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Theoretical analysis of the effects of operational and designed parameters on the performance of a flow-through porous electrode
You, Dongjiang1,2; Zhang, Huamin1; Chen, Jian1; Zhang HM(张华民)
关键词Flow-through Porous Electrode Two-dimensional Mathematical Model Dimensionless Parameters Mass Transport Ohmic Resistance Kinetics
刊名JOURNAL OF ELECTROANALYTICAL CHEMISTRY
2009-01-15
DOI10.1016/j.jelechem.2008.10.027
625期:2页:165-171
收录类别SCI
文章类型Article
部门归属3
项目归属303
产权排名1;1
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Analytical ; Electrochemistry
研究领域[WOS]Chemistry ; Electrochemistry
关键词[WOS]FUEL-CELLS ; MASS-TRANSFER ; CARBON FELT ; MODEL ; REACTOR
英文摘要A two-dimensional mathematical model for a flow-through porous electrode, in which the electrolyte flow is perpendicular to the current flow, is presented in this paper. In order to study the effects of ohmic resistance, mass transfer and kinetics on the performance of the porous electrode, a set of dimensionless parameters were imported into the model equations. The results reveal that lower ohmic resistance lead to a more uniform current density distribution, which will get a higher utilization of the electrode; an enhancement in convective mass transport will increase the reaction rate, but the increase is in a diminishing manner due to the limit of diffusion rate, so that the effective reaction layer will get thinner until to a limited value; an increase of local mass transfer coefficient will increase the reaction rate and make the effective reaction layer thinner; and the longer the electrode is, the worse the concentration polarization will be. The model could help to guide the rational design of the porous electrode and the operating parameters. (C) 2008 Elsevier B.V. All rights reserved.
语种英语
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WOS记录号WOS:000262947600010
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/102655
专题中国科学院大连化学物理研究所
通讯作者Zhang HM(张华民)
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Lab PEMFC Key Mat & Technol, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
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GB/T 7714
You, Dongjiang,Zhang, Huamin,Chen, Jian,et al. Theoretical analysis of the effects of operational and designed parameters on the performance of a flow-through porous electrode[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY,2009,625(2):165-171.
APA You, Dongjiang,Zhang, Huamin,Chen, Jian,&张华民.(2009).Theoretical analysis of the effects of operational and designed parameters on the performance of a flow-through porous electrode.JOURNAL OF ELECTROANALYTICAL CHEMISTRY,625(2),165-171.
MLA You, Dongjiang,et al."Theoretical analysis of the effects of operational and designed parameters on the performance of a flow-through porous electrode".JOURNAL OF ELECTROANALYTICAL CHEMISTRY 625.2(2009):165-171.
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