In this work, the concentration process of three different tea extracts (medicinal Rosil No. 6, Black, and Forest Fruit teas) using the osmotic evaporation (OE) process, was studied. The effect of the OE process on the content of phenolic compounds and antioxidant activity was evaluated. The concentration process was carried out in a hollow-fibre membrane contactor with an effective surface are...

A membrane-based gas absorption (MGA) process was evaluated for the removal of volatile organic compounds (VOCs) based on C6H6/N2 mixture. The absorption of C6H6 from a C6H6/N2 mixture was investigated using a hydrophobic polypropylene hollow fiber membrane contactor and the aqueous solution of N-formyl morpholine (NFM) as absorbent. The effects of various factors on the overall mass transfer c...

A tubular porous borosilicate membrane contactor was investigated for ozone gas/water mass transfer and the removal of contaminants emerging concern (CECs) in water. Ozone contact occurs on shell-side, which is coated with a photocatalyst (TiO2-P25), as gas stream fed from lumen side permeates through pores generating micro-sized bubbles uniformly delivered to annular reaction zone where contam...

Abstract Amine absorption processes designed to remove acid gases from gas streams generally face a major challenge of solvent degradation. This degradation leads the formation heat-stable salts (HSS), corrosive agents that irreversibly bind free alkanolamine. The present study proposes, for first time, method HSS perstraction using liquid–liquid membrane contactor allows transfer through porou...

A novel approach using a semipermeable Teflon AF-2400 tube-in-tube membrane contactor was developed for the measurement of gas solubility in organic solvents. This membrane ensures gas saturation of liquids in continuous flow at a specific pressure and temperature. After liquid decompression, the amount of gas outgassed was measured with a bubble meter and used for solubility calculation. The p...

The gas-liquid membrane contactor (GLMC) is a promising alternative gas absorption/desorption configuration for effective carbon dioxide (CO2 ) capture. The physicochemical properties of membranes may synergistically affect GLMC performances, especially during the long-term operations. In this work, commercial polypropylene (PP) and polyvinylidene fluoride (PVDF) hollow fiber (HF) membranes wer...

We describe a new on-line sensitive and selective procedure for the determination of trivalent hexavalent chromium in liquid samples by tailor-made contactor (TMC), specifically membrane annular TMC, coupled with inductively plasma optical detection. The TMC was designed developed to integrate extraction stripping phases analyte one module minimize solvent’s consumption maximize speed transport...

Membrane gas–liquid contactors have been developed to reduce the capital cost and energy consumption of conventional CO2 absorption stripping columns. As a hybrid technology membrane separation amine absorption, these units can improve gas process by generating 400–1500% greater mass transfer area per unit volume leading smaller equipment sizes. Regeneration occur within contactor below boiling...