High temperature and high pressure 1H n.m.r. and e.s.r. studies on coal liquefaction reactions
โ Scribed by T. Yokono; S. Iyama; Y. Sanada; S. Shimokawa; E. Yamada
- Book ID
- 107756121
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 415 KB
- Volume
- 65
- Category
- Article
- ISSN
- 0016-2361
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The e.s.r. spectra of Miike and Taiheiyo coals were measured under rapid passage conditions in the temperature range 150-45o"C. A parameter, R, was defined by a ratio of out-of-phase and in-phase spectral amplitudes and the ratios for Miike and Taiheiyo coals were estimated in this temperature range
An autoclave-type 'H NMR probe has been developed to monitor the carbonization process of such carbonaceous materials as coal and pitch under high pressures up to 10 MPa. In the early stages of the carbonization of pitch, the change in hydrogen aromaticity, fHe, was found to be dependent on the appl