CO2 is regarded as one of the greenhouse gases(GHG), which is the main reason of climate change. In order to achieve lower CO2 emissions, several efforts have been conducted worldwide. CO2 capture & storage(CCS) technology development is needed for a coal-fired combustion power plant because of huge CO2 emission. Oxy fuel combustion, one of the CCS technologies has been considered as a primary concern, nowadays. Oxy-fuel combustion needs flue gas recirculation(FGR) for stable operation and enrichment of CO2 concentration in the flue gas. FGR adoption for oxy-fuel combustion requires development of effective desulfurization and dust removal technology. In this study, desulfurization characteristics of lime and dust removal technology have been researched in the laboratory scale coal combustor.