Ozone-assisted low temperature oxidation of methanol and ethanol
Ozone-assisted combustion is an advanced combustion technology that is considered a promising means for the active control of combustion. Ozone addition can enhance combustion processes and extend the experimental parameters to extreme conditions. In this work, ozone-assisted low temperature oxidati...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Applications in Energy and Combustion Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666352X22000280 |
| _version_ | 1811185522972819456 |
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| author | Bingzhi Liu Long Zhu Qingbo Zhu Hao Lou Qiang Xu Zhandong Wang |
| author_facet | Bingzhi Liu Long Zhu Qingbo Zhu Hao Lou Qiang Xu Zhandong Wang |
| author_sort | Bingzhi Liu |
| collection | DOAJ |
| description | Ozone-assisted combustion is an advanced combustion technology that is considered a promising means for the active control of combustion. Ozone addition can enhance combustion processes and extend the experimental parameters to extreme conditions. In this work, ozone-assisted low temperature oxidation of methanol and ethanol in a jet-stirred reactor (JSR) was carried out at atmospheric pressure, with a fuel initial mole fraction of 0.005, an equivalence ratio of 0.28, and in the temperature range of 330–800 K. Significant conversions of methanol and ethanol were observed in the low temperature region when ozone was added. Numerous intermediate species were analyzed and quantified by synchrotron vacuum ultraviolet photoionization mass spectrometry and gas chromatography, which are crucially important for unraveling the low temperature oxidation reaction network. The kinetic model of NUIGMech1.1 is tentatively updated to better explain the measured results, although the improvements of the C1–C2 core mechanisms are difficult. Ozone addition enhances the action of the reaction channel of related radicals. Model analysis shows that the kinetics of Ö/ȮH/HȮ2 atoms/radicals are crucial for the overall reaction progress, as well as the reaction of HȮ2 radicals with ozone, which mainly contributes to the formation of ȮH radicals during the initial reaction stage. Inconsistency between measurements and model predictions highlights the considerable uncertainty in the C1-C2 alcohols subchemistry at lower temperatures. The experimental results obtained in this work and model development will motivate further study of the low temperature oxidation chemistry of methanol and ethanol. |
| first_indexed | 2024-04-11T13:30:51Z |
| format | Article |
| id | doaj.art-3a730f7ee7264053b00dd818216defba |
| institution | Directory Open Access Journal |
| issn | 2666-352X |
| language | English |
| last_indexed | 2024-04-11T13:30:51Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Applications in Energy and Combustion Science |
| spelling | doaj.art-3a730f7ee7264053b00dd818216defba2022-12-22T04:21:49ZengElsevierApplications in Energy and Combustion Science2666-352X2022-12-0112100085Ozone-assisted low temperature oxidation of methanol and ethanolBingzhi Liu0Long Zhu1Qingbo Zhu2Hao Lou3Qiang Xu4Zhandong Wang5National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, PR ChinaNational Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, PR ChinaNational Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, PR ChinaNational Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, PR ChinaNational Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, PR ChinaNational Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, PR China; State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, PR China; Corresponding author.Ozone-assisted combustion is an advanced combustion technology that is considered a promising means for the active control of combustion. Ozone addition can enhance combustion processes and extend the experimental parameters to extreme conditions. In this work, ozone-assisted low temperature oxidation of methanol and ethanol in a jet-stirred reactor (JSR) was carried out at atmospheric pressure, with a fuel initial mole fraction of 0.005, an equivalence ratio of 0.28, and in the temperature range of 330–800 K. Significant conversions of methanol and ethanol were observed in the low temperature region when ozone was added. Numerous intermediate species were analyzed and quantified by synchrotron vacuum ultraviolet photoionization mass spectrometry and gas chromatography, which are crucially important for unraveling the low temperature oxidation reaction network. The kinetic model of NUIGMech1.1 is tentatively updated to better explain the measured results, although the improvements of the C1–C2 core mechanisms are difficult. Ozone addition enhances the action of the reaction channel of related radicals. Model analysis shows that the kinetics of Ö/ȮH/HȮ2 atoms/radicals are crucial for the overall reaction progress, as well as the reaction of HȮ2 radicals with ozone, which mainly contributes to the formation of ȮH radicals during the initial reaction stage. Inconsistency between measurements and model predictions highlights the considerable uncertainty in the C1-C2 alcohols subchemistry at lower temperatures. The experimental results obtained in this work and model development will motivate further study of the low temperature oxidation chemistry of methanol and ethanol.http://www.sciencedirect.com/science/article/pii/S2666352X22000280MethanolEthanolLow temperature oxidationOzone-assisted combustionAdvanced combustion technology |
| spellingShingle | Bingzhi Liu Long Zhu Qingbo Zhu Hao Lou Qiang Xu Zhandong Wang Ozone-assisted low temperature oxidation of methanol and ethanol Applications in Energy and Combustion Science Methanol Ethanol Low temperature oxidation Ozone-assisted combustion Advanced combustion technology |
| title | Ozone-assisted low temperature oxidation of methanol and ethanol |
| title_full | Ozone-assisted low temperature oxidation of methanol and ethanol |
| title_fullStr | Ozone-assisted low temperature oxidation of methanol and ethanol |
| title_full_unstemmed | Ozone-assisted low temperature oxidation of methanol and ethanol |
| title_short | Ozone-assisted low temperature oxidation of methanol and ethanol |
| title_sort | ozone assisted low temperature oxidation of methanol and ethanol |
| topic | Methanol Ethanol Low temperature oxidation Ozone-assisted combustion Advanced combustion technology |
| url | http://www.sciencedirect.com/science/article/pii/S2666352X22000280 |
| work_keys_str_mv | AT bingzhiliu ozoneassistedlowtemperatureoxidationofmethanolandethanol AT longzhu ozoneassistedlowtemperatureoxidationofmethanolandethanol AT qingbozhu ozoneassistedlowtemperatureoxidationofmethanolandethanol AT haolou ozoneassistedlowtemperatureoxidationofmethanolandethanol AT qiangxu ozoneassistedlowtemperatureoxidationofmethanolandethanol AT zhandongwang ozoneassistedlowtemperatureoxidationofmethanolandethanol |