Permeance of Condensable Gases in Rubbery Polymer Membranes at High Pressure.

ABSTRACT: The gas transport properties of thin film composite membranes (TFCMs) with selective layers of PolyActive™, polydimethylsiloxane (PDMS), and polyoctylmethylsiloxane (POMS) were investigated over a range of temperatures (10-34 °C; temperature increments of 2 °C) and pressures (1-65 bar abs; 38 pressure increments). The variation in the feed pressure of condensable gases CO₂ and C₂H₆ enabled the observation of peaks of permeance in dependence on the feed pressure and temperature. For PDMS and POMS, the permeance peak was reproduced at the same feed gas activity as when the feed temperature was changed. PolyActive™ TFCM showed a more complex behaviour, most probably due to a higher CO₂ affinity towards the poly(ethylene glycol) domains of this block

SUBMITTER: Schuldt K 

PROVIDER: S-EPMC10972516 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature