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

Conference · Fri Jan 01 04:00:00 EST 1988 · Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; (USA)

OSTI ID:5340139

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

---

1. Tennessee Technological Univ., Cookeville (USA)

Based upon the authors' previous research in which the variable oxidizing power of perchloric acid (HC10{sub 4}) was used to determine directly the organic sulfur in coal, it was hoped that this property of HC10{sub 4} could be also used to determine different forms of organic sulfur in coal. This preliminary investigation into the usage of HC10{sub 4} to delineate between various organic sulfur forms was based on model compounds. Dibenzothiophene, benzothiophene, diphenyl sulfide, 2-naphthalenethiol, dibenzyl disulfide, and dioctyl sulfide were oxidized in a Bethge apparatus with HC10{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 HC10{sub 4} solution and in the peroxide trap. No appreciable amount of sulfate was measured for the aromatic compounds until a temperature of 170 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.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5340139
• Report Number(s): CONF-8806313--
• Conference Information: Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; (USA) Journal Volume: 33:1
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
AROMATICS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COAL
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PERCHLORIC ACID
PERFORMANCE TESTING
POLYCYCLIC SULFUR HETEROCYCLES
SULFATES
SULFIDES
SULFUR COMPOUNDS
TEMPERATURE DEPENDENCE
TESTING