A comprehensive review of pristine Pebax-1657 membranes for CO2 gas separations

The present review aims to underline the inherent gas separation potential of pristine Pebax-1657, without any chemical modification, nor addition of filler material, by referring to a number of selected outstanding literature results. These results underscore the adequacy of pristine Pebax-1657 membranes in achieving excellent CO2 gas separation performances, within or close to the target area of commercial applicability in terms of technoeconomic competitiveness when compared to alternative CO2 separation/capture technologies. These achievements are facilitated by the utilization and combination of cutting-edge membrane preparation techniques. Additionally, the current review provides detailed information regarding material and gas separation properties based on experimental data, which are handpicked from literature and statistically presented to highlight significant differences in reported values. Basic empirical correlations emerging from these data are formulated, in order to provide a guideline for future membrane design, along with clarifications on important claims and points that are often encountered in relevant literature.