Standard method of test for forms of sulfur in coal. [Sulfate sulfur, pyritic sulfur, and organic sulfur]
Methods are described for the determination of the three commonly recognized forms of sulfur in coal: sulfate sulfur, pyritic sulfur, and organic sulfur. Sulfate sulfur is determined by extracting a weighed sample of coal with dilute hydrochloric acid followed by precipitation of the sulfate with barium chloride and weighing as barium sulfate. Pyritic sulfur is determined by extracting a weighed sample with dilute nitric acid followed by titrimetric determination of iron in the extract. The dilute nitric acid oxidizes ferrous iron to ferric and sulfide sulfur to sulfate, both of which are soluble in HNO/sub 3/. Organic sulfur is determined by subtracting the sum of sulfate sulfur and pyritic sulfur from total sulfur as determined according to ASTM Method D3177. (BLM)
- OSTI ID:
- 7344315
- Journal Information:
- Annu. Book ASTM Stand.; (United States), Journal Name: Annu. Book ASTM Stand.; (United States) Vol. 26; ISSN ASTSA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Standard test method for forms of sulfur in coal
Removal of pyritic sulfur from coal
Related Subjects
010600* -- Coal
Lignite
& Peat-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
COAL
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON COMPOUNDS
IRON SULFIDES
MINERALS
NONMETALS
ORES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PRECIPITATION
PYRITE
PYRITES
SEPARATION PROCESSES
STANDARDS
SULFATES
SULFIDES
SULFUR
SULFUR COMPOUNDS
SULFUR ORES
TITRATION
TRANSITION ELEMENT COMPOUNDS