A comprehensive study on low-temperature oxidation chemistry of cyclohexane. II. Experimental and kinetic modeling investigation
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Type
ArticleAuthors
Zou, JiabiaoJin, Hanfeng
Liu, Dapeng

Zhang, Xiaoyuan

Su, Huaijiang
Yang, Jiuzhong
Farooq, Aamir

Li, Yuyang
KAUST Department
Chemical Kinetics & Laser Sensors LaboratoryClean Combustion Research Center
Mechanical Engineering
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2021-08-25Online Publication Date
2021-08-25Print Publication Date
2021-08Embargo End Date
2023-08-25Permanent link to this record
http://hdl.handle.net/10754/670885
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Show full item recordAbstract
Low-temperature oxidation of cyclohexane is investigated in two jet-stirred reactors (JSRs) at 1.04 bar and the equivalence ratio of 0.25. Reactive hydroperoxides and highly oxygenated molecules are detected using synchrotron vacuum ultraviolet photoionization mass spectrometry (SVUV-PIMS). The isomers of C6H10O (5-hexenal, cyclic ethers and cyclohexanone) are separated using gas chromatography combined with mass spectrometry (GC–MS). Detection of characteristic hydroperoxides verifies that the conventional two-stage oxygen addition channels and recently reported third oxygen addition channels both contribute to the low-temperature oxidation of cyclohexane. Conformation-dependent channels theoretically investigated in Part I of this work are found correlated with the experimental observations of ketohydroperoxide (KHP) and alkenyl-hydroperoxide (AnHP) intermediates. A new detailed kinetic model of cyclohexane oxidation is constructed with consideration of the investigated conformation-dependent pathways in Part I and the experimental revisit of OH attack reactions over 889–1301 K and 1.22–1.84 bar. The model is validated against the newly measured oxidation data in this work and previous experimental data over a variety of pressure, temperature and equivalence ratio conditions. Modeling analysis reveals that the KHP channel and AnHP channel dominate the chain-branching process under the investigated conditions. The third oxygen addition channels and bimolecular reaction channels are found to play less important roles under the investigated conditions, while these reactions can provide more significant contributions to OH formation under high-pressure and lean conditions.Citation
Zou, J., Jin, H., Liu, D., Zhang, X., Su, H., Yang, J., … Li, Y. (2021). A comprehensive study on low-temperature oxidation chemistry of cyclohexane. II. Experimental and kinetic modeling investigation. Combustion and Flame, 111550. doi:10.1016/j.combustflame.2021.111550Sponsors
This work was supported by the National Natural Science Foundation of China (91841301, U1832171) and National Key R&D Program of China (2017YFE0123100). The quantum chemistry calculation was performed on the High Performance Computing Cluster of Shanghai Jiao Tong University.Publisher
ElsevierJournal
Combustion and FlameAdditional Links
https://linkinghub.elsevier.com/retrieve/pii/S0010218021002935ae974a485f413a2113503eed53cd6c53
10.1016/j.combustflame.2021.111550