Download 1991 International Conference on Coal Science Proceedings. by Yong Zhou PDF

By Yong Zhou

1991 overseas convention on Coal technological know-how lawsuits

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Read or Download 1991 International Conference on Coal Science Proceedings. Proceedings of the International Conference on Coal Science, 16–20 September 1991, University of Newcastle-Upon-Tyne, United Kingdom PDF

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Extra info for 1991 International Conference on Coal Science Proceedings. Proceedings of the International Conference on Coal Science, 16–20 September 1991, University of Newcastle-Upon-Tyne, United Kingdom

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Variations in the extent of shrinkage brown coal per unit of moisture removed have been interpreted in terms of the role of different types of moisture in coal [1]. The isosteric heat of moisture sorption on coals has been observed to be a function of amount of water in the coal [10]. The fact that hysteresis in coal moisture sorption isotherms must be determined by shrinkage and swelling effects [11] complicates interpretation of such data, however. Perhaps one of the simplest illustrations of the multifaceted nature of water in coals has been provided by the observation that the dehydration behavior as a function of time is not particularly simple [12- 14].

Maybe, the permeability of the additives into the macromolecular structure of coal and the affinity between the additives and the coal molecules, are also concerned with the effect of additives on the solubility of coal molecules. A detail study of the mechanism of the association is now being carried out. REFERENCES 1. , Kumagai, J. , J. Fuel See. Japan, 64, 210 (1985) 2. , Ohsuga, H. , Fuel, 67, 1639 (1988) 3. , Tsueta, H. , Fuel, 68, 1588 (1989) 4. , Raymond, R. , Science, 188, 49 (1975) 5. , Raman, K.

This approach is more precipitous the greater the efficacy of the solvent treatment. In Fig. 2 the relative extents of molecular déstabilisation due to thermal as compared to the three solvent treatments are illustrated by plots of the ratio AM2'j/(heat)/AM2'T/(solv). **v normalising the solvent data of Fig. 1 against the thermal déstabilisation data in this way, the scatter in plots against % carbon is reduced especially for the binary solvent treatment, indicating a strong correlation between the effects compared.

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