Postcombustion capture

Natural gas combined cycle power plants with highest efficiencies (NCCC) and pre-and postcombustion capture of COj. 

Figure 9.1 Basic schematic diagram of (a) postcombustion capture, (b) precombustion decarbonization, and (c) oxy-fuel processes.

Postcombustion Capture Processes with Membrane Separation... 

Postcombustion capture In this case, the CO2 is separated from the flue gas emitted after the combustion of fossil fuels (from a standard gas turbine combined cycle or a coal-fired steam power plant). CO2 separation is realized at relatively low temperature, from a gaseous stream at atmospheric pressure, and with low CO2 concentration (ca. 5%-25% when air is used during combustion). SO2, NO2, and O2 may also be present in small amounts. 

Simplified versions of several energy conversion processes that use solvent-based H2S or CO2 capture, with optional design pathways shown, (a) IGCC [3] (b) GTL [11] (c) CTL [11,12] (d) PC Power [3] (e) NGCC with postcombustion capture [3] (f) NGCC with precombustion capture,or H2 production [13,14]. 

Application Postcombustion Postcombustion Postcombustion Capture Capture... 

Postcombustion capture (PCC) Bum the fuel in air then capture CO2 from the combustion products. 

It should be noted that, similarly to other studies in the field, CO2 is systematically considered as the fast permeating species for polymeric membrane simulations. In fact, apart from a very specific observation, no polymeric material has been reported with N2 permeating faster than CO2. The decisive advantages that a nitrogen selective material would offer for CO2 postcombustion capture have been discussed on a theoretical basis. 

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