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Carbonyl sulfide/carbon chemistry: (Final report)

Technical Report ·
OSTI ID:7231109
This study examined the effects of treating isotropic char, coal tar, and coal with carbonyl sulfide, OCS. The substrates were treated with moderate pressures of OCS at 400-550/sup 0/C for several hours. Gas chromatographic analyses showed that the autoclave gases contained CO, CO/sub 2/, H/sub 2/S, and unreacted OCS as the principal components after reaction. The predominant reaction was the decomposition of OCS to CO and S. Sulfur percentages for all of the treated substrates were increased by 10% or more. Polarized light reflectance microscopy showed that anisotropic carbon (mesopase) was present in coal samples treated with sulfur gases. The study demonstrates that OCS is a potent resulfurization agent for all of the substrates examined. Cabonyl sulfide and hydrogen sulfide, included in the study for comparison, facilitate the formation of mesophasic structures in the coal studied. 9 refs., 6 figs., 12 tabs.
Research Organization:
Southern Illinois Univ., Carbondale (USA). Dept. of Chemistry and Biochemistry; Illinois State Geological Survey, Champaign (USA)
DOE Contract Number:
FC22-83FE60339
OSTI ID:
7231109
Report Number(s):
DOE/FE/60339-T44; ON: DE87002935
Country of Publication:
United States
Language:
English