Evaluation of polarization and hydrogen production efficiency of solid oxide electrolysis stack with La0.6Sr0.4Co0.2Fe0.8O3−δ- Ce0.9Gd0.1O1.95 oxygen electrode

Liu, Tong-Le; Wang, Cheng; Hao, Sijia; Fu, Zhiyuan; Peppley, Brant A.; Mao, Zhiming; Wang, Jianlong; Mao, Zongqiang

doi:10.1016/j.ijhydene.2016.04.243

Cited by 23 publications

(10 citation statements)

References 29 publications

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“…Compared with the SOEC data obtained by Liu et al 20 in an experiment, it is found the operating temperature, operating pressure, inbound gas components, and relevant electrolyte parameters are consistent with the model simulation in this paper. It can be concluded that the simulation data in this paper is in alignment with the experimental data, thus proving the correctness of the model simulation, as shown in Figure 2.…”

Section: Soec Energy and Mass Transfer Modelsupporting

confidence: 90%

Analysis of performance optimization of high‐temperature solid oxide electrolytic cell based on the coupling of flow, heat, and mass transfer and electrochemistry

Chen

Huaiwu

Zhang

et al. 2022

Energy Science & Engineering

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A three‐dimensional (3D) model simulating the flow, heat, and mass transfer characteristics of a high‐temperature solid oxide electrolytic cell (SOEC) is developed based on the coupling of gas flow in channels, the electrochemical reaction in the triple‐phase boundary of electrodes and component diffusion in the porous media in electrodes. The model comprises several equations such as mass equation, momentum equation, energy equation, mass transport equation, and electrochemical reaction equation. The computational fluid dynamics method is adopted to simulate the operating performance (current density distribution, temperature distribution, and gas component distribution) of the 3D electrolytic cell model under different operating conditions (electrolytic voltage, gas temperature at the inlet, flow rate and flow pattern). The simulation results show that gas temperature at the inlet obviously influences electrolytic hydrogen production by SOEC. In the case of lower voltage, a higher temperature can be selected to effectively increase the current density. When the current density is high enough, the supply flow of water vapor needs to be increased to prevent the inhibition reaction of low‐concentration reactants, but this may lead to the reduction of water vapor conversion. In practical operation, a lower voltage and higher gas temperature should be selected, and the flow rate of water vapor appropriately increased to ensure hydrogen production and improve operating efficiency.

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Section: Soec Energy and Mass Transfer Modelsupporting

confidence: 90%

Analysis of performance optimization of high‐temperature solid oxide electrolytic cell based on the coupling of flow, heat, and mass transfer and electrochemistry

Chen

Huaiwu

Zhang

et al. 2022

Energy Science & Engineering

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“…The ohmic overpotential is generated by the mass transfer resistance within the electrode and the movement of the ionic conducting resistance in the electrolyte layer . These resistances depend on the type of material and the microstructure of the porous electrode.…”

Section: System Description and Modelingmentioning

confidence: 99%

Process Development and Technoeconomic Analysis of Different Integration Methods of Coal-to-Ethylene Glycol Process and Solid Oxide Electrolysis Cells

Yang

Chu

Zhang

et al. 2021

Ind. Eng. Chem. Res.

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The conventional coal-to-ethylene glycol (CtEG) process is criticized for its high CO 2 emissions. Because most CtEG projects are located in areas rich in renewable energy such as wind energy and solar energy, two novel green hydrogen-assisted CtEG processes are proposed and analyzed by the integration of solid oxide electrolysis cell (SOEC) technology: the CtEG process integrated with the SOEC technology of only steam electrolysis (SOEC-CtEG) and that of steam and carbon dioxide electrolysis (CoSOEC-CtEG). The effects of the operating temperature, current density, and inlet gas composition on the electrochemical performance of the solid oxide steam electrolytic and coelectrolytic processes are investigated and compared based on their electrochemical and flowsheet-based models. The thermodynamic and technoeconomic advantages of the two proposed processes are manifested by comparison with a conventional process. The results show that the two proposed processes are promising because they increase the carbon utilization efficiency by 26.13 and 22.48%, increase the exergy efficiency by 14.82 and 17.34%, decrease the total capital investment by 23.60 and 19.38%, decrease the levelized production cost by 20.55 and 27.47%, and increase the internal rate of return by 8.85 and 9.18%. In addition, the sensitivity analysis results show that the two proposed processes have stronger antirisk ability than the conventional process.

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“…SOEC technology is of great superiority and prospect. Among three main electrolysis configurations, it has been reported that the efficiency of hydrogen production by high temperature SOEC is more than twice of that by an Alkaline electrolysis cell, and is 1.5 times of that by proton exchange membrane electrolyzer [2]. There are mainly three kinds of SOEC according to reaction gas species: high temperature H 2 O electrolysis, CO 2 electrolysis, H 2 O and CO 2 co-electrolysis cell.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the authors of [8] studied the effect of cathode thickness on CO 2 /H 2 O co-electrolysis performance under various operating conditions by experiment, which reveals that SOEC performance can be substantially improved by decreasing cathode thickness. For the time being, most of the SOEC researches were conducted experimentally [2,[9][10][11][12]. Unfortunately, the experiment is expensive and time-consuming, so research about structure optimization by experiment is rare.…”

Section: Introductionmentioning

confidence: 99%

Optimization Design of Rib Width and Performance Analysis of Solid Oxide Electrolysis Cell

et al. 2020

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Structure design is of great value for the performance improvement of solid oxide electrolysis cells (SOECs) to diminish the gap between scientific research and industrial application. A comprehensive multi-physics coupled model is constructed to conduct parameter sensitivity analysis to reveal the primary and secondary factors on the SOEC performance and optimal rib width. It is found that the parameters of the O2 electrode have almost no influence on the optimal rib width at the H2 electrode side and vice versa. The optimized rib width is not sensitive to the electrode porosity, thickness, electrical conductivity and gas composition. The optimal rib width at the H2 electrode side is sensitive to the contact resistance at the interface between the electrode and interconnect rib, while the extremely small concentration loss at the O2 electrode leads to the insensitivity of optimal rib width to the parameters influencing the O2 diffusion. In addition to the contact resistance, the applied cell voltage and pitch width also has a dramatic influence on the optimal rib width of the fuel electrode. An analytical expression considering the influence of total cell polarization loss, the pitch width and the contact resistance is further developed for the benefit of the engineering society. The maximum error in the cell performance between the numerically obtained and analytically acquired optimal rib width is only 0.14% and the predictive power of the analytical formula is fully verified.

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Evaluation of polarization and hydrogen production efficiency of solid oxide electrolysis stack with La0.6Sr0.4Co0.2Fe0.8O3−δ- Ce0.9Gd0.1O1.95 oxygen electrode

Cited by 23 publications

References 29 publications

Analysis of performance optimization of high‐temperature solid oxide electrolytic cell based on the coupling of flow, heat, and mass transfer and electrochemistry

Analysis of performance optimization of high‐temperature solid oxide electrolytic cell based on the coupling of flow, heat, and mass transfer and electrochemistry

Process Development and Technoeconomic Analysis of Different Integration Methods of Coal-to-Ethylene Glycol Process and Solid Oxide Electrolysis Cells

Optimization Design of Rib Width and Performance Analysis of Solid Oxide Electrolysis Cell

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