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Technology-Specific Mercury Emissions from Coal Combustion by U.S. County of Origin. Jeffrey C Quick, Utah Geological Survey http://geology.utah.gov/emp/mercury/index.htm Sara Pletcher, Project Manager National Energy Technology Laboratory Geological Society of America, Annual Meeting

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slide1

Technology-Specific Mercury Emissions from Coal Combustion by U.S. County of Origin

Jeffrey C Quick, Utah Geological Survey

http://geology.utah.gov/emp/mercury/index.htm

Sara Pletcher, Project Manager

National Energy Technology Laboratory

Geological Society of America, Annual Meeting

Salt Lake City, Utah

16-19 October 2005

This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. 

slide2

Coal Data

25,825 records ICR 2 data (1999)

<epa.gov/ttn/atw/combust/utiltox/utoxpg.html>

19,507 records FERC 423 data (1999)

<eia.doe.gov/cneaf/electricity/page/ferc423.html>

5,823 records FERC 580 data (1992 to 1999)

<eia.doe.gov/cneaf/coal/ctrdb/database.html>

5,059 records COALQUAL data (1973 to 1989)

Bragg, L.J., and others 1997, U.S. Geological Survey Open File Report 97-134.

1,342 records MSHA data (1999)

<http://www.msha.gov/STATS/PART50/P50Y2K/A&I/1999/caim1999.exe>

73 records DOE-PSU data (1985 to 1995)

Davis, A., and Glick, D.C., 1993, U.S. DOE contract DE-RP22-87PC79997

Scaroni, A.W., and others, 1999, U.S. DOE contract DE-AC22-93PC93051

slide3

Utility Data

240 records ICR 3 data (1999)<epa.gov/ttn/atw/combust/utiltox/utoxpg.html>

SAIC 2003, Calculation of possible mercury MACT floor values for coal- fired utilities - influence of variability and approach. <netl.doe.gov/coal/E&WR/mercury/pubs/DOE_Report_v120803.pdf>

ENSR2003, Multivariable method to estimate the mercury emissions of the best-performing coal-fired utility units. <epa.gov/ttn/atw/combust/utiltox/final_ensr_multivar.pdf>

Roberson 2002, UARG variability analysis. <epa.gov/ttn/atw/combust/utiltox/epavarifnl.doc>

561 records CEA dataCanadian Electricity Association, <ceamercuryprogram.ca/EN/sampling_data.html> preliminary Oct. 2004 data

slide4

~

Mercury i

n

~

Mercury o

ut

Mercury i

n

Mercury o

ut

~

~

15

most units plot

near the 1:1 line !

10

Mercury Out Stack

(lbs per 1012 Btu)

Points show average

values for 67 pulverized

coal fired units (ICR 3

data).

5

Results for 4 units

where mercury is >15

12

lbs Hg per 10

Btu

are ignored.

0

0

5

10

15

Mercury in Coal

12

(lbs per 10

Btu)

slide5

Mercury Out Stack

(lbs Hg per 1012 Btu)

slide7

n

MercuryCapture

1,500

2,000

slide9

Sulfur in U.S. Coal

1999 FERC 423 data

slide10

Estimated % Hg capture, by coal origin

forunitswith cold ESP/FGD emissioncontrols

slide12

Estimated Hg emissions, by coal origin

forunitswith cold ESP/FGD emissioncontrols

19% of power plants in 1999

slide13

The New Cap-and-Trade

Clean Air Mercury Rule (CAMR)

2010: 38 ton cap

2018: 15 ton cap

States given tradable, mercury emission allowances in proportion to the amount of coal they burn, adjusted for coal rank

x 1 Bituminous,

x 1.25 Subbituminous

x 3 Lignite

slide14

Mercury capture varies with

Geologic Age - Not Coal Rank

All U.S. Coal

Cenozoic-Mesozoic Coal

% Mercury Capture

% Mercury Capture

Modified from: State of Utah comment to

EPA Docket: OAR-2002-0056-5411

slide15

Result of the CAMR Rank Adjustment (1):

target Hg emission rates depend on

where the coal is burned

Assumes no trading, no banking, and no change to the amount of coal burned

slide16

Result of the CAMR Rank Adjustment (2):

target % Hg capture further depends on

how much mercury is in the coal

Assumes no trading, no banking, and no change to the amount or quality of coal burned