Combustion system optimization for the integration of e-fuels (Oxymethylene Ether) in compression ignition engines

Novella, Ricardo; Bracho, Gabriela; Gómez-Soriano, Josep; Fernandes, Cássio Spohr; Lucchini, Tommaso

doi:10.1016/j.fuel.2021.121580

Cited by 17 publications

(9 citation statements)

References 38 publications

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“…138 Regarding efficiency and NO x emission, the configuration of a traditional engine operating at full load with OME fuel was optimized using a numerical approach with n-heptane as a reference. 460 Such optimization attempts need reliable chemical reaction mechanisms that can be coupled into the used engine model, CFD code, and optimization routines (see also Section 2.2). The results showed a high sensitivity of the NO x emission on the EGR rate, 460 suggesting also a closer inspection of OME−NO x interactions, similar to respective analyses for methane discussed above (Section 3.2.1.2).…”

Section: Chemicalmentioning

confidence: 99%

“…460 Such optimization attempts need reliable chemical reaction mechanisms that can be coupled into the used engine model, CFD code, and optimization routines (see also Section 2.2). The results showed a high sensitivity of the NO x emission on the EGR rate, 460 suggesting also a closer inspection of OME−NO x interactions, similar to respective analyses for methane discussed above (Section 3.2.1.2).…”

Section: Chemicalmentioning

confidence: 99%

“…OME fuels have received increasing attention because of their suitability as clean and renewable diesel replacement fuels for light- and heavy-duty transport and in stationary power generation, in part using RCCI approaches and dual-fuel combinations. − They are discussed as drop-in fuels in a given vehicle and fuel infrastructure, with a possibility to adapt the chain length of the fuel molecule and its associated physicochemical characteristics to the respective process, ,, thus presenting advantages for a short- to midterm transition toward a sustainable transport sector . In addition to GHG savings, OME combustion can be performed with very low pollutant emissions, regarding both, NO x and soot. , Because of the absence of carbon–carbon bonds in the fuel molecule, the sooting tendency is greatly reduced, circumventing the usual soot–NO x trade-off in diesel combustion and allowing for measures such as high EGR rates to reduce NO x . , Dedicated studies have been performed to characterize the soot formation of OME 3 and of OME-diesel blends, , also in comparison with Fischer–Tropsch (FT) diesel, in part relying on optical inspection of the combustion process. − For example, high-speed OH* chemiluminescence and planar laser-induced incandescence (see also Section ) have been combined to analyze injection, spray formation, ignition, soot volume fraction, and spatial distribution of soot in a constant-volume vessel for a number of blends of OME 3–7 and diesel fuel .…”

Section: Fuels For a Carbon-reduced Perspectivementioning

confidence: 99%

“…Regarding efficiency and NO x emission, the configuration of a traditional engine operating at full load with OME fuel was optimized using a numerical approach with n -heptane as a reference . Such optimization attempts need reliable chemical reaction mechanisms that can be coupled into the used engine model, CFD code, and optimization routines (see also Section ).…”

Section: Fuels For a Carbon-reduced Perspectivementioning

confidence: 99%

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Combustion, Chemistry, and Carbon Neutrality

Kohse‐Höinghaus

2023

Chem. Rev.

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Combustion is a reactive oxidation process that releases energy bound in chemical compounds used as fuels�energy that is needed for power generation, transportation, heating, and industrial purposes. Because of greenhouse gas and local pollutant emissions associated with fossil fuels, combustion science and applications are challenged to abandon conventional pathways and to adapt toward the demand of future carbon neutrality. For the design of efficient, low-emission processes, understanding the details of the relevant chemical transformations is essential. Comprehensive knowledge gained from decades of fossil-fuel combustion research includes general principles for establishing and validating reaction mechanisms and process models, relying on both theory and experiments with a suite of analytic monitoring and sensing techniques. Such knowledge can be advantageously applied and extended to configure, analyze, and control new systems using different, nonfossil, potentially zero-carbon fuels. Understanding the impact of combustion and its links with chemistry needs some background. The introduction therefore combines information on exemplary cultural and technological achievements using combustion and on nature and effects of combustion emissions. Subsequently, the methodology of combustion chemistry research is described. A major part is devoted to fuels, followed by a discussion of selected combustion applications, illustrating the chemical information needed for the future.

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Section: Chemicalmentioning

confidence: 99%

Section: Chemicalmentioning

confidence: 99%

Section: Fuels For a Carbon-reduced Perspectivementioning

confidence: 99%

Section: Fuels For a Carbon-reduced Perspectivementioning

confidence: 99%

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Combustion, Chemistry, and Carbon Neutrality

Kohse‐Höinghaus

2023

Chem. Rev.

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“…Seeing as OMEx implementation offers many advantages, research has been conducted to optimize the combustion system for the compression ignition engine. This included piston geometry, number of spray nozzles, spray angle, swirl number, injection pressure, EGR rate and pressure at the intake valve closing, thus adapting the geometry of the combustion chamber for OMEx (Novella et al 2021). Although OMEx appears in different shapes depending on the molecule chain length, only certain OMEx fuels have the desired properties as fuel for ICE applications.…”

Section: Introductionmentioning

confidence: 99%

Numerical Assessment of Polyoxymethylene Dimethyl Ether (OME3) Injection Timing in Compression Ignition Engine

Markovic

Jurić

Šošić

et al. 2023

Preprint

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This research encompasses the numerical analysis of trioxymethylene dimethyl ether (OME-3) e-fuel on an industrial compression ignition engine, as a viable replacement for diesel fuel. The performed simulations examined single injection and multi injection operating conditions of OME-3, varying injection rates and timing. The combustion process is modelled employing two approaches: three-dimensional Extended Coherent Flame Model (ECFM-3Z) and General Gas Phase Reactions (GGPR) with the reduced chemical kinetic mechanism. ECFM-3Z gives a faster convergence, where pretabulated autoignition and laminar flame speed databases are integrated into the model to decrease computational time. GGPR approach is validated on the experimental values for mean pressure, temperature, and rate of released heat in the same engine with diesel fuel and then again on an OME-3. Both approaches confirmed that a higher amount of OME-3 and a longer injection time is needed to achieve equivalent output power as diesel fuel since OME-3 has a lower net calorific value. It is established that multi injection case with an adapted injection timing is the optimal choice for OME-3 combustion since it achieves a 15% higher mean pressure peak compared to the diesel case. Nitrogen oxides emissions for OME-3 are also compared to the diesel case for both combustion modelling approaches.

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