amounts of SO 2 (∼50 ppm) increase the surface area and porosity of the CaO relative to those obtained without SO 2. The desulfurization reactivity of CaO produced in SO 2-containing gas is also greater: higher conversion to CaSO 4 is obtained with this CaO in simulated fuel gas desulfurization. This behaviour may be related to the change in structural characteristics produced by small quantities of CaSO 4 formed during calcination which reduce the overall sintering of the calcium oxide.
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