Trace Elements in Chinese Coals and their Partitioning During Coal Combustion
- 1 September 1999
- journal article
- research article
- Published by Informa UK Limited in Combustion Science and Technology
- Vol. 145 (1-6), 57-81
- https://doi.org/10.1080/00102209908924203
Abstract
This paper gives a detail investigation about the trace elements (TEs) in typical Chinese coals, TEs partitioning during combustion and their different environment impacts. Firstly, it is determined that the contents of 9 TEs (As, Be, Cd, Co, Cr, Cu, Ge, Ni, Pb) and 3 sulfur species (sulfate SO4, sulfide S2− and Organic S0) in 7 density fractions of Qingshan bituminous coal, and the TEs occurrence mode is studied with Solari (1989) model. Moreover, the contents of 12 TEs (including above-mentioned 9 TEs and Mn, V, Zn) in 7 Chinese typical coals are determined and che-momelric methods (factor and cluster analysis) are used to investigate the TEs combination in these coals. Secondly, 8 fly ashes with 4 sizes are sampled during Qingshan bituminous coal combustion in a thermal power plant. Higher temperature and reducing atmosphere are found to enhance greatly the metals enrichment in the submicron and micrometer panicles. An enrichment coefficient is used to describe the TEs partitioning in the fly ash size-fractions and the results are discussed according to three factors: TEs combination in coals, combustion condition in a combustor. and fly ashes size. Finally it is also studied, by the sequential extraction analysis, that the TEs speciation in ashes (dregs and fly ashes) from Qingshan bituminous coal combustion, in order to assess reasonably the TEs environmental impacts.Keywords
This publication has 13 references indexed in Scilit:
- Geological controls on the mineral matter and trace elements of coals from the Fuxin basin, Liaoning Province, northeast ChinaInternational Journal of Coal Geology, 1997
- Trace element partitioning during coal gasificationFuel, 1996
- Trace elements in coal and their behaviour during combustion in a large power stationFuel, 1995
- Overview of trace element partitioning in flames and furnaces of utility coal-fired boilersFuel Processing Technology, 1994
- Trace elements from combustion and gasification of coal—An equilibrium approachProgress in Energy and Combustion Science, 1994
- The fate of trace elements during coal combustion and gasification: an overviewFuel, 1993
- Toxic metal emissions from incineration: Mechanisms and controlProgress in Energy and Combustion Science, 1993
- Trace elements in high-S subbituminous coals from the teruel Mining District, northeast SpainApplied Geochemistry, 1992
- Modelling of the distribution of trace elements in coalFuel, 1989
- Sequential extraction procedure for the speciation of particulate trace metalsAnalytical Chemistry, 1979