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Role of spent shale in oil shale processing and the management of environmental residues. Final technical report, January 1979-May 1980

Description: The adsorption of hydrogen sulfide on retorted oil shale was studied at 10, 25, and 60/sup 0/C using a packed bed method. Equilibrium isotherms were calculated from the adsorption data and were modeled by the Langmuir, Freundlich, and Polanyi equations. The isosteric heat of adsorption was calculated at three adsorbent loadings and was found to increase with increased loading. A calculated heat of adsorption less than the heat of condensation indicated that the adsorption was primarily due to V… more
Date: August 15, 1980
Creator: Hines, A.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical characterization of the surface sites of coal

Description: 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 str… more
Date: August 1, 1990
Creator: Fowkes, F.M.; Lloyd, T.B. & Cole, D.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Numerical estimation of adsorption energy distributions from adsorption isotherm data with the expectation-maximization method

Description: The expectation-maximization (EM) method of parameter estimation is used to calculate adsorption energy distributions of molecular probes from their adsorption isotherms. EM does not require prior knowledge of the distribution function or the isotherm, requires no smoothing of the isotherm data, and converges with high stability towards the maximum-likelihood estimate. The method is therefore robust and accurate at high iteration numbers. The EM algorithm is tested with simulated energy distrib… more
Date: August 1, 1993
Creator: Stanley, B. J. & Guiochon, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical characterization of the surface sites of coal

Description: 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 str… more
Date: August 1, 1990
Creator: Fowkes, F. M.; Kardos, K.; Riddle, F. L., Jr. & Cole, D. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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