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Laser & Optoelectronics Progress, Volume. 56, Issue 19, 193002(2019)

Quantitative Analysis on Coal Calorific Value Using Nanosecond, Femtosecond, and Dual-Pulse Laser-Induced Breakdown Spectroscopy

Jian Huang1、**, Jingqi Lu1、*, Huan Yang2, and Xiangdong Cao2
Author Affiliations
  • 1Department of Physics, College of Science of Wuhan University of Technology, Wuhan, Hubei 430070, China
  • 2Wuhan Hongtuo New Technology Co., Ltd., Wuhan, Hubei 430070, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (9)
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    References (22)
    Cited By (5)
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    Figures & Tables(9)
    Structural diagram of single pulse LIBS setup

    Fig. 1. Structural diagram of single pulse LIBS setup

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    Structural diagram of double pulse LIBS setup

    Fig. 2. Structural diagram of double pulse LIBS setup

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    Spectrograms of coal samples. (a) ns-LIBS; (b) fs-LIBS

    Fig. 3. Spectrograms of coal samples. (a) ns-LIBS; (b) fs-LIBS

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    Scatter plot of normalized emission intensity of C

    Fig. 4. Scatter plot of normalized emission intensity of C

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    Linear fitting of C content. (a) ns-LIBS; (b) ns-LIBS after correction; (c) fs-LIBS

    Fig. 5. Linear fitting of C content. (a) ns-LIBS; (b) ns-LIBS after correction; (c) fs-LIBS

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    Femtosecond laser and dual-pulse laser induced spectrogram

    Fig. 6. Femtosecond laser and dual-pulse laser induced spectrogram

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    Predicted calorific value by PLS. (a) ns-LIBS; (b) fs-LIBS; (c) DP-LIBS

    Fig. 7. Predicted calorific value by PLS. (a) ns-LIBS; (b) fs-LIBS; (c) DP-LIBS

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    • Table 1. Carbon mass fraction and calorific value of standard coal samples

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      Table 1. Carbon mass fraction and calorific value of standard coal samples

      Sample No.Mass fractionof C /%Calorific value /(MJ·kg-1)Sample No.Mass fractionof C /%Calorific value /(MJ·kg-1)
      179.7031.231057.8222.45
      276.2130.001156.1521.64
      381.4431.741218.437.60
      478.0830.28135.802.28
      581.4531.861478.3031.29
      678.5832.601582.3032.16
      779.6031.501679.7731.09
      849.3019.421776.5729.90
      967.0826.951880.7931.50

    • Table 2. Emission line of input parameter for quantitative analysis based on PLS

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      Table 2. Emission line of input parameter for quantitative analysis based on PLS

      ElementEmission line /nmInput emission /nmElementEmission line /nmInput emission /nm
      C247.84247.65-248.15Si288.13288.02-285.54
      Mg285.17285.00-285.52Al309.27309.00-309.50
      Ti334.92334.80-335.10Fe393.36393.03-393.56
      CN388.28387.44-388.48Ca422.69422.42-422.90
      C2516.37516.21-516.73Na589.72589.52-589.91
      H656.22653.00-659.78O777.34776.47-777.88
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    Jian Huang, Jingqi Lu, Huan Yang, Xiangdong Cao. Quantitative Analysis on Coal Calorific Value Using Nanosecond, Femtosecond, and Dual-Pulse Laser-Induced Breakdown Spectroscopy[J]. Laser & Optoelectronics Progress, 2019, 56(19): 193002

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    Paper Information

    Category: Spectroscopy

    Received: Mar. 14, 2019

    Accepted: Apr. 19, 2019

    Published Online: Oct. 23, 2019

    The Author Email: Jian Huang (709008668@qq.com), Jingqi Lu (lujingqi@whut.edu.cn)

    DOI:10.3788/LOP56.193002

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology