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Pressure drop through platinized titanium porous electrodes for cerium-based redox flow batteries
AIChE Journal ( IF 3.7 ) Pub Date : 2017-10-25 08:05:46 , DOI: 10.1002/aic.16000
Luis F. Arenas 1 , Carlos Ponce de León 1 , Frank C. Walsh 1
Affiliation  

The pressure drop, inline image, across a redox flow battery is linked to pumping costs and energy efficiency, making fluid properties of the electrolyte important in scale-up operations. The inline image at diverse platinized titanium electrodes in Ce-based redox flow batteries is reported as a function of mean linear electrolyte velocity measured in a rectangular channel flow cell. Darcy's friction factor and permeability vs. Reynolds number are calculated. Average permeability values are: 7.10 × 10−4 cm2 for Pt/Ti mesh, 4.45 × 10−4 cm2 for Pt/Ti plate + turbulence promoters, 1.67 × 10−5 cm2 for Pt/Ti micromesh, and 1.31 × 10−6 cm2 for Pt/Ti felt. The electrochemical volumetric mass transport coefficient, inline image, is provided as a function of inline image. In the flow-by configuration, Pt/Ti felt combines high inline image values with a relatively high inline image, followed by Pt/Ti micromesh. Pt/Ti mesh and Pt/Ti plate gave a lower inline image but poorer electrochemical performance. Implications for cell design are discussed. © 2017 American Institute of Chemical Engineers AIChE J, 00: 000–000, 2017

中文翻译:

铈基氧化还原液流电池通过镀钛钛多孔电极的压降

内嵌图片氧化还原液流电池上的压降 与抽水成本和能源效率有关,这使得电解液的流体性质在按比例放大操作中很重要。的 内嵌图片在基于Ce的氧化还原液流电池多样镀铂的钛电极被报告为在矩形通道中的流动细胞测量的平均线性电解质速度的函数。计算了达西的摩擦因数和渗透率与雷诺数的关系。平均渗透率值是:7.10×10 -4厘米2为铂/钛网,4.45×10 -4厘米2为的Pt / Ti板+湍流促进,1.67×10 -5厘米2为铂/ Ti的微筛孔网,和1.31× 10 -6厘米2用于Pt / Ti毡。电化学体积质量传递系数 内嵌图片为的函数 内嵌图片。在流通配置中,Pt / Ti毡结合了较高的 内嵌图片值和相对较高 内嵌图片的Pt / Ti微网。Pt / Ti筛网和Pt / Ti板的内嵌图片电化学性能较低, 但较差。讨论了单元格设计的含义。©2017美国化学工程师学会AIChE J,00:000–000,2017
更新日期:2017-10-25
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