Assessing the potential of molten carbonate fuel cell-based schemes for carbon capture in natural gas-fired combined cycle power plants

JOURNAL OF POWER SOURCES

卷:448

Article

Spinelli, M.¹  Di Bona, D.¹  Gatti, M.^1,2  Martelli, E.²  Vigano, F.^1,2  Consonni, S.^1,2 

[1] LEAP Scarl, Via Nino Bixio 27C, I-29121 Piacenza, Italy

[2] Politecn Milan, Dept Energy, Via Lambruschini 4, I-20156 Milan, MI, Italy

关键词: Post-combustion CO2 capture;    Molten carbonate fuel cell;    Natural gas combined cycle;    Metal dusting;    Cost of CO2 avoided;   

DOI  :  10.1016/j.jpowsour.2019.227223

来源: Elsevier

【 摘 要 】

This work explores two configurations of natural gas-fired combined cycles (NGCC) with molten carbonate fuel cells (MCFC) for CO2 capture. Special attention is devoted to the selection of MCFC operating conditions (trade-off between CO2 capture and voltage losses), heat integration scheme, fuel use and CO2 purification. Two schemes are considered: (i) in the first integrated scheme, MCFC modules are installed between the gas turbine and the heat recovery steam generator (HRSG) to maximize the efficiency of the integrated power plant; (ii) in the second non-integrated layout, the MCFC is located downstream of the HRSG and a regenerative heat exchanger is designed to preheat cathode reactants up to the MCFC working temperature. This study includes a full techno-economic analysis of the two layouts based on a preliminary sizing of the key-components, and a sensitivity analysis on the CO2 utilization factor. Compared to a benchmark amine scrubbing process, the integrated configuration shows considerably better performance (Specific Primary Energy Consumption for CO2 Avoided - SPECCA = 0.31 MJ kg(CO2)(-1)*, Cost of CO2 avoided - CCA = 50 $ t(CO2)(-1)), whereas the non-integrated solution shows higher energy penalties but similar CO2 avoidance cost (SPECCA = 2.4 MJ kg(CO2)(-1); CCA = 76 $ t(CO2)(-1)).

【 授权许可】

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