Author(s)

Zhenzhen Wang^1,2, Yoshihiro Deguchi², Hiroaki Watanabe³, Ryoichi Kurose⁴, Junjie Yan¹, Jiping Liu¹

¹State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, China.
²Graduate School of Advanced Technology and Science, The University of Tokushima, Tokushima, Japan.
³Energy Engineering Research Laboratory, The Central Research Institute of Electric Power Industry, Kanagawa, Japan.
⁴Department of Mechanical Engineering and Science, Advanced Research Institute of Fluid Science and Engineering, Kyoto University, Kyoto, Japan.

Contents of fly ash are important factors for the operation of coal-fired plants. Real-time monitoring of coal and fly ash such as unburned carbon in fly ash can be an indicator of the combustion conditions. Because of the strong signal intensity and the relative simplicity of the LIBS (Laser- Induced Breakdown Spectroscopy) technique, LIBS can be applicable for real-time composition measurement of coal and fly ash. This research presented here focused on the clarification of the effects of plasma temperature and coexisting materials on quantitative measurement of fly ash contents. Quantitative capability of LIBS was improved using the proposed plasma temperature correction method. The CO2 effect was also discussed to accurately evaluate unburned carbon in fly ash in exhausts. Using the results shown in this study, quantitative measurement of fly ash contents has been improved for wider applications of LIBS to practical fields.

Laser-Induced Breakdown Spectroscopy, Fly Ash, Temperature Correction, CO2 Effect

Wang, Z. , Deguchi, Y. , Watanabe, H. , Kurose, R. , Yan, J. and Liu, J. (2015) Improvement on Quantitative Measurement of Fly Ash Contents Using Laser-Induced Breakdown Spectroscopy. Journal of Flow Control, Measurement & Visualization, 3, 10-21. doi: 10.4236/jfcmv.2015.31002.