p.1 

OAR Box 1828 

Prepped by Ollie Stewart 

Document Number: 

149) M-K-(B)-148 

Docket Number: 

A-83-27 

Printed 11/12/2008 11:12:53 AM Sheet 149 of 325 
P.2 

ENERGY AND ENVIRONMENTAL ANALYSIS, INC. 

tr- '• 1 

1655 NORTH FORT MYER DRIVE ARLINGTON, VIRGINIA 22209 703/528-1900 

August 14, 1984 

_C_3 

II-K-CB)-ltf8 

Mr. Robert Short 

Economic Analysis Branch 

U.S. Environmental Protection Agency 

Mail Drop-12 

Research Triangle Park, NC 27711 

Subject: EPA Contract No. 68-02-3564, Work Assignment #19 

Dear Robert: 

Sodium (NaTH) scrubbing was selected in the fifth round SO- NSPS 

IFCAM runs. For sensitivity analysis purposes, two cases from the fifth 

round SO- NSPS analysis have been run in IFCAM with dual alkali scrubbing. 

The dual alkali scrubber capital costs are twice (or more) the cost 

estimates for NaTH. The dual alkali 0§M cost estimates are comparable 

to (i.e., for high sulfur coal types) or higher than NaTH. Therefore, 

dual alkali scrubbing is more expensive than NaTH. The attached tables 

show that less coal is selected when scrubbing is restricted to dual 

alkali FGD systems. 

For Option Case 7(90) and new units >200 MMBtu/hr, the aggregate 

SO- emissions are slightly higher for the case with scrubbing restricted 

to dual alkali scrubbers (even though coal demand is lower). When 

scrubbing is restricted to dual alkali systems in Option Case 7(90), a 

high sulfur coal is scrubbed in Federal region 4 (South Atlantic). 

Medium sulfur coal types are selected in this region when NaTH is 

permitted. As a result, the average controlled SO- emission rate for 

coal-fired boilers is higher under the DA/Option Case 7(90) run compared 

with the NaTH/Option Case 7(90) run. 

Please call me if you have any questions. 

Sincerely, 

Tim Hogan (J 

TH/ce 

Enclosures 

cc: Dr. A. Wehe 

MANAGEMENT / ECONOMICS / ENGINEERING 
COMPARISON OF IFCAM PROJECTIONS3 

117 

128 

117 

128 

0 

0 

0 

0 

12 

1 

12 

1 

1990 Fuel demand 1990 S09 Annualized 

12 (10 Btu) emissions Costs 

gas resid coal (IO3 short tons) (IO6 $ 1982) 

100-150 MMBtu/hr 

0.C.2 (50) 

NaTHb 117 0 12 3.8 1,010.6 

DCC 128 0 1 0.3 1,008.2 

0.C.7 (90) 

NaTHb 117 0 12 1.6 1,011.2 

DAC 128 0 1 0.1 1,008.3 

150-200 MMBtu/hr 

0.C.2 (50) 

NaTHb 88 0 23 7.1 832.1 

DAC 111 0 0 0.0 819.2 

0.C.7 (90) 

NaTHb 94 0 17 2.3 829.4 

DAC 111 0 0 0.0 819.2 

aNew industrial boilers installed between 1985 and 1990. Higher oil and gas prices. 

Fifth round S02 NSPS analysis results. Sodium scrubbing selected. 

cNaTH and lime spray drying FGD systems not permitted. Dual alkali scrubbing selected. 

88 

111 

94 

111 

0 

0 

0 

0 

23 

0 

17 

0 
, 

200-250 MMBtu/hr 

0.C.2 (50) 

NaTHb 

DAC 

0.C.7 (90) 

NaTHb 

DAC 

>250 MMBtu/hr 

0.C.2 (50) 

NaTHb 

DAC 

0.C.7 (90) 

NaTHb 

DAC 

aNew industrial boilers 

bFifth round S02 NSPS 

cNaTH and lime spray 

-

ins 

i analy 

dry ing 

gas 

50 

54 

50 

54 

90 

125 

90 

125 

tailed 

COMPARISON OF IFCAM PROJECTIONS9 

1990 Fuel 

(IO12 

resid 

0 

0 

0 

0 

0 

0 

0 

0 

demand 1990 S0o 

3tu) 

_ 

emissions 

o 

coal (10 short tons) 

17 5.2 

13 4.4 

17 2.4 

13 2.6 

101 29.5 

66 21.4 

101 9.7 

66 10.9 

between 1985 and 1990. Higher oil and gas 

sis results. Sodium 

FGD systems not 

scrubbing selected. 

permitted. Dual alkali scrubbing 

prices. 

selected. 

Annualized 

Costs 

(IO6 $ 1982) 

500.4 

501.3 

501.1 

501.6 

1,411.1 

1,401.8 

1,415.0 

1,403.4 

* 

4-

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