Highly steam-stable CHA-type zeolite imidazole framework ZIF-302 membrane for hydrogen separation

2022 ◽  
Vol 281 ◽  
pp. 119875
Author(s):  
Haiqian Lian ◽  
Eryue Song ◽  
Bin Bao ◽  
Wenhe Yang ◽  
Yu Yang ◽  
...  
Keyword(s):  
Hydrogen Separation ◽  
Type Zeolite

scholarly journals MFI-type zeolite membrane on hollow fiber substrate for hydrogen separation

2011 ◽  
Vol 56 (23) ◽  
pp. 2416-2418 ◽  
Author(s):  
WenHui Yuan ◽  
DeLin Wang ◽  
Li Li
Keyword(s):  
Hollow Fiber ◽  
Hydrogen Separation ◽  
Zeolite Membrane ◽  
Type Zeolite

Molecular dynamics studies on thermal behavior of an MFI-type zeolite

1995 ◽  
Vol 23 (4) ◽  
pp. 397-402 ◽  
Author(s):  
K. Yamahara ◽  
K. Okazaki ◽  
K. Kawamura
Keyword(s):  
Molecular Dynamics ◽  
Thermal Behavior ◽  
Type Zeolite

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.

Diffusion of phenolic compounds within high-silica MFI-type zeolite in the mesitylene solution

2021 ◽  
Vol 319 ◽  
pp. 111044
Author(s):  
Xinluona Su ◽  
Yuta Nakasaka ◽  
Ren Moriwaki ◽  
Takuya Yoshikawa ◽  
Takao Masuda
Keyword(s):  
Phenolic Compounds ◽  
Type Zeolite ◽  
High Silica

scholarly journals Synthesis of Zeolite from Fly Ash and Removal of Heavy Metal Ions from Newly Synthesized Zeolite

2010 ◽  
Vol 7 (4) ◽  
pp. 1200-1205 ◽  
Author(s):  
Parag Solanki ◽  
Vikal Gupta ◽  
Ruchi Kulshrestha
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Coal Fly Ash ◽  
Proximate Analysis ◽  
13X Zeolite ◽  
Alkali Fusion ◽  
Type Zeolite ◽  
The Cost

Coal fly ash was used to synthesize X-type zeolite by alkali fusion followed by hydrothermal treatment. Characteristics of the various Fly ash samples were carried out. Coal proximate analysis was done. Batch experiment was carried out for the adsorption of some heavy metal ions on to synthesized Zeolite. The cost of synthesized zeolite was estimated to be almost one-fifth of that of commercial 13X zeolite available in the market.

scholarly journals Hydrogen Separation and Purification from Various Gas Mixtures by Means of Electrochemical Membrane Technology in the Temperature Range 100–160 °C

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 282
Author(s):  
Leandri Vermaak ◽  
Hein W. J. P. Neomagus ◽  
Dmitri G. Bessarabov
Keyword(s):  
Hydrogen Permeability ◽  
Gas Mixtures ◽  
Open Circuit ◽  
Hydrogen Separation ◽  
Proton Exchange ◽  
Limiting Current ◽  
Separation Performance ◽  
Separation And Purification ◽  
Irreversible Damage ◽  
Temperature Range

This paper reports on an experimental evaluation of the hydrogen separation performance in a proton exchange membrane system with Pt-Co/C as the anode electrocatalyst. The recovery of hydrogen from H2/CO2, H2/CH4, and H2/NH3 gas mixtures were determined in the temperature range of 100–160 °C. The effects of both the impurity concentration and cell temperature on the separation performance of the cell and membrane were further examined. The electrochemical properties and performance of the cell were determined by means of polarization curves, limiting current density, open-circuit voltage, hydrogen permeability, hydrogen selectivity, hydrogen purity, and cell efficiencies (current, voltage, and power efficiencies) as performance parameters. High purity hydrogen (>99.9%) was obtained from a low purity feed (20% H2) after hydrogen was separated from H2/CH4 mixtures. Hydrogen purities of 98–99.5% and 96–99.5% were achieved for 10% and 50% CO2 in the feed, respectively. Moreover, the use of proton exchange membranes for electrochemical hydrogen separation was unsuccessful in separating hydrogen-rich streams containing NH3; the membrane underwent irreversible damage.

scholarly journals Silver quasi-nanoparticles: bridging the gap between clusters molecular-like and plasmonic nanoparticles

2021 ◽  
Author(s):  
Fatima Douma ◽  
Louwanda Lakiss ◽  
Oleg I. Lebedev ◽  
Julien Cardin ◽  
Krassimir L. Kostov ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Plasmonic Nanoparticles ◽  
Zeolite X ◽  
New Strategy ◽  
Type Zeolite ◽  
Optical Behavior ◽  
Silver Cations

Herein, we report a new strategy for preparing connected silver sub-nanoparticles with unique optical behavior via a selective photo-assisted electrochemical reduction of silver cations in FAU-type zeolite X (FAUX) cages....

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