Heavy metals and coal combustion

Conference · Wed Apr 01 04:00:00 EST 1998

OSTI ID:585430

Danihelka, P; Ochodek, T; Noskievic, P; Seidlerova, J ^[1]

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1. VSB - Technical Univ. Ostrava (Czechoslovakia)

Combustion of coal may be an important source of heavy metals pollution. The distribution of heavy metals during combustion process has been studied in six power plants, where fuel, bottom ash, fly ash and emissions have been analysed and the relative concentrations of heavy metals have been estimated. For the most volatile metals (arsenic, antimony, lead, and zinc), the redistribution process involving condensation on surface is probable. Some metals like manganese or chromium are concentrated rather in coarse particles. In such cases, no clear conclusion can be made and probably several mechanisms are involved, including mineral form of metal. Typical results of low chlorine coal (0.01-0.03% Cl) exhibit increasing concentration of volatile metals in the magnitude of around one order when going from bottom ash to emissions. Different results have been found in similar operation conditions in the case of high content of chlorine in coal (0.3 % of Cl in coal). In this case, the concentration of metals in emissions is significantly higher and also nickel, copper and manganese concentrations increase. It seems to be probable that chlorine in the coal increases the redistribution of metals by volatile chlorides formation.

• Research Organization: Coal and Slurry Technology Association, Washington, DC (United States)
• OSTI ID: 585430
• Report Number(s): CONF-980309--PROC.
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
AIR POLLUTION
AIR POLLUTION CONTROL
CHLORINE
COAL
COMBUSTION
FLY ASH
METALS