Abstract
Curie-point pyrolysis mass spectrometry (PyMS) was performed at 1043 K to characterize a set of 40 coal samples, ranging from anthracite to lignite* Six coal samples, representative for the entire range of coal ranks, were selected from the set of 40 coals to study the pyrolysis product mixtures as a function of the coal rank in more detail by Curie-point pyrolysis gas chromatographic techniques (PyGC and PyGCMS). PyMS revealed that the number and nature of the pyrolysis products, particularly the degree of oxygen functionality of the one ring aromatic compounds formed, are characteristics for the rank of a coal sample* Furthermore, the formation of hydrogen sulphide is highly characteristic for high sulfur coals* Classification of the coal samples according to their rank order is possible on the basis of their Curie-point pyrolysis mass spectra. However, additional characterization of the coals by the conventional analyses and tests is still necessary due to the qualitative character of the Curie-point pyrolysis technique* The Curie-point PyGC analyses give fundamental knowledge on the metamorphism of coal precursor material like lignins and on the development of the molecular structure composition of coals during maturation. Evidence of the so called mobile phase of coals and its composition are obtained by gas chromatographic analysis of the product mixtures evolved from the coals at a Curie-pont pyrolysis temperature of 631 K.
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Tromp, P.J.J., Moulijn, J.A., Boon, J.J. (1988). Coal Characterization by Means of Curie-Point Pyrolysis Techniques. In: Yürüm, Y. (eds) New Trends in Coal Science. NATO ASI Series, vol 244. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3045-2_11
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DOI: https://doi.org/10.1007/978-94-009-3045-2_11
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