Performance evaluation of a pressurized oxy-combustion power plant according to wet and dry flue gas recirculation

Kim, Seongil; Lee, Hosoo; Lee, Yong woon; Yang, Won Seok

doi:10.1016/j.ijggc.2021.103277

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…These are highly favourable conditions for low-temperature CO 2 processing units (CPUs), technologies that are considered the most efficient means for removing the volatile components and purifying CO 2 . Separation and purification are usually achieved by compressing and partially condensing the flue gas mixture at temperatures down to around −50 • C. Different process layouts of CPUs for CO 2 capture in oxyfuel processes have been proposed [22][23][24][25][26][27].…”

Section: Co 2 Capture From Oxyfuel Combustionmentioning

confidence: 99%

CO2 Capture and Enhanced Hydrogen Production Enabled by Low-Temperature Separation of PSA Tail Gas: A Detailed Exergy Analysis

Berstad,

Straus,

Gundersen

2024

Energies

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Hydrogen from natural gas reforming can be produced efficiently with a high CO2 capture rate. This can be achieved through oxygen-blown autothermal reforming as the core technology, combined with pressure-swing adsorption for hydrogen purification and refrigeration-based tail gas separation for CO2 capture and recirculation of residual hydrogen, carbon monoxide, and methane. The low-temperature tail gas separation section is presented in detail. The main objective of the paper is to study and quantify the exergy efficiency of this separation process in detail. To achieve this, a detailed exergy analysis is conducted. The irreversibilities in 42 different process components are quantified. In order to provide transparent verification of the consistency of exergy calculations, the total irreversibility rate is calculated by two independent approaches: Through the bottom-up approach, all individual irreversibilities are added to obtain the total irreversibility rate. Through the top-down approach, the total irreversibility rate is calculated solely by the exergy flows crossing the control volume boundaries. The consistency is verified as the comparison of results obtained by the two methods shows a relative deviation of 4 · 10−7. The exergy efficiency of the CO2 capture process is calculated, based on two different definitions. Both methods give a baseline exergy efficiency of 58.38%, which indicates a high degree of exergy utilisation in the process.

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Section: Co 2 Capture From Oxyfuel Combustionmentioning

confidence: 99%

CO2 Capture and Enhanced Hydrogen Production Enabled by Low-Temperature Separation of PSA Tail Gas: A Detailed Exergy Analysis

Berstad,

Straus,

Gundersen

2024

Energies

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“…For NOx emission reduction, FIR technology can be combined with FGR technology for boilers, which will be called integrated FIR. Integrated FIR is designed to regulate the reheat stream temperature and subsequently alter the heat transfer properties in the boiler . However, it indeed makes the combustion system more complicated due to the inclusion of extra components such as a recirculation fan and flue-gas pipes.…”

Section: Classification and Evaluation Of Flue-gas Internal Recircula...mentioning

confidence: 99%

“…Integrated FIR is designed to regulate the reheat stream temperature and subsequently alter the heat transfer properties in the boiler. 41 However, it indeed makes the combustion system more complicated due to the inclusion of extra components such as a recirculation fan and flue-gas pipes. Therefore, it is challenging to reduce the operation and maintenance costs and increase the plant efficiency on account of energy loss.…”

Section: Classification and Evaluation Of Flue-gas Internal Recircula...mentioning

confidence: 99%

Review and Perspectives of Novel Flue-Gas Internal Recirculation Combustion Technology for Low Nitrogen Emission: Fundamentals, Performance, Method, and Applications for Conventional Fossil Fuels and Sustainable e-Fuels

Zhu

Wang

2023

Energy Fuels

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Novel flue-gas internal recirculation (FIR) is gaining increasing attention owing to its overwhelming stable combustion and nitrogen oxide (NOx) reduction advantages. This paper aims to reveal the nitrogen reduction mechanisms in the exciting new FIR methods and discuss the main FIR techniques in terms of combustion performance. In particular, the basic concept and the nitrogen reduction mechanism of FIR are first introduced. Besides, three main categories of FIRs are reviewed in accordance with the characteristics and operation status of different devices. The analysis of 16 FIR systems suggests that the recirculation space, effective recirculation rate, and combustion ignition limit must be considered during the design process, in order to balance NOx reduction and combustion efficiency. The integrated FIR and external FIR can achieve NOx emission reductions of at least 20% and 15.5%−20%, respectively. The embedded FIR exhibits more outstanding NOx emission reduction performance, with NOx reduction ratios of up to 26.09%−65%. In addition, the influence elements of FIR on combustion efficiency and nitrogen reduction are also discussed. In conclusion, strategies aimed at enhancing the combustion performance of novel FIR burners are thoroughly delineated, and the challenges that need to be addressed are succinctly highlighted in a forward-looking perspective. This review is expected to clarify the NOx reduction and combustion characteristics of current FIR techniques and suggest a development direction for FIR design.

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Pressurized oxy-fuel combustion with sCO2 cycle and ORC for power production and carbon capture

Chen,

Zhou,

Xiang

2024

Case Studies in Thermal Engineering

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Performance evaluation of a pressurized oxy-combustion power plant according to wet and dry flue gas recirculation

Cited by 6 publications

References 22 publications

CO2 Capture and Enhanced Hydrogen Production Enabled by Low-Temperature Separation of PSA Tail Gas: A Detailed Exergy Analysis

CO2 Capture and Enhanced Hydrogen Production Enabled by Low-Temperature Separation of PSA Tail Gas: A Detailed Exergy Analysis

Review and Perspectives of Novel Flue-Gas Internal Recirculation Combustion Technology for Low Nitrogen Emission: Fundamentals, Performance, Method, and Applications for Conventional Fossil Fuels and Sustainable e-Fuels

Pressurized oxy-fuel combustion with sCO2 cycle and ORC for power production and carbon capture

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