Prediction of coal hydrophobicity
| Autor: | R. Markuszewski, R.K. Guo, H.T. David, B.C.J. Labuschagne, T.D. Wheelock |
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| Rok vydání: | 1988 |
| Předmět: |
Materials science
Moisture Petroleum engineering business.industry Economies of agglomeration technology industry and agriculture chemistry.chemical_element respiratory system complex mixtures respiratory tract diseases Contact angle Chemical engineering chemistry otorhinolaryngologic diseases Coal Wetting Froth flotation business Water content Carbon |
| DOI: | 10.2172/10163351 |
| Popis: | Many coals exhibit a certain degree of native hydrophobicity. The more hydrophobic coals (the higher-rank coals) are easily beneficiated by froth flotation or oil agglomeration, while the more hydrophilic coals (the lower-rank coals) are floated or agglomerated with difficulty. Coals of different ranks and often even of the same rank sometimes differ greatly in hydrophobicity as measured by contact angle or natural floatability. Although the degree of hydrophobicity of a coal is related to its rank and has been correlated with other surface properties of the coal , the known information is still not sufficient to allow a good estimation to be made of the hydrophobicity of a given coal and does not explain the variation of coal hydrophobicity as a function of rank. A statistical analysis of previously published data, as well as newly acquired data, shows that coal hydrophobicity correlates better with moisture content than with carbon content, and better with the moisture/carbon molar ratio than with the hydrogen/carbon or oxygen/carbon atomic ratios. These findings indicate that there is a strong association between hydrophobicity and coal moisture content. |
| Databáze: | OpenAIRE |
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