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Environmental Science and Pollution Research

, Volume 24, Issue 30, pp 23578–23583 | Cite as

Mercury release during thermal treatment of two Chinese coal gangues

  • Shaoqing Guo
  • Xiangrui Niu
  • Jindong Zhai
Research Article

Abstract

The utilization of coal gangue in power plants has become a new anthropogenic discharge source of mercury and attracted much concern in China. It is crucial to obtain the information about the mercury release during thermal treatment of coal gangue. In this study, the mercury release behavior of two coal gangues selected from two power plants were studied under different thermal treatment conditions of heating rate, residence time, and atmosphere. The results of mercury release profile show that the specified release temperature ranges for the different modes of occurrence of Hg are scarcely affected by the heating rate of 10, 20, and 40 °C/min. A higher heating rate could promote the Hg release to some extent. The mercury release ratio gradually increases with the extension of residence time for both coal gangues. The oxidizing environment has a positive effect on mercury release < 600 °C and has a minor effect > 600 °C. Mercury in coal gangue is more volatile than coal gangue matrix and the mercury in GD coal gangue is more easily released out than that in ED coal gangue.

Keywords

Coal gangue Mercury Release behavior Thermal treatment 

Notes

Acknowledgments

The authors gratefully acknowledge the financial support from the Natural Science Foundation of China (41372350).

References

  1. Burmistrz P, Kogut K, Marczak M, Zwoździak J (2016) Lignites and subbituminous coals combustion in Polish power plants as a source of anthropogenic mercury emission. Fuel Process Technol 152:250–258.  https://doi.org/10.1016/j.fuproc.2016.06.011
  2. Chmielniak T, Słowik K, Sajdak M (2017) Mercury removal by mild thermal treatment of coal. Fuel, 195:290–298.  https://doi.org/10.1016/j.fuel.2017.01.073
  3. Chugh YP, Patwardhan A (2004) Mine-mouth power and process steam generation using fine coal waste fuel. Resour Conserv Recycl 40:225–243.  https://doi.org/10.1016/S0921-3449(03)00071-5
  4. Gao LB, Guo SQ, Wei XX, Cao YZ. (2016). The effect of atmosphere on elemental mercury release during thermal treatment of two bituminous coals. J Braz Chem Soc 27: 2210–2215.  https://doi.org/10.5935/0103-5053.20160113
  5. Gao LB, Wang YP, Huang QW, Guo SQ (2017) Modes of occurrence and thermal stability of mercury in different samples from Guandi coal preparation plant. Fuel 200:22–30.  https://doi.org/10.1016/j.fuel.2017.03.045
  6. Guffey FD, Bland AE (2004) Thermal pretreatment of low-ranked coal for control of mercury emissions. Fuel Process Technol 85:521–531.  https://doi.org/10.1016/j.fuproc.2003.11.006 CrossRefGoogle Scholar
  7. Guo SQ, Yang JL, Liu ZY (2008) Influence of atmosphere on mercury release during Jincheng coal pyrolysis. Fuel Chem Technol 36:397–400Google Scholar
  8. Guo SQ, Yang JL, Liu ZY, Xiao Y (2009) Behavior of mercury release during thermal decomposition ofcoals. Korean J Chem Eng 26:560–563.  https://doi.org/10.1007/s11814-009-0095-9
  9. Jang JW, Park JW (2014) Iron oxide nanotube layer fabricated with electrostatic anodization for heterogeneous Fenton like reaction. Hazard Mater 273:1–6.  https://doi.org/10.1016/j.jhazmat.2014.03.002
  10. Lin L, Khang SJ, Keener TC (1997) Coal desulfurization by mild pyrolysis in a dual-auger coal feeder. Fuel Process Technol 53:15–30.  https://doi.org/10.1016/S0378-3820(97)00008-8 CrossRefGoogle Scholar
  11. Liu L, Duan YF, Wang YJ, Wang H, Yin JJ (2010) Experimental study on mercury release behavior and speciation during pyrolysis of two different coals. Fuel Chem Technol 38:134–139.  https://doi.org/10.1016/S1872-5813(10)60026-6 CrossRefGoogle Scholar
  12. López-Antón MA, Díaz-Somoano M, Ochoa-González R, Martínez-Tarazona MR (2012) Analytical methods for mercury analysis in coal and coal combustion by-products. Int J Coal Geol 94:44–53.  https://doi.org/10.1016/j.coal.2012.01.010 CrossRefGoogle Scholar
  13. Meng FR, Yu JL, Tahmasebi A, Han YN (2013) Pyrolysis and combustion behavior of coal gangue in O2/CO2 and O2/N2 mixtures using thermogravimetric analysis and a drop tube furnace. Energy & Fuels 27:2923–2932.  https://doi.org/10.1021/ef400411w Energy Fuels 2013, 27, 2923−2932
  14. Merdesa AC, Keenera TC, Khangb SJ, Jenkinsb RG (1998) Investigation into the fate of mercury in bituminous coal during mild pyrolysis. Fuel 77:1783–1792.  https://doi.org/10.1016/S0016-2361(98)00087-8
  15. Querol X, Izquierdo M, Monfort E, Alvarez E, Font O, Moreno T, Alastuey A, Zhuang X, Lu W, Wang Y (2008) Environmental characterization of burnt coal gangue banks at Yangquan, Shanxi Province, China. Int J Coal Geol 75:93–104.  https://doi.org/10.1016/j.coal.2008.04.003 CrossRefGoogle Scholar
  16. Ren J, Xie CJ, Lin JY, Li Z (2014) Co-utilization of two coal mine residues: non-catalytic deoxygenation of coal mine methane over coal gangue. Process Saf Environ Prot 92:896–902.  https://doi.org/10.1016/j.Psep.2013.10.002
  17. Sekine Y, Sakajiri K, Kikuchi E, Matsukata M (2008) Release behavior of trace elements from coal during high-temperature processing. Powder Technol 180:210–215.  https://doi.org/10.1016/j.powtec.2007.03.012
  18. Sondreal EA, Benson SA, Pavlish JH, Ralston NV (2004) An overview of air quality III: mercury, trace elements, and particulate matter. Fuel Process Technol 85:425–440.  https://doi.org/10.1016/j.fuproc.2004.02.002 CrossRefGoogle Scholar
  19. Strezov V, Morrison A, Nelson PF (2007) Pyrolytic mercury removal from coal and its adverse effect on coal swelling. Energy Fuel 21:496–500.  https://doi.org/10.1021/ef060407a CrossRefGoogle Scholar
  20. Uruski L, Gorecki J, Macherzynski M, Dziok T, Golas J. (2015). The ability of polish coals to release mercury in the process of thermal treatment. Fuel process Technol 140:12-20.  https://doi.org/10.1016/j.fuproc.2015.08.005
  21. Wang JC, Zhang YP, Han LN, Chang LP, Bao WR (2013) Simultaneous removal of hydrogen sulfide and mercury from simulated syngas by iron-based sorbents. Fuel 103:73–79.  https://doi.org/10.1016/j.fuel.2011.10.056 CrossRefGoogle Scholar
  22. Wang M, Keener TC, Khang SJ (2000) The effect of coal volatility on mercury removal from bituminous coal during mild pyrolysis. Fuel Process Technol 67:147–161.  https://doi.org/10.1016/S0378-3820(00)00098-9
  23. Wilcox J, Rupp E, Ying SC, Lim DH, Negreira AS, Kirchofer A, Feng F, Lee K (2012) Mercury adsorption and oxidation in coal combustion and gasification processes. Int J Coal Geo 90-91:4–20.  https://doi.org/10.1016/j.coal.2011.12.003 CrossRefGoogle Scholar
  24. Xu P, Luo GQ, Zhang B, Zeng XB, Xu Y, Zou RJ, Gan RL, Yao H (2017) Influence of low pressure on mercury removal from coals via mild pyrolysis. Appl Therm Eng 113:1250–1255.  https://doi.org/10.1016/j.applthermaleng.2016.11.149
  25. Xu ZH, Lu GQ, Chan Y (2004) Fundamental study on mercury release characteristics during thermal upgrading of an Alberta sub-bituminous coal. Energy Fuel 18:1855–1861.  https://doi.org/10.1021/ ef049870i CrossRefGoogle Scholar
  26. Yudovich YE, Ketris MP (2005) Mercury in coal: a review part 2. Coal use and environmental problems. Int J Coal Geol 62:135–165.  https://doi.org/10.1016/j.coal.2004.11.003 CrossRefGoogle Scholar
  27. Zhai JD, Guo SQ, Wei XX, Cao YZ, Gao LB (2015) Characterization of the modes of occurrence of mercury and their thermal stability in coal gangues. Energy Fuels 29:8239–8245.  https://doi.org/10.1021/acs.energyfuels.5b01406 CrossRefGoogle Scholar
  28. Zhang C, Chen G, Gupta R, Xu ZH (2009) Emission control of mercury and sulfur by mild thermal upgrading of coal. Energy Fuel 23:766–773.  https://doi.org/10.1021/ef8007344 CrossRefGoogle Scholar
  29. Zhao C, Luo KL (2017) Sulfur, arsenic, fluorine and mercury emissions resulting from coal-washing byproducts: a critical component of China’s emission inventory. Atmos Environ 152:270–278.  https://doi.org/10.1016/j.atmosenv.2016.12.001
  30. Zhou CC, Liu GJ, Yan ZC, Fang T, Wang RW (2012) Transformation behavior of mineral composition and trace elements during coal gangue combustion. Fuel 97:644–650.  https://doi.org/10.1016/j. fuel.2012.02.027 CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.School of Environment and SafetyTaiyuan University of Science and TechnologyTaiyuanPeople’s Republic of China

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