TABLE 7-4 DOE's Program Goals for Integrated Gasification-Based Systems

Technology Goals

Second-Generation Integrated Gasification Combined-Cyclea

Integrated Gasification Advanced-Cycle

Integrated Gasification Fuel Cell

Net efficiency, percent

45 (by 2000)

≥50 (by 2010)

≥60 (by 2010)

Emissions,

SO2

1/10

1/10

1/10

fraction of

NOx

1/10

1/10

1/10

NSPS

Particulates

Not specified

Not specified

Not specified

Air toxics emissions relative to 1990 Clean Air Act amendments

Meet

Meet

Meet

Solid wastes

Not specified

Not specified

Not specified

Capital cost, $/kW

1,200

1,050

1,100

Electricity cost compared to current pulverized coal

20 Percent lower

25 Percent lower

20 Percent lower

Commercial completion milestones

Demonstration 2001

Demonstration 2004

Coal demonstration 2000

Development status

Under development

Development initiated

Current activities focusing on natural gas-fired systems

a First-generation integrated gasification combined-cycle power systems are presently at the commercialization stage and are being demonstrated with design improvements in the CCT program.

Source: DOE (1993a).

First-generation IGCC plants have already demonstrated outstanding operability and environmental performance at commercial scale. The key issue for these technologies is the high capital cost and its impact on economic competitiveness.

Gasification is an enabling technology that allows the use of very high-efficiency energy conversion devices—such as high-temperature gas turbines and fuel cells—for power production in combined-cycle systems. Reductions in capital costs can be accomplished through process simplifications, economies of scale, and thermal efficiency improvements. With completion of the DOE CCT programs and the major European demonstration projects in the next five to six years, areas for continued improvements to the gasification technologies and IGCC process can be identified to reduce the capital cost and enhance the economic competitiveness.



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