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Title: Characterization of selected Ohio coals to predict their conversion behavior relative to 104 North American Coals. [Factors correlating with liquefaction behavior]

Abstract

Twenty-six coal samples from Ohio were collected as washed and seam samples, and lithobodies within the seams. Characterization of these samples included determination of % maceral, % anti R/sub max/, LTA, chlorine content and proximate/ultimate and qualitative mineral analyses. These data were compared to data from a similar project by Yarzab, R.F., et al., 1980 completed at Pennsylvania State University using tetralin as the hydrogen donor solvent. The characteristics of these coals were correlated with liquefaction conversion and other data accrued on 104 North American coals by statistical analyses. Utilizing percent carbon, sulfur, volatile matter, reflectance, vitrinite and total reactive macerals, Q-mode cluster analysis demonstrated that Ohio coals are more similar to the coals of the Interior province than to those of the Appalachian province. Linear multiple regression analysis for the 104 North American coals provided a prediction equation for conversion (R = .96). The predicted conversion values for the samples range from 58.8 to 79.6%, with the Lower Kittanning (No. 5) and the Middle Kittanning (No. 6) coal seams showing the highest predicted percent conversion (respectively, 73.4 and 72.2%). The moderately low FSI values for the No. 5 and No. 6 coals (respectively, 2.5 and 3) and their moderatelymore » high alkaline earth content (respectively, 0.69 and 0.74%) suggest that these coals possess the best overall properties for conversion. Stepwise regression has indicated that the most important coal characteristics affecting conversion are, in decreasing order of importance: % volatile matter, % vitrinite and % total sulfur. Conversion processes can be expected to produce higher yields with Ohio coals due to the presence of such mineral catalysts as pyrite and kaolinite. It is believed that the presence of these disposable catalysts increases the marketability of Ohio coals.« less

Authors:
; ;
Publication Date:
Research Org.:
Toledo Univ., OH (USA). Organic Carbon Facility
Sponsoring Org.:
USDOE
OSTI Identifier:
6754230
Alternate Identifier(s):
OSTI ID: 6754230; Legacy ID: DE83000166
Report Number(s):
DOE/ET/14806-27-Vol.3
ON: DE83000166
DOE Contract Number:
AC22-79ET14806
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of document are illegible
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL; CHEMICAL COMPOSITION; SULFUR CONTENT; VOLATILE MATTER; COAL LIQUEFACTION; KAOLINITE; CATALYTIC EFFECTS; MINERALS; PYRITE; ASHES; CATALYSIS; CHLORIDES; COMPARATIVE EVALUATIONS; CORRELATIONS; EXPERIMENTAL DATA; MACERALS; REFLECTIVITY; REGRESSION ANALYSIS; ALUMINIUM COMPOUNDS; ALUMINIUM SILICATES; CARBONACEOUS MATERIALS; CHALCOGENIDES; CHLORINE COMPOUNDS; DATA; ENERGY SOURCES; FOSSIL FUELS; FUELS; HALIDES; HALOGEN COMPOUNDS; INFORMATION; IRON COMPOUNDS; IRON SULFIDES; LIQUEFACTION; MATERIALS; MATHEMATICS; MATTER; NUMERICAL DATA; OPTICAL PROPERTIES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RESIDUES; SILICATE MINERALS; SILICATES; SILICON COMPOUNDS; STATISTICS; SULFIDE MINERALS; SULFIDES; SULFUR COMPOUNDS; SURFACE PROPERTIES; THERMOCHEMICAL PROCESSES; TRANSITION ELEMENT COMPOUNDS 010405* -- Coal, Lignite, & Peat-- Hydrogenation & Liquefaction; 010600 -- Coal, Lignite, & Peat-- Properties & Composition

Citation Formats

Whitacre, T. P., Hunt, T. J., and Kneller, W. A. Characterization of selected Ohio coals to predict their conversion behavior relative to 104 North American Coals. [Factors correlating with liquefaction behavior]. United States: N. p., 1982. Web. doi:10.2172/6754230.
Whitacre, T. P., Hunt, T. J., & Kneller, W. A. Characterization of selected Ohio coals to predict their conversion behavior relative to 104 North American Coals. [Factors correlating with liquefaction behavior]. United States. doi:10.2172/6754230.
Whitacre, T. P., Hunt, T. J., and Kneller, W. A. Mon . "Characterization of selected Ohio coals to predict their conversion behavior relative to 104 North American Coals. [Factors correlating with liquefaction behavior]". United States. doi:10.2172/6754230. https://www.osti.gov/servlets/purl/6754230.
@article{osti_6754230,
title = {Characterization of selected Ohio coals to predict their conversion behavior relative to 104 North American Coals. [Factors correlating with liquefaction behavior]},
author = {Whitacre, T. P. and Hunt, T. J. and Kneller, W. A.},
abstractNote = {Twenty-six coal samples from Ohio were collected as washed and seam samples, and lithobodies within the seams. Characterization of these samples included determination of % maceral, % anti R/sub max/, LTA, chlorine content and proximate/ultimate and qualitative mineral analyses. These data were compared to data from a similar project by Yarzab, R.F., et al., 1980 completed at Pennsylvania State University using tetralin as the hydrogen donor solvent. The characteristics of these coals were correlated with liquefaction conversion and other data accrued on 104 North American coals by statistical analyses. Utilizing percent carbon, sulfur, volatile matter, reflectance, vitrinite and total reactive macerals, Q-mode cluster analysis demonstrated that Ohio coals are more similar to the coals of the Interior province than to those of the Appalachian province. Linear multiple regression analysis for the 104 North American coals provided a prediction equation for conversion (R = .96). The predicted conversion values for the samples range from 58.8 to 79.6%, with the Lower Kittanning (No. 5) and the Middle Kittanning (No. 6) coal seams showing the highest predicted percent conversion (respectively, 73.4 and 72.2%). The moderately low FSI values for the No. 5 and No. 6 coals (respectively, 2.5 and 3) and their moderately high alkaline earth content (respectively, 0.69 and 0.74%) suggest that these coals possess the best overall properties for conversion. Stepwise regression has indicated that the most important coal characteristics affecting conversion are, in decreasing order of importance: % volatile matter, % vitrinite and % total sulfur. Conversion processes can be expected to produce higher yields with Ohio coals due to the presence of such mineral catalysts as pyrite and kaolinite. It is believed that the presence of these disposable catalysts increases the marketability of Ohio coals.},
doi = {10.2172/6754230},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Feb 01 00:00:00 EST 1982},
month = {Mon Feb 01 00:00:00 EST 1982}
}

Technical Report:

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  • The value of the products of liquefying coals obviously depends on their composition. Accordingly, this work sought to determine key compositional features of products from the liquefaction of coals, and to establish, to the extent possible, the principles relating liquid composition to the characteristics of the coals used as feedstocks. A well-characterized set of bituminous coal samples was selected, which included six rich in vitrinite, two rich (>50%) in algal remains, and nine concentrates of macerals from British coals. Most of the samples were characterized by FTIR spectroscopy and the aromaticities determined by /sup 13/C NMR. The coals were liquefiedmore » in tubing bomb reactors in tetralin under hydrogen (1400 psi, 9.7 MPa) at 400/sup 0/C for 1 hour. The hexane-soluble products were fractionated by desorption column chromatography on alumina into five fractions: (1) alkanes, (2) aromatic hydrocarbons, (3) neutral heteroatomic compounds, (4) bases and conjugated ketones, and (5) phenolic and other polar materials. The fractions were analyzed by gas chromatography/mass spectrometry. Regeneration of single ion chromatograms was found to be a powerful technique for determining key compositional features of these fractions. The hexane-soluble products from all coals were quite similar qualitatively, but differed widely in quantitative distributions. Among the aromatic hydrocarbons, homologs of biphenyl, diphenyl-methane, naphthalene and polycyclic structures were common, but extensive homologous series of long-chain alkyl-naphthalenes dominated the distribution from several coals. Other results are detailed.« less
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  • Characterization of the 19 coals in the sample set was completed. These coals, representing seven of Alaska's coal fields, range in rank from lignite to HVA Bituminous. Experimental work on the liquefaction of these coals in the presence of tetralin has continued. The lignite and subbituminous coals from Little Tonzona, Nenana, Beluga, and Yukon Flats coal fields were found to be exceptionally reactive under the conditions used. On a DAF basis, conversions to THF solubles plus gases were greater than 84%. The bituminous coal from the Matanuska coal field and the inertinite-rich coals from Northern Alaska and Chicago Creek weremore » considerably less reactive; conversion yields of these coals ranged from 55 to 82%. A good correlation was found between total conversion and volatile matter content (R/sup 2/ of .835). Evaluation of the distribution of liquefaction products indicated that the low rank coals produced predominantly an oil plus gas fraction and few asphaltenes and preasphaltenes. The less reactive coals produced relatively equal distributions of the three product classes. A Cape Beaufort coal, UA-139, was selected for evaluating the behavior of inert macerals. Using float sink techniques, macrinites were concentrated in the 1.4 to 1.6 specific gravity fraction, and fusinite was concentrated in the 1.6 specific gravity sink fraction. Semifusinite was equally distributed in both of these fractions. 9 refs., 10 figs., 4 tabs.« less
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