Abstract
This paper presents two strategies applied in our study, one involved blending CO2-phillic materials such as PEG and PEG-PDMS copolymer with commodity polymer Matrimid® to improve separation performance, another involved development of composite hollow fibre membranes of high CO2 permeance.Blending of PEG and PEG-PDMS copolymer in Matrimid® resulted in hollow fibre membranes with improved gas separation performance. The modification of the membrane microscopic structure also led to improvements in plasticization resistance and tolerance of water content that are important for industrial applications.Composite hollow fibre membranes of high permeance of 550 GPU and selectivity of 45 were developed by using micro-porous PVDF substrate, with multiple coatings PTMSP gutter layers and Pebax®1074 selective layers. Initial tests with mixed gas and short term aging were encouraging while the tests for the tolerance of water and minor components and tests with real flue gas are ongoing.
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