Mathematical modeling of anion exchange membrane-based direct urea/O2 fuel cell incorporating the effects of under-rib mass transport and gaseous bubble formation

IF 4.5 3区化学 Q1 Chemical Engineering

Journal of Electroanalytical Chemistry Pub Date : 2023-09-15 Epub Date: 2023-07-22 DOI:10.1016/j.jelechem.2023.117682

Tuan Loi Nguyen , Quang Nhat Tran , Phan Khanh Thinh Nguyen

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Abstract

In this study, a simplified mathematical model was proposed for predicting the performance of an anion exchange membrane-based direct urea/O₂ fuel cell (AEM-DUFC-O) with a serpentine flow channel. Because the effects of under-rib mass transfer and gaseous bubble formation were considered, this model exhibited good agreement with both lab-experimental and literature data, with high R² values of 0.941–0.995 and NRMSE of 0.078–0.019, suggesting that it can reasonably be applied for further analysis and optimization of AEM-DUFC-O. The simulation results indicated that the under-rib mass transfer has a beneficial effect on the fuel cell efficiency, while the formation of gaseous bubbles is detrimental. In addition, the flow-field structure (i.e., rib width and channel dimensions) and operational parameters (i.e., urea and KOH concentrations, temperature, and feeding flow rate) also exhibited crucial impacts and need to be further optimized to maximize the power density output and energy recovery efficiency of AEM-DUFC-O.

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考虑肋下质量传递和气泡形成影响的阴离子交换膜直接尿素/O2燃料电池的数学建模

在本研究中，提出了一个简化的数学模型来预测具有蛇形流道的阴离子交换膜直接尿素/O2燃料电池(AEM-DUFC-O)的性能。由于考虑了肋下传质和气泡形成的影响，该模型与实验和文献数据吻合较好，R2为0.941 ~ 0.995,NRMSE为0.078 ~ 0.019，可以合理地应用于AEM-DUFC-O的进一步分析和优化。仿真结果表明，肋下传质有利于提高燃料电池效率，而气泡的形成则不利于提高燃料电池效率。此外，流场结构(即肋宽和通道尺寸)和操作参数(即尿素和KOH浓度、温度和进料流量)也表现出至关重要的影响，需要进一步优化以最大限度地提高AEM-DUFC-O的功率密度输出和能量回收效率。

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来源期刊

Journal of Electroanalytical Chemistry Chemical Engineering-General Chemical Engineering

CiteScore

7.50

自引率

6.70%

发文量

912

审稿时长

>12 weeks

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.