Possibility of Using VIS-NIR Spectroscopic Methods to Determine the Sulfur Content in Brown Coal
A. Wojciechowicz, Ł. Buczkowski, S. Bednarczyk, J. Kowalewski and M. Zięba
Event name: 25th European Meeting of Environmental and Engineering Geophysics
Session: Poster: Hydrogeophysics, Environmental Geophysics
Publication date: 11 September 2019
Info: Extended abstract, PDF ( 543.09Kb )
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The aim of the research was to check the possibility of using VIS-NIR spectroscopic methods to determine the sulfur content in lignite. Spectroscopic studies were carried out on 10 lignite samples, taken directly from the deposit and 4 sulfur samples. Reflectance was measured by a wavelength from 400nm to 1000nm (VIS and VIS-NIR). The final spectrum was the arithmetic mean of reflectance registered during measurements, which was based on 441330 scans. Based on the results of laboratory tests, 6 samples were selected for further analysis, which were divided into two classes: with the lowest sulfur content (from 0.16% - 0.18%) and the highest sulfur content (from 1.0% to 2.3% ). The correlation coefficient of reflectance values of carbon samples (of the relevant classes) with reflectance of sulfur samples was calculated which allowed to evaluate correlation of the relationship between selected variables. For samples with sulfur content from 0.16% to 0.18%, correlation coefficient fluctuates from 0.26 to 0.37, while for samples with sulfur content from 1% to 2.3% ranges from 0.68 to 0, 74.