N. S. Zakharov, O. M. Gavrilyuk, S. A. Sozinov, A. P. Nikitin
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Influence of the Pyrolytic Temperature on the Carbon Structure of the α Fraction from Coal Tar Pitch: EPR and NMR Spectroscopy
The processes occurring in low-temperature pyrolysis of the α fraction of coal tar pitch over the range 25–700°C are studied by electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) spectroscopy. Up to 400°C, a sequence of processes occurs: homolytic rupture of C–C and C–H bonds is followed by recombination of aromatic π radicals to form graphite-like structures. At the threshold temperature (500°C), recombination of aromatic radicals begins to predominate. Comparison of the results with literature data indicates that, in the range 400–700°C, disordered graphite-like structures are formed. Available physicochemical methods permit detailed study of such structures.
期刊介绍：
The journal publishes scientific developments and applications in the field of coal beneficiation and preparation for coking, coking processes, design of coking ovens and equipment, by-product recovery, automation of technological processes, ecology and economics. It also presents indispensable information on the scientific events devoted to thermal rectification, use of smokeless coal as an energy source, and manufacture of different liquid and solid chemical products.
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