Low temperature ( less than equivalent to 100 degree C) coal oxidation processes are known to have a pronounced effect on important coal properties such as coking and caking behavior, heat of combustion, flotability slurry pH, tar yield and extractability. However, the mechanisms and kinetics of the chemical reactions underlying such 'weathering' processes in coals are far from well understood. Among the most promising analytical methods for elucidating the structural and compositional changes during coal weathering are Fourier Transform infrared (FTIR) spectroscopy and pyrolysis mass spectrometry (Py-MS). In the present article new Py-MS data on low temperature oxidation effects in several U. S. coals of different rank and origin will be discussed with special emphasis on the role of different coal macerals.
|Number of pages||9|
|Journal||ACS Division of Fuel Chemistry, Preprints|
|Publication status||Published - Jan 1 1987|
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