Neat polyoxymethylene dimethyl ether in a diesel engine; part 1: Detailed combustion analysis

Barro, Christophe; Parravicini, Matteo; Boulouchos, Konstantinos

doi:10.1016/j.fuel.2019.115892

Cited by 41 publications

(15 citation statements)

References 19 publications

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“…Therefore, the engine components, such as the piston geometry and cylinder head, were optimized for operation with conventional fossil diesel. In order to avoid long and inefficient combustion durations due to the lower-level heating value, 38 the solenoid injectors for OME operation had higher nozzle flow rates. Besides the effect of decreasing efficiency during longer combustion durations, interactions of the fuel jet with the lubricant oil film are undesirable.…”

Section: Methodsmentioning

confidence: 99%

Particle emissions of a heavy-duty engine fueled with polyoxymethylene dimethyl ethers (OME)

Gelner

Rothe²,

Kykal³

et al. 2022

Environ. Sci.: Atmos.

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Section: Methodsmentioning

confidence: 99%

Particle emissions of a heavy-duty engine fueled with polyoxymethylene dimethyl ethers (OME)

Gelner

Rothe²,

Kykal³

et al. 2022

Environ. Sci.: Atmos.

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“…In general, OME produces lower amounts of soot than diesel. Nevertheless, the number of soot particles in a size range mainly below 20 nm is very high compared to the corresponding reference diesel case in agglomeration mode [138]. The transmission electron microscopy (TEM) investigations by Barro et al using an energy-dispersive X-ray system revealed that these soot particles contained a few nm-size metal inclusions.…”

Section: Emission Behaviormentioning

confidence: 94%

“…A slight trend for higher NOx emissions can also be inferred. Barro et al [138] reported on an exhaust gas emission analysis of a four-stroke diesel research engine for HDV operated with a mixture of 80% OME3 and 20% OME4. They observed different effects for neat OME fuel compared to the DIN EN (German Institute for Standardization, European Standard) 590 reference diesel fuel.…”

Section: Emission Behaviormentioning

confidence: 99%

Future Power Train Solutions for Long-Haul Trucks

et al. 2021

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Achieving the CO2 reduction targets for 2050 requires extensive measures being undertaken in all sectors. In contrast to energy generation, the transport sector has not yet been able to achieve a substantive reduction in CO2 emissions. Measures for the ever more pressing reduction in CO2 emissions from transportation include the increased use of electric vehicles powered by batteries or fuel cells. The use of fuel cells requires the production of hydrogen and the establishment of a corresponding hydrogen production system and associated infrastructure. Synthetic fuels made using carbon dioxide and sustainably-produced hydrogen can be used in the existing infrastructure and will reach the extant vehicle fleet in the medium term. All three options require a major expansion of the generation capacities for renewable electricity. Moreover, various options for road freight transport with light duty vehicles (LDVs) and heavy duty vehicles (HDVs) are analyzed and compared. In addition to efficiency throughout the entire value chain, well-to-wheel efficiency and also other aspects play an important role in this comparison. These include: (a) the possibility of large-scale energy storage in the sense of so-called ‘sector coupling’, which is offered only by hydrogen and synthetic energy sources; (b) the use of the existing fueling station infrastructure and the applicability of the new technology on the existing fleet; (c) fulfilling the power and range requirements of the long-distance road transport.

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“…This reduces the lower heating value (LHV) of The Cetane number of OME exceeds the requirements of the EN 590 standard, which is noticeable from an excellent ignitability, proven in previous studies. 12,33 The boiling range is similar to diesel, but with an initial boiling start and end at lower temperatures. The flash point of the OME mixture surpasses the value of EN 590.…”

Section: Tested Fuelsmentioning

confidence: 99%

Ultra-low emissions of a heavy-duty engine powered with oxymethylene ethers (OME) under stationary and transient driving conditions

Gelner

Beck²,

Pastoetter³

et al. 2021

International Journal of Engine Research

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Polyoxymethylene dimethyl ethers (OME) are promising candidates as substitutes for fossil diesel fuel. A regenerative electricity-based production, using captured airborne carbon dioxide (CO2) and hydrogen (H2) from water electrolysis as reactants, provides a valuable contribution to the energy transition in mobile applications. Besides the possibility of carbon-neutral production, OME offer the advantage of a sootless combustion, which resolves the trade-off between soot and nitrogen oxides (NOx) emissions, and supports the efforts of air pollution control. While the emission behaviour of OME-powered diesel engines in raw exhaust has been studied extensively, interactions between this exhaust and components of the after-treatment system are mainly unknown. This study contains investigations conducted using a urea dosing variation (alpha titration) on a heavy-duty engine in combination with a system for selective catalytic reduction (SCR). These investigations showed a lower NOx reduction efficiency in OME operation in partial load operation compared with the one in fossil diesel operation. This can be attributed, among other reasons, to lower exhaust temperatures in OME operation. However, the high tolerance of OME to exhaust gas recirculation (EGR) compensates for this disadvantage because of the reduction of the raw NOx emission level. The difference in SCR efficiency disappeared at a high load operation point. Additionally, the alpha titration revealed, that urea dosing decreases formaldehyde emission in the SCR system. A pre-conditioned WHSC and WHTC cycle demonstrated the potential of an OME engine with after-treatment in the form of a twin-dosing SCR system for ultra-low emissions. For the specific evaluation of the emissions during these test cycles, this study contains the detailed calculation of the required factors – so-called ‘ u-values’– for OME exhaust according to the technical standard UN/ECE R49.

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Neat polyoxymethylene dimethyl ether in a diesel engine; part 1: Detailed combustion analysis

Cited by 41 publications

References 19 publications

Particle emissions of a heavy-duty engine fueled with polyoxymethylene dimethyl ethers (OME)

Particle emissions of a heavy-duty engine fueled with polyoxymethylene dimethyl ethers (OME)

Future Power Train Solutions for Long-Haul Trucks

Ultra-low emissions of a heavy-duty engine powered with oxymethylene ethers (OME) under stationary and transient driving conditions

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