Sulfur removal from high-sulfur Illinois coal by low-temperature perchloroethylene (PCE) extraction. Technical report, December 1, 1991--February 29, 1992

Abstract

A pre-combustioncoal desulfurizationprocess at 120_C using perchloroethylene (PCE)to remove up to 70_ of the organic sulfur has been developedby the Midwest Ore Processing Co (_OPC) However this processhas not _,:tproven to be as successful with illinois coals as 'it has for Ohio and ,,,dlanacoals, In addition, the high levels of organic sulfur removalsobserved by the MWOPC may be due to certain _rrors involved in the ASTM data interpretation;this needs verification. For example, elementalsulfur extractedby the PCEmay bP derived from pyrite oxidation during coal pre-oxidation,but lt may be interpretedas organic sulfur removed by the PCE using ASTM analysis.

Desulfurization of Illinois coals with hydroperoxides of vegetable oils and alkali. Final technical report, September 1, 1995--August 31, 1996

“…in situ formation of hydroperoxides, which are powerful oxidizing agents that can oxidize organic sulfiu and lead to coal detofication, 2. environmental safety of zero discharge; the oil need not be removed but can remain with the coal, and no noxious products will be formed, 3. increased volatiles; the oil will produce volatiles which will enhance the burning qualities of the treated coal, 4. increased hydrogen content; the high hydrogen content of the oils will be available to the coal, 5. increased BTU; the oils furnish carbon and hydrogen which will increase the heat content of the coal, 6. decreased costs; in pure form and truck load quantities these oils can be purchased for $0.28LB; however, in raw form and tank car quantities the price will be much less.…”

Desulfurization of Illinois coals with hydroperoxides of vegetable oils and alkali. Technical report, September 1--November 30, 1995

“…in situ formation of hydroperoxides, which are powerful oxidizing agents that can oxidize organic sulfur and lead to coal detoxification, 2. environmental safety of zero discharge; the oil need not be removed but can remain with the coal, and no noxious products will be formed, 3. increased volatiles; the oil will produce volatiles which will enhance the burning qualities of the treated coal, 4. increased hydrogen content; the high hydrogen content of the oils will be available to the coal, 5. increased BTU; the oils furnish carbon and hydrogen which will increase the heat content of the coal, 6. decreased costs; in pure form and truck load quantities these oils can be purchased for $0.28/LB; however, in raw form and tank car quantities the price will be much less.…”

Desulfurization of Illinois coals with hydroperoxides of vegetable oils and alkali, Quarterly report, March 1 - May 31, 1996

“…in situ formation of hydroperoxides, which are powerlid oxidizing agents that can oxidize organic sulibr and lead to coal detoxification, 2. environmental safety of zero discharge; the oil need not be removed but can remain with the coal, and no noxious products will be formed, 3. increased volatiles; the oil will produce volatiles which will enhance the burning qualities of the treated coal, 4, increased hydrogen content; the high hydrogen content of the oils will be available to the coal, 5. increased BTU; the oils furnish carbon and hydrogen which will increase the heat content of the coal, 6. decreased costs; in pure form and truck load quantities these oils can be purchased for $0.28/LB; however, in raw form and tank car quantities the price will be much less.…”