Abstract
Propanol and butanol isomers have received significant research attention as promising fuel additives or neat biofuels. The ignition and combustion behavior of pure C3-C4 linear and iso-alcohols, and their blends with gasoline at engine-relevant conditions were investigated using a kinetic model with improved thermochemistry and reaction kinetics developed based on recent theoretical calculations of H-atom abstraction and peroxy radical reaction rates. Variations in reactivity over a wide range of temperatures and other operating conditions were well predicted by the current model. Recent ignition delay time measurements from a rapid compression machine of neat iso-propanol and iso-butanol and blends with a research grade gasoline at elevated pressure (20–40 bar) and intermediate temperatures (780 K–950 K) were used to demonstrate the accuracy of the current kinetic model at conditions relevant to boosted spark-ignition engines. The effects of alcohol blending with gasoline on the autoignition behavior are discussed. The current model captured the suppression of reactivity in the low-temperature and negative-temperature-coefficient region when either isopropanol and isobutanol are added to a research grade gasoline. Sensitivity and reaction flux analysis were performed to provide insights into the relevant fuel chemistry of the C3-C4 alcohols.
Original language | English |
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Pages (from-to) | 415-423 |
Number of pages | 9 |
Journal | Proceedings of the Combustion Institute |
Volume | 38 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2021 |
Externally published | Yes |
Event | 38th International Symposium on Combustion, 2021 - Adelaide, Australia Duration: 24 Jan 2021 → 29 Jan 2021 |
Keywords
- Butanol
- Chemical kinetics
- Fuel blend combustion
- Ignition delay time
- Propanol
ASJC Scopus subject areas
- General Chemical Engineering
- Mechanical Engineering
- Physical and Theoretical Chemistry