Pervaporation

This study focused on the removal of toluene from the wastewaters of the chemical industry. The tests were carried out on a polydimethylosiloxane (PDMS) membrane filled with carbon black (PDMS'/cb) and another without the filling (PDMS). It was confirmed, that the addition of the hydrophobic filling

The separation of volatile organic compounds (VOCs) from chemical waste streams containing salts is an interesting pervaporation (PV) application for recovery purposes. In this study, the separation of n -butanol (n BuOH) by PV was investigated, and the influence of temperature, membrane choice, fee

The boehmite-sol-coated membrane was prepared for using the water-repellent characteristics of -AlOOH. The stable boehmite sol was prepared in advance of the coating on the porous membrane surface; the preferred molar ratios of i-PrOH, EAcAc, and H2O to Al(O-sec-Bu)3 for the stable boehmite sol were

The influence of concentration polarization on the pervaporation and separation of VOCs/water mixtures through the PDMS membrane was investigated, using model equation based on the resistance-in-series concept in the boundary layer in feed adjacent to the membrane surface. Dichloromethane, chlorofor

Most of chemical reactions have — as a final result — a large mixture of end products out of which the main one represents a small rate when compared with secondary products. One of these reactions results in a mixture of products that takes place in the process obtaining ethylene amines. The reacti

New strategies are necessary for efficient separation, purification and enrichment in biotechnology, medicine, and food technology as well as in the chemical and petrochemical industries. For such applications novel high-performance materials made by molecular surface engineering (MSE) are required.

Pervaporation, a membrane technology requiring low energetic demands, is considered to substitute the conventional distillation unit employed in the beverage industry in order to recover the key aroma compounds, and that would avoid the damages to the quality of the flavour profile. The analysis of

The increasing contamination of soil and waters with volatile organic compounds, such as halogen derivatives or petrochemical hydrocarbons, poses a serious hazard due to the carcinogenic effect of most of the compounds. Their low concentrations as well as the presence of other hindering substances m

One of the methods of achieving high selectivity or high flux for specific compounds is the modification of membrane such as filling, grafting or coating. The most common is adding fillers, especially high aspect ratio fillers. It improves physical properties such as increased stiffness or reduced c

Pervaporation is a membrane technology utilizing a dense non-porous homogeneous polymeric film as a selective separation barrier. In recent years, pervaporation using dense membranes has emerged as a promising remediation method for trace organic removal from dilute aqueous solutions. The mathematic