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Chemical characterization of the surface sites of coal [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: (17 pages) : digital, PDF file
Additional Creators
Lehigh University, United States. Office of Fossil Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
We propose to do experimental studies in four related areas concerning the acid-base properties of coal surfaces; (1) develop high precision flow microcalorimetric methods for determining the concentrations and strengths of the acidic and basic surface sites of coal powders; (2) develop photo-acoustic FTIR and solid-state NMR spectral shift techniques for determination of the concentrations and strengths of acidic and basic surface sites of coal powders; (3) determine the concentrations and strengths of the acidic and basic surface sites of some of the well-characterized coal samples from Argonne National Labs, comparing the coal samples before and after demineralization treatments with HCl and HF; (4) study the effects of surface acidity and basicity on the coal/water interface, with emphasis on the role of interfacial acid-base interactions in the adsorption of ions, surfactants and coal/water slurry stabilizers. A practical application of the new measurements of the acidity and basicity of surface sites will be to exploit acid-base contributions to preferential wettability for optimizing separation of coal pyrites from the organic components. Work this quarter concentrated on flow microcalorimetry for assessing acidity/basicity of coal powders. 8 refs., 9 figs., 1 tab.
Report Numbers
E 1.99:doe/pc/79925-11
doe/pc/79925-11
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
08/01/1990.
"doe/pc/79925-11"
"DE91000005"
Cole, D.A.; Lloyd, T.B.; Fowkes, F.M.
Funding Information
FG22-87PC79925
View MARC record | catkey: 13842590