Performance, economic and exergy analyses of carbon capture processes for a 300 MW class integrated gasification combined cycle power plant

Lee, Woo Sung; Lee, Jae Cheol; Oh, Hyun Taek; Baek, Seung Won; Oh, Min; Lee, Chang Ha

doi:10.1016/j.energy.2017.06.059

Cited by 40 publications

(7 citation statements)

References 30 publications

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“…The small exergy destruction of the flash drum in this study may differ from the values reported in other studies. In some research investigations, the throttling valve and flash drum are considered as a one-unit package that may result in a higher exergy destruction value than the current study. ,, …”

Section: Resultsmentioning

confidence: 92%

“…In some research investigations, the throttling valve and flash drum are considered as a one-unit package that may result in a higher exergy destruction value than the current study. 36,37,39 The exergy efficiency, as another indicator of exergy performance, is obtained to analyze the efficiency of the process components. Figure 5 illustrates the exergy efficiency of the AGR equipment.…”

Section: Resultsmentioning

confidence: 99%

“…The exergy analysis has received wide acceptance among researchers and engineers over the last two decades. There are several research studies in the published literature that focus on the exergy assessment of CO 2 capture through absorption, but less attention has been paid to the exergy analysis of AGR plants that involve high-pressure/-temperature natural gas streams. − For example, Banat et al performed exergy evaluation in a gas sweetening plant. The exergy destruction of AGR unit equipment was calculated, and the corresponding exergy efficiencies were determined.…”

Section: Introductionmentioning

confidence: 99%

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Advanced Exergy Analysis of an Acid Gas Removal Plant to Explore Operation Improvement Potential toward Cleaner Production

et al. 2021

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This research aims to conduct an integrated energy and exergy evaluation of an acid gas recovery (AGR) plant. An effective simulation platform is developed and linked to a thermodynamic modeling approach. A newly developed amine blend, composed of methyl-di-ethanolamine (MDEA), di-ethanolamine (DEA), and piperazine (PZ), is utilized to absorb the acid gases. Based on the classical energy analysis, an energy loss of 70.79 MW and an energy efficiency of 90.29% are attained for each process component. Conventional exergy analysis is then conducted, and the sources of irreversibility are identified. The postprocessing is performed on the conventional exergy evaluation results using an advanced exergy method, to obtain a more realistic insight into the system's energy/exergy performance. It is concluded that stripper and absorber account for the maximum exergy destructions of 8.15 and 7.55 MW, respectively; this shows significant potential for operation improvement in these two key equipment. Also, it is concluded that 5.47 and 4.92 MW unavoidable exergy destructions occur in the stripper and absorber, respectively, which cannot be prevented. It is found from the advanced exergy analysis that the absorber, stripper, and heat exchanger with the greatest recoverable exergy amount (e.g., exergy rehabilitation ratio) exhibit substantial operation enhancement capability in comparison to the other process equipment. The overall exergy efficiency of the entire system is enhanced from 99.70 to 99.90%, when the technological constraints are abolished and the ideal condition governs. The results of avoidable/endogenous exergy destruction reveal high potential of the absorber (2.58 MW), stripper (2.18 MW), heat exchanger (0.74 MW), and valve (0.19 MW) in terms of operation improvement compared to the other process components. Based on the environmental analysis, a large amount of CO 2 emission (22.12 ton•day −1 ) can be prevented, when the process components are technologically upgraded.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Advanced Exergy Analysis of an Acid Gas Removal Plant to Explore Operation Improvement Potential toward Cleaner Production

et al. 2021

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“…Technoeconomic analysis is useful to investigate the possibility of deploying present technologies to new markets. Technoeconomic analysis requires investigation of various closely intertwined elements, including technology, project design, project capital costs, operational and maintenance expenses, and operational cash flows . Different skill sets and tools are required for each stage of the analysis .…”

Section: Introductionmentioning

confidence: 99%

“…Technoeconomic analysis requires investigation of various closely intertwined elements, including technology, project design, project capital costs, operational and maintenance expenses, and operational cash flows. 23 Different skill sets and tools are required for each stage of the analysis. 24 Therefore, a simulation study should be executed to examine the energy efficiency and economic effects on carbon capture based on CLC technology.…”

Section: Introductionmentioning

confidence: 99%

Performance and Cost Analysis of Natural Gas Combined Cycle Plants with Chemical Looping Combustion

Lee

Lee³

2021

ACS Omega

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The natural gas combined cycle (NGCC) is the most popular and efficient fossil fuel power plant; however, integrating a carbon capture system reduces its performance efficiency. The demand to reduce the carbon capture cost and improve eco-friendliness drives the development of alternatives. In this study, four alternative NGCC-based process schemes were designed: NGCC with amine carbon capture as a base configuration and NGCCs with three different chemical looping combustion (CLC) configurations. Detailed heat and material balances were evaluated for all four cases using the PRO/II simulation package. A comparative analysis of the gross and net power, plant efficiency, and carbon capture efficiency, which are imperative to optimizing the process configuration, was conducted for all of the proposed cases. All NGCC-CLC processes could produce higher net power than NGCC-MEA because the amine regenerator consumes a high amount of power in its operation. In the condition using an equal amount of natural gas supply, NGCC-CLC configurations using excess air could produce a net power of 510.1 MW with a plant efficiency of 44.35%. The excess air fed in both cases enabled the turbine to generate more power. NGCC-CLC using excess air with steam turbine integration has an investment cost of 132.9 $/net MWh, an operating cost of 56.7 $/net MWh year, and a levelized cost of electricity of 90.9 $/MWh. In addition, NGCC-CLC with excess air resulted in a carbon capture efficiency of 99.93% under 59.2 $/ton of CO 2 , which was higher than that of NGCC-MEA with a carbon efficiency of 95.1%. NGCC-CLC using excess air with steam turbine integration is considered as the most efficient process scheme for generating power from natural gas with regard to efficiency, cost, and environmental impact.

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Pre‐combustion carbon dioxide capture: A thermo‐economic comparison for dual‐stage Selexol process and combined Sulfinol‐Selexol process

Ramzan

Rizwan

Zaman

et al. 2022

Intl J of Energy Research

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Summary The emission of greenhouse gases from fossil‐fueled power plants is a major concern in power generation sector. Carbon dioxide (CO2) emissions constitute the major portion of the greenhouse gases. Among several opportunities available to reduce CO2, carbon capture and sequestration (CCS) is considered to be a possible option for CO2 mitigation. However, implementation of CCS increases the cost of power generation significantly. The main effort of this study is to explore the technical and economic aspects of a dual‐stage Selexol process and a proposed process named combined Sulfinol‐Selexol process, for pre‐combustion capture. The combined CO2 capture process utilizes Sulfinol‐M solvent‐based process for the selective capture of hydrogen sulfide and dimethyl ether of polyethylene glycol solvent‐based Selexol process for CO2 capture. The performance of both processes is assessed and compared in terms of energy consumptions, operating cost, and capital cost by simulating in Aspen HYSYS V.11. Sensitivity analysis for lean solvent inlet temperature, pressures of multi‐flash system and number of stages of the absorption columns is performed to improve both processes. The proposed combined process is 5.8% more economical than the baseline dual‐stage Selexol process as well as its overall process is simpler. However, after sensitivity analysis, both processes improved, and the dual‐stage Selexol process is found to be 3.31% more economical than the combined Sulfinol‐Selexol process.

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Performance, economic and exergy analyses of carbon capture processes for a 300 MW class integrated gasification combined cycle power plant

Cited by 40 publications

References 30 publications

Advanced Exergy Analysis of an Acid Gas Removal Plant to Explore Operation Improvement Potential toward Cleaner Production

Advanced Exergy Analysis of an Acid Gas Removal Plant to Explore Operation Improvement Potential toward Cleaner Production

Performance and Cost Analysis of Natural Gas Combined Cycle Plants with Chemical Looping Combustion

Pre‐combustion carbon dioxide capture: A thermo‐economic comparison for dual‐stage Selexol process and combined Sulfinol‐Selexol process

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