Breaking separation limits in membrane technology
| Autor: | Martin Maldovan, Juan Manuel Restrepo-Flórez |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Separation (aeronautics) Filtration and Separation 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Thermal diffusivity 01 natural sciences Biochemistry 0104 chemical sciences Membrane technology law.invention Chemical species Membrane Chemical physics law General Materials Science Physical and Theoretical Chemistry Solubility 0210 nano-technology Distillation Order of magnitude |
| Zdroj: | Journal of Membrane Science. 566:301-306 |
| ISSN: | 0376-7388 |
| Popis: | Membrane separation processes are efficient and sustainable alternatives to energy intensive distillation operations. In gas separations, polymeric membranes dominate the landscape of industrial applications and many improvements in performance hinge on the ability to tailor the chemistry of polymeric materials. The basic goal in membrane separations is to control the solubility and diffusivity of the chemical compounds in order to tailor the relative magnitude of the fluxes of the chemical species across the membrane. In this paper, we introduce a fundamentally new separation device that uses an anisotropic polymeric membrane to guide molecular transport to specific spatial locations. Our proposed separation device enables to manipulate the flux direction of compounds, in addition to the flux magnitude, thus adding a new tool to separate chemical species. We report unprecedented selectivities for O2/N2 separation – up to two orders of magnitude larger than conventional membranes. |
| Databáze: | OpenAIRE |
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