title: Natural desulfurization in coal-fired units using Greek lignite.
abstract: This paper analyzes the natural desulfurization process taking place in coal-fired units using Greek lignite. The dry scrubbing capability of Greek lignite appears to be extremely high under special conditions, which can make it possible for the units to operate within the legislative limits of sulfur dioxide (SO2) emissions. According to this study on several lignite-fired power stations in northern Greece, it was found that sulfur oxide emissions depend on coal rank, sulfur content, and calorific value. On the other hand, SO2 emission is inversely proportional to the parameter gammaCO2(max), which is equal to the maximum carbon dioxide (CO2) content by volume of dry flue gas under stoichiometric combustion. The desulfurization efficiency is positively correlated to the molar ratio of decomposed calcium carbonate to sulfur and negatively correlated to the free calcium oxide content of fly ash.
authors.affiliation: Thermal Power Plants Operations Department, Public Power Corporation of Greece, Athens, Greece. konidaris@ieee.org
authors.forename: Dimitrios N
authors.initials: DN
authors.lastname: Konidaris
mesh_terms: D000397:Air Pollution / Q000517:prevention & control*; D017610:Calcium Compounds / Q000737:chemistry; D002244:Carbon / Q000032:analysis; D003031:Coal / Q000032:analysis*; D060729:Coal Ash; D006115:Greece; D010087:Oxides / Q000737:chemistry; D052638:Particulate Matter / Q000032:analysis; D011210:Power Plants; D013457:Sulfur Compounds / Q000737:chemistry*; D013458:Sulfur Dioxide / Q000737:chemistry
chemical_list: D017610:Calcium Compounds; D003031:Coal; D060729:Coal Ash; D010087:Oxides; D052638:Particulate Matter; D013457:Sulfur Compounds; D013458:Sulfur Dioxide; C405951:sulfur monoxide; D002244:Carbon; C016538:lime