This research study describes the gas separation performance of different sets of
(PEO-b-PSU-b-PEO/Pebax) composite membranes for CO2 separation from N2 and CH4.
Gas permeation properties of the membranes prepared were studied at ambient
temperature (21oC) and 8bar. The dependence of gas flux and selectivity on pressure was
explored for different pressures from 2.5 bar up to 19 bar also at ambient temperature.
Pebax/PAN composite membranes have a range of CO2 permeance of 4467±274 GPU,
365±64 GPU for CH4 and 152±17 GPU for N2 with CO2/N2 and CO2/CH4selectivities
ranges of 30 and 13 respectively. Improved CO2/N2 and CO2/CH4 selectivities coupled
with flux reduction were obtained from the introduction of PEO-b-PSU-b-PEO films on
Pebax/PAN composite membranes. The gas flux reduced to about one-tenth of
Pebax/PAN membrane’s while the selectivities obtained for all the PEO-b-PSU-b-
PEO/Pebax/PAN membrane range from 33 to 60 for CO2/N2 and 17 to 33 for CO2/CH4 as
the thickness of PEO-b-PSU-b-PEO top layer increases.
|Date of Award||Jul 2012|
- Physical Science and Engineering
|Supervisor||Klaus-Victor Georg Peinemann (Supervisor)|
- Polyethylene Oxide