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题名: Theoretical analysis of the effects of operational and designed parameters on the performance of a flow-through porous electrode
作者: You, Dongjiang1, 2;  Zhang, Huamin1;  Chen, Jian1
通讯作者: 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
发表日期: 2009-01-15
DOI: 10.1016/j.jelechem.2008.10.027
卷: 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
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.
关键词[WOS]: FUEL-CELLS ;  MASS-TRANSFER ;  CARBON FELT ;  MODEL ;  REACTOR
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000262947600010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/102655
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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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

Recommended Citation:
You, Dongjiang,Zhang, Huamin,Chen, Jian. 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.
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