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Incorporation of Inorganic Carbon Nanotubes Fillers into the CA Polymeric Matrix for Improvement in CO2/N2 Separation

Author(s): Z.A. Jawad, A.L. Ahmad, S.C. Low, S.H.S. Zein.

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Abstract:

Among all separation techniques, membrane technology has been shown to reduce CO2 emissions without any phase changes due to its rapid, energy efficient process. The membrane-based gas separation must consist of a defect-free, thin, dense skin layer that is supported by a porous sub-layer that allows an excellent permeation rate and selectivity. This study is aimed at developing a defect-free, thin-skinned layer of mixed matrix membrane (MMM) from cellulose acetate (CA) polymer and functionalized multi walled carbon nanotubes (MWCNTs) as inorganic filler. The influences of membrane casting thickness (150-300) µm and CA polymer concentration (7-17) wt.% on membrane morphologies were first investigated. The outcome of these dominant parameters were then used to synthesize the MMM. The results showed that the defect-free, thin, dense skin thickness of membrane could be achieved with a casting thickness of 250 µm and CA polymer concentration of 10 wt.%. By considering both dominant parameters, the synthesized MMM proved to have a thin selective layer, whereby it showed a high permeance and selectivity for CO2/N2 gas separation.

Keywords: Cellulose acetate membrane, characterization, gas separation, mixed matrix membrane, thin dense skin layer.

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Article Details

VOLUME: 11
ISSUE: 1
Year: 2015
Page: [69 - 79]
Pages: 11
DOI: 10.2174/1573413710666140922224633
Price: $58