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The ability of Polish coals to release mercury in the proces of thermal treatment
Authors Uruski Łukasz Górecki Jerzy Macherzyński Mariusz Dziok Tadeusz Gołaś Janusz Journal Fuel Processing Technology Year Vol. Number Pages 2015 140 12 12-20 Impact Factor 3.847 DOI Abstract in the main language of the article Keywords in the main language usuwanie rtęci oczyszczanie węgla obróbka cieplna Title in the additional language The ability of Polish coals to release mercury in the proces of thermal treatment Abstract in the additional language Coal combustion for energy production is the main source of mercury emission in Poland and several other
countries. One of the pre-combustion methods to reduce mercury emission is coal cleaning by mild pyrolysis.
Eighteen steamcoals fromthe Upper Silesian Coal Basin in Poland have been used to study the thermal treatment
in a developed system, based on the common MA-2 mercury analyser.
Three groups of mercury compounds, sequentially decomposing during thermal treatment, were defined. The
total mercury removal from the steam coals was in the range from 28% to 97% at 375°C. The significant differences
in the coals' ability to release mercury in the thermal treatment process were demonstrated. The best
coals for thermal cleaning should contain compound with a low decomposing temperature (like HgCl2). There
was no significant correlation found between basic parameters of coals (content of volatile matter, ash, sulphur
and chlorine) and the amount of thermally removed mercury. The obtained data imply the need for careful
selection of coals for the mild pyrolysis process. Keywords in the additional language Mercury removal Coal cleaning Thermal treatment | 
