Energy and Economic Assessment of Oxy-Fuel Combustion CO 2 Capture in Coal-Fired Power Plants

Yuyang Yuan, Lei Wang (), Yaming Zhuang, Ying Wu and Xiaotao Bi
Additional contact information
Yuyang Yuan: School of Environmental Science and Engineering, Nanjing Tech University, 30 Puzhu South Road, Nanjing 211816, China
Lei Wang: School of Environmental Science and Engineering, Nanjing Tech University, 30 Puzhu South Road, Nanjing 211816, China
Yaming Zhuang: School of Mechanical and Electrical Engineering, Suqian University, 399 Huanghe Road, Suqian 223800, China
Ying Wu: School of Environmental Science and Engineering, Nanjing Tech University, 30 Puzhu South Road, Nanjing 211816, China
Xiaotao Bi: Chemical and Biological Engineering Department, University of British Columbia, Vancouver, BC V6T 1Z3, Canada

Energies, 2024, vol. 17, issue 18, 1-18

Abstract: Oxy-fuel combustion technology replaces air with a mixture of pure O 2 and recycled flue gas for coal combustion, which leads to difficulties in the waste heat recovery of flue gas in the boiler tail of coal-fired power plants. This paper proposes a new integration scheme for waste heat recovery of flue gas in coal-fired power plants with oxy-fuel combustion CO 2 capture. By introducing an oxygen preheater, a recycled flue gas preheater, and a low-pressure economizer, the waste heat of flue gas is fully recovered to preheat oxygen, recycled flue gas, and feed water, respectively. The proposed scheme simultaneously ensures the safe operation of the recycled fan and improves the thermal performance of the coal-fired power plants. Compared to the air combustion configuration, the boiler’s efficiency and gross power efficiency in the oxy-fuel combustion configuration are increased by 0.42% and 1.29%, respectively. Due to power consumption for the added equipment, the net power efficiency is reduced by 10.41%. A techno-economic analysis shows that the cost of electricity for oxy-fuel combustion in coal-fired power plants has increased from USD 46.45/MWh to USD 80.18/MWh, and the cost of the CO 2 avoided reaches USD 43.24/t CO 2 .

Keywords: CO 2 capture; oxy-fuel combustion; recycled flue gas; waste heat recovery; thermodynamic and techno-economic performance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/17/18/4626/pdf (application/pdf)
https://www.mdpi.com/1996-1073/17/18/4626/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:17:y:2024:i:18:p:4626-:d:1478747

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().