Matrimid was utilized for the preparation of membranes with asymmetric
structures. A combination of well-known solvents for Matrimid which include 1-
methyl-2-Pyrrolidone (NMP), tetrahydrofuran (THF), dichloromethane,
tetrachloroethane as well as non-solvents n-butanol, xylene, and acetic acid were
used. Cast solutions were prepared at room temperature for different
combinations and compositions of polymer/solvent/non-solvent systems. PEG
and Octa-(amino phenyl) POSS were introduced in some of the cast solutions.
The membranes obtained were characterized by permeation test for gas
permeabilities and selectivities, Scanning Electron Microscopy (SEM) and
Nuclear Magnetic Resonance (NMR) Spectroscopy. The gas permeation test
showed that the use of mixture of dichloromethane and tetrachloroethane as
solvents with xylene non-solvent and acetic acid as stabilizer gave membranes
with very high gas selectivity of 133 for CO2/N2 and 492 for CO2/CH4. Also, cast
solutions containing PEG resulted in membranes with slightly enhanced
selectivities from 30 to 42 for CO2/N2. Permeation results for CO2, N2 and H2 and
the selectivities for gas pairs such as CO2/N2, CO2/CH4, are discussed in relation
to the effect of pressure on the membrane permeance, they are also compared
with existing results.
| Identifer | oai:union.ndltd.org:kaust.edu.sa/oai:repository.kaust.edu.sa:10754/235352 |
| Date | 07 1900 |
| Creators | Irerua, Olayinka |
| Contributors | Peinemann, Klaus-Viktor, Nunes, Suzana Pereira, Rothenberger, Alexander |
| Source Sets | King Abdullah University of Science and Technology |
| Language | English |
| Detected Language | English |
| Type | Thesis |
Page generated in 0.0019 seconds