Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Autoignition of cyclohexane at low-to-intermediate temperatures: Rapid compression machine experiments and improved comprehensive chemical kinetic model

Journal Article · · Combustion and Flame
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

References (58)

The Impact of Resonance Stabilization on the Intramolecular Hydrogen-Atom Shift Reactions of Hydrocarbon Radicals journal July 2015
A shock tube study of cyclopentane and cyclohexane ignition at elevated pressures journal October 2008
THERM: Thermodynamic property estimation for gas phase radicals and molecules journal September 1991
Instantaneous temperature measurement in a rapid-compression machine using laser Rayleigh scattering journal July 1995
Heavy Oil and Oil (Tar) Sands in North America: An Overview & Summary of Contributions journal November 2006
The production of benzene in the low-temperature oxidation of cyclohexane, cyclohexene, and cyclohexa-1,3-diene journal October 2001
A wide range kinetic modeling study of the pyrolysis and combustion of naphthenes journal February 2003
Rapid Compression Machines: Heat Transfer and Suppression of Corner Vortex journal August 1998
Detailed kinetic reaction mechanism for cyclohexane oxidation at pressure up to ten atmospheres journal January 2000
Shock tube measurements of high temperature rate constants for OH with cycloalkanes and methylcycloalkanes journal May 2009
A comparative study of the oxidation characteristics of cyclohexane, methylcyclohexane, and n-butylcyclohexane at high temperatures journal August 2011
Laminar flame speeds of cyclohexane and mono-alkylated cyclohexanes at elevated pressures journal April 2012
An experimental and modeling study of the low- and high-temperature oxidation of cyclohexane journal November 2013
Fundamentally-based kinetic model for propene pyrolysis journal December 2015
An updated experimental and kinetic modeling study of n-heptane oxidation journal October 2016
Theoretical kinetic studies for low temperature oxidation of two typical methylcyclohexyl radicals journal August 2017
Experimental and modeling studies of a biofuel surrogate compound: laminar burning velocities and jet-stirred reactor measurements of anisole journal March 2018
Pressure-dependent rate rules for intramolecular H-migration reactions of normal-alkyl cyclohexylperoxy radicals journal June 2019
A tangent linear approximation of the ignition delay time. I: Sensitivity to rate parameters journal August 2021
Ab initio kinetics on cyclohexylperoxy radical: The product of oxygen addition to cyclohexyl journal September 2020
A comparison study of cyclopentane and cyclohexane laminar flame speeds at elevated pressures and temperatures journal December 2018
Ignition delay study of moist hydrogen/oxidizer mixtures using a rapid compression machine journal April 2012
Recent progress in the development of diesel surrogate fuels journal June 2011
Using rapid compression machines for chemical kinetics studies journal October 2014
Ab initio evaluation of primary cyclo-hexane oxidation reaction rates journal January 2007
The autoignition of cyclopentane and cyclohexane in a shock tube journal January 2007
Benzene precursors and formation routes in a stoichiometric cyclohexane flame journal January 2007
An experimental and modeling study of the propagation of cyclohexane and mono-alkylated cyclohexane flames journal January 2011
A rapid compression machine study of the low temperature combustion of cyclohexane at elevated pressures journal January 2013
Faster solvers for large kinetic mechanisms using adaptive preconditioners journal January 2015
The oxidation of 2-butene: A high pressure ignition delay, kinetic modeling study and reactivity comparison with isobutene and 1-butene journal January 2017
Theoretical studies for reaction kinetics of cy-C6H11CH2 radical with O2 journal January 2017
Kinetic modeling study of surrogate components for gasoline, jet and diesel fuels: C7-C11 methylated aromatics journal January 2019
High-Pressure-Limit and Pressure-Dependent Rate Rules for Unimolecular Reactions Related to Hydroperoxy Alkyl Radicals in Normal Alkyl Cyclohexane Combustion. 1. Concerted HO2 Elimination Reaction Class and β-Scission Reaction Class journal September 2021
High-Pressure-Limit and Pressure-Dependent Rate Rules for Unimolecular Reactions Related to Hydroperoxy Alkyl Radicals in Normal-Alkyl Cyclohexane Combustion. 2. Cyclization Reaction Class journal September 2021
Product Identification in the Low-Temperature Oxidation of Cyclohexane Using a Jet-Stirred Reactor in Combination with SVUV-PEPICO Analysis and Theoretical Quantum Calculations journal August 2022
Extensive Theoretical Study of the Thermochemical Properties of Unsaturated Hydrocarbons and Allylic and Super-Allylic Radicals: The Development and Optimization of Group Additivity Values journal May 2018
Modeling of the Gas-Phase Oxidation of Cyclohexane journal July 2006
Comparative Study on Autoignition Characteristics of Methylcyclohexane and Cyclohexane journal March 2015
Detailed Chemical Kinetic Modeling of Cyclohexane Oxidation† journal May 2007
Reactivity–Structure-Based Rate Estimation Rules for Alkyl Radical H Atom Shift and Alkenyl Radical Cycloaddition Reactions journal January 2015
Accurate Benchmark Calculation of the Reaction Barrier Height for Hydrogen Abstraction by the Hydroperoxyl Radical from Methane. Implications for C n H 2 n +2 where n = 2 → 4 journal July 2008
Rate Constant Rules for the Automated Generation of Gas-Phase Reaction Mechanisms † journal January 2009
Theoretical Kinetic Study of the Reactions of Cycloalkylperoxy Radicals journal May 2009
Shock Tube and Theory Investigation of Cyclohexane and 1-Hexene Decomposition journal December 2009
Reactions of allylic radicals that impact molecular weight growth kinetics journal January 2015
Ab initio study of the influence of resonance stabilization on intramolecular ring closure reactions of hydrocarbon radicals journal January 2016
From electronic structure to model application for alkyl cyclohexane combustion chemistry: H-atom abstraction reactions by HȮ2 radical journal January 2023
Theory, measurements, and modeling of OH and HO2 formation in the reaction of cyclohexyl radicals with O2 journal January 2007
Formally direct pathways and low-temperature chain branching in hydrocarbon autoignition: the cyclohexyl + O2 reaction at high pressure journal January 2009
Critical Evaluation of Thermochemical Properties of C 1 –C 4 Species: Updated Group-Contributions to Estimate Thermochemical Properties journal March 2015
Chemical Kinetic Data Sheets for High‐Temperature Reactions. Part II journal November 1991
Exploring the low-temperature oxidation chemistry of cyclohexane in a jet-stirred reactor: An experimental and kinetic modeling study journal August 2018
A Rapid Compression Machine for Chemical Kinetics Studies at Elevated Pressures and Temperatures journal March 2007
Determination of and Fuel Structure Effects on Laminar Flame Speeds of C 1 to C 8 Hydrocarbons journal December 1998
Experimental and Kinetic Modeling Study of Cyclohexane Oxidation in a JSR at High Pressure journal September 1998
Low Temperature Oxidation of Cyclohexane: Uncertainty of Important Thermo-Chemical Properties journal December 2018
Theoretical Investigation of Rate Rules for H-Intermigration Reactions for Cyclic Alkylperoxy Radicals journal March 2023

Similar Records

An experimental and modeling study on autoignition of 2-phenylethanol and its blends with n-heptane
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