The conversion of organic sulfur in coal to sulfate using perchloric acid

Conference · Wed Jun 01 04:00:00 EDT 1988 · Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States)

OSTI ID:6778892

McGowan, C W; Cates, K Q ^[1]; Markuszewski, R ^[2]

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1. Dept. of Chemistry, Tennessee Technological Univ., Cookville, TN (US)
2. Ames Lab., Iowa State Univ., Ames IA (US)

Based upon the author's previous research in which the variable oxidizing power of perchloric acid (HCl0/sub 4/) was used to determine directly the organic sulfur in coal, it was hoped that this property of HCl0/sub 4/ could be also used to determine different forms of organic sulfur in coal. This preliminary investigation into the usage of HCl0/sub 4/ to delineate between various organic sulfur forms was based on model compounds. Dibenzothiophene, benzothiophene, diphenyl sulfide, 2-napththalenethiol, dibenzyl disulfide, and dioctyl sulfide were oxidized in a Bethge apparatus with HCl0/sub 4/ of varying concentration and boiling point. To insure complete sulfur recovery, gases produced during the reaction were captured in a trap containing hydrogen peroxide. Sulfate was then measured nephelometrically, after precipitation as barium sulfate, in the residual HCl0/sub 4/ solution and in the peroxide trap. No appreciable amount of sulfate was measured for the aromatic compounds until a temperature of 170/sup 0/C or higher was reached. However, for dibenzyl disulfide and dioctyl sulfide, large amounts of sulfate were measured in the trap, even at lower temperatures. The volatility of these two compounds may be a contributing factor in their high conversion to sulfate.

• OSTI ID: 6778892
• Report Number(s): CONF-8806136-
• Conference Information: Journal Name: Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States) Journal Volume: 33:1
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
CONVERSION
ELEMENTS
ENERGY CONVERSION
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MATERIALS
NONMETALS
OXYGEN COMPOUNDS
PERCHLORIC ACID
RECOVERY
SULFATES
SULFUR
SULFUR COMPOUNDS
SULFUR CONTENT