The combustion of coal for energy had created severe environmental issues mainly due to the release of particulate matter and flue gases containing sulphur dioxide (SO2) during the processing. At present limestone based adsorbent is used to desulphurize flue gas. Egg shell is a type of food waste and it contains high amount of calcium carbonate which is similar to limestone. In this study, the potential of egg shell as a substitute material to replace commercial limestone based calcium oxide

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... investigated. Waste egg shell and commercial calcium carbonate (limestone)(CCC) were calcined at various temperatures (750 -950 ºC) and holding time (2 and 4 hours). The calcined samples were tested for SO2 adsorption using a gas reactor at room temperature with a flow rate of 300 mL/min. The initial concentration of SO2 is 200 ppm. Characterization of the adsorbents will be done using Fourier Transform Infrared (FTIR), Brunauer-Emmett-Teller (BET) and X-ray Diffraction (XRD) to understand the sorption behavior. Calcined egg shell and calcined CCC takes about 110 min and 180 min for saturation. It is noted that calcined egg shell could remove SO2 alike calcined CCC. However, the adsorption capacity of egg shell is lower compared to CCC and this could be due to impurities.