Combustion of n-C3-C6 Linear Alcohols: An Experimental and Kinetic Modeling Study. Part II: Speciation Measurements
M Pelucchi1, S Namysl2, E Ranzi1
1CRECK Modeling Lab, Department of Chemistry Materials and Chemical Engineering, Politecnico di Milano, 20133 Milano, Italy.
Energy & Fuels : an American Chemical Society Journal
|November 30, 2020
Summary
This study details new experimental combustion data for n-propanol, n-butanol, n-pentanol, and n-hexanol. The findings validate and refine a kinetic model for alcohol oxidation and pyrolysis.
Area of Science:
- Chemical Engineering
- Combustion Science
- Reaction Kinetics
Background:
- Linear alcohols (n-C3-C6) are important fuel components.
- Accurate kinetic models are crucial for understanding and predicting alcohol combustion.
- Existing models require validation with new experimental data.
Purpose of the Study:
- To present new experimental data for the combustion of n-propanol, n-butanol, n-pentanol, and n-hexanol.
- To validate and improve the CRECK kinetic model for alcohol pyrolysis and oxidation.
- To identify key reaction pathways in alcohol combustion.
Main Methods:
- Speciation measurements in a jet-stirred reactor (JSR) at various temperatures, pressures, and equivalence ratios.
- Ignition delay time measurements in a rapid compression machine (RCM).
- Kinetic modeling using updated subsets from the CRECK model, including rate of production and sensitivity analyses.
Main Results:
- New experimental data for speciation and ignition delay times of n-C3-C6 alcohols were obtained.
- The CRECK kinetic model was systematically updated and validated against the new data and literature.
- Kinetic analyses identified governing reaction pathways and areas for model improvement.
Conclusions:
- The study provides a comprehensive dataset for n-C3-C6 alcohol combustion.
- The validated CRECK model accurately describes alcohol pyrolysis and oxidation.
- Further refinements to the kinetic mechanism are suggested based on detailed analysis.
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