Trace Elements in Coal - Modes of Ocurrence Analysis.
The objective is to provide modes of occurrence information for the CQ Inc. (CQ) effort being performed under DOE Contract entitled HAPs-Rx: Precombustion Removal of Hazardous Air Pollutant Precursors. This work attempts to provide semi-quantative date on modes of occurrence of 15 elements. Coals investigated include as-mined coals and cleaned fines from the Northern Appalachian and Southern Application, and Eastern Interior regions, and as-mined and natural fines from the Powder River Basin. Study techniques include scanning electron microscopy, electron micropole analysis, and leaching procedures. Microprobe data analysis indicate that pyrite grains in Northern Appalachian and Eastern Interior, and Powder River Basin coals and most of the pyrite grains of the Southern Appalachian coal contain low As concentrations, generally in the 100-500 ppm range. However, the Southern Appalachian coal contains some pyrite grains with much higher As contents, in excess of 4.0 wt. percent As. Micropole analyses and data from leaching experiments indicate that arsenic is primarily associated with pyrite in the bituminous coals. These techniques also indicate that Cr is primarily associated with illite. Other HAP`s elements have multiple associations.
- Research Organization:
- Minerals Management Service, Reston, VA (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
- DOE Contract Number:
- AI22-95PC95156
- OSTI ID:
- 644624
- Report Number(s):
- DOE/PC/95156--04; ON: DE98054319; CNN: DE-AI22-95PC95156
- Country of Publication:
- United States
- Language:
- English
Similar Records
Trace elements in coal - model of occurrence analysis
Quantifying the modes of occurrence of mercury in coal using a selective leaching procedure
Arsenic variation in pyrite in coal
Technical Report
·
Sat Jun 21 00:00:00 EDT 1997
·
OSTI ID:600583
Quantifying the modes of occurrence of mercury in coal using a selective leaching procedure
Conference
·
Thu Jul 01 00:00:00 EDT 1999
·
OSTI ID:20082350
Arsenic variation in pyrite in coal
Conference
·
Wed Dec 30 23:00:00 EST 1998
·
OSTI ID:349266