Journal
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
Volume 133, Issue -, Pages 18-31Publisher
ELSEVIER
DOI: 10.1016/j.psep.2019.10.033
Keywords
Coal combustion; Heavy metals; Fly ash; Electrostatic precipitation; Fly ash composition; Environmental risk assessment; Environmental impacts of energy technology
Categories
Funding
- National Centre for Research and Development (NCBiR) of Poland [POIR.04.01.04-00-0096/17]
- HYBRID system for emission reduction of the acidic compounds and fly ash from flue gases
- HYBRYDA + [1/4.1.4/2017/POIR]
- European Union through the European Regional Development Fund within the Operational Programme Smart Growth
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The paper presents experimental studies of heavy metals partitioning in fly ash particles after combustion of various types of coal (lignite, sub-bituminous, bituminous, and anthracite) between different fields of electrostatic precipitator. The concentration of the following heavy metals has been measured: Ba, Sr, Zn, Cu, Ni, Cr, As, Co, Pb. The results show that the concentration of heavy metals is higher in small particles (<1 mu m) than in larger ones that correlates with consecutive fields of electrostatic precipitator. This relation is independent of the type of combusted coal, although differences in the values of concentrations of individual elements exist. Better knowledge on heavy metal partitioning in the combustion-precipitation system is needed for the development of emission control devices of higher efficiency, such as electrostatic agglomerators or hybrid filters, particularly for PM1 particles. The results of these investigations can also be helpful in the designing of novel physical and chemical processes for recovery selected trace elements from fly ash, for their further utilization. (C) 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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