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By Prof Stephen Ansolabehere et al
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Additional info for The Future of Coal
Particulate control by ESP or fabric ﬁlter included in the base unit costs e. Range is for retroﬁts and depends on coal type, properties, control level and local factors f. 78 ¢/kWe-h or about 20% of the total COE from a highlycontrolled PC unit. Although mercury control is not explicitly addressed here, removal should be in the 60-80% range for bituminous coals, including Illinois #6 coal, and less for subbituminous coals and lignite. 4). The total cost of emissions control is still less than 25% of the cost of the electricity produced.
This conclusion holds even for plausible levels of expansion of nuclear power or for policies stimulating the other approaches to emissions mitigation listed at the outset of this chapter. CONCLUDING OBSERVATIONS A central conclusion to be drawn from our examination of alternative futures for coal is that if carbon capture and sequestration is successfully adopted, utilization of coal likely will expand even with stabilization of CO2 emissions. S. 24 58 40 28 25 13 China 27 88 39 24 31 17 Global CO2 Emissions 24 62 28 32 26 29 CO2 Emissions from Coal 9 32 5 9 3 6 Coal Use: Global Assumes universal, simultaneous participation, High CO2 prices and EPPA-Ref gas prices.
The absorbed CO2 must then be stripped from the amine solution via a temperature increase, regenerating the solution for recycle to the absorption tower. The recovered CO2 is cooled, dried, and compressed to a supercritical fluid. It is then ready to be piped to storage. CO2 removal from flue gas requires energy, primarily in the form of low-pressure steam for the regeneration of the amine solution. This reduces steam to the turbine and the net power output of the generating plant. Thus, to maintain constant net power generation the coal input must be increased, as well as the size of the boiler, the steam turbine/generator, and the equipment for flue gas clean-up, etc.
The Future of Coal by Prof Stephen Ansolabehere et al