Data for publication "Impact of sub-ambient temperature on aging rate and gas separation properties of polymers of intrinsic microporosity".

Aging in Polymers of Intrinsic Microporosity has slowed down exploitation as the decay in performance over time due to densification makes them not suitable for industrial application. This work aimed to study the impact of operation and storage temperature on the gas separation properties and aging rates of PIM-1 self-standing films. The permeability, diffusivity and solubility of the tested membranes were monitored through permeation tests for pure carbon dioxide and nitrogen at a maximum upstream pressure of 1.3 bar for temperatures ranging from -20 °C to 25 °C. This study showed significant benefits in the operation of glassy polymeric membranes at low temperatures, resulting in a favourable trade-off in separation performance and a reduction of aging rate by three orders of magnitude. This brings new opportunities for the industrial application of PIMs in innovative carbon capture processes. This file presents the dataset obtained from the permeation measurement of polymeric membranes used for the separation of carbon dioxide and nitrogen at different age and temperature. From the measurement of a pure gas pressure build-up in a known volume downstream of a membrane, its separation properties (i.e., Permeability, Diffusivity and Solubility) can be obtained. The subsequent results obtained from this data are detailed in the corresponding publication listed in the metadata.