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Studies in coal liquefaction with application to the SRC and related processes. Quarterly report, November 1982-January, 1983

Author
Tarrer, A. R.
Published
United States : [publisher not identified], 1983
Springfield, Va.: National Technical Information Service, [approximately 1983]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Curtis, C. W. and Guin, J. A.

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Summary
This report examines the amount of transferable hydrogen (H/sub D/) in coal liquefaction solvents as one of the most important parameters in determining the effectiveness of the solvents in direct coal liquefaction processes. Methods for determining H/sub D/ utilizing /sup 13/C-nmr, /sup 1/H-nmr and catalytic solvent dehydrogenation (CSD) have been applied to a series of hydrogenated creosote oils and light recycle oils. Results have been correlated with the dissolution abilities of the solvents. The removal of chemical species which interfere with the analytical techniques used to measure H/sub D/ was accomplished by high performance liquid chromatography. The resulting product fractions included saturates, aromatics, polar compounds and n-hexane insolubles. Estimations of the amounts of H/sub D/ in the coal liquids were obtained using the /sup 13/C-nmr analyses of the original whole oils and their aromatic fractions. H/sub D/ estimated by /sup 1/H-nmr gave similar results to those found using /sup 13/C-nmr. CSD reactions utilizing the aromatic fractions of the coal liquids produced significant quantities of hydrocarbon gases in addition to molecular hydrogen. H/sub D/ estimated based on the hydrogen evolved showed good agreement with the /sup 13/C-nmr results utilizing a 22-31 ppM hydroaromatic window. Preliminary studies examining the effect of solvents on the product distribution in coal liquefaction reactions indicate that solvents may be an important factor in determining product selectivity. Temperature programming of coal liquefaction reactions, as opposed to maintaining the reaction temperature constant for the duration of the reaction, appears to have minimal effects on the resulting product distributions. However, only one solvent (tetralin) was examined in this study.
Report Numbers
DE84004991; DOE/ET/13397-17
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AC22-79ET13397
OSTI Identifier 5434367
Research organization: Auburn Univ., AL (USA). Coal Conversion Lab.
View MARC record | catkey: 47337814