Inorganic membranes

In this work we investigate the performance of inorganic membranes in desalination application using a low pressure pervaporation setup. Inorganic membranes were synthesized via a two-step sol–gel catalysed process employing tetraethylorthosilicate as the silica precursor. In addition, non-ligand su

Nanoporous titania membranes, with pore sizes ranging from 1 to several nm, were prepared by sol-gel processing and applied to permeation of hexane as a model nonaqueous solution system. TiO2 membranes showed a deceased hexane flux with an increase in water concentration, which was dissolved in hexa

So far, large scale industrial separations with inorganic membranes and catalytic membrane reactors in process intensification do not exist. Two prominent developments which are near to a commercialization are discussed: perovskite membranes for oxygen separation and zeolite membranes for molecular

The wastewaters generated during the marble processing (cutting and grinding operations), the average flow rates of which are ca. 15 m3/h for a plant producing 45 m2 of polished marble/h, contain a high load of particulate matter. Furthermore, crushed stone operations sometimes use flotation agents,

The technical and economical feasibility of inorganic membranes was evaluated for the dewatering of organic solvents by pervaporation. A mapping of the process industry was carried out in order to examine the most attractive applications. The performance of an amorphous silica membrane was screened

It has been reported that the membrane charge of amphoteric membranes such as inorganic membranes depends on the pH and the electrolyte in the bulk solution. To explain these phenomena, we have proposed the advanced amphoteric membrane (AAM) model where the effective membrane charge is determined by

A new type of ion-selective ceramic membrane with electrically tuneable selectivity is reported. The membrane consists of a conventional supported γ-alumina membrane with porous gold electrodes sputtered on both sides. An electrical potential difference can be applied over the electrodes. The transp