Gas Permeation
A New Resistance Model for Interpretation of Gas Permeation Data of Composite and Asymmetric Membranes
... of gas permeation data in composite and asymmetric ...the gas permeation through composite and asymmetric membranes as well as the influence of the effective thickness of substrate on the ...
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Gas Permeation Property of SiC Membrane Using Curing of Polymer Precursor Film by Electron Beam Irradiation in Helium Atmosphere
... the gas permeation property of the membrane was dominated by the imbibition of PCS solution into porous support, not by increase of the thickness of PCS ...
5
Gas Permeation Modeling through a Multilayer Hollow Fiber Composite Membrane
... Unlike the common composite membrane models, in this model the porous support layer is subjected to the feed stream and the dense selective layer is placed on the opposite direction, the permeate side. The governing ...
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Synthesis of Deca Dodecasil 3 Rhombohedral (dd3r) membranes via secondary hydrothermal growth method and their gas permeation performance in CO2 and CH4
... In the present work, DD3R zeolite membranes were synthesized on α -alumina support using dip-coating and vacuum-assisted seeding secondary growth methods, respectively. DD3R seeds were synthesized using two different ...
5
Initial Study of Heterogeneous Catalysts Behaviour and Carrier Gas Permeation with Catalytic Inorganic Ceramic Membrane for Lactic Acid Esterification Applications.
... carrier gas permeation with inorganic ceramic membrane for lactic acid esterification applications was carried ...The permeation properties of inorganic ceramic membrane with the carrier gases were ...
5
Gas permeation properties and characterization of matrimid based carbon tubular membrane
... in gas separation industry due to its highly ...the gas separation ...and gas permeation properties by using scanning electron microscopy (SEM), Fourier transform infrared (FTIR), thermal ...
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Characterization of Commercial Ceramic and Hybrid Membranes Using Gas Permeation and Permporometry Tests
... with gas permeation. Specifically, a non-condensable gas which contains a condensable vapor (at various concentrations up to saturation) is fed to the ...the permeation of the non-condensable ...
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Effect of Heterogeneity of Porous Media on Gas Permeation and Entrapment
... the gas saturation after gas ...on gas permeation and ...injected gas selectively percolated into permeable layers. The gas permeation can hardly occur for the less ...
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Advanced Catalytic Membrane Characterisation and Gas Permeation Properties for Enhanced Ethyl Lactate Conversion
... the gas molecular weight which was in accor- dance with the Knudsen law of diffusion of gases through the pores of the mem- brane, whereas helium gas exhibited a deviation from the linear line [21], sug- ...
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Gas permeation and positron annihilation lifetime spectroscopy of poly(ether imides) containing main chain ethylene oxide segments
... At a molecular level, it is important to understand the effect that polymer chain packing has on the free volume and its distribution, as this controls the physical, mechanical and transport properties [20]. The ...
21
A study to the effect of cobalt doping on hybrid silica membranes
... single gas permeation, multiple gas permeation, X-ray diffraction, infrared spectroscopy and pervaporation ...water gas shift reaction and proved to be stable under wet ...single ...
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Defect Free Nonporous Polyurethane Membrane; Preparation, Characterization And Performance In Gas Separation
... Where J is the membrane permeance[cm 3 (STP)/(cmHg)],V is the volume(cm 3 )of the permeate collected at ambient conditions(temperature To(K) pressure p o (cmHg) over a period of time (s), A the effective area of the ...
20
Enhanced hydrogen separation by vertically-aligned carbon nanotube membranes with zeolite imidazolate frameworks as a selective layer
... Gas permeation experiments were carried out using a variable feed pressure and constant volume permeation system, described ...the gas line and the cell were purged with target gas from ...
8
Synthesis and Seeding Time Effect on the Inter-Crystalline Structure of Hydroxy-Sodalite Zeolite Membranes by Single Gas (H2 and N2) Permeation
... Figs. 5 and 6 show the SEM micrographs of top- views and cross-sections of the prepared membranes via the first route. As can be seen, membrane manufactured with seeding time of 60 s has a more compact and uniform layer. ...
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Development of asymmetric polysulfone and zeolitic imidazole framework 8 mixed matrix membrane for carbon dioxide and methane separation
... and gas separation ...as gas permeation test results showed that the heat-treated ZIF-8 with ~100nm particle size provided good interaction with PSf ...
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A Comparative Study on the Application of Porous PES and PEI Hollow Fiber Membranes in Gas Humidifcation Process
... Since dry jet-wet phase inversion method was used for the fabrication of membrane #M1, the VIPS (Vapor Induced Phase Inversion) process makes a nascent skin layer on the outer surface of the membrane that can hinder the ...
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Enhanced Iontophoretic Delivery of Sumatriptan Succinate from Thermosensitive Gel using Chemical Enhancers
... that was maintained at 37 C ± 1 C using a hot water circulator. Exactly 1 ml of 20% w/v Lutrol F-127 gel containing 200 mg/ml of SS was put into the donor compartment. A pulsatile current of ON: OFF ratio 1:1 was applied ...
7
Perspective Progress and Prospects in Permeation
... Knowledge of permeation is limited by a surprising lack of published I–V curves in asymmetrical solutions. These are important because they are often much more linear than expected from traditional models. ...
10
CURRENT STATUS AND FUTURE INNOVATIONS IN TRANSDERMAL DRUG DELIVERY
... increased permeation following heat treatment has been attributed to an increase in drug diffusivity in the vehicle and an increase in drug diffusivity in the skin due to increased lipid ...
8
Numerical simulations on the front motion of water permeation into anisotropic porous media
... water permeation tests to investigate the water tightness of ...the permeation depth increases rapidly at fi rst and its increase rate decreases ...the permeation depth varies with the water-cement ...
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