Analysis and optimization of CO2 capture in an existing coal-fired power plant in China

Efficiency improvements for the coal-fired power plant retrofit with CO 2 capture plant using chilled ammonia process

“…As the heat duty of the reboiler is of a significant magnitude, it can be expected that a large fraction of the IP/LP crossover steam will be extracted. Such reduction in the existing LP turbine throughput will cause it to operate in off-design mode due to pressure drop upstream of the extraction point [57]. To account for the pressure loss in the turbine, new extraction pressures for feedwater heating are approximated using the Stodola ellipse law.…”

Economic evaluations of coal-based combustion and gasification power plants with post-combustion CO 2 capture using calcium looping cycle

“…The technical evaluations underline the fact that for PF power plants, post-combustion capture using calcium looping would be a preferable solution compared to chemical gaseliquid absorption which has an energy penalty of at least 10 net electricity percentage points and the carbon capture rate is a bit lower (in the range of 85e90%) [19,20]. This lower energy penalty for calcium looping method can be explained by a combination of two factors: significantly lower energy consumption for sorbent regeneration compared to solvent regeneration and the high temperature heat recovery potential (as suggested from Fig.…”

Study on heat integration of supercritical coal-fired power plant with post-combustion CO2 capture process through process simulation

“…In this way, all of the low-pressure condensate heaters are removed, and a throttling valve (V1 in Fig. 7) is added at the steam extraction location to ensure the plant's stability [35]. The solvent regeneration temperature in the reboiler of the capture plant is 120°C, meaning that hot steam used to heat the reboiler should be 130°C with 10°C mean temperature difference-that is to say that steam of 2.7 bar is required for solvent regeneration.…”