Selective water vapor permeation from steam/non-condensable gas mixtures via organosilica membranes at moderate-to-high temperatures

2019 ◽  
Vol 589 ◽  
pp. 117254 ◽  
Author(s):  
Norihiro Moriyama ◽  
Hiroki Nagasawa ◽  
Masakoto Kanezashi ◽  
Toshinori Tsuru
Keyword(s):  
Water Vapor ◽  
High Temperatures ◽  
Gas Mixtures ◽  
Vapor Permeation ◽  
Water Vapor Permeation

The Effect of Thermal Reduction on the Water Vapor Permeation in Graphene Oxide Membranes

2014 ◽  
Vol 1 (8) ◽  
pp. 1400250 ◽  
Author(s):  
Konstantinos S. Andrikopoulos ◽  
Giannis Bounos ◽  
Dimitrios Tasis ◽  
Lamprini Sygellou ◽  
Vassilios Drakopoulos ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Water Vapor ◽  
Thermal Reduction ◽  
Vapor Permeation ◽  
Oxide Membranes ◽  
Water Vapor Permeation ◽  
Graphene Oxide Membranes

Water vapor permeation behavior of interfacially polymerized polyamide thin film on hollow fiber membrane substrate

2016 ◽  
Vol 60 ◽  
pp. 623-635 ◽  
Author(s):  
Muhammad Irshad Baig ◽  
Pravin G. Ingole ◽  
Won Kil Choi ◽  
Seong Ryong Park ◽  
Eun Chul Kang ◽  
...  
Keyword(s):  
Thin Film ◽  
Water Vapor ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Fiber Membrane ◽  
Vapor Permeation ◽  
Water Vapor Permeation

scholarly journals Desiccant Films Made of Low-Density Polyethylene with Dispersed Silica Gel—Water Vapor Absorption, Permeability (H2O, N2, O2, CO2), and Mechanical Properties

Materials ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2304 ◽  
Author(s):  
Sängerlaub ◽  
Kucukpinar ◽  
Müller
Keyword(s):  
Water Vapor ◽  
Silica Gel ◽  
Water Vapor Pressure ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Water Vapor Absorption ◽  
Vapor Permeation ◽  
Vapor Absorption ◽  
Effective Water ◽  
Water Vapor Permeation

Silica gel is a well-known desiccant. Through dispersion of silica gel in a polymer, films can be made that absorb and desorb water vapor. The water vapor absorption becomes reversible by exposing such films to a water vapor pressure below that of the water vapor pressure during absorption, or by heating the film. The intention of this study was to achieve a better understanding about the water vapor absorption, permeability (H2O, N2, O2, CO2), and mechanical properties of films with dispersed silica gel. Low-density polyethylene (PE-LD) monolayer films with a nominal silica gel concentration of 0.2, 0.4, and 0.6 g dispersed silica gel per 1 g film (PE-LD) were prepared and they absorbed up to 0.08 g water vapor per 1 g of film. The water vapor absorption as a function of time was described by using effective diffusion coefficients. The steady state (effective) water vapor permeation coefficients of the films with dispersed silica gel were a factor of 2 to 14 (8.4 to 60.2·10−12 mg·cm·(cm²·s·Pa)−1, 23 °C) higher than for pure PE-LD films (4.3·10−12 mg·cm·(cm²·s·Pa)−1, 23 °C). On the other hand, the steady state gas permeabilities for N2, O2, and CO2 were reduced to around one-third of the pure PE-LD films. An important result is that (effective) water vapor permeation coefficients calculated from results of sorption and measured by permeation experiments yielded similar values. It has been found that it is possible to describe the sorption and diffusion behavior of water by knowing the permeability coefficient and the sorption capacity of the film (Peff.≈Seff.·Deff.). The tensile stress changed only slightly (values between 10 and 14 N mm−²), while the tensile strain at break was reduced with higher nominal silica gel concentration from 318 length-% (pure PE-LD film) to 5 length-% (PE-LD with 0.6 g dispersed silica gel per 1 g film).

Water vapor permeation through topical films on a moisture‐releasing skin Model

2020 ◽  
Author(s):  
Fatemeh Keshavarzi ◽  
Saeed Zajforoushan Moghaddam ◽  
Malene Barré Pedersen ◽  
Nina Østergaard Knudsen ◽  
Shadi Jafarzadeh ◽  
...  
Keyword(s):  
Water Vapor ◽  
Skin Model ◽  
Vapor Permeation ◽  
Water Vapor Permeation

Water vapor permeation and compressed air dehydration performances of modified polyimide membrane

2008 ◽  
Vol 60 (3) ◽  
pp. 330-334 ◽  
Author(s):  
Guo Min Li ◽  
Chunsheng Feng ◽  
Jun Feng Li ◽  
Jing Zhi Liu ◽  
Yong Lie Wu
Keyword(s):  
Water Vapor ◽  
Compressed Air ◽  
Polyimide Membrane ◽  
Vapor Permeation ◽  
Air Dehydration ◽  
Water Vapor Permeation

Water vapor permeation and its influence on gases through a zeolite-4A membrane

2019 ◽  
Vol 574 ◽  
pp. 154-163 ◽  
Author(s):  
Pasquale F. Zito ◽  
Adele Brunetti ◽  
Alessio Caravella ◽  
Enrico Drioli ◽  
Giuseppe Barbieri
Keyword(s):  
Water Vapor ◽  
Vapor Permeation ◽  
Zeolite 4A ◽  
Water Vapor Permeation
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