Sulfur dioxide removal with coal scrubbing

This thesis is based on an effective removal of sulfur dioxide from flue gas with coal as the scrubbing medium instead of lime, which is used in the conventional FGD (flue Gas Desulfurization) processes. A laboratory study proves that coal scrubbing is an innovative technology that can be implemented into a commercial process in place of the conventional lime scrubbing flue gas desulfurization process. It was found that SO2 removal was highly temperature sensitive, giving 13.1% recovery at 21°C and 99.2% recovery at 73°C after 4 hours. The removal Of SO2 was accomplished by the catalysis of iron that was produced by leaching of coal pyrite with combination of SO2 and O2. This leaching reaction was found to be controlled by chemical reaction with apparent activation energy of 11.6 kcal/mole. SO2 removal increased with increasing O 2 concentration up to 10% and leveled off upon further increase. The effect of SO2 concentration on its removal was minimal.