E.s.r. study of electron acceptor doped coals
β Scribed by Yuzo Sanada; Haruo Kumagai; Masahide Sasaki
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 370 KB
- Volume
- 73
- Category
- Article
- ISSN
- 0016-2361
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π SIMILAR VOLUMES
Wyodak and Heatburg subbituminous coals were pyrolysed in-situ in an e.s.r. microwave cavity at -510Β°C in an evacuated sealed tube. At least two kinds of radicals are detected; first, phenalenyl-like radicals and then, polymerized radicals from the initial ones.
An investigation was carried out to explore the importance of two line-broadening mechanisms which may be responsible for the width of the electron spin resonance signals exhibited by coals. Studies of catalytically dehydrogenated coals, isotopically substituted low-temperature chars, and a large nu