Correlation between Polymer Packing and Gas Transport Properties for Co2/N2 Separation in Glassy Fluorinated Polyimide Membrane

Tan, P. C. and Jawad, Z. A. and Ooi, B. S. and Ahmad, A. L. and Low, S. C. (2016) Correlation between Polymer Packing and Gas Transport Properties for Co2/N2 Separation in Glassy Fluorinated Polyimide Membrane. Journal of Engineering Science and Technology, 11 (7). pp. 935-946. ISSN 1823-4690

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Abstract

Gas separation performance of a membrane highly hinges on its physical properties. In this study, the interplay between polymer packing of a membrane and its gas transport behaviours (permeability and selectivity) was investigated through a series of 6FDA-DAM:DABA (3:2) polyimide membranes with different polymer compactness. The chemical structure and the polymer packing of the resulting membrane were characterized using attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) and packing density measurement, respectively. CO2/N2 separation efficiency of the membrane was evaluated at 25oC with feed pressure up to 6 bar. N2 permeability was found to rely on the membrane’s packing density, which signified its greater dependence on molecular sieving. In contrast, sorption showed a more vital role in determining the CO2 permeability. In this work, the membrane with a final thickness of 97±2 μm had successfully surpassed the Robeson’s 2008 upper bound plot with a CO2 permeability of 83 Barrer and CO2/N2 selectivity of 97 at 3 bar permeation.

Item Type: Article
Subjects: T Technology > TP Chemical Technology > TP1-1185 Chemical technology
Divisions: Kampus Kejuruteraan (Engineering Campus) > Pusat Pengajian Kejuruteraan Kimia (School of Chemical Engineering) > Article
Depositing User: Mr Noorazilan Noordin
Date Deposited: 02 Oct 2017 06:20
Last Modified: 27 Nov 2017 11:21
URI: http://eprints.usm.my/id/eprint/36843

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