Abstract
The four-step chemical extraction method was used for stepwise extraction to compare the occurrence of alkali metals in Naomaohu coal and the other four types of high alkali coal. The coal sample was placed in a vertical furnace with CO gas atmosphere to study the migration and release law of alkali metal with temperature changing at 400–800 °C. The results show that sodium in the Naomaohu coal is mainly in the form of water-soluble sodium, while potassium is mainly composed of insoluble potassium and organic potassium. The increase of pyrolysis temperature promotes the release of sodium and potassium, and the water-soluble sodium changes to insoluble sodium, and a substitution reaction occurs between sodium and potassium. At 700 °C, the amount of sodium and potassium released from the coal char is relatively reduced, resulting in enrichment.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
Guo S, Jiang Y, Xiong Q et al (2017) Study on the regularity of different occurrence forms in the pyrolysis process of Zhundong coal. J Fuel Chem 45(3):257–264
Jiang L, Hu S, Xiang J et al (2012) Release characteristics of alkali and alkaline earth metallic species during biomass pyrolysis and steam gasification process. Bioresour Technol 116:278–284
Li CZ, Sathe C, Kershaw JR et al (2000a) Fates and roles of alkali and alkaline earth metals during the pyrolysis of a Victorian brown coal. Fuel 79(3):427–438
Li CZ, Sathe C, Kershaw JR et al (2000b) Fates and roles of alkali and alkaline earth metals during the pyrolysis of a Victorian brown coal. Fuel 79(3):427–438
Li Y, Xiao J (2005) Occurrence and migration of alkali metals in coal combustion process and related research progress. Clean Coal Technol (01):39–44. https://doi.org/10.13226/j.issn.1006-6772.2005.01.010
Liu D, Zhang S, Tu S et al (2014) Morphological changes during pyrolysis of Wucaiwan coal. J Fuel Chem 42(10):1190–1196
Luo A, Zhu P, Zhang J et al (2018) Effects of carbon dioxide and water atmosphere on migration during high coal conversion. J Fuel Chem (5)
Quyn DM, Wu H, Li C-Z (2002) Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal. Part I. Volatilisation of Na and Cl from a set of NaCI-loaded samples. Fuel 81(2):143–149
Raask E (1985) Mineral impurities in coal combustion, behavior, problems, and remedial measures. Hemisphere Publishing
Song W, Song G, Zhang H et al (2015) Experimental study on migration characteristics of high coal pyrolysis in Zhundong. J Fuel Chem 43(1):16–21
Wang Z, Li Q, Liu J et al (2014) Occurrence forms of alkali metals in Zhundong coal and their migration during pyrolysis. Chin J Electr Eng 34(1):130–135
Wang C, Jin X, Wang Y et al (2015) Release and transformation of sodium during pyrolysis of Zhundong coals. Energy Fuels 29:78–85
Wei X, Huang J, Liu T et al (2008) Transformation of alkali metals during pyrolysis and gasification of a lignite. Energy Fuels 22(3):1840–1844
Wu H, Quyn DM, Li CZ (2002) Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal. Part III. The importance of the interactions between volatiles and char at high temperature. Fuel 81(8):1033–1039
Zeng X, Yu D, Yu G et al (2019) Transformation of inorganic elements in different forms into ash particles during Zhundong coal combustion. J China Coal Soc 44(2):588–595
Zhao P, Zhang X, Li J et al (2018) Hydroliquefaction characteristics of Naomaohu coal and distribution of hydrogen in liquefaction products. Coal Convers 41(164)(04):45–50
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2022 Tsinghua University Press.
About this paper
Cite this paper
Gao, P., Fan, J., Ren, Z. (2022). Study on Alkali Metal Migration Characteristics in the Pyrolysis of Naomaohu Coal in CO Atmosphere. In: Lyu, J., Li, S. (eds) Clean Coal and Sustainable Energy. ISCC 2019. Environmental Science and Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-1657-0_6
Download citation
DOI: https://doi.org/10.1007/978-981-16-1657-0_6
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-16-1656-3
Online ISBN: 978-981-16-1657-0
eBook Packages: EnergyEnergy (R0)