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Measurement of anisotropic development in a low-rank coal using e.s.r. spectroscopy and optical texture

✍ Scribed by JoséM. Rincón; Ralf Carvajal; Luis A. Pacheco

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
430 KB
Volume
64
Category
Article
ISSN
0016-2361

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✦ Synopsis

Anisotropicdevelopment

in a low-rank coal (Cerrej6n coal) has been induced using natural heavy oil or anthracene oil as additives in a cocarbonization system at 500°C. The heavy oil showed better modifying activity. To monitor the anisotropic development optical microscopy and e.s.r. spectroscopy have been used. The concentration of stabilized free radicals, measured at room temperature (trapped free radicals) increased with anisotropic development. The concentration of stabilized free radicals allows interaction in the carbonization system to be followed even when the microcrystallinity of the anisotropic phase is too small to be observed under the microscope.

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✍ S. Iyama; T. Yokono; Y. Sanada 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 739 KB

The extent of development of anisotropic texture in cokes prepared from various coals or blended coals in co-carbonization systems was assessed by using the ratio of hydrogen donor ability to acceptor ability. A parameter D/A, corresponding to the amount of hydrogen transfer during carbonization in