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TABLE 2-1: Cost Estimates for Post-Combustion SOx and NOx Reduction Measures for the Utility and Industrial Sectors⁷

	Capital Costs (US$/kW)		Variable O&M Costs (US cents/kWh)		Total O&M Costs (US cents/kWh)
Technology	New	Retrofit	New	Retrofit	New	Retrofit
Pre-ESP Sorbent Injection	60 - 120
Post-ESP Sorbent Injection	100 - 200
Wet Scrubbers	120 - 210	150 - 270	.13 - .32	.15 - .33	.74 - 1.3	.66 - 1.2
Dry Scrubbers	110 - 165	140 - 210	.21 - .32	.21 - .32	.74 - 1.1	.60 - .90
Selective non-catalytic red.	5 - 10	10 - 20			.1 - .2
Selective catalytic reduction	50 - 150				.4 - .8
Combined NOx/SOx Control	300 - 400				1.0 - 1.8

From Technological Alternatives to Reduce Acid Gas and Related Emissions from Energy-Sector Activities in Northeast Asia by David Von Hippel

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