Abstract
The incorporation of aminolauric acid modified montmorillonite (f-MMT) in polyetherimide (PEI) has been implemented to develop hollow fibre nano-hybrid composite membranes (NHCMs) with improved gas separation characteristics. The aforementioned characteristics are caused by enhanced f-MMT spatial dispersion and interfacial interactions with PEI matrix. In this study, existing gas permeation models such as, Nielsen, Cussler, Yang–Cussler, Lape–Cussler and Bharadwaj were adopted to estimate the dispersion state of f-MMT and to predict the CO2 permeance in developed NHCMs. It was found out that the average aspect ratio estimated was 53, with 3 numbers of stacks per unit tactoid, which showed that the intercalation f-MMT morphology is the dominating dispersion state of filler in PEI matrix. Moreover, it was observed that Bharadwaj model showed the least average absolute relative error (%AARE) values till 3 wt. % f-MMT loading in the range of ±10 for a pressure range of 2 to 10 bar. Hence, Bharadwaj was the best fit model for the experimental data compared to other models, as it considers the platelets orientation.
Highlights
Today, among world community, the concerns over global warming have increased due to its impact on climate and weather change
Yang–Cussler, Lape–Cussler, and Bharadwaj geometry of phenomenological the dispersed filler.models, Due toNielsen, this assumption, Bharadwaj model is the best suited to PEImodels opted in nano-hybrid composite membranes (NHCMs) order to validate thefeed experimental
The average aspect ratio was found to be 53, with 3 numbers of stacks per tactoid, which showed that the intercalation morphology is the dominating dispersion state of f -MMT
Summary
Among world community, the concerns over global warming have increased due to its impact on climate and weather change. The permeation of gas molecules across membranes is dependent on the membrane morphology which is either porous or non-porous in nature. The gas molecules permeation through non-porous clay particles is governed by solution-diffusion mechanism. The gas molecules permeation through polymer phase takes place in four steps; the sorption of penetrant gas molecules at the membrane surface, gas dissolution inside membrane, diffusion through membrane, and desorption from the other surface [18]. The gas molecules mobility across polymer phase depends on both thermodynamic and kinetic properties of penetrant gas [19]. The gas permeation in polymer matrix depends on both diffusion (D)
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