Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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CO2 sequestration and heavy metal stabilization by carbonation process in bottom ash samples from coal power plant

  • Ramakrishna., CH (Hanil Cement) ;
  • Thriveni., T (Hanil Cement) ;
  • Nam, Seong Young (Technical Center, HANIL CEMENT Co.Ltd) ;
  • kim, Chunsik (Technical Center, HANIL CEMENT Co.Ltd) ;
  • Ahn, Ji Whan (Mineral Processing Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
  • Received : 2017.11.20
  • Accepted : 2017.12.13
  • Published : 2017.12.31
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Abstract

Coal-fired power plants supply roughly 50 percent of the nation's electricity but produce a disproportionate share of electric utility-related air pollution. Coal combustion technology can facilitate volume reduction of up to 90%, with the inorganic contaminants being captured in furnace bottom ash and fly ash residues. These disposal coal ash residues are however governed by the potential release of constituent contaminants into the environment. Accelerated carbonation process has been shown to have a potential for improving the chemical stability and leaching behavior of bottom ash residues. The aim of this work was to quantify the volume of $CO_2$ that could be sequestrated with a view to reducing greenhouse gas emissions and stabilize the contaminated heavy metals from bottom ash samples. In this study, we used PC boiler bottom ash, Kanvera reactor (KR) slag and calcined waste lime for measuring chemical analysis and heavy metals leaching tests were performed and also the formation of calcite resulting from accelerated carbonation process was investigated by thermo gravimetric and differential thermal analysis (TG/DTA).

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