Journal
CHEMOSPHERE
Volume 252, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2020.126489
Keywords
Ferroferric oxide; Coal-burning additive; Polycyclic aromatic hydrocarbons; Coal combustion; Flue gas
Categories
Funding
- General Project of Beijing Educational Committee [KM202010011002]
- National Natural Science Foundation of China [51776227]
- National Key R&D Program of China [2016YFC0206001]
- Key Research and Development Program of Hunan Province [2018SK2037]
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Household coal combustion is identified to be the second largest emission source of polycyclic aromatic hydrocarbons (PAHs) in China. In this study, ferroferric oxide (Fe3O4) was used as a coal burning additive to reduce PAHs emission from coal combustion in a household coal stove. The results showed that Fe3O4 participated in the coal combustion process. The addition of Fe3O4 reduced the release of PAHs during the coal combustion process, and could improve the residence capacity of ash residue to these PAHs. Toxic equivalent quantity (TEQ) of PAHs in flue gas from combustion of coal mixed with Fe3O4 was less than that from the raw coal combustion. For a typical combustion temperature of 850 degrees C, the TEQ of PAHs for the mixture of coal and 2.0 wt% Fe3O4 decreased 21.98% compared to that for the raw coal. The abundant active surface oxygen species originated from the phase transformation of iron oxides probably accelerated the cracking of PAHs, and hence led to the reduction of PAH emissions and their TEQ. The study could help to develop new technology for reduction of PAHs emission from household coal combustion. (C) 2020 Elsevier Ltd. All rights reserved.
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