Actions for Analysis and characterization of chemically modified coal macerals using density gradient centrifugation

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Analysis and characterization of chemically modified coal macerals using density gradient centrifugation

Author
Dyrkacz, G. R.
Published
United States : [publisher not identified], 1985
Springfield, Va.: National Technical Information Service, [approximately 1985]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Choi, C. Y. and Stock, L. M.

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Summary
Changes brought about in coal macerals by mild, non-destructive reactions such as -0- alkylation can be monitored by using density gradient centrifugation. Large changes in maceral group densities have been observed when active hydroxyl groups of the original coal sample are alkylated with methyl or butyl groups. All three maceral groups exhibit a shift to lower densities. When single, pre-separated density fractions are alkylated and then examined by density gradient techniques, inertinite and exinite macerals show new multiple density bands developing. This suggests that different chemical domains or different macerals can be isolated from individual maceral groups. 6 refs., 4 figs.
Report Numbers
DE85013882; CONF-851003-7
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: W-31-109-ENG-38
OSTI Identifier 5474603
Research organization: Argonne National Lab., IL (USA).
Research organization: Chicago Univ., IL (USA). Dept. of Chemistry.
View MARC record | catkey: 47354628