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

被引:69
作者
Khallaghi, Navid [1 ]
Hanak, Dawid P. [1 ]
Manovic, Vasilije [1 ]
机构
[1] Cranfield Univ, Sch Water Energy & Environm, Energy & Power, Cranfield MK43 0AL, Beds, England
关键词
Carbon capture; Gas-fired power plant; High-pressure combustion; Exhaust gas recirculation; Techno-economic analysis; CHEMICAL LOOPING COMBUSTION; OXY-FUEL COMBUSTION; CARBON-DIOXIDE CAPTURE; AIR SEPARATION; FLUE-GAS; HIGH-EFFICIENCY; PERFORMANCE ANALYSIS; PURIFICATION UNITS; WATER-VAPOR; TURBINE;
D O I
10.1016/j.jngse.2019.103095
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
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) O-2 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 O-2 production.
引用
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页数:13
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