Capture level design for a natural gas combined cycle with post-combustion CO2 capture using novel configurations

Díaz-Herrera, Pablo R.; Alcaráz-Calderón, Agustín M.; González‐Díaz, María Ortencia; González-Díaz, Abigail

doi:10.1016/j.energy.2019.116769

Cited by 13 publications

(4 citation statements)

References 17 publications

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“…This is because of the lower amount of flue gases to be treated in the PCC plant. Meanwhile, W regen and W pump presents similar values for both cases, which is due to optimization work done for sizing the absorber and stripper columns (Díaz-Herrera et al, 2020), which results in similar values in the reboiler duty and power consumption for solvent pumping, respectively. For example, the reboiler duty for NGCC and EGR cases is 3.76 and 3.74 MJ per kg of CO 2 desorbed, respectively.…”

Section: Resultsmentioning

confidence: 74%

“…On the other hand, the effect of the W regen on the efficiency of the CO 2 capture process was assessed in this study. Based on a previous simulation template built-in Thermoflex ™ (Díaz-Herrera et al, 2020), the mass flow of steam extracted from the NGCC to the reboiler varied from 100% (business-as-usual, BAU value) to 0% (thermodynamics limit), by steps of 10%. W fan and W pump were not assessed because their contribution to the W real is much lower than the solvent regeneration process (Wilcox, 2012;Lindqvist et al, 2014;Liu, 2020).…”

Section: Methodology Study Casesmentioning

confidence: 99%

“…(EIA, 2020; Natural Gas Prices, 2020) (see Supplementary Figure S1). • For all cases, the CAPEX, FOM, VOM, and, TCO 2 are obtained based on a previous work (Díaz-Herrera et al, 2020). The CAPEX and TCO 2 were updated from 2017 to 2022 using the Chemical Engineering Plant Cost Index (CEPCI) (ToweringSkills, 2022).…”

Section: Economic Indicatorsmentioning

confidence: 99%

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Cost projection of combined cycle power plants equipped with post-combustion carbon capture

Díaz-Herrera

Romero‐Martínez²,

Ascanio³

2022

Front. Energy Res.

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This work aims to analyze the cost projection of natural gas combined cycles (NGCC) with post-combustion carbon capture (PCC) technology for two promising power plant configurations, namely: conventional NGCC and exhaust gas recirculation (EGR). A thermo-economic analysis was performed considering the second-law efficiency for the CO2 separation process (η2nd) and the CO2 avoided cost (CAC) as main indicators. Several critical variables influencing the overall cost of the plant were considered, such as the work required for solvent regeneration (Wregen), technology maturity, learning rate, carbon tax credit, and carbon capture level (85%, 90%, and 95%). A hybrid method combining engineering-economic and experience-curve approaches was used to estimate the costs of Nth-of-a-kind (NOAK) plants. The results showed that NOAK plants could potentially decrease the levelized cost of electricity (LCOE) by 10%–11%, and the CAC by 21%–23%, compared with first-of-a-kind (FOAK) plants. EGR at 85% capture level showed the best economic performance among the study cases evaluated, with a CAC equal to $102.5/tCO2. At an 85% capture level, the CAC for the conventional NOAK NGCC plant is $104.1/tCO2; maintaining this same CAC value, the carbon capture rate could increase from 85% to 90.8% if EGR configuration is implemented. Finally, from the findings of this research, it is concluded that the CAC for NOAK plants is expected to be, in the best scenario, as low as $69/tCO2. Therefore, these plants might need at least a similar carbon tax value to ensure their operation during their useful life.

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Section: Resultsmentioning

confidence: 74%

Section: Methodology Study Casesmentioning

confidence: 99%

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Cost projection of combined cycle power plants equipped with post-combustion carbon capture

Díaz-Herrera

Romero‐Martínez²,

Ascanio³

2022

Front. Energy Res.

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“…In fact, NGCC power plants are characterized by the production of a large FG flow rate, with low CO 2 (3-4 mol%) and high O 2 (11-12 mol%) contents, due to the large excess of air needed to keep the temperature below allowable values in the combustor. For this reason, technological modifications of the power plant, such as Exhaust Gas Recirculation (EGR), Sequential Gas Turbine Combustion (SGTC), and others, are being investigated to increase the CO 2 content and facilitate the subsequent capture step [46]. However, because these solutions are still at the development stages, they are not considered in this work.…”

Section: Electrical Energy Production From Natural Gasmentioning

confidence: 99%