Comparison of experimental solvent extraction techniques to determine the apparent composition of solvent refined coal |
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| Authors: | Ronald L Miller Frederic K Wasden |
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| Affiliation: | Department of Chemical Engineering, University of Wyoming, Laramie, WY 82071 U.S.A. |
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| Abstract: | The apparent composition of Kentucky 9/14 solvent refined coal (SRC) has been determined by two Soxhlet solvent extraction techniques and one ultrasonic bath extraction technique. Each Soxhlet method gave significantly different composition results. Further, neither Soxhlet method gave results which agreed with data from the ambient temperature ultrasonic bath extractions. A third Soxhlet method involving reverse sequential extraction was found to be unsatisfactory for routine quantitative use because of excessive solvent loss and the possibility of sample repolymerization. |
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