Development of a microsieve based micro contactor for gas/liquid phase separation
| Autor: | Roland Dittmeyer, Kay Marcel Dyrda, Fabian Grinschek, Georg Rabsch, Katja Haas-Santo |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Analytical chemistry Filtration and Separation 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Cathode Analytical Chemistry Separation process Volumetric flow rate Anode Membrane technology law.invention 020401 chemical engineering Coating Chemical engineering law visual_art visual_art.visual_art_medium engineering Ceramic 0204 chemical engineering 0210 nano-technology Contactor |
| Zdroj: | Separation and Purification Technology. 220:238-249 |
| ISSN: | 1383-5866 |
| DOI: | 10.1016/j.seppur.2019.03.016 |
| Popis: | The overall performance of a “Lab-on-a-Chip” (LOC) design-based µDirect-Methanol- Fuel-Cell (µDMFC) are strongly dependent on the gas/liquid phase separation at the anode and cathode side, especially if the µDMFC is operated transiently with a recovery system for unused fuel. The use of membrane technology enables the separation of the two-phase flow into liquid and gas in a compact and flat device. In general, this is achievable by using a polymeric membrane based micro contactor installed downstream of the µDMFC. However, polymeric membranes are not methanol resistant in long-term use and have a high transport resistance. In contrast, metallic or ceramic microsieves have a high thermal and chemical stability in methanol as well as a low transport resistance due to their small uniform pore diameters and length. Thus higher separation performance, tailored selectivity and low system energy consumption are possible. In this work, a metallic microsieve based micro contactor for the position-independent gas/liquid phase separation is developed. As a separation layer a nickel microsieve was used with a total thickness of 10 µm. Furthermore, an investigation of the coating process of the microsieves using a-C:H:Si:O, SiO2 and Perfluorodecyltrichlorosilane (PFDTS) is carried out. Additionally, the separation efficiency for different volume flow rates up to 100 nmL/min CO2 are investigated in a new flexible test module to obtain a better insight into the separation process. |
| Databáze: | OpenAIRE |
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