Research Abstracts

Polymer membranes including modified clay nanocomposite have been widely used in many applications. One typical group of them, which has more endurance at several conditions, is based on PVDF/modified montmorillonite (MMT) nanocomposite membranes. In this work, thermal behavior of the membranes is i

Equilibrium adsorption/desorption isotherms of organic vapor (MeOH, EtOH, i-PrOH, and Me2CO) at 298 K were measured on two hydrophobic porous coordination polymers, [Zn2(1,4-bdc)2(dabco)]n (1, 1,4-bdc ¼ 1,4-benzenedicarboxylate, dabco ¼ 1,4-diazabicyclo[2.2.2]octane) and [Zn2(1,4-ndc)2(dabco)]n (2,

In this study, the appropriate cell type for periodic boundary conditions (PBC) in CFD analysis for spacerfilled membrane module design was validated by comparing the simulated values of pressure drop with that obtained by experiments. The pressure drop through spacer-filled channel depends on the g

Imaginary amorphous silica membranes were prepared on a computer and gas permeation simulations were conducted using a dual control plane non-equilibrium molecular dynamics (DCP-NEMD) method. The Melt-Quench technique was employed to prepare various types of imaginary amorphous silica membranes whic

The superficial velocity of a submerged module (YEF) was investigated to design better air distribution system. Air from the aerator tends to channel more to center part as the module becomes bigger. A 3-way aerator showed more uniform distribution of air bubbles among the fibers. Therefore, the 3-w

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

This work carries out experiments with BSA (Bovine serum albumin)/yeast mixtures by a flat-channel filter imposed with an electric field to investigate effects of electric field strength and electric field modes on filtration rate and protein transmission. The pseudo-steady-state filtration rate mea

This study establishes a mathematical model that describes the vapor sorption level as a function of its activity in poly(dimethyl siloxane) (PDMS) membrane in multi-component systems. The investigated vapors included polar (methanol, water) and non-polar (m-xylene, toluene, and isopentane) permeant

An equation of rejection curve was derived for a membrane system where the membrane charge strongly affected the partition of ions into the membrane surface. The equation predicted that the rejection varied linearly with the inverse of the volume flow. The equation was applied to the experimental da

The interactions between membrane and particles or among particles were examined based on DLVO theory in order to probe complex membrane fouling phenomena. The strength of the interactions depends on the competition between van der Waals attraction and electrostatic double layer repulsion. An on-lat