Environmental Technologies and Eco-innovation in the Czech ...

TABLE 4 | Comparing the specifications of subcritical units being used with the above
critical unit being built at the Ledvice power plant [MW, %, kg.MWh –1 , mg.m –3 ]
Indicator Existing sources New source
Output (electrical) [MW] 2 x 110 660
Gross efficiency [%] 37 47
Coal consumption [kg.MWh –1 ] 1 130 656
Specific emission of PM [kg.MWh –1 ] 0.09 0.06
Specific emission of SO 2 [kg.MWh –1 ] 5.01 0.41
Specific emission of NO x [kg.MWh –1 ] 2.11 0.55
Emission limit of PM [mg.m –3 ] 100 20
Emission limit of SO 2 [mg.m –3 ] 1 700 150
Emission limit of NO x [mg.m –3 ] 650 200
SOURCE | MoE
2.4.2 | Integrated gasification combined cycle
Power plants with an integrated gasification combined cycle are considered
the cleanest and the most effective methods for using coal. IGCC systems can be
optimised for various types of fuel, including coal, petroleum (oil), coke, biomass and
communal waste. During the process of IGCC, appropriate fuel is transformed into gas
with high hydrogen content. Then, the gas is used as fuel for combustion gas turbines.
Today’s energy efficiency of these power plants fluctuates between 40 and 45%. Future
combustion turbine research and other expected improvements will increase this
efficiency beyond 50%.
Comparison to previous types of pulverized coal power plants, these IGCC power
plants are more expensive and still require additional study. Their advantage, however,
lies in their following strict ecological limits.
2.5 | Technology for CO 2 capture and storage
Carbon capture and storage is a technology that has a potential to achieve high
reductions in the emissions of CO 2 . CCS can be applied anywhere that a large amount
of CO 2 is created, but it is supposed to find its primary use in energy. Manufacturing
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