Trace elements in Chinese coals and their partitioning during coal combustion

被引:24
|
作者
Yan, R
Lu, XH
Zeng, HC
机构
[1] Huazhong Univ Sci & Technol, Natl Key Lab Coal Combust, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, Dept Chem, Wuhan 430074, Peoples R China
关键词
Chinese coals; combustion; trace elements; fly ash; mobility; pollution;
D O I
10.1080/00102209908924203
中图分类号
O414.1 [热力学];
学科分类号
摘要
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 SO42-, sulfide S2- and Organic S-0) 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 chemometric 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 particles. 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.
引用
收藏
页码:57 / 81
页数:25
相关论文
共 50 条
  • [1] A LABORATORY STUDY OF THE PARTITIONING OF TRACE-ELEMENTS DURING PULVERIZED COAL COMBUSTION
    BOOL, LE
    HELBLE, JJ
    [J]. ENERGY & FUELS, 1995, 9 (05) : 880 - 887
  • [2] A Review of Key Hazardous Trace Elements in Chinese Coals: Abundance, Occurrence, Behavior during Coal Combustion and Their Environmental Impacts
    Tian, H. Z.
    Lu, L.
    Hao, J. M.
    Gao, J. J.
    Cheng, K.
    Liu, K. Y.
    Qiu, P. P.
    Zhu, C. Y.
    [J]. ENERGY & FUELS, 2013, 27 (02) : 601 - 614
  • [3] Partitioning of trace elements in the flue gas front coal combustion
    Yan, R
    Gauthier, D
    Flamant, G
    [J]. COMBUSTION AND FLAME, 2001, 125 (1-2) : 942 - 954
  • [4] Partitioning of trace elements during the combustion of coal and biomass in a suspension-firing reactor
    Miller, BB
    Dugwell, DR
    Kandiyoti, R
    [J]. FUEL, 2002, 81 (02) : 159 - 171
  • [5] Partitioning behavior during coal combustion of potentially deleterious trace elements in Ge-rich coals from Wulantuga coal mine, Inner Mongolia, China
    Wang, Xiaoshuai
    Tang, Yuegang
    Schobert, Harold H.
    Ma, Tengda
    Pisupati, Sarma, V
    Zhang, Junying
    Chen, Yifan
    [J]. FUEL, 2021, 305
  • [6] Modeling trace element partitioning during coal combustion
    James, David W.
    Krishnamoorthy, Gautham
    Benson, Steven A.
    Seames, Wayne S.
    [J]. FUEL PROCESSING TECHNOLOGY, 2014, 126 : 284 - 297
  • [7] Partitioning of hazardous trace elements during coal preparation
    Wang Wen-feng
    Qin Yong
    Wang Jun-yi
    Li Jian
    [J]. PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON MINING SCIENCE & TECHNOLOGY (ICMST2009), 2009, 1 (01): : 838 - 844
  • [8] TRACE ELEMENTS IN COAL AND THEIR DISTRIBUTION CHARACTERISTICS DURING COAL COMBUSTION
    孙景信
    AND R. E. JERVIS
    [J]. Science China Mathematics, 1987, (03) : 288 - 297
  • [9] TRACE ELEMENTS IN COAL AND THEIR DISTRIBUTION CHARACTERISTICS DURING COAL COMBUSTION
    孙景信
    AND R. E. JERVIS
    [J]. Science in China,Ser.A., 1987, Ser.A.1987 (03) - 297
  • [10] Occurrences of valuable trace elements in Iranian coals as potential coal combustion byproducts
    Chelgani, S. Chehreh
    [J]. INTERNATIONAL JOURNAL OF COAL PREPARATION AND UTILIZATION, 2021, 41 (07) : 508 - 520