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Fluidized bed combustion (FBC) has the considerable advantage of being capable of burning high-sulphur fuels while achieving in situ sulphur capture by means of limestone addition. Unfortunately the efficiency of this process is limited, and limestone utilization in the range of 30–45% is not uncommon. In consequence, improving limestone utilization has long been an aim of FBC research. The principal...
The hydration behaviour of sixteen ashes, obtained from different commercial-scale fluidized bed combustors, has been investigated. Hydration is important for both ash disposal and reactivation of excess lime present in the ashes for further use in flue gas desulphurization. The techniques used were instrumental and conventional chemical analysis, thermogravimetry and X-ray diffraction. The ashes...
The high CaO content of FBC ashes causes difficulties with their management. The use of CO 2 to recarbonate or pacify the ashes was suggested in order to increase the concentration of CaCO 3 in the ashes and decrease the amount of free lime. Work was performed using a Cahn 1100 pressurized TGA on coal and petroleum coke FBC residues at 0.1 and 1.1MPa. Both hydrated and nonhydrated...
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