oily wastewaters from oil refineries and oil distribution centers are one of the most important environmental concerns in recent decades; therefore, it is critical to treat these types of wastewaters. in this study, the performance of different polyethersulfone hollow fiber membranes in oily wastewaters treatment was investigated and the effects of operating conditions such as transmembrane pre...

New membrane types with well-controlled sub-nanostructures were developed from both polymeric and inorganic materials: carbon-based membranes, functionalized mesoporous oxide membranes and molecular sieving zeolite membranes. Regarding the carbon membranes, a novel carbon membrane with enhanced CO2 affinity was developed. The prepared membrane had a higher separation performance than that of th...

Macromolecular networks consisting of homogeneously distributed covalently bonded inorganic and organic precursors are anticipated to show remarkable characteristics, distinct from those of the individual constituents. A novel hyper-cross-linked ultrathin membrane is presented, consisting of a giant molecular network of alternating polyhedral oligomeric silsesquioxanes and aromatic imide bridge...

   Graphene oxide nanosheet (GONS) can be a suitable membrane for gas separation with high permeability and selectivity. Separation of N2/CO2 using functionalized GONS was investigated by molecular dynamics simulations. The simulated systems were comprised of two types of GONS with a pore in their center, N2 and CO2 molecules. The selectivity and ...

Membrane distillation (MD) is a promising hybrid thermal-membrane separation technology that can efficiently produce freshwater from seawater or contaminated wastewater. However, the relatively low flux and presence of fouling wetting agents in feed solution negate applicability MD for long term operation. In recent years, 'two-faced' membranes Janus have shown potential to decrease problem com...

Membrane separation is an emerging technology for secondary effluent (SE) recycling as alternative water source. However, SE contains metabolites which form a film on membrane surfaces, leading to decrease in hydraulic capacity. This extensive study of the effect fouling UF performance, with detailed analysis foulants composition and morphology, evaluation most effective – either physical or ch...

Hydrogen (H2) is known for its clean energy characteristics. Its separation and purification to produce high-purity H2 becoming essential promoting a economy. There are several technologies, such as pressure swing adsorption, membrane, cryogenic, which can be adopted H2; however, each standalone technology has own pros cons. Unlike technology, the integration of technologies shown significant p...

This work aims at the development of a dynamic model for the mathematical description of facilitated transport separation processes carried out in membrane contactors where mass transport phenomena are coupled with chemical reactions. A general model that takes into account the description of all possible mass transport steps and interfacial chemical reactions is initially presented, allowing i...