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Experimental Investigation of the Gas/Liquid Phase Separation Using a Membrane-Based Micro Contactor

Dyrda, Kay Marcel; Wilke, Vincent; Haas-Santo, Katja; Dittmeyer, Roland

Abstract:
The gas/liquid phase separation of CO2 from a water-methanol solution at the anode side of a µDirect-Methanol-Fuel-Cell (µDMFC) plays a key role in the overall performance of fuel cells. This point is of particular importance if the µDMFC is based on a “Lab-on-a-Chip” design with transient working behaviour, as well as with a recycling and a recovery system for unused fuel. By integrating a membrane-based micro contactor downstream into the µDMFC, the efficient removal of CO2 from a water-methanol solution is possible. In this work, a systematic study of the separation process regarding gas permeability with and without two-phase flow is presented. By considering the µDMFC working behaviour, an improvement of the overall separation performance is pursued. In general, the gas/liquid phase separation is achieved by (1) using a combination of the pressure gradient as a driving force, and (2) capillary forces in the pores of the membrane acting as a transport barrier depending on the nature of it (hydrophilic/hydrophobic). Additionally, the separation efficiency, pressure gradient, orientation, liquid loss, and active membrane area for ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000087481
Veröffentlicht am 10.05.2019
Originalveröffentlichung
DOI: 10.3390/chemengineering2040055
Coverbild
Zugehörige Institution(en) am KIT Institut für Mikroverfahrenstechnik (IMVT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2305-7084
KITopen-ID: 1000087481
HGF-Programm 34.12.01 (POF III, LK 01)
Erschienen in ChemEngineering
Band 2
Heft 4
Seiten Article: 55
Schlagworte gas/liquid separation; micro direct methanol fuel cell (µDMFC); porous membranes; micro channel; two-phase flow; micro contactor; separator
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