Gas-phase Mercury Removal by Carbon-based Sorbents

摘要

Present condition of mercury emission in Korea was investigated. Gas-phase mercury emission is not regulated inKorea. The current regulation limit 5mg/m3 seems to be nominal. However, the government will regulate emission ofgas-phase mercury from 2005. The regulation will be applied first to incinerators rather than to power plants. Todevelop carbon-based sorbents to be used in gas-phase mercury removal, the performance of virgin activated carbons(AC) and with that of sulfur-impregnated activated carbons was compared. Virgin AC with increased oxygenfunctional groups and large pore diameter was superior in mercury adsorption performance. The adsorptionperformance of sulfur-impregnated AC depended on the pore characteristics of virgin AC used as raw material and thetypes of sulfur, rather than on the amount of sulfur impregnated. Method of reactive sulfur impregnation has beendeveloped. With the method, the utilization efficiency of sulfur to mercury adsorption was maximized