The Effects of CO2-Conditioning of Polymers on Positron Annihilation and Gas Permeation Properties

1995 ◽  
Vol 68 (11) ◽  
pp. 3011-3017 ◽  
Author(s):  
Kazuhiro Tanaka ◽  
Masamichi Ito ◽  
Hidetoshi Kita ◽  
Ken-ichi Okamoto ◽  
Yasuo Ito
Keyword(s):  
Positron Annihilation ◽  
Gas Permeation ◽  
Co2 Conditioning ◽  
Permeation Properties

scholarly journals Gas Permeation Properties of High-Silica CHA-Type Zeolite Membrane

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 249
Author(s):  
Yasuhisa Hasegawa ◽  
Chie Abe ◽  
Mayumi Natsui ◽  
Ayumi Ikeda
Keyword(s):  
Molecular Size ◽  
Gas Permeation ◽  
Zeolite Membrane ◽  
Type Zeolite ◽  
High Silica ◽  
Separation Of Co2 ◽  
Α Al2o3 ◽  
Separation Performances ◽  
Molecular Sieving ◽  
Permeation Properties

The polycrystalline CHA-type zeolite layer with Si/Al = 18 was formed on the porous α-Al2O3 tube in this study, and the gas permeation properties were determined using single-component H2, CO2, N2, CH4, n-C4H10, and SF6 at 303–473 K. The membrane showed permeation behavior, wherein the permeance reduced with the molecular size, attributed to the effect of molecular sieving. The separation performances were also determined using the equimolar mixtures of N2–SF6, CO2–N2, and CO2–CH4. As a result, the N2/SF6 and CO2/CH4 selectivities were as high as 710 and 240, respectively. However, the CO2/N2 selectivity was only 25. These results propose that the high-silica CHA-type zeolite membrane is suitable for the separation of CO2 from CH4 by the effect of molecular sieving.

scholarly journals The Effect of Extrusion Conditions and Material Properties on the Gas Permeation Properties of LDPE/LLDPE Silage Wrap Films

2005 ◽  
Vol 21 (1) ◽  
pp. 27-38 ◽  
Author(s):  
Gerry M. McNally ◽  
Christopher Laffin ◽  
P. D. Forristal ◽  
Padraig O’Kiely ◽  
Christopher M. Small
Keyword(s):  
Material Properties ◽  
Gas Permeation ◽  
Permeation Properties

Synthesis and gas permeation properties of silicalite-1 zeolite membrane

1998 ◽  
Vol 41 (3) ◽  
pp. 325-330 ◽  
Author(s):  
Xiaochun Xu ◽  
Mojie Cheng ◽  
Weishen Yang ◽  
Liwu Lin
Keyword(s):  
Gas Permeation ◽  
Zeolite Membrane ◽  
Permeation Properties

Effect of Fumed Silica Nanoparticles on the Gas Permeation Properties of Substituted Polyacetylene Membranes

2006 ◽  
Vol 58 (5-6) ◽  
pp. 995-1003 ◽  
Author(s):  
Toshiki Kono ◽  
Yanming Hu ◽  
Toshio Masuda ◽  
Katsuchisa Tanaka ◽  
Rodney D. Priestley ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Fumed Silica ◽  
Gas Permeation ◽  
Fumed Silica Nanoparticles ◽  
Permeation Properties

scholarly journals Effect of heating rates on the microstructure and gas permeation properties of carbon membranes

2018 ◽  
Vol 14 (3) ◽  
pp. 378-381
Author(s):  
Norazlianie Sazali ◽  
Wan Norharyati Wan Salleh ◽  
Ahmad Fauzi Ismail ◽  
Kumaran Kadirgama ◽  
Mohamad Shahrizan Moslan ◽  
...  
Keyword(s):  
Heating Rate ◽  
High Performance ◽  
Room Temperature ◽  
Gas Permeation ◽  
Carbon Membrane ◽  
Heating Rates ◽  
Polymer Blending ◽  
Carbon Membranes ◽  
Permeation Properties ◽  
Fine Turning

High performance tubular carbon membrane (TCM’s) for CO2 separation were prepared by controlling the carbonization heating rates in range of 1-7 oC/min carbonized at 800 oC under Argon environment. A single permeation apparatus was used to determine the gas permeation properties of the membrane at room temperature. Fine turning of the carbonization condition was necessary to obtain the desired permeation properties. The preparation of PI/NCC-based TCM at low heating rate caused the gas permeance for the examined gas N2 and CO2 decreased whereas the selectivity of CO2/N2 increased. It was also identified that the gas permeation properties of the resultant TCM and its structure was highly affected by the heating rate. The best carbonization heating rate was found at 3oC/min for the fabrication of TCM derived via polymer blending of PI/NCC for CO2/N2 separation.

Solution-processable methyl-substituted semi-alicyclic homo- and co-polyimides and their gas permeation properties

Polymer ◽  
2018 ◽  
Vol 145 ◽  
pp. 95-100 ◽  
Author(s):  
So-Ra Shin ◽  
Su-Young Moon ◽  
Chae-Young Park ◽  
Bong-Jun Chang ◽  
Jeong-Hoon Kim
Keyword(s):  
Gas Permeation ◽  
Solution Processable ◽  
Permeation Properties
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