A note on permeation with boundary-layer resistance

被引：3

作者：

Ash, R ^{[1
]}

机构：

[1] Imperial Coll, Dept Chem, Phys Chem Labs, London SW7 2AZ, England

来源：

JOURNAL OF MEMBRANE SCIENCE | 2001年 / 186卷 / 01期

关键词：

diffusion; gas and vapour permeation; theory; time-lags;

D O I：

10.1016/S0376-7388(00)00664-5

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

An analytical solution is given to the problem of transport through a slab membrane in the presence of two simple boundary-layer resistances and explicit expressions derived for the time-lags associated with the permeation. The treatment relates to a constant diffusion coefficient. Calculated values of the outgoing 'adsorption' time-lag differ markedly from those obtained by Skaarup and Hansen [Polym. Eng. Sci. 20 (1980) 259] using a numerical procedure. Use of four time-lags allows the solubility/adsorption isotherm to be determined. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：63 / 69

页数：7

共 8 条

[1] MEASUREMENTS OF ADSORPTION FOR MEMBRANES INSITU WITH THE USE OF TIME-LAGS AND STEADY-STATE FLOWS [J].

ASH, R ;

BARRER, RM ;

CHIO, HT ;

EDGE, AVJ .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1979, 365 (1722) :267-281

[2] Transient-state transport in some finite systems .3. Some historical and hitherto largely-unexplored aspects of time-lag theory [J].

Ash, R .

JOURNAL OF MEMBRANE SCIENCE, 1996, 117 (1-2) :79-108

[3] TIME-LAG IN DIFFUSION [J].

ASH, R ;

BARRIE, JA .

JOURNAL OF APPLIED POLYMER SCIENCE, 1986, 31 (05) :1209-1218

[4]

Ash R., 1978, J CHEM SOC F2, P40

[5]

Carslaw H. S., 1959, CONDUCTION HEAT SOLI

[6]

Crank J, 1979, MATH DIFFUSION

[7] NOTE ON A METHOD OF MEASURING DIFFUSION CONSTANTS [J].

JAEGER, JC .

TRANSACTIONS OF THE FARADAY SOCIETY, 1946, 42 (9-10) :615-616

[8] CONCENTRATION-DEPENDENCE, BOUNDARY-LAYER RESISTANCE, AND THE TIME-LAG DIFFUSION-COEFFICIENT [J].

SKAARUP, K ;

HANSEN, CM .

POLYMER ENGINEERING AND SCIENCE, 1980, 20 (04) :259-263

← 1 →