Abstract
DURING carbonization in vacuo at constant heating rates of 1 and 3deg.C./min. we measured the number of free radicals per gram of starting material of a vitrain with a carbon content of 86.9 per cent. This was done by means of an electron spin resonance spectrometer working at 9,000 Mc./s. The results are given in Fig. 1.
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References
van Krevelen, D. W., Huntjens, F. W., and Dormans, H. N. M., Fuel, 35, 462 (1956).
Smidt, J., and van Krevelen, D. W., Fuel (in the press).
Austen, D. E. G., and Ingram, D. J. E., Brennstoff Chem., 39, 25 (1958).
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SMIDT, J., VAN KKEVELEN, D. Number of Free Radicals in Coal During Carbonization at Different Heating Rates. Nature 184, 719–720 (1959). https://doi.org/10.1038/184719b0
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DOI: https://doi.org/10.1038/184719b0
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