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A Review of On-Line Measurement Methods of Alkali Metal Emissions from Combustion by Passive Spontaneous Emission Spectroscopy

Author

Listed:
  • Weihui Liao

    (Guangdong Red Bay Generation Co., Ltd., Shanwei 516623, China)

  • Chao Yan

    (Guangdong Red Bay Generation Co., Ltd., Shanwei 516623, China)

  • Xingcheng Lyu

    (Guangdong Red Bay Generation Co., Ltd., Shanwei 516623, China)

  • Yang Pu

    (State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Chun Lou

    (State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Mooktzeng Lim

    (Department of Mechanical Engineering, Faculty of Engineering and Quantity Surveying, INTI International University & Colleges, Nilai 71800, Negeri Sembilan, Malaysia)

Abstract

This article reviews the principles and applications of passive spontaneous emission spectroscopy (SES) for the quantitative determination of alkali metal concentrations emitted from combustion processes. The combustion of fuels that contain a high alkali metal content (Na and/or K) is challenging, as alkali metals reduce the slag formation temperature and induce fouling, causing combustion facilities to shutdown prematurely. The in situ on-line quantification of alkali metals is, thus, a critical measure to control combustion processes, preventing slagging and fouling from occurring. This review shows that several SES systems, developed by the Huazhong University of Science and Technology (HUST), are inexpensive, portable, and useful for measuring the alkali metal content, and have been applied for biomass combustion as well as coal and municipal solid waste combustion, from laboratory-scale settings (20 kW) to industrial facilities (300 MW). Compared with other research, the SES system from HUST has successfully quantified the emitted alkali metal concentrations during combustion. This review also highlights the challenges of the SES system and recommends further work to improve it for further applications.

Suggested Citation

  • Weihui Liao & Chao Yan & Xingcheng Lyu & Yang Pu & Chun Lou & Mooktzeng Lim, 2022. "A Review of On-Line Measurement Methods of Alkali Metal Emissions from Combustion by Passive Spontaneous Emission Spectroscopy," Energies, MDPI, vol. 15(24), pages 1-13, December.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:24:p:9392-:d:1000919
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    References listed on IDEAS

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    1. Zhao, Jing & Li, Bo & Wei, Xiaolin & Zhang, Yufeng & Li, Teng, 2020. "Slagging characteristics caused by alkali and alkaline earth metals during municipal solid waste and sewage sludge co-incineration," Energy, Elsevier, vol. 202(C).
    2. Xuehui Jing & Yang Pu & Zhaoyu Li & Quanli Tang & Bin Yao & Peifang Fu & Chun Lou & Mooktzeng Lim, 2022. "Experimental Investigation of Gaseous Sodium Release in Slag-Tapping Coal-Fired Furnaces by Spontaneous Emission Spectroscopy," Energies, MDPI, vol. 15(11), pages 1-11, June.
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