Mercury emissions and partitioning from Indian coal-fired power plants

查看全文 作　　者：Hridesh [1]Agarwalla;Rabi Narayan [1]Senapati;Tarit Baran [1]Das

机构地区：[1]Coal Minerals&Heauy Metal Research Group,CSIR-Central Institute of Mining and Furl Research,Dhcmbad-82810,India

出　　处：《Journal of Environmental Sciences》索引2021年第33卷第2期,共6页

摘　　要：In India coal combustion is the single largest source of emission of mercury which is a widespread persistent global toxicant,travelling across international borders through air and water.As a party to the Minamata convention,India aims to monitor and reduce Hg emissions and stricter norms are introduced for mercury emissions from power plants(30μg/Nm 3 for flue gas in stack).This paper presents the results obtained during the experimental studies performed on mercury emissions at four coal-fired and one lignite-fired power plants in India.The mercury concentration in the feed coal varied between 0.12-0.27 mg/Kg.In the mercury mass balance,significant proportion of feed coal mercury has been found to be associated with fly ash,whereas bottom ash contained very low mercury.80%-90%of mercury was released to air through stack gas.However,for circulating fluidised bed boiler burning lignite,about 64.8%of feed mercury was found to get captured in the fly ash and only 32.4%was released to air.The mercury emission factor was found to lie in the range of 4.7-15.7 mg/GJ. 关键词：Coal combustion EMISSION MERCURY Flue gas Thermal power plant

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Mercury emissions and partitioning from Indian coal-fired power plants

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