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Carbon dioxide separation using α ‐alumina ceramic tube supported cellulose triacetate‐tributyl phosphate composite membrane
Author(s) -
Shankar Kunalan,
Kandasamy Palanivelu
Publication year - 2019
Publication title -
greenhouse gases: science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 32
ISSN - 2152-3878
DOI - 10.1002/ghg.1845
Subject(s) - cellulose triacetate , permeance , thermogravimetric analysis , differential scanning calorimetry , gas separation , fourier transform infrared spectroscopy , materials science , chemical engineering , carbon dioxide , membrane , polymer , selectivity , composite number , nuclear chemistry , chemistry , composite material , organic chemistry , catalysis , biochemistry , physics , engineering , thermodynamics
Carbon dioxide emissions to the atmosphere lead to global warming and unpredictable climate change via the greenhouse effect. Carbon dioxide from industrial sources can be captured by the membrane separation technique to mitigate the greenhouse effect. In this research, a polymer solution was prepared by blending a cellulose triacetate (CTA) polymer with a tri‐ n ‐butyl phosphate (TBP) additive. The polymer solution was coated on an alumina ( α ‐Al 2 O 3 ) tube, which acted as a support material, to prepare a composite membrane for the CO 2 separation. The composite membrane that was prepared was characterized by Fourier‐transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermo‐gravimetric analysis (TGA), and differential scanning calorimetry (DSC) analyses. The CO 2 permeance and the selectivity for the prepared composite membrane were evaluated using a constant pressure‐variable volume method. The influence of the concentration of CTA and TBP, polymer solution preparation time, number of sequential dip coating, and the feed gas pressure on the CO 2 , N 2 , and CH 4 gas separation performances was examined. The highest CO 2 permeance of 129 GPU and the selectivity of 19.9 versus N 2 and 10.6 against CH 4 were obtained for the pure gases, and a CO 2 permeance of 116 GPU and selectivity of 17.1 against N 2 were obtained for a mixture of gases (15% CO 2 /85% N 2 ). © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.