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Modelling of SOEC-FT reactor: Pressure effects on methanation process

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  • Chen, Bin
  • Xu, Haoran
  • Ni, Meng

Abstract

In this paper a numerical model is developed for a novel reactor combining a Solid Oxide Electrolyzer Cell (SOEC) section with a Fischer Tropsch like section for methane production under pressurized & temperature-gradient condition. Governing equations for mass, momentum, charge transport are solved with Finite Element Method. The chemical reaction kinetics of reversible water gas shift reaction and reversible methanation reaction in Ni/YSZ cathode are fully considered. The model is validated by comparing simulation results with experimental data. Parametric simulations are conducted to understand the physical-chemical processes in the reactor with a focus on the pressure effect. It is predicted that the optimal operating pressure is around 3bar, beyond which the CH4 conversion ratio (2.5 times enhanced than 1bar operating) cannot be further increased. It is also found that it is feasible to operate the pressurized SOEC at a lower temperature for CH4 production with improved catalyst activity.

Suggested Citation

  • Chen, Bin & Xu, Haoran & Ni, Meng, 2017. "Modelling of SOEC-FT reactor: Pressure effects on methanation process," Applied Energy, Elsevier, vol. 185(P1), pages 814-824.
    • Handle: RePEc:eee:appene:v:185:y:2017:i:p1:p:814-824
    DOI: 10.1016/j.apenergy.2016.10.095
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    References listed on IDEAS

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    1. Stempien, Jan Pawel & Ni, Meng & Sun, Qiang & Chan, Siew Hwa, 2015. "Thermodynamic analysis of combined Solid Oxide Electrolyzer and Fischer–Tropsch processes," Energy, Elsevier, vol. 81(C), pages 682-690.
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    1. Chen, Yanbo & Luo, Yu & Shi, Yixiang & Cai, Ningsheng, 2020. "Theoretical modeling of a pressurized tubular reversible solid oxide cell for methane production by co-electrolysis," Applied Energy, Elsevier, vol. 268(C).
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    6. Siang, T.J. & Jalil, A.A. & Abdulrasheed, A.A. & Hambali, H.U. & Nabgan, Walid, 2020. "Thermodynamic equilibrium study of altering methane partial oxidation for Fischer–Tropsch synfuel production," Energy, Elsevier, vol. 198(C).
    7. Mehran, Muhammad Taqi & Yu, Seong-Bin & Lee, Dong-Young & Hong, Jong-Eun & Lee, Seung-Bok & Park, Seok-Joo & Song, Rak-Hyun & Lim, Tak-Hyoung, 2018. "Production of syngas from H2O/CO2 by high-pressure coelectrolysis in tubular solid oxide cells," Applied Energy, Elsevier, vol. 212(C), pages 759-770.
    8. Abdellah Essaghouri & Zezhi Zeng & Bingguo Zhao & Changkun Hao & Yuping Qian & Weilin Zhuge & Yangjun Zhang, 2022. "Effects of Radial and Circumferential Flows on Power Density Improvements of Tubular Solid Oxide Fuel Cells," Energies, MDPI, vol. 15(19), pages 1-21, September.
    9. Liu, Chang & Dang, Zheng & Xi, Guang, 2024. "Numerical study on thermal stress of solid oxide electrolyzer cell with various flow configurations," Applied Energy, Elsevier, vol. 353(PA).
    10. Xu, Haoran & Maroto-Valer, M. Mercedes & Ni, Meng & Cao, Jun & Xuan, Jin, 2019. "Low carbon fuel production from combined solid oxide CO2 co-electrolysis and Fischer-Tropsch synthesis system: A modelling study," Applied Energy, Elsevier, vol. 242(C), pages 911-918.
    11. Lee, Dong-Young & Mehran, Muhammad Taqi & Kim, Jonghwan & Kim, Sangcho & Lee, Seung-Bok & Song, Rak-Hyun & Ko, Eun-Yong & Hong, Jong-Eun & Huh, Joo-Youl & Lim, Tak-Hyoung, 2020. "Scaling up syngas production with controllable H2/CO ratio in a highly efficient, compact, and durable solid oxide coelectrolysis cell unit-bundle," Applied Energy, Elsevier, vol. 257(C).
    12. Luo, Yu & Wu, Xiao-yu & Shi, Yixiang & Ghoniem, Ahmed F. & Cai, Ningsheng, 2018. "Exergy analysis of an integrated solid oxide electrolysis cell-methanation reactor for renewable energy storage," Applied Energy, Elsevier, vol. 215(C), pages 371-383.
    13. Wang, Ligang & Pérez-Fortes, Mar & Madi, Hossein & Diethelm, Stefan & herle, Jan Van & Maréchal, François, 2018. "Optimal design of solid-oxide electrolyzer based power-to-methane systems: A comprehensive comparison between steam electrolysis and co-electrolysis," Applied Energy, Elsevier, vol. 211(C), pages 1060-1079.
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