郑国柱, 张广君, 王健成, 吴英豪, 庄子辰, 陈婷, 王绍荣. 燃料辅助电解在固体氧化物电解池中的研究进展[J]. 燃料化学学报(中英文). DOI: 10.3724/2097-213X.2024.JFCT.0022
引用本文: 郑国柱, 张广君, 王健成, 吴英豪, 庄子辰, 陈婷, 王绍荣. 燃料辅助电解在固体氧化物电解池中的研究进展[J]. 燃料化学学报(中英文). DOI: 10.3724/2097-213X.2024.JFCT.0022
ZHENG Guozhu, ZHANG Guangjun, WANG Jiancheng, WU Yinghao, ZHUANG Zichen, CHEN Ting, WANG Shaorong. Research progress on fuel assisted solid oxide electrolysis cells[J]. Journal of Fuel Chemistry and Technology. DOI: 10.3724/2097-213X.2024.JFCT.0022
Citation: ZHENG Guozhu, ZHANG Guangjun, WANG Jiancheng, WU Yinghao, ZHUANG Zichen, CHEN Ting, WANG Shaorong. Research progress on fuel assisted solid oxide electrolysis cells[J]. Journal of Fuel Chemistry and Technology. DOI: 10.3724/2097-213X.2024.JFCT.0022

燃料辅助电解在固体氧化物电解池中的研究进展

Research progress on fuel assisted solid oxide electrolysis cells

  • 摘要: 固体氧化物电解池(Solid Oxide Electrolysis Cell, SOEC)在CO2转化和可再生能源电力存储方面表现出极具潜力的应用前景。然而,较高的电能消耗限制了其商业化应用。燃料辅助固体氧化物电解池(Fuel-assisted solid oxide electrolysis cell, FA-SOEC)可以将在固体氧化物电解池中生成的氧气与燃料反应,将燃料的化学能提供给电解反应,从而极大地降低电解池的电能消耗。另外,FA-SOEC可以利用碳氢燃料的部分氧化反应(POM)和氧化偶联反应(OCM)产生合成气及多碳烯烃等。因此,这种新颖的电解模式展现出极高的经济价值和巨大的应用潜力。本工作介绍了近年来FA-SOEC的研究进展,总结了使用不同辅助燃料的FA-SOEC工作原理、FA-SOEC与SOEC的热力学和动力学对比、FA-SOEC的数值模型研究及燃料辅助电极材料的研究进展,总结了其面临的关键问题与挑战,并对未来的发展方向进行了展望。

     

    Abstract: The combustion of fossil fuels has resulted in significant environmental degradation, with the emission of vast quantities of CO2 and other greenhouse gases contributing to a pronounced greenhouse effect. Solid Oxide Electrolysis Cell (SOEC) shows great potential for CO2 conversion and renewable power storage due to the advantage of high electrolysis rate and energy conversion efficiency. However, during SOEC operation, the air electrode side is directly exposed to air and produces oxygen. This exposure creates an oxygen concentration gradient cross the electrode, which results in a certain open circuit voltage. Consequently, overcoming this voltage is necessary to maintain the electrolysis process. This process results in a considerable loss of electrical energy and negative economic impacts. The higher electrical energy consumption further hampers the commercial application of SOEC technology. Fuel-assisted solid oxide electrolysis cell (FA-SOEC) can greatly reduce the electrical energy consumption of the electrolysis cell by feeding fuel into the air electrode side and providing the chemical energy of the fuel to the electrolysis reaction. This review comprehensively introduced working principle, assisted fuel types, operating voltage and the recent research progress on FA-SOEC, the details are as follows: Ⅰ: The working principle of FA-SOEC and SOEC are compared. The fuel electrode of FA-SOEC operates in the same way as SOEC and consumes less electrical energy than SOEC. Through supplying the reducing substances (C, CH4, CO, etc.) to the air electrode (the assisted fuel electrode), the oxygen evoluted from the electrolyte can be consumed, which can largely overcome the overpotential of oxygen evolution reaction (OER) process, thereby reducing the partial pressure of O2 and reaching the equilibrium potential of electrolysis. Ⅱ: The reaction principles of the fuel-assisted electrode with various fuels have been summarized, which demonstrates that the wide range of fuel choices. Meanwhile, FA-SOEC can generate syngas, polycarbon-based olefins, and other products via the partial oxidation reaction (POM) and oxidative coupling reaction (OCM) of hydrocarbon fuels. Ⅲ: The thermodynamic and kinetics comparison between the FA-SOEC and SOEC is discussed. Compared to the SOEC, FA-SOEC enables the electrolysis at lower energy consumption and operation voltage. These results demonstrate that the electrical energy needed for electrolysis can be greatly decreased via FA-SOEC. Ⅳ: The progress research of FA-SOEC in 1D and 2D numerical models are summarized. Numerical simulation research has been focused on the different performance of with and without fuel assisted on SOEC. Meanwhile, the operation conditions, assisted fuel types, and factors for electrochemical performance are systematically evaluated by the numerical simulation research. Ⅴ: The progress research of fuel-assisted electrode materials on metal-ceramic/metal electrode materials and perovskite electrode materials are also summarized, including the basic requirement and issues. Meanwhile, the methods for improving the electrochemical activity of the electrode materials are discussed, such as elemental doping, infiltration modification, and exsolution for perovskite electrodes. Finally, the key problems and challenges, and several suggestions are proposed for the future research. In summary, FA-SOEC is a novel and promising electrochemical reaction device for energy storage applications.

     

/

返回文章
返回