H2O2 Leaching 공정을 이용한 저 유황탄의 연소 전 탈황

Abstract

This research aimed to elucidate desulfurization characteristics of low sulfur coals (two imported bituminous coals and two domestic anthracite coals) before combustion and to optimize desulfurization conditions in a leaching process using hydrogen peroxide. The optimum condition for the leaching process was obtained when the experiments were carried out for 60 minutes at 90 oC using 20% H2O2. The sulfur removal efficiency for the anthracite and bituminous coals were 55-80% and 58-67%, respectively. The effect of particle size on desulfurization efficiencies was negligible within experimental error. Heating values of treated bituminous coals slightly decreased, while those for anthracite coals slightly increased. The ash removal efficiency for bituminous and anthracite coals were 11-22% and 9- 26%, respectively. It is thought that some of chars processed by leaching process would meet the current SO2 emission standard without flue gas desulfurization process.