Effect of added NaX nano-zeolite into polyamide as a top thin layer of membrane on water flux and salt rejection in a reverse osmosis process

Design of poly(1-hexadecene-sulfone)/poly(1,4-phenylene sulfide) membrane containing nano-zeolite and carbon nanotube for gas separation

“…The Si-CH 2 functional group due to zeolite structure was apparent at 1242 cm -1 . Similarly, peaks at 1005 and 665 cm -1 correspond to Si-O asymmetric and symmetric stretching vibrations in the spectrum [30]. The peak for Si-Al-O was also observed at 1038 cm -1 .…”

Polycarbonate/Polypropylene-Graft-Maleic Anhydride and Nano-Zeolite-Based Nanocomposite Membrane: Mechanical and Gas Separation Performance

“…The peak at 1250 cm -1 was the characteristic of Si−CH 2 functional group. The asymmetric and symmetric Si−O stretching vibrations appeared at 1009 and 670 cm -1 [28]. Moreover, the peak for Si−Al−O appeared at 1030 cm -1 .…”

A recent progress in thin film composite membrane: A review

“…This improved membrane water process is just as effective as current technology but more energy efficient and potentially less expensive. In order to further enhance water molecules transport rate, Fathizadeh et al [50] in year 2011 impregnated bigger pore size of zeolite NaX (7.4 Å) in the thin film layer with the aims of creating larger molecular tunnels for water to flow. It is found that this particular pore size of zeolite offers preferential flow paths for water molecules of 2.7 Å in diameter but restricts the permeation of hydrated sodium and chloride ions (8-9 Å).…”