Techno-economic evaluation of near-zero CO2 emission gas-fired power generation technologies: A review

Navid Khallaghi, Dawid P. Hanak, Vasilije Manovic

Research output: Contribution to journalReview articlepeer-review


Recently, natural gas-fired power generation has attracted more attention as it has lower specific CO2 emissions and higher operational flexibility than coal- and oil-fired power generation. In state-of-the-art gas-fired oxy-combustion cycles, combustion takes place at elevated pressure, which enables high efficiency and competitive economic performance. This review presents a new insight by summarising the main challenges associated with these types of cycles and covers: (i) O2 production methods and purity; (ii) types of exhaust gas recirculation; and (iii) operating pressure. The techno-economic evaluation of the state-of-the-art gas-fired power cycles showed that although the Allam cycle is superior among other cycles with an efficiency of 55.1%, its highly affected levelised cost of electricity by interest rate adds more uncertainty to investment decisions. Importantly, the progress towards the next generation of gas-fired oxy-combustion cycles will require the development of less complex cycles with more efficient and less energy-intensive O2 production.

Original languageEnglish
Article number103095
JournalJournal of Natural Gas Science and Engineering
Publication statusPublished - 4 Dec 2019


  • Carbon capture
  • Exhaust gas recirculation
  • Gas-fired power plant
  • High-pressure combustion
  • Techno-economic analysis


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