Abstract
The separation of equimolar mixtures of i-butane and n-butane through poly(1-trimethylsilyl-1-propyne)/MFI composite membranes was studied. Membranes were characterized by XRD and SEM. Addition of 50 wt% MFI particles into a PTMSP matrix showed increased permeability and simultaneous improved selectivity in the temperature range 25-200 °C. The best improvement was seen at 150 °C for the composites, giving almost threefold increase in permeability and 56% higher n-butane/i-butane selectivity over the pure polymer. To our knowledge, this is the first successful demonstration of the incorporation of a molecular sieve into a polymer matrix for butane isomer separations. The composite membranes were also tested for separations of n-hexane/2,2-dimethylbutane and p-xylene/o-xylene.
| Original language | English |
|---|---|
| Pages (from-to) | 330-338 |
| Number of pages | 9 |
| Journal | Microporous and Mesoporous Materials |
| Volume | 110 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - 2008 Apr 15 |
| Externally published | Yes |
Keywords
- Hybrid materials
- Membranes
- Permeation properties
- Poly(1-trimethylsilyl-1-propyne)
- Zeolites
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials