Research Abstracts

The structural, selective and electrokinetic characteristics and percolation parameters were determined for different ion-exchange polymer membranes from their conductivity data using the two-phase model of membrane conductivity and percolation theory. The two different combinations of micro-phases

A comparison of the electrochemical and elastic parameters determined for three dense regenerated cellulose (RC) membranes with different cellulose content is presented in this work. Different values for structural (fractional void volume), electrical (fixed charge concentration and ion transport nu

Changes in morphology and transport parameters for a composite lignosulfonate–polyamide/polysulfone membrane associated with temperature effects were studied. Pore size, pore density and porosity dependence with temperature (25 ≤ t (ºC) ≤ 93) was determined analyzing SEM micrographs, while diffusion

An oxygen transport ceramic membrane was prepared with La0.6Sr0.4TixFe1–xO3–δ (x = 0.2 and 0.3) oxides which was synthesized by polymerized complex method. In order to investigate the effects of Ti substitutions into lanthanum–strontium ferrites, material property, thermal expansion coefficient, oxy

Several membranes are here considered and studied in order to be applied to control of the sugar content of grape musts. This should allow decreasing somewhat the alcohol degree of wines that due to a warmer weather are being made from too mature grapes sometimes. This gives wines with a too high al

Membrane technology has experienced an important development in the last years, being more and more employed as an alternative to conventional separation processes. However, the investment due to purchase and replacement of membranes in industrial plants is still a very significant cost. Therefore,

The characterization and application of cross-flow microfiltration (MF) process as a pre-treatment step and, partly in combination, with cross-flow ultra- (UF), and nanofiltration (NF) systems as final-treatment techniques for efficient treatment of oilfield produced water and different prepared mod

This paper describes the manufacture of tubular ceramic membranes and the study of their performance in the demulsification of soybean oil/water emulsions. The membranes were made by iso-static pressing method and micro and macro structurally characterized by SEM, porosimetry by mercury intrusion an

Self-standing dense membranes from hyperbranched copolyimides based on (hexafluoroisopropylidene)diphthalic anhydride (6FDA), 1,3,5-tris(4-aminophenoxy)benzene (TAPOB) and 4,4´-(hexafluoroisopropylidene)dianiline (6FpDA) were successfully prepared and characterized for physicochemical properties. Th

Sulfur dioxide (SO2) and carbon dioxide (CO2) emissions have to be efficiently controlled due to environmental, economic and social demands. An interesting approach for SO2 and CO2 separation/concentration is the use of supported ionic liquid membranes (SILMs). Ionic liquids (ILs) are very interesti