Abstract
The oxidation of dimethoxymethane (DMM) has been studied under a wide range of temperatures (373–1073 K), pressures (20–60 bar) and air excess ratios (λ = 0.7, 1 and 20), from both experimental and modeling points of view. Experimental results have been interpreted and analyzed in terms of a detailed gas-phase chemical kinetic mechanism for describing the DMM oxidation. The results show that the DMM oxidation regime for 20, 40 and 60 bar is very similar for both reducing and stoichiometric conditions. For oxidizing conditions, a plateau in the DMM, CO and CO2 concentration profiles as a function of the temperature can be observed. This zone seems to be associated with the peroxy intermediate, CH3OCH2O2, whose formation and consumption reactions appear to be important for the description of DMM conversion under high pressure and high oxygen concentration conditions.
Highlights
Diesel engines are used for transportation because of their high fuel efficiency. They highly contribute to nitrogen oxides (NOx) and particulate matter (PM) emissions, which are difficult to reduce simultaneously in conventional diesel engines (NOx formation is favored under fuel-lean conditions, whereas PM is formed when there is a lack of oxygen)
The experimental results have been interpreted in terms of the detailed kinetic mechanism previously described
Reactions involving methyl formate (MF) (CH3OCHO) and its radicals present a high sensitivity, as an important intermediate in the DMM oxidation under the conditions studied in the present work
Summary
Diesel engines are used for transportation because of their high fuel efficiency. they highly contribute to nitrogen oxides (NOx) and particulate matter (PM) emissions, which are difficult to reduce simultaneously in conventional diesel engines (NOx formation is favored under fuel-lean conditions, whereas PM is formed when there is a lack of oxygen). Under the conditions studied in this work, high pressures (20, 40 and 60 bar) and fuel lean conditions (λ=20), the reactions forming peroxy species (reactions 19 and 20) may have an important impact on the oxidation chemistry of DMM and, these reactions have been included in our final mechanism.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
