Autoignition of cyclohexane at low-to-intermediate temperatures: Rapid compression machine experiments and improved comprehensive chemical kinetic model
Journal Article
·
· Combustion and Flame
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- University of Connecticut, Storrs, CT (United States); Beihang University, Beijing (China)
- University of Connecticut, Storrs, CT (United States)
Cycloalkanes are an important class of hydrocarbons found in conventional and alternative transportation fuels. Being one of the simplest practical cycloalkanes, cyclohexane is often used as a surrogate in studies to understand the oxidation, ignition, and sooting characteristics of cycloalkanes more broadly. Although cyclohexane has been extensively studied, very limited datasets for cyclohexane oxidation at low-to-intermediate temperatures are available in the literature. Moreover, the literature autoignition data from rapid compression machines (RCMs) did not provide information on volume histories or experimental heat transfer characteristics which can significantly impact model predictions, thereby hindering the detailed validation of chemical kinetic models. It has also been observed that the cyclohexane kinetic models developed so far are not able to predict the literature data across a wide range of operating and mixture conditions. Hence, further studies are recommended to understand and improve model predictions for cyclohexane oxidation. In this study, RCM experiments were conducted using cyclohexane/air mixtures at varying compressed pressures (PC =15, 20, and 30 bar), equivalence ratios (ϕ=0.5, 1.0, and 2.0), and compressed temperatures (TC=670–960 K). The current RCM results of cyclohexane were found to complement well with the literature data, with the first-stage IDTs at high pressures and volume histories at all test conditions being first reported for better development and validation of chemical kinetic models. Additionally, a detailed chemical kinetic model for the cyclohexane oxidation has been developed and validated using both newly acquired experimental IDTs in this study and literature experimental studies (IDTs in RCMs and STs, species profiles in jet-stirred reactors, and laminar burning velocities). Unlike literature models, the proposed model was observed to provide an overall better prediction for experimental results over a wide range of conditions. Chemical kinetic analysis of the developed model was further conducted to identify the reaction pathways controlling the autoignition of cyclohexane.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 2318773
- Alternate ID(s):
- OSTI ID: 2217219
- Report Number(s):
- LLNL-JRNL-849234; 1074711
- Journal Information:
- Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: N/A Vol. 259; ISSN 0010-2180
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
An experimental and modeling study on autoignition of 2-phenylethanol and its blends with n-heptane
Autoignition study of iso-cetane/tetralin blends at low temperature
Autoignition of trans -decalin, a diesel surrogate compound: Rapid compression machine experiments and chemical kinetic modeling
Journal Article
·
Wed Dec 07 19:00:00 EST 2022
· Proceedings of the Combustion Institute
·
OSTI ID:2007593
Autoignition study of iso-cetane/tetralin blends at low temperature
Journal Article
·
Mon Mar 01 19:00:00 EST 2021
· Combustion and Flame
·
OSTI ID:1782529
Autoignition of trans -decalin, a diesel surrogate compound: Rapid compression machine experiments and chemical kinetic modeling
Journal Article
·
Mon May 14 20:00:00 EDT 2018
· Combustion and Flame
·
OSTI ID:1458649