(717d) Low Sooting Tendencies and Structure-Property Relationships of Individual Polyoxymethylene Ethers As Alternative Diesel Fuels
AIChE Annual Meeting
Wednesday, November 10, 2021 - 3:30pm to 5:00pm
The sooting tendencies were characterized by Yield Sooting Index (YSI), which is based on the maximum soot concentration measured in coflow diffusion flames whose fuel is methane doped with a low concentration of each test compound. The figure shows the results in terms of YSI (~soot/mole) and YSI/LHV (~soot/energy). The sooting tendencies of all the POMEs are much lower than a certification diesel fuel (âCF dieselâ), which demonstrates that all the POMEs have soot emission benefits. The YSIs of the POMEs decrease with more oxymethylene units (e.g., from M1M to M5M) and increase with more carbon atoms in the end groups (e.g., from M1M to B1B). Reaction pathway analysis indicates that POMEs with more oxymethylene units dissociate to larger amounts of formaldehyde, which dilutes soot formation from the other products, while POMEs with longer end groups dissociate to larger amounts of ethylene, which increases soot production.