A new permeation apparatus is described to measure the liquid permeability of coated and uncoated paper samples. The technique can also be applied to other consolidated porous and laminate materials and removes the artefacts of random pinholes whilst relating directly to liquid permeation rather than the more commonly used air/gas permeation. Measurements from three example papers are shown, an...

Different membranes covering the macroporous to nano-pororous range and having different porosities have been used study mass transfer of methane carbon dioxide single gases. The effect flow parameters on transport mechanisms through porous were reviewed in detail. characteristics gas macroporous, microporous, nano-porous investigated with several diffusion models 20–100 ◦C at pressure differen...

Amorphous polymers are often used for gas separation but have a trade-off between permeability and selectivity. Here, the effect of chemical composition temperature on solubility in well-ordered LC polymer membranes is investigated. Membranes with various compositions monomethacrylate (M1) crown ether functionality to enhance CO2 smectic diacrylate (M2) cross-linker were fabricated, while all h...

a broad range of per-meation events from femtoseconds to minutes in time scale and sub-angstrom to millimeter in space were discussed. A main message in the Perspectives was to explore each discipline to expand its limitation, such that different levels of knowledge in a hierarchy of ion permeation events are integrated. Here, we propose another approach from a mesoscopic point of view. Electro...

In this paper the efficiency of a method for the separation and identification of pesticides in lanolin is presented. Theses pesticides belong to the organophosphorous and synthetic pyrethroids families. After the gel permeation chromatography, pesticides are separated from lanolin into two fractions corresponding to the two families, which simplify subsequent analysis by gas chromatography.

A ZIF-9-67 hybrid membrane on α-Al(2)O(3) support was prepared using mixed-linker synthesis. The gas permeation and selectivity data demonstrate that this membrane may have potential applications for efficient CO(2) capture from several industrial mixtures.

The concept of splayed, hyperthin polyelectrolyte multilayers (PEMs) is introduced in which a bulky, hydrophilic and charged pendant group is used to increase the gas permeability of a PEM without reducing its permeation selectivity. Proof of principle studies are reported using nm-thick PEMs made from poly(sodium 4-styrene sulfonate) () and poly(allylamine hydrochloride) () bearing bulky cobal...

Membranes are attractive for upgrading natural gas; however, the gas permeation processes through membranes challenging to control. The coexistence of condensable H2S and CO2 typically causes membrane performance decline under practical feed conditions, due uncontrolled penetrant competition undesired plasticization polymer matrix. In this paper, we report a strategy successfully transform thes...

The time-lag method, using a gas permeation experiment, is currently the most popular method for determining the membrane properties: diffusivity coefcient and permeability coefcient, and from which the solubility coefcient can be calculated. In this investigation, the impact of systematic, random (noise), resolution and extrapolation errors associated with gas permeatio...

of a paper to be present at the March 2004 meeting of American Physical Society. These abstracts can be seen at the APS web site: http://www.eps.org/aps/meet/MAR03/baps/abs/S9530.html 28) J.Bockris “Early Contributions From Workers at Texas A&M University to (So-Caled) Low Energy Nuclear Reactions.”Journal of New Energy, Vol 4, no 2, 1999, p. 40 29) J. Bockris, G. Lin, and N. Packham " A Review...