CO(2), CO, and Hg emissions from the Truman Shepherd and Ruth Mullins coal fires, eastern Kentucky, USA.

Carbon dioxide (CO(2)), carbon monoxide (CO), and mercury (Hg) emissions were quantified for two eastern Kentucky coal-seam fires, the Truman Shepherd fire in Floyd County and the Ruth Mullins fire in Perry County. This study is one of the first to estimate gas emissions from coal fires using field measurements at gas vents. The Truman Shepherd fire emissions are nearly 1400t CO(2)/yr and 16kg Hg/yr resulting from a coal combustion rate of 450-550t/yr. The sum of CO(2) emissions from seven vents at the Ruth Mullins fire is 726+/-72t/yr, suggesting that the fire is consuming about 250-280t coal/yr. Total Ruth Mullins fire CO and Hg emissions are estimated at 21+/-1.8t/yr and >840+/-170g/yr, respectively. The CO(2) emissions are environmentally significant, but low compared to coal-fired power plants; for example, 3.9x10(6)t CO(2)/yr for a 514-MW boiler in Kentucky. Using simple calculations, CO(2) and Hg emissions from coal-fires in the U.S. are estimated at 1.4x10(7)-2.9x10(8)t/yr and 0.58-11.5t/yr, respectively. This initial work indicates that coal fires may be an important source of CO(2), CO, Hg and other atmospheric constituents.

[1]  Robert B. Finkelman,et al.  U.S. Geological Survey coal quality (COALQUAL) database; version 2.0 , 1997 .

[2]  Daniel H. Vice,et al.  Looking back at the Centralia coal fire: a synopsis of its present status , 2004 .

[3]  D. J. Akers,et al.  Mercury concentration in coal—unraveling the puzzle , 1999 .

[4]  James C. Hower,et al.  The Tiptop coal-mine fire, Kentucky: Preliminary investigation of the measurement of mercury and other hazardous gases from coal-fire gas vents , 2009 .

[5]  D. Blake,et al.  New mineral occurrences and mineralization processes: Wuda coal-fire gas vents of Inner Mongolia , 2005 .

[6]  D. D. Vleeschouwer,et al.  Geological Society of America Abstracts with Programs , 2010 .

[7]  Rex Klopfenstein,et al.  Air velocity and flow measurement using a Pitot tube , 1998 .

[8]  Harold J. Annegarn,et al.  The spontaneous combustion of coal and its by-products in the Witbank and Sasolburg coalfields of South Africa , 2007 .

[9]  K. Kazahaya,et al.  Mass and heat flux of volcanic gas discharging from the summit crater of Iwodake volcano, Satsuma-Iwojima, Japan, during 1996–1999 , 2003 .

[10]  The anthracite smokers of eastern pennsylvania: $$P_{S_2 (g)} $$ -T stability diagram by TL analysis , 1995 .

[11]  Glenn B. Stracher,et al.  Coal fires burning out of control around the world : Thermodynamic recipe for environmental catastrophe , 2004 .

[12]  Claudia Künzer,et al.  Integrating satellite remote sensing techniques for detection and analysis of uncontrolled coal seam fires in North China , 2004 .

[13]  Edward L. Heffern,et al.  Geologic history of natural coal-bed fires, Powder River basin, USA , 2004 .

[14]  Vincent R. Gray.  Climate Change 2007: The Physical Science Basis Summary for Policymakers , 2007 .

[15]  C. Ellyett,et al.  Thermal infrared imagery of The Burning Mountain coal fire , 1974 .

[16]  David J. Williams,et al.  Greenhouse gas emissions from low-temperature oxidation and spontaneous combustion at open-cut coal mines in Australia , 2009 .

[17]  Yang Li,et al.  Trace element emissions from spontaneous combustion of gob piles in coal mines, Shanxi, China , 2008 .