Trace element content of cleaned Illinois basin coal

Journal Article · Tue Dec 31 04:00:00 EST 1996 · Preprints of Papers, American Chemical Society, Division of Fuel Chemistry

OSTI ID:420504

Katrinak, K A; DeWall, R A; Timpe, R C ^[1]

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1. Univ. of North Dakota, Grand Forks, ND (United States)

Illinois Basin coal samples treated to extract organic sulfur and selected hazardous air pollutants (HAPs) were examined for trace metal content using scanning electron microscopy with wavelength-dispersive spectrometry (SEM-WDS). The extraction process used subcritical water, defined as water held in the liquid state under sufficient pressure to remain liquid at temperatures greater than the normal boiling point, but below the supercritical point of water (218 atm and 374{degrees}C). The samples were sink-floated to remove pyrite prior to receiving the subcritical extraction treatment. Some mineral matter remains in the coal, including sulfates, aluminosilicates, and small amounts of pyrite. In individual mineral grains in the unextracted coal, mercury is found intermittently at levels up to 0.62 wt%, arsenic at up to 0.28 wt%, and selenium at up to 0.38 wt%. These occurrences appear to be localized concentrations.

• OSTI ID: 420504
• Report Number(s): CONF-960807--
• Journal Information: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry, Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry Journal Issue: 3 Vol. 41; ISSN 0569-3772; ISSN ACFPAI
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
BITUMINOUS COAL
CHEMICAL ANALYSIS
CLEANING
COAL PREPARATION
DESULFURIZATION
EXTRACTION
ILLINOIS BASIN
MERCURY
POLLUTANTS
PYRITE
SELENIUM
SEPARATION PROCESSES
SULFATES