Magnetic properties of the magnetic hybrid membranes based on various polymer matrices and inorganic fillers

Rybak, Aurelia; Kaszuwara, W.

doi:10.1016/j.jallcom.2015.06.197

Cited by 36 publications

(23 citation statements)

References 27 publications

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“…Our research group has been conducting research on the application of inorganic-organic hybrid membranes in the separation of gas mixtures. Earlier research concerned membranes based on various polymer matrices such as ethylcellulose (EC), poly(2,6-dimethyl-1,4-phenylene oxide) (PPO), sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (SPPO), linear and hyperbranched polyimides (LPI and HBPI) as well as magnetic powders and iron-encapsulated multi-wall carbon nanotubes (Fe@MWCNT) as inorganic fillers [20][21][22][23][24][25][26][27]. During this research, it was found necessary to have a suitable tool that would allow for the optimal selection of hybrid membrane components.…”

Section: Appl Sci 2018 8 X For Peer Review 2 Of 21mentioning

confidence: 99%

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Modeling of Gas Permeation through Mixed-Matrix Membranes Using Novel Computer Application MOT

Rybak

Sysel

2018

Applied Sciences

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Abstract:The following article proposes a modern computer application MOT (Membrane Optimization Tool) for modeling of gas transport processes through mixed-matrix membranes (MMMs). The current version of the application is based on the Maxwell model, which can be successfully used to model gas transport through the simplest types of hybrid membranes without any defects. The application has been verified on the example of four types of hybrid membranes, consisting of various types of polymer matrix, such as: poly (vinyl acetate), 2, 2 -BAPB + BPADA, Ultem, hyperbranched polyimide (ODPA-MTA) and zeolite 4A. The average absolute relative error (AARE) and root-mean-square error (RMSE) were calculated in order to compare the theoretical MOT-predicted results with the experimental results. It was found that the AARE ranges from 29% to 36%, while the RMSE is in the range of 10% to 29%. The article presents also the comparison of MOT-predicted data obtained with Maxwell and Bruggeman models. To obtain more accurate reproduction of experimental results, further versions of the proposed application will be extended with next-generation permeation models (Lewis-Nielsen, Pal, modified Maxwell or Felske models), allowing for the description of transport in more complex systems with the possibility of taking into account possible defects.

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Section: Appl Sci 2018 8 X For Peer Review 2 Of 21mentioning

confidence: 99%

“…The analyzed gases were fed to the apparatus from compressed gas cylinders. The measurements were performed at 25 • C. The flow-rate and percentage-of-the-air enrichment data were used to evaluate the mass transport coefficients (P and α) [20][21][22][23][24][25][26][27].…”

Section: Characterization Of Mixed-matrix Membranesmentioning

confidence: 99%

Modeling of Gas Permeation through Mixed-Matrix Membranes Using Novel Computer Application MOT

Rybak

Sysel

2018

Applied Sciences

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“…Materials science research has expanded the range of membrane materials that can be applied. Rybak and Kaszuwara (2015) produced magnetic hybrid membrane for air separation based on ethylcellulose (EC), poly(2,6-dimethyl-1,4-phenylene Table 1 Pros and cons of the struvite precipitation (Etter 2009;Huang et al 2016;Le Corre et al 2005) Struvite precipitation…”

Section: Membrane Gas Separationmentioning

confidence: 99%

Nitrogen recovery from wastewater and human urine with hydrophobic gas separation membrane: experiments and modelling

2019

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In agriculture, the human urine could have been used as a natural fertilizer, although there are some problems with the direct utilization, such as the presence of micropollutants in urine, odour and storage of large volume of urine. Therefore, nutrients, such as nitrogen, can be recovered from urine. Continuous flow laboratory membrane reactor was built to investigate nitrogen recovery from wastewater and from human urine. Membrane gas separation method has not been investigated for ammonia recovery from human urine yet. Nitrogen as ammonia gas was recovered in acid using Zeus Aeos™ ePTFE gaspermeable hydrophobic membrane. Acid flux, operating pH, hydraulic retention time and effective membrane surface were experimentally determined. The aim of this work was to verify wastewater experiments in professional flowsheet environment, rigorously modelled with ChemCAD and optimized by dynamic programming optimization method: the membrane separation. Such nitrogen recovery membrane separation has not been published in this professional flowsheet environment yet. The objective function of the process is the ammonia harvesting efficiency. Eighty-five percentage ammonia harvesting efficiency can be reached with 60 membrane surface area/reactor volume ratio, at 35 °C feed temperature with 350 L/m 2 h acid and in 8 h' hydraulic retention time. It can be stated that this separation method is based on physical phenomena without any biological factors. The focus for nitrogen treatment in a wastewater treatment plant is removal instead of recovery. It can be determined that this system is capable for the nitrogen recovery from wastewater, and it can reduce the ammonia content of human urine too.

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“…Precise description of the Time Lag method can be found in our previous papers [26,27,29,35,36]. After integration of J S with respect to time, we have got a downstream absorption permeation Q a (l, t) (total flow of penetrant).…”

Section: And (4)mentioning

confidence: 99%

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

Rybak¹,

Kaszuwara²

2016

Archives of Metallurgy and Materials

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In this paper magnetic organic-inorganic hybrid membranes based on EC, PPO polymer matrices and various magnetic powder microparticles were synthesized and studied. Constant pressure permeation technique and the Time Lag method were used to obtain the gas transport coefficients. The mechanical, rheological and magnetic parameters of magnetic hybrid membranes were examined. It was found that their separation and gas transport properties (D, P, S and α) were improved with the decrease in powder particle size and the increase of membrane’s remanence, saturation magnetization and magnetic particle filling. The increase of the magnetic powder addition and a decrease of its granulation improved also mechanical and rheological parameters of the tested membranes. This improvement also had a positive effect on their gas separation properties and their potential usage in the future.

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Magnetic properties of the magnetic hybrid membranes based on various polymer matrices and inorganic fillers

Cited by 36 publications

References 27 publications

Modeling of Gas Permeation through Mixed-Matrix Membranes Using Novel Computer Application MOT

Modeling of Gas Permeation through Mixed-Matrix Membranes Using Novel Computer Application MOT

Nitrogen recovery from wastewater and human urine with hydrophobic gas separation membrane: experiments and modelling

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

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