Membrane technology for efficient diesel-water separation

M. Koudri*, O. Schmitz, T. Kuhmann, M. Ebrahimi, P. Czermak, University of Applied Sciences Mittelhessen; A. Schmidt, DECKMA Hamburg GmbH, Germany

The rapid development of diesel engines today allows a highly efficient use of this fuel. At the same time, fuel contamination by water is a major factor affecting performance of diesel engines. Especially with the introduction of the standard DIN EN 590 for diesel fuel in 2010, its interfacial tension was remarkably decreased by admixture of additives and biodiesel compared to conventional diesel. The change in the composition of the diesel fuel, resulting in much more stable water-in-diesel emulsions with much lower volumetric diameters of water droplets (≤ 10 microns), represents a major challenge.

One of the main problems is corrosion and cavitation damage emanating from the water contamination during the injection with a pressure up to 2.500 bar into modern diesel engines. The coalescence separators used today are no longer able to separate quantitatively the water from the fuel and lose after short time > 80% of the initial separation efficiency.

The goal of this study is the development of an efficient membrane-based process, which enables selective surface separating of water drops. This report discusses the application and characterization of various membrane materials and properties, membrane separation processes and operation modes for separation of water from Ultra Low Sulfur Diesel.

Session: M4 - Short Oral + Poster Presentations
Day: 12 October 2016
Time: 14:45 - 16:45 h

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