Abstract
Global warming has been identified as a serious environmental issue. The most promising way to stop the greenhouse gas effect is to develop a high-performance membrane for CO2 separation. In this study, research was conducted to determine the effects of different polymer concentrations (2 wt%, 4 wt%, and 6 wt%) and casting thicknesses (150 µm, 250 µm, and 300 µm) on the membrane performance. The obtained results showed cellulose acetate butyrate (CAB) membrane with polymer concentration of 4 wt% and casting thickness of 250 μm had a CO2/N2 selectivity of 1.398 ± 0.03. Thus, the mixed matrix membrane (MMM) was developed with 4 wt% of CAB polymer and 0.1 wt% functionalized multi-walled carbon nanotubes. Hence, this study confirmed that MMMs result in a better performance than polymeric membranes where the CO2 permeance, N2 permeance and CO2/N2 selectivity of the MMM were 365.741 ± 0.667 GPU, 73.410 ± 0.741 GPU, and 4.980 ± 0.050, respectively.
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