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Enhancing the CO 2 Separation Performance of Matrimid 5218 Membranes for CO 2 /CH 4 Binary Mixtures
Author(s) -
Castro-Muñoz Roberto,
Fíla Vlastimil,
Ahmad Mohd Zamidi
Publication year - 2019
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201800111
Subject(s) - differential scanning calorimetry , membrane , thermogravimetric analysis , peg ratio , permeation , materials science , chemical engineering , polyethylene glycol , fourier transform infrared spectroscopy , casting , gas separation , scanning electron microscope , polymer chemistry , chemistry , composite material , biochemistry , engineering , physics , finance , economics , thermodynamics
Abstract The effect of CO 2 ‐philic additive polyethylene glycol (PEG) 200 in Matrimid 5218 on the separation performance of prepared membranes was evaluated in a binary gas mixture. Matrimid/PEG 200 flat‐sheet blended membranes with low PEG concentrations were prepared by the dense film‐casting method. Pure Matrimid and blended membranes were characterized by FTIR spectroscopy, scanning electron microscopy, differential scanning calorimetry, thermogravimetric analysis, and permeation measurements. The addition of 4–5 % of PEG enhanced considerably the CO 2 permeability of the Matrimid matrix. The best formulation, Matrimid/PEG 200 (96/4), showed in comparison to pure Matrimid a more than threefold increase in CO 2 permeability and an increase in separation factor of about 40 %.