In a study aimed at quantitative characterization of coals, the complex permittivity of non-demineralized coals was measured at variable frequency (5-10' Hz) and temperature (22%380 K). The results show that the polarization conductivity follows a law of the type G'(w)=A&. This shows that there is a
Characterization of coal by complexation with iodine
β Scribed by S Aronson; A Schwebel
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 131 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0008-6223
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Electron paramagnetic resonance (EPR) spectra have been obtained on mixtures of iodine with lignite and several grades of bituminous coal. Systematic increases in g-value and linewidth were observed with increasing concentration of iodine. The thermal stability of iodine in these mixtures was also i
The interaction of pyrazolones as a donor with iodine as an acceptor has been studied using spectrophotometric and constant activity methods. The results indicate the formation of 1:1 molecular complex species of n-s\* type. The equilibrium constants of these complexes were determined at different t