First multi-tool exploration of a gas-condensate-pyrolysate system from the environment of burning coal mine heaps: An in situ FTIR and laboratory GC and PXRD study based on Upper Silesian materials

The Science of the Total Environment
Łukasz KruszewskiIzabela Moszumańska

Abstract

A methodological approach to the complex geochemical analysis of the coal fire in burning coal mine heaps (BCMH) of Upper Silesian Coal Basin has been developed. The other approach used is gas chromatography and indicatory tubes. Powder X-Ray Diffraction is applied for phase analysis to determine the species composition of mineral condensates present within and around gas flues. The gas compositions are proved to be extremely variable, when comparing both different BCMH and flues or flue zones of the same heaps. One outstanding determination concerns GeCl4, found in most samples often in large quantities. No evident dependence between the gas and mineral condensate compositions is found: N-rich condensates may but do not have to be associated with NH3-, pyridine-, or NOx-rich gases. This is also true for S-rich and Cl-rich mineralization in connection with gases of SO2, H2S, OCS, CS2, thiophene, dimethyl sulfide, dimethyl disulfide, HCl, and various halogenated hydrocarbons. Fluorine is rarely present as HF, whereas SiF4 occurs more frequently and in much larger quantities. AsH3 is mainly a trace gas but may locally be enriched. Besides the common gases, a number of trace gases is also determined based on residual FTIR spectra....Continue Reading

Citations

Jan 5, 2020·Environmental Science and Pollution Research International·Ádám NádudvariAdam Kowalski
Jul 12, 2021·The Science of the Total Environment·Chani WelchM Jim Hendry

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