Potential of long-chain oxymethylene ether and oxymethylene ether-diesel blends for ultra-low emission engines

Ahmad Omari, Benedikt Heuser, Stefan Pischinger and Christoph Rüdinger

Applied Energy, 2019, vol. 239, issue C, 1242-1249

Abstract: Oxymethylene ether (OMEn) has recently drawn high attention due to its high pollutant emission reduction potential and the sustainable synthesis pathways involving carbon capture and renewable hydrogen. In this work, five blends of OMEn in diesel fuel in addition to pure OME3-5 and diesel fuel as reference were investigated in a single cylinder engine. Each OMEn-Diesel blend was prepared with a different chain length, ranging from OME1 to OME5. The blending ratio of OMEn in fossil diesel fuel was set to 35 vol%, corresponding to a ∼23.5% diesel fuel substitution on a heating value basis. We find that OMEn contributes to improved oxidation conditions, resulting in a more complete combustion compared to conventional diesel fuel operation. This is reflected by reduced emissions of unburned hydrocarbons and carbon monoxide (up to 90%), higher burned mass fractions after the main combustion phase, higher indicated efficiencies (up to +3%) and lower exhaust gas temperatures (up to −70 °C). Furthermore, while pure OMEn burns soot-free, a significant soot reduction was measured for the OMEn-Diesel blends.

Keywords: Oxymethylene ether; Oxygenate; Diesel fuel blend; E-fuels; Alternative fuels; Soot (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (8)

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DOI: 10.1016/j.apenergy.2019.02.035

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