Selective exhaust gas recirculation in combined cycle gas turbine power plants with post-combustion CO2 capture

Herraiz, Laura; Fernández, Eva Sánchez; Palfi, Erika; Lucquiaud, Mathieu

doi:10.1016/j.ijggc.2018.01.017

Cited by 47 publications

(63 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…O 2 at the inlet of the combustor, as required for stable combustion . Herraiz also investigated these systems, calculating a CO 2 concentration in the flue gas entering the capture plant of 18.7%vol. for the parallel configuration, and between 6.7 and 12.9%vol.…”

Section: Post‐combustion Co2 Capture In Gas‐fired Systemsmentioning

confidence: 99%

“…for the parallel configuration, and between 6.7 and 12.9%vol. for the series system, whilst ensuring in both cases the O 2 levels at the inlet of the combustor are well above 16%vol . However, the actual values of CO 2 content achieved in each configuration will vary depending on the CO 2 capture efficiency of the selective membrane and the capture unit (which determine the overall capture efficiency), and also on the S‐EGR ratio allowed for the parallel configuration, defined as the ratio between the volume of gas treated in the selective membrane and the total volume of flue gas.…”

Section: Post‐combustion Co2 Capture In Gas‐fired Systemsmentioning

confidence: 99%

“…The potential advantages of S‐EGR are promising, leading to a reduction in packing volume and reboiler duty of the capture plant . However, the actual benefits will depend on a number of factors, notably, economic and technical issues.…”

Section: Post‐combustion Co2 Capture In Gas‐fired Systemsmentioning

confidence: 99%

“…The potential advantages of S-EGR are promising, leading to a reduction in packing volume and reboiler duty of the capture plant. 24 However, the actual benefits will depend on a number of factors, notably, economic and technical issues. These include how S-EGR influences NGCC plant performance in terms of net power output and efficiency, effects on the turbomachinery, CAPEX, OPEX, upscale feasibility and commercial viability of this process.…”

Section: Selective Exhaust Gas Recirculationmentioning

confidence: 99%

“…This, in turn, can result in significant energy and cost reductions -particularly in the capital and operational expenditure (CAPEX and OPEX) -and contribute to the deployment of gas-CCS. For this purpose, modifications to existing systems, alternative processes and new configurations have been proposed, including the use of supplementary firing, 8,[12][13][14]20,21 exhaust gas recirculation, 8,15,16,22,23 selective exhaust gas recirculation, 17,24 and humidified cycles. 8,[17][18][19][25][26][27][28] Also, advancements have been made for the development of oxy-fired gas turbine cycles, 15,[29][30][31][32][33][34] which are seen as a potential alternative to post-combustion capture systems.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Making gas‐CCS a commercial reality: The challenges of scaling up

et al. 2017

View full text Add to dashboard Cite

Significant reductions in CO 2 emissions are required to limit the global temperature rise to 2°C. Carbon capture and storage (CCS) is a key enabling technology that can be applied to power generation and industrial processes to lower their carbon intensity. There are, however, several challenges that such a method of decarbonization poses when used in the context of natural gas (gas-CCS), especially for solvent-based (predominantly amines) post-combustion capture. These are related to: (i) the low CO 2 partial pressure of the exhaust gases from gas-fired power plants (ß3-4%vol. CO 2 ), which substantially limits the driving force for the capture process; (ii) their high O 2 concentration (ß12-13%vol. O 2 ), which can degrade the capture media via oxidative solvent degradation; and (iii) their high volumetric flow rates, which means large capture plants are needed. Such post-combustion gas-CCS features unavoidably lead to increased CO 2 capture costs. This perspective aims to summarize the key technologies used to overcome these as a priority, including supplementary firing, humidified systems, exhaust gas recirculation and selective exhaust gas recirculation. These focus on the maximum CO 2 levels achievable for each, as well as the electrical efficiencies attainable when the capture penalty is taken into account. Oxy-turbine cycles are also discussed as an alternative to post-combustion gas-CCS, indicating the main advantages and limitations of these systems together with the expected electrical efficiencies. Furthermore, we consider the challenges for scaling-up and deployment of these technologies at a commercial level to enable gas-CCS to play a crucial role in a low-carbon future. C

show abstract

Section: Post‐combustion Co2 Capture In Gas‐fired Systemsmentioning

confidence: 99%

Section: Post‐combustion Co2 Capture In Gas‐fired Systemsmentioning

confidence: 99%

Section: Post‐combustion Co2 Capture In Gas‐fired Systemsmentioning

confidence: 99%

Section: Selective Exhaust Gas Recirculationmentioning

confidence: 99%