The additivity principle in pyrolysis—gas chromatography of brown coal |
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| Authors: | Pavel ?ebesta Viktor Dobal Jaroslav Kubát |
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| Institution: | Institute of Geology and Geotechniques, Czechoslovak Academy of Sciences, V Hole?oviekeech 41. 182 09 Prague Czechoslovakia;Department of Coke, Gas and Air Protection, Institute of Chemical Technology, Suchbáterova 5, 166 28 Prague Czechoslovakia |
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| Abstract: | Pyrolysis—gas chromatography of brown coal exhibits additive properties and it is therefore possible to construct the pyrogram of the original coal from the individual pyrograms of the bitumen, humic acids, lignin and humin fractions. The contents of phenols in the pyrograms are typical for all of the above classes except bitumen and are in agreement with the contents of the individual groups in the original coal. The results suggest that the separation does not bring about significant chemical changes in individual brown coal fractions. |
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