The impact of calcium sulfate and inert solids accumulation in post-combustion calcium looping systems

► The effects of sulfur and the accumulation of inerts are quantitatively discussed. ► Mass and energy balances were solved together with an updated carbonator model. ► It was found that the main impact on CaL performance is due to the sulfur inlet. ► A minimum purge is required even when an effective reactivating step is carried out.