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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Lyng Lejre, Kasper Hartvig
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2020Experimental Investigation and Mathematical Modeling of the Reaction between SO2(g) and CaCO3(s)-containing Micelles in Lube Oil for Large Two-Stroke Marine Diesel Enginescitations
- 2019Mixed Flow Reactor Experiments and Modeling of Sulfuric Acid Neutralization in Lube Oil for Large Two-Stroke Diesel Enginescitations
- 2019Mechanisms of sulfur dioxide and sulfuric acid neutralization in lube oil for marine diesel engines
- 2017Reaction of Sulfuric Acid in Lube Oil: Implications for Large Two-Stroke Diesel Enginescitations
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document
Reaction of Sulfuric Acid in Lube Oil: Implications for Large Two-Stroke Diesel Engines
Abstract
Slow-steaming operation and an increased pressure in the combustion chamber have contributed to increased sulfuric acid (H<sub>2</sub>SO<sub>4</sub>) condensation on the cylinder liners in large two-stroke marine diesel engines, thus causing increased corrosion wear. To cope with this, lube oils are formulated with overbased detergent additives present as CaCO<sub>3 </sub>reverse micelles to neutralize the condensing H<sub>2</sub>SO<sub>4</sub>. In this present work, a mixed flow reactor (MFR) setup aims to investigate the neutralization reaction by varying Ca/S molar ratio, stirrer speed, H<sub>2</sub>SO<sub>4</sub> inlet concentration, and residence time. Lube oil samples from the outlet of the MFR were analysed by use of Fourier Transform Infrared Spectroscopy (FTIR) and a titration method. The MFR results indicate that the CaCO<sub>3</sub>-H<sub>2</sub>SO<sub>4</sub> reaction is very fast in a real engine, if the cylinder liner is well-wetted, the oil-film is well-mixed, and contains excess of CaCO<sub>3</sub> compared to the condensed H<sub>2</sub>SO<sub>4</sub>. The observed corrosion wear in large two-stroke marine diesel engines could consequently be attributed to local molar excess of H<sub>2</sub>SO<sub>4</sub> compared to CaCO<sub>3</sub> reverse micelles on the cylinder liners.<br/>