Theoretical analysis of the effects of operational and designed parameters on the performance of a flow-through porous electrode

	Theoretical analysis of the effects of operational and designed parameters on the performance of a flow-through porous electrode
	You, Dongjiang 1,2; Zhang, Huamin 1; Chen, Jian 1
刊名	journal of electroanalytical chemistry
	2009-01-15
卷号	625 期号:2 页码:165-171
关键词	Flow-through porous electrode Two-dimensional mathematical model Dimensionless parameters Mass transport Ohmic resistance Kinetics
通讯作者	张华民
产权排序	1;1
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.
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
收录类别	SCI
原文出处	false
语种	英语
WOS记录号	WOS:000262947600010
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/102655]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
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
推荐引用方式 GB/T 7714	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.
APA	You, Dongjiang,Zhang, Huamin,&Chen, Jian.(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.