Correlative investigation of the effects of oxidation on the minerals, macerals and technological properties of coal

Journal Article · Thu Sep 01 00:00:00 EDT 1983 · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

OSTI ID:5574837

Lin, M C; Huggins, F E; Huffman, G P; Lowenhaupt, D E

Two high-volatile bituminous coals were used in long-term room-temperature oxidation treatments. The -60 mesh coals were placed in several 100 cc beakers and stored separately in dry, ambient and humid air atmospheres at room temperature for 950 days. Moessbauer spectroscopy shows that pyrite in coal is readily altered by low-temperature coal oxidation. The oxidation of the pyrite subjected to simulated weathering treatments at constant temperature and humidity in the laboratory produces a variety of iron sulfates. A reduction in intensity of aliphatic and aromatic bands with increasing oxidation of a strip-mined coal is detected in DRIFT spectra (Diffuse Reflectance Infrared Fourier Transform). These changes accompany the enhancement of intensity of certain carbonyl and carboxyl bands. However, these coals are still in the early stages of oxidation. The plastic properties of coal, as determined by plastometer measurements, are extremely sensitive to oxidation. The maximum fluidity shows a rapid reduction with oxidation. A significant narrowing of the plastic range is also apparent. 4 figures, 5 tables.

• Research Organization: US Steel Corp., Monroeville, PA
• OSTI ID: 5574837
• Report Number(s): CONF-830814-Vol.2
• Journal Information: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States), Vol. 28:5; Conference: 186. national meeting of the American Chemical Society, Washington, DC, USA, 28 Aug 1983
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
BITUMINOUS COAL
OXIDATION
PLASTICITY
STRUCTURAL CHEMICAL ANALYSIS
PYRITE
BENCH-SCALE EXPERIMENTS
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
HUMIDITY
INFRARED SPECTRA
MOESSBAUER EFFECT
SAMPLE PREPARATION
WEATHERING
BLACK COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
DATA
ENERGY SOURCES
FOSSIL FUELS
FUELS
INFORMATION
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MECHANICAL PROPERTIES
MINERALS
NUMERICAL DATA
SPECTRA
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
010600* - Coal
Lignite
& Peat- Properties & Composition