Switching of gas transport through metal-organic framework membranes by electric fields
Einleitung / AbstractAls Anwendungsgebiete für die Erfindung werden gesehen: Sensorik, Speichern und Freisetzen von Gasen, Biomedizintechnik, Air Conditioning, CO2 Capture and Storage, Paraffin/Olefin Trennung, Triggered Release
Abb. 1: Membrane is used as capacitor, when applying an electric field the MOF lattice is stiffened, thereby the material is altered.
Processes for the production of MOF membranes as supported thin layers are known.
The application of electric fields in membrane separation is described in US 6043066: biological cells with an electrical charge are separated by a membrane under the influence of an electric field.
There are examples to control and switch the transport of charged molecules through membranes by means of electric fields.
ProblemstellungA disadvantage of the separation performance of the metal-organic framework material membranes mentioned above is that they show flexibility and gas separation performance is lowered by that. Furthermore, the MOF membranes are called “molecular sieves” but they show no clear molecular sieving properties.
LösungIt is an object of the present invention to provide a technique for the control of gas transport through the membrane which makes it possible to fine-tune gas flux and gas composition which go through the membrane. This goal is achieved by using electric fields, sharpen molecular sieving and stiffen the network.
AnwendungsbereicheChemical Synthesis and Purification, Industrial Membrane Separation Processes, Triggered Release of Substances
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