Sorption Kinetics of Water Vapor in Wool Fibers: Evaluation of Diffusion Coefficients and Analysis of Integral Sorption

1960 ◽  
Vol 30 (10) ◽  
pp. 761-770 ◽  
Author(s):  
P. Nordon ◽  
B.H. Mackay ◽  
J.G. Downes ◽  
G.B. McMahon
Keyword(s):  
Water Vapor ◽  
Diffusion Coefficients ◽  
Sorption Kinetics ◽  
Wool Fibers ◽  
Kinetics Of

Sorption kinetics of water vapor in wool fibers

1958 ◽  
Vol 28 (116) ◽  
pp. 45-67 ◽  
Author(s):  
J. G. Downes ◽  
B. H. Mackay
Keyword(s):  
Water Vapor ◽  
Sorption Kinetics ◽  
Wool Fibers ◽  
Kinetics Of

Sorption Kinetics of High Pressure Gases in Polymeric Tubing Materials

2006 ◽  
Author(s):  
P. Jaeger ◽  
S. Buchner ◽  
R. Eggers
Keyword(s):  
Diffusion Coefficients ◽  
Gas Permeability ◽  
Gravimetric Method ◽  
Sorption Kinetics ◽  
Operating Pressure ◽  
Gas Solubility ◽  
Atmospheric Conditions ◽  
High Solubility ◽  
Industrial Practice ◽  
Kinetics Of

A gravimetric method was applied to determine the sorption kinetics of gases into polymers. Diffusivity as well as sorption capacity are determined directly. Data of gas permeability that are required for calculating leakage rates in polymeric flexile gas and oil ducts may be retrieved by multiplying the obtained diffusion coefficients and the gas solubility. In general carbon dioxide enters polymers to the highest extent. In industrial practice, the high solubility of CO2 e.g. may lead to explosive decompression of sealings once the operating pressure is reduced to atmospheric conditions. Diffusion coefficients are presented in the range of 75 to 130°C at 2 to 30 MPa.

Water vapor sorption kinetics of polymer based sorbents: Theory and experiments

2016 ◽  
Vol 106 ◽  
pp. 192-202 ◽  
Author(s):  
Muhammad Sultan ◽  
Ibrahim I. El-Sharkawy ◽  
Takahiko Miyazaki ◽  
Bidyut B. Saha ◽  
Shigeru Koyama ◽  
...  
Keyword(s):  
Water Vapor ◽  
Sorption Kinetics ◽  
Water Vapor Sorption ◽  
Vapor Sorption ◽  
Kinetics Of ◽  
Theory And Experiments

Sorption kinetics of cesium on hydrous titanium dioxide

2003 ◽  
Vol 91 (10) ◽  
Author(s):  
Y. Altaş ◽  
H. Tel ◽  
G. Yaprak
Keyword(s):  
Titanium Dioxide ◽  
Ion Exchange ◽  
Exchange Rates ◽  
Diffusion Coefficients ◽  
Isotopic Exchange ◽  
Sorption Kinetics ◽  
Cesium Ions ◽  
Ion Exchange Reaction ◽  
Titanium Dioxides ◽  
Kinetics Of

SummaryTwo types of hydrous titanium dioxide possessing different surface properties were prepared and characterized to study the sorption kinetics of cesium. The effect of pH on the adsorption capacity were determined in both type sorbents and the maximum adsorption percentage of cesium were observed at pH 12. To elucidate the kinetics of ion-exchange reaction on hydrous titanium dioxide, the isotopic exchange rates of cesium ions between hydrous titanium dioxides and aqueous solutions were measured radiochemically and compared with each other. The diffusion coefficients of Cs

Water vapor sorption kinetics of wood modified with glutaraldehyde

2010 ◽  
pp. NA-NA ◽  
Author(s):  
Yanjun Xie ◽  
Callum A. S. Hill ◽  
Zefang Xiao ◽  
Zaihan Jalaludin ◽  
Holger Militz ◽  
...  
Keyword(s):  
Water Vapor ◽  
Sorption Kinetics ◽  
Water Vapor Sorption ◽  
Vapor Sorption ◽  
Kinetics Of

scholarly journals Water Vapor Permeability through Porous Polymeric Membranes with Various Hydrophilicity as Synthetic and Natural Barriers

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 282 ◽  
Author(s):  
Chalykh Anatoly ◽  
Zolotarev Pavel ◽  
Chalykh Tatiana ◽  
Rubtsov Alexei ◽  
Zolotova Svetlana
Keyword(s):  
Water Vapor ◽  
Diffusion Coefficients ◽  
Food Packaging ◽  
Effective Diffusion ◽  
Water Vapor Permeability ◽  
Sorption Kinetics ◽  
Polymeric Membranes ◽  
Vapor Permeability ◽  
Dispersive Model ◽  
Apparent Activation Energies

The article is devoted to the analysis of sorption kinetics, permeability, and diffusion of water vapor in porous polymeric membranes of different hydrophilicities and through-porosities. The water transport measurement with a constant gradient of partial pressure allows the authors to obtain reliable characteristics for porous membranes, films, artificial leathers, and fabrics of various chemical natures (synthetic and bio-based) and phase structures. All the kinetic permeability curves were determined and effective diffusion coefficients, as well as their apparent activation energies, were calculated at the stationary and non-stationary stages of the mass transfer. The relationship between the sorption–diffusion characteristics of the polymer barriers and their vapor permeability is traced. Within the framework of a Zolotarev–Dubinin dual dispersive model, an analytical equation is obtained that relates permeability to diffusion coefficients of water vapor in the pore volume, polymer skeleton material using such characteristics as porosity and the solubility coefficient. It is proposed to use this equation to predict the sorption properties for barrier and porous materials of complex architecture specifically in food packaging.

Modeling of sorption kinetics of U(VI) micro-quantities nanostructured materials with anatase mesoporous structures

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Veniamin Zheleznov ◽  
Aleksey Golikov ◽  
Tatiana Sokolnitskaya ◽  
Sergey Ivannikov
Keyword(s):  
Nanostructured Materials ◽  
Sorption Kinetics ◽  
Uranyl Ion ◽  
Competitive Sorption ◽  
Hydroxyl Groups ◽  
Complex Ions ◽  
The Stability ◽  
Kinetics Of ◽  
Mesoporous Structures ◽  
Ionic Forms

Abstract The sorption kinetics of uranyl ions micro-quantities from fluoride solutions by nanostructured materials with anatase mesoporous structures has been studied. Using the model of competitive sorption of ions and positively charged complexes of uranyl ion on deprotonated hydroxyl groups of an anatase, kinetic curves of changes in the ratio of ionic forms of uranium in solution were calculated. Modeling was carried out under the assumption of a two-stage mechanism of uranium complex ions sorption. The modeling considered the influence of the uranyl ion carbonate complexes formation. The shift in equilibrium among ionic forms of uranyl correlates with the stability of the complexes in solution.

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