Effects of Physicochemical/Mineralogical Characteristics of Limestones and Porosity after Calcination on Desulfurization Reactivities

백철승, 서준형, 조진상, 조계홍, 한춘

Characteristics of wet flue gas desulfurization and in-furnace desulfurization of domestic and overseas limestone with different crystallinity and crystalline size are studied in this article. Properties of desulfurization were evaluated in relation to physico-chemical/ mineralogical characteristics, degree of pore formation for different calcination temperatures and TNC(total neutraliz-ing capability). TNC of domestic high crystalline limestone was lower than that of overseas one. On the other hand, the porosity after calcination was shown to be relatively high for domestic limestone, which had high initial rates of desulfurization reactions in-furnace. Based on low pore formation and porosity with high TNC of crystalline high-Ca limestones compared to macrocrystal-line ones, the former  are  preferred for wet desulfurization processes. 

Key words : Limestone, Desulfurization, Calcination, Porosity, Total neutralizing capability