Separation of binary mixtures of propylene and propane by facilitated transport through silver incorporated poly(ether-block-amide) membranes
The separation of propylene and propane is a challenging task in petroleum refineries due to the similar molecular sizes and physical properties of two gases. Composite Poly(etherblock- amide) (Pebax-1657) membranes incorporated with silver tetra fluoroborate (AgBF4) in concentrations of 0-50% of th...
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| Main Authors: | , , , , |
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| Format: | Article |
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Editions Technip
2015
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/55428/ http://dx.doi.org/10.2516/ogst/2013190 |
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| Summary: | The separation of propylene and propane is a challenging task in petroleum refineries due to the similar molecular sizes and physical properties of two gases. Composite Poly(etherblock- amide) (Pebax-1657) membranes incorporated with silver tetra fluoroborate (AgBF4) in concentrations of 0-50% of the polymer weight were prepared by solution casting and solvent evaporation technique. The membranes were characterized by Scanning Electron Microscopy (SEM), Fourier Transform InfraRed (FTIR) and wide-angle X-Ray Diffraction (XRD) to study surface and cross-sectional morphologies, effect of incorporation on intermolecular interactions and degree of crystallinity, respectively. Experimental data was measured with an indigenously built high-pressure gas separation manifold having an effective membrane area of 42 cm2. Permeability and selectivity of membranes were determined for three different binary mixtures of propylene-propane at pressures varying in the range 2-6 bar. Selectivity of C3H6/C3H8 enhanced from 2.92 to 17.22 and 2.11 to 20.38 for 50/50 and 66/34 C3H6+C3H8 feed mixtures, respectively, with increasing loading of AgBF4. Pebax membranes incorporated with AgBF4exhibit strong potential for the separation of C3H6/C3H8 mixtures in petroleum refineries. |
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