Fabrication and characterization of brominated matrimid® 5218 membranes for CO2/CH4 separation: application of response surface methodology (RSM)
| Autor: | Mohammadreza Rahmani, Farid Talebnia, Abbass Kazemi, Pouria Abbasszadeh Gamali |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Fabrication Polymers and Plastics General Chemical Engineering Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Characterization (materials science) Membrane Chemical engineering Permeability (electromagnetism) Response surface methodology Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | e-Polymers. 16:481-492 |
| ISSN: | 1618-7229 2197-4586 |
| Popis: | In the present study, special effort was focused on increasing permeability of matrimid membranes. For this objective, a bromination reaction was carried out. The reaction of bromine with polymer was investigated using Fourier transform infrared (FTIR) spectroscopy analysis. A combination of pristine and brominated matrimid was used to prepare modified membranes due to the fact that brominated matrimid membranes were too delicate. Employing a gas separation membrane unit, the permeability of pristine and modified membranes for pure gases (CO2 and CH4) was studied. Modified membranes were much more permeable and less selective than pristine membranes. In fact, the increase in permeability of modified membranes can be attributed to the rise in the fractional free volume of modified membranes. Thermal properties of modified and unmodified membranes were also studied by thermal gravimetric and differential scanning calorimetry analysis. As a result, thermal resistance of modified membranes decreased in a limited temperature range. Modified membranes indicated smaller values of tensile strength than pristine membranes which were assessed using tensile strength analysis. The parameters which can affect the pure gases permeation through membranes such as, bromine concentration in modified membranes and operating pressure were considered as variables and the experimental design was carried out. |
| Databáze: | OpenAIRE |
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