Notes on Stefan-Maxwell equation versus Graham's diffusion law

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	Notes on Stefan-Maxwell equation versus Graham's diffusion law
	Mao, ZS
刊名	CHINESE JOURNAL OF CHEMICAL ENGINEERING
	2000-12-01
卷号	8 期号:4 页码:356-360
关键词	ordinary diffusion Stefan-Maxwell equation Graham's law of diffusion theorem of minimum entropy production nonequilibrium thermodynamics
ISSN号	1004-9541
其他题名	Chin. J. Chem. Eng.
中文摘要	Certain prerequisite information on the component fluxes is necessary for solution of the Stefan-Maxwell equation in multicomponent diffusion systems and the Graham's law of diffusion and effusion is often resorted for this purpose. This article addresses solution of the Stefan-Maxwell equation in binary gas systems and explores the necessary conditions for definite solution of concentration profiles and pertinent component fluxes. It is found that there are multiple solutions for component fluxes in contradiction to what specified by the Graham's law of diffusion. The theorem of minimum entropy production in the non-equilibrium thermodynamics is believed instructive in determining the stable steady state solution out of infinite multiple solutions possible under the specified conditions. It is suggested that only when the boundary condition of component concentration is symmetrical in an isothermal binary system, the counter-diffusion becomes equimolar. The Graham's law of diffusion seems not generally valid for the case of isothermal ordinary diffusion.
英文摘要	Certain prerequisite information on the component fluxes is necessary for solution of the Stefan-Maxwell equation in multicomponent diffusion systems and the Graham's law of diffusion and effusion is often resorted for this purpose. This article addresses solution of the Stefan-Maxwell equation in binary gas systems and explores the necessary conditions for definite solution of concentration profiles and pertinent component fluxes. It is found that there are multiple solutions for component fluxes in contradiction to what specified by the Graham's law of diffusion. The theorem of minimum entropy production in the non-equilibrium thermodynamics is believed instructive in determining the stable steady state solution out of infinite multiple solutions possible under the specified conditions. It is suggested that only when the boundary condition of component concentration is symmetrical in an isothermal binary system, the counter-diffusion becomes equimolar. The Graham's law of diffusion seems not generally valid for the case of isothermal ordinary diffusion.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
收录类别	SCI
原文出处	://WOS:000165942500013
语种	英语
WOS记录号	WOS:000165942500013
公开日期	2013-11-15
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/6005]
专题	过程工程研究所_研究所（批量导入）
作者单位	Acad Sinica, Inst Chem Met, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Mao, ZS. Notes on Stefan-Maxwell equation versus Graham's diffusion law[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2000,8(4):356-360.
APA	Mao, ZS.(2000).Notes on Stefan-Maxwell equation versus Graham's diffusion law.CHINESE JOURNAL OF CHEMICAL ENGINEERING,8(4),356-360.
MLA	Mao, ZS."Notes on Stefan-Maxwell equation versus Graham's diffusion law".CHINESE JOURNAL OF CHEMICAL ENGINEERING 8.4(2000):356-360.