scholarly journals Structure and Transport Properties of Mixed-Matrix Membranes Based on Polyimides with ZrO2 Nanostars

Polymers ◽  
2016 ◽  
Vol 8 (11) ◽  
pp. 403 ◽  
Author(s):  
Maria Sokolova ◽  
Michael Smirnov ◽  
Pavel Geydt ◽  
Alexander Bugrov ◽  
Sami-Seppo Ovaska ◽  
...  
Keyword(s):  
Transport Properties ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Matrix Membranes

scholarly journals Mixed Matrix Membranes Comprising of ZIF-8 Nanofillers for Enhanced Gas Transport Properties

2016 ◽  
Vol 148 ◽  
pp. 1259-1265 ◽  
Author(s):  
Norwahyu Jusoh ◽  
Yin Fong Yeong ◽  
Kok Keong Lau ◽  
Azmi Mohd Shariff
Keyword(s):  
Transport Properties ◽  
Gas Transport ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Gas Transport Properties ◽  
Matrix Membranes

scholarly journals Gas Transport in Mixed Matrix Membranes: Two Methods for Time Lag Determination

Computation ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 28 ◽  
Author(s):  
Alessio Fuoco ◽  
Marcello Monteleone ◽  
Elisa Esposito ◽  
Rosaria Bruno ◽  
Jesús Ferrando-Soria ◽  
...  
Keyword(s):  
Transport Properties ◽  
Gas Transport ◽  
Time Lag ◽  
Effective Diffusion ◽  
Gas Permeation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Mixed Gas ◽  
Fitting Procedure ◽  
Matrix Membranes

The most widely used method to measure the transport properties of dense polymeric membranes is the time lag method in a constant volume/pressure increase instrument. Although simple and quick, this method provides only relatively superficial, averaged data of the permeability, diffusivity, and solubility of gas or vapor species in the membrane. The present manuscript discusses a more sophisticated computational method to determine the transport properties on the basis of a fit of the entire permeation curve, including the transient period. The traditional tangent method and the fitting procedure were compared for the transport of six light gases (H2, He, O2, N2, CH4, and CO2) and ethane and ethylene in mixed matrix membranes (MMM) based on Pebax®1657 and the metal–organic framework (MOF) CuII2(S,S)-hismox·5H2O. Deviations of the experimental data from the theoretical curve could be attributed to the particular MOF structure, with cavities of different sizes. The fitting procedure revealed two different effective diffusion coefficients for the same gas in the case of methane and ethylene, due to the unusual void morphology in the MOFs. The method was furthermore applied to mixed gas permeation in an innovative constant-pressure/variable-volume setup with continuous analysis of the permeate composition by an on-line mass-spectrometric residual gas analyzer. This method can provide the diffusion coefficient of individual gas species in a mixture, during mixed gas permeation experiments. Such information was previously inaccessible, and it will greatly enhance insight into the mixed gas transport in polymeric or mixed matrix membranes.

Butane isomer transport properties of 6FDA–DAM and MFI–6FDA–DAM mixed matrix membranes

2009 ◽  
Vol 343 (1-2) ◽  
pp. 157-163 ◽  
Author(s):  
Junqiang Liu ◽  
Tae-Hyun Bae ◽  
Wulin Qiu ◽  
Shabbir Husain ◽  
Sankar Nair ◽  
...  
Keyword(s):  
Transport Properties ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Matrix Membranes
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