Abstract
Novel inorganic–organic hybrid membranes Fe@MWCNT/PPO or Fe@MWCNT-OH/SPPO (with a new type of CNTs characterized by increased iron content 5.80 wt%) were synthesized for CO2 separation. The introduction of nanofillers into the polymer matrix has significantly improved the hybrid membrane’s gas transport (D, P, S, and αCO2/N2), magnetic, thermal, and mechanical parameters. It was found that magnetic casting has improved the alignment and dispersion of Fe@MWCNTs. At the same time, CNTs and polymer chemical modification enhanced interphase compatibility and the membrane’s CO2 separation efficiency. The thermo-oxidative stability and mechanical and magnetic parameters of composites were improved by increasing new CNTs loading. Cherazi’s model turned out to be suitable for describing the CO2 transport through analyzed hybrid membranes.
Highlights
Nowadays, the main problems with climate changes and global warming are caused due to a significant increase in greenhouse gases concentration in the atmosphere, mainly CO2 [1]
Such separated CO2 can be used in enhanced oil recovery (EOR) operations or to feed algae, phytoplankton, or bacteria that enable the production of food, nutritional supplements, feed for livestock, methane, and lipids, which can be converted into biofuel and even the algal plastic called polyethylene furandicarboxylate (PEF) [6]
The coercivity slightly increased or remained relatively unchanged in the stronger magnetic field, which could be caused by more homogeneous dispersion of CNT in a polymer matrix (Fe@MWCNTs are aligned according to the magnetic-field lines—Figure 4b)
Summary
The main problems with climate changes and global warming are caused due to a significant increase in greenhouse gases concentration in the atmosphere, mainly CO2 [1]. CO2 separation is significant in other applications, such as biogas production and natural gas sweetening [3,5,6,7,8]. Such separated CO2 can be used in enhanced oil recovery (EOR) operations or to feed algae, phytoplankton, or bacteria that enable the production of food, nutritional supplements, feed for livestock, methane, and lipids, which can be converted into biofuel and even the algal plastic called polyethylene furandicarboxylate (PEF) [6]. The development of the appropriate CO2 separation technologies is significant
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