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Coal surface control for advanced physical fine coal cleaning technologies [electronic resource].

Published:
Washington, D.C. : United States. Office of Fossil Energy, 1990.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
Pages: (87 pages) : digital, PDF file
Additional Creators:
University of Pittsburgh. Department of Chemical and Petroleum Engineering, United States. Office of Fossil Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
The progress achieved in leading to effective surface control for selective agglomeration processes was summarized. Several analytical techniques developed in Task 3 were utilized during this quarter to characterize coal samples obtained from agglomeration tests. Surface and near surface (1 μm depth) functional groups were analyzed using Diffuse Reflectance Infrared Fourier Transform spectroscopy. Surface composition analyses were conducted using Laser Microprobe Mass Analyzer. The results of these analysis are being used to relate the agglomeration results with surface modifications to the properties of coal samples. The development of a method a for direct determination of pyrite using X-ray diffraction was continued. The sample preparation technique was improved in order to increase the reproducibility of the analysis. The contact angle of n-heptane droplets on coal pellets immersed in water were measured. The results of these measurements suggest that high shear mixing is necessary for wetting coal surfaces with n-heptane. Agglomeration tests using n-heptane as agglomerant were carried out this quarter. For Pittsburgh {number sign}8 coal, better performance was obtained using n-heptane than using n-pentane. For Upper Freeport coal, however, lower pyritic sulfur rejection was obtained with n-heptane. A n-heptane to coal ratio between 1.25 and 1.5 was found to produce the best performance results for Illinois {number sign}6 coal. A study of the effect of agglomeration time on the agglomeration process performance for Illinois {number sign}6 coal using n-pentane and n-heptane as agglomerants indicates that no significant gains in performance are possible using agglomeration times longer than 60 seconds. The addition of tall oil as a binding agent after the high shear agglomeration step resulted in a large increase in overall coal yield and energy recovery for Illinois {number sign}6 coal. 27 figs., 13 tabs.
Report Numbers:
E 1.99:doe/pc/88877-t6
doe/pc/88877-t6
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Note:
Published through SciTech Connect.
01/01/1990.
"doe/pc/88877-t6"
"DE91007374"
Campbell, P.; Perez, L.; Kim, S.; Chiang, S.-H.; Ciocco, M.; Klinzing, G.; Morsi, B.I.; Araujo, G.; Bi, H.; Blachere, J.; Sharkey, A.; Hittle, L.; Venkatadri, R.
Funding Information:
AC22-88PC88877
View MARC record | catkey: 13842682