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- W2981796737 abstract "Because particulate matter (PM) emission standards of coal-fired power plants in China are becoming increasingly stricter, a higher sensitivity of traditional PM emission monitoring systems is required to adapt to the proposed ultralow emission (ULE) levels. In this study, a commercial optical structure, white cell optics, was introduced into the traditional extinction system to enhance particulate extinction and lower the detection limit by increasing the light path length. By connecting an aerosol generator and an electrical low-pressure impactor system, the white cell light extinction (WC-LE) system was tested to predict the low particle concentration of spherical silica aerosol and fly ash aerosol. According to the results of real-time testing with spherical silica aerosol, a good response between extinction signal and particle concentration was generally observed over the concentration range of 0–10 mg/m3. An excellent linear correlation between the extinction and particle concentration was obtained from data from short periods without violent feeding fluctuation. Based on the linear correlation, the particle concentration was calculated from the real-time extinction signal. For silica aerosols with different size distributions, the calculated concentration generally showed good correlation with the experimental value; the variation in extinction coefficients derived from the linear correlations was smaller than the theoretical values calculated with the measured size distribution, which seemed to be related to the in-cell mass loss. By testing the system with fly ash aerosols, the real-time response, linear correlation between signals, and concentration measurement also showed satisfactory results. The results of this study show that the WC-LE system is sensitive to small fluctuations in the particle concentration and provides a reliable correlation between the extinction signal and particle concentration, which allows the system to be considered a promising solution for particle emission monitoring at ULE levels." @default.
- W2981796737 created "2019-11-01" @default.
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- W2981796737 date "2019-10-21" @default.
- W2981796737 modified "2023-09-29" @default.
- W2981796737 title "Light Extinction Method for Measuring a Low Particle Concentration with White Cell Optics: Relationship between Light Transmittance and Particle Properties" @default.
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- W2981796737 doi "https://doi.org/10.1021/acs.energyfuels.9b02749" @default.
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