Membrane technologies for CO2 separation

Stability of blended polymeric materials for CO2 separation

“…The most promising materials for membranes to be used in post-combustion gas separation are polymers containing polyethers, namely poly(ethylene glycol) and poly(propylene glycol). [6,35] It was shown that such polymers can provide membranes with properties matching economic requirements of post-combustion separation. Realistic analysis of the separation process indicates that currently it is not possible to reach a CO 2 purity sufficient for transportation and storage in a one stage separation.…”

“…[6] Combination of relatively high permeability and selectivity bring polymers containing ethylene glycol moiety to or above the present upper bound for CO 2 /N 2 in the Robeson plot. Fine tuning of polymer composition, adjustment of block length, or blending with low molecular poly(ethylene glycol)s allow significant increase of permeability without decrease in selectivity.…”

“…[5][6][7] It is acknowledged that the implementation of a carbon capture technology in energy production will require significant investments, operational expenses and thus increase of energy cost. [5] Gas separation will be the most expensive part of the CCS process.…”

SPEEK/Matrimid blend membranes for CO2 separation

“…Dimethylacetamide (DMA) was purchased from Acros (Belgium). CO 2 , CH 4 and N 2 were supplied by AirLiquide (Belgium).…”

“…To date, several methods have been proposed for the separation CO 2 from gas mixtures [3]. One promising method to lower the cost of CO 2 separation is development of CO 2 separation membranes [4]. The use of polymer membranes has contributed to the commercial success of this technique due to its low capital and energy cost, less space requirement and lower ecological footprint [5].…”