Air Enrichment by Polymeric Magnetic Membranes

The Influence of Magnetic Field on the Enrichment by Polymeric Membranes

“…the polymer membranes (matrix) with dispersed magnetic powder finallymagnetized up to 1.75 mT has been introduced only recently [I. 2,3,4].…”

“…The Time Lag method and 01-08 system were used for analysis of experimental data [2, 4J. Few important diffusion and permeation coefficients, like: D v 15, P were obtained using Time Lag method, whlle D 3 , D., D 5 coefficients were obtained by DI-D8 system [2,4]. Experimental permeation data for the oxygen and nitrogen, both for individual, pure gases, as well as components of air were collected to analyse the system, i.e.…”

On the Analysis of Concentration-Dependent Diffusion Using Transient Sorption and Permeation Measurements by the D1–D8 System

“…It is rather obvious that whatever analysis addressed to experimental data is taken it should deliver either just a value of the diffusion coefficient (ideal case) or its functional dependence on x , c , or t , respectively. For the case of the concentration dependency certain protocols are already available in the literature. ,,,, Some of them rely on the time lag relation provided by, L normala ( l ) = ∫ 0 l ∫ x l c normals ( z ) .25em normald z .25em normald x ∫ 0 c 0 D ( u ) .25em normald u ∫ c normals c 0 D ( u ) d u = x l ∫ 0 c normals D ( u ) .25em normald u with c s ( x ) the stationary concentration distribution within the membrane, which is useful in the case of a known functional form of the diffusion coefficient. Another group of methods covers the early and (less frequently) late time transient symmetrical sorption asymptotics, rarely accompanied by the stationary or nonstationary permeation results (see eqs F 2, F 4, F 5 in Table and eq in the Results and Discussion for further details).…”

Characterization of Selected Parameters of Organic-Inorganic Hybrid Membranes Based on Various Polymers and Nd-Fe-B Fillers

“…We have used the potential difference between magnetic properties of paramagnetic oxygen and diamagnetic nitrogen, what has provided the differentiated conditions (other than sorption-diffusion) in mass transport of the separated gases and given the opportunity for their separation [26][27][28][29][30][31][32]. This paper is the continuation of our earlier works [28][29][30][31][32][33][34], which stated that the incorporation of magnetic micropowders into the polymer matrix (EC, PPO) improved the gas transport properties of produced membranes. In this work, we are going further to exam, the mechanical, rheological and magnetic properties of various magnetic hybrid membranes (EC and PPO with dispersed magnetic powders, like commercial MQP-14-12, MQP-16-7 and MQP-B with a particle size 5, 25 μm and 20-50 μm).…”