Coal fired IGCC

Fig. 8.28 shows a similar plot for coal fired IGCC plant with and without CO2 removal (by extra shift reaction and CO2 removal at high pressure (Cycle FI)). 

Rezvani S, Huang Y, Mcllveen-Wright D, Hewitt N, Mondol ID (2009) Comparative assessment of coal fired IGCC systems with CO2 capture using physical absorption, membrane reactors and chemical looping. Fuel 88 2463-2472... 

There are several features of IGCC power systems that contribute to their improved thermal efficiency and environmental superiority compared to a conventional pulveriied-coal fired power plant. First, the... 

NGCC/GTCC, Natural gas combined cycle (often termed gas-turbine combined cycle) PC, Pulverized-coal-fired power plant IGCC, Integrated gasification combined cycle, Oxy-fuel (PC boiler) plant. Flue-gas desulfurization and air particulate control is included in the total cost, but not in the separation unit cost. 

A further inq)rovement for the conc.-COa-methanol path is the COa-recovery upstream the combustion after CO shift in an IGCC-plant with the selexol absorption process. This technology has a better COa balance than the pulverised coal fired plant with MEA-process technology due to the less decrease in IGCC efSciency from 42% (reference efSciency) to 36% only (after COa capture) [4] but it should be mentioned, that this technology is not state-of-the-art today. The efficiency of the air-COa-methanol vector was calculated to be 38.1%. With more advanced technologies (e.g. high temperature processes), the efSciency can be improved to more than 44% [6]. 

Huang, Y., S. Rezvani, D. Mcllveen-Wright, A. Minchener and N. Hewitt (2008) Techno-economic study of COj capture and storage in coal fired oxygen fed entrained flow IGCC power plants . Fuel Processing Technology, Vol. 89, No. 9, pp. 916-25. 

Each of these capture options has its particular benefits. Post-combustion capture and oxyfuel have the potential to be retrofitted to existing coal-fired power stations and new plants constructed over the next 10-20 years. Pre-combustion capture utilizing IGCC is potentially more flexible, opening up a wider range of possibilities for coal, including a major role in a future hydrogen economy. 

CLC technology is particularly suitable for coal-fired power plants because the reactor loop can be used in two different configurations. In the first case, the CLC occurs with syngas that is previously produced in a coal gasification plant and the power plant is designed as the typical IGCC so that the CLC is carried out at pressurized conditions, as already discussed for NGCC. In the second case, the CLC reactors can substitute the coal boiler and the OCs react with the solid fuel as proposed for the isG-CLC and the CLOU mechanisms. 

Natural gas fired combined cycle Coal-fired steam power plant IGCC... 

Technology for CO2 capture similar to post-combustion processes but smaller in size, potentially less expensive than post-combustion processes IGCC power plants applying this process are more efficient than pulverized coal-fired plants... 

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