Standard method of test for forms of sulfur in coal

Journal Article · Tue Jan 01 04:00:00 EST 1974 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:7081313

A standard method for the determination of sulfate, pyritic sulfur, and organic sulfur in coal samples is described in terms of apparatus, reagents and materials, procedure, and calculations. Sulfate sulfur is gravimetrically determined by extracting a weighed sample of coal with dilute hydrochloric acid followed by precipitation with barium chloride and weighing as barium sulfate. Pyritic sulfur is volumetrically determined by extracting a weighed sample of coal with dilute nitric acid followed by titrimetric determination of iron in the extract as a measure of pyritic sulfur. Organic sulfur is determined by subtracting the sum of sulfate sulfur and pyritic sulfur from the total sulfur. The repeatability of the method is within 0.02 percent for sulfate, 0.05 percent of pyritic sulfur (under 2 percent), and 0.10 percent for pyritic sulfur (2 percent or over). The reproducibility of the method is within 0.04 percent for sulfate; 0.30 percent for pyritic sulfur (under 2 percent), and 0.40 percent for pyritic sulfur (2 percent or over).

• OSTI ID: 7081313
• Journal Information: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States), Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Vol. 26; ISSN ASTTA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
ALKALINE EARTH METAL COMPOUNDS
BARIUM CHLORIDES
BARIUM COMPOUNDS
BARIUM SULFATES
CALCULATION METHODS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHLORIDES
CHLORINE COMPOUNDS
COAL
ELEMENTS
ENERGY SOURCES
EQUIPMENT
FOSSIL FUELS
FUELS
GRAVIMETRIC ANALYSIS
HALIDES
HALOGEN COMPOUNDS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IRON
MATERIALS
METALS
MINERALS
NITRIC ACID
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PYRITES
QUANTITATIVE CHEMICAL ANALYSIS
REAGENTS
SULFATES
SULFIDES
SULFUR
SULFUR COMPOUNDS
TESTING
TITRATION
TRANSITION ELEMENTS
VOLUMETRIC ANALYSIS