Please login first
Hybrid Inorganic-Organic Membranes Based on Iron-Encapsulated Carbon Nanotubes and Their Application in CO2 Separation
* 1 , 1 , 1 , 1 , 2
1  Silesian University of Technology
2  Warsaw University of Technology
Academic Editor: Ullrich Scherf

Published: 22 April 2022 by MDPI in 3rd International Online-Conference on Nanomaterials session Poster

Nowadays, considering the problems with climate change and global warming caused by the increase in greenhouse gas emissions, mainly CO2, (mainly from energy production and transport), there was a need to reduce it. Conventional methods are very energy intensive. Therefore, alternative methods, such as membrane technologies and appropriate materials, are being searched for. In this work, we present the new data concerning the novel type of hybrid organic-inorganic membranes Fe@MWCNT-OH/FeSPEEK with a new kind of CNTs with increased iron-encapsulated content, characterization of their magnetic, mechanical, thermal, gas transport parameters, and their potential application in CO2 separation. It was found that incorporation of nanofillers with increased iron content (5.80 wt%) into the modified polymer matrix had significantly improved magnetic, thermal, mechanical, and gas transport (D, P, S, and αCO2/N2) parameters of analyzed membranes, especially after application of magnetic casting and chemical modification of inorganic and organic phase. Magnetic casting has improved the alignment and dispersion of Fe@MWCNTs. At the same time, CNT's and polymer chemical modification increased interphase compatibility, CO2 affinity and membrane’s separation efficiency. The obtained novel composites were characterized by improved thermooxidative stability, mechanical (extremely especially important in high-pressure processes), and magnetic parameters, which rise with the increase of CNT loading. It was also stated that Cherazi’s model turned out to be suitable for describing the CO2 transport through analyzed hybrid membranes. The enhanced parameters of obtained membranes could translate directly to their future potential use in gas separation. This type of solution in the form of selective membranes for CO2 separation, e.g., from flue gases from coal combustion, may find future applications in the power industry.

Keywords: Fe@MWCNT-OH; CO2 separation; inorganic-organic hybrid materials; mechanical properties; magnetic properties; thermal parameters