Hierarchical Auto-Ignition and Structure-Reactivity Trends of C2–C4 1-Alkenes Article Swipe
Wuchuan Sun
,
Yingjia Zhang
,
Yang Li
,
Zuohua Huang
·
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.3390/en14185797
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.3390/en14185797
Ignition delay times of small alkenes are a valuable constraint for the refinement of the core kinetic mechanism of hydrocarbons used in representing combustion properties of real fuels. Moreover, the chemical reactivity comparison of those small alkenes provides a reference in object-oriented fuel design and logical combustion utilization. In this study, the ignition delay times of C2–C4 alkenes (ethylene, propene and 1-butene) were measured behind reflected shock waves first, with a fixed oxygen concentration (XO2 = 6%) and equivalence ratio (φ = 1.0) at various pressures of 1.2, 4.0 and 16.0 atm, in order to facilitate the comparison. Three chemical-based-Arrhenius-type correlations covering a wide range of temperature, pressure, equivalence ratio, and dilution were proposed. The simplified reaction network for pyrolysis and oxidation of 1-alkenes was depicted relying on the reaction classes of alkenes. Nine generally accepted mechanisms were used to simulate the ignition delay times measured by this study as well as literature. All the kinetic models show reasonable structure-reactivity trends for all of the three alkenes, but only NUIGMech 1.1 is capable of representing quantificationally the chemical reactivity at all tested conditions. Generally, ethylene exhibits the highest reactivity while propene presents the lowest at high temperatures. Analyses of sensitivity and flux indicate that the main oxidation pathway of ethylene is chain-branching, which accelerates the accumulation of free radical pools, especially for the Ḣ atom, Ȯ atom and ȮH radical, which results in the highest reactivity of ethylene. For propene and 1-butene, due to the presence of the allylic site, consumption of allylic radicals becomes the decisive step of oxidation and allylic radicals are mostly consumed by the HȮ2 radical. However, there are no such efficient reaction pathways for the formation of HȮ2 radicals during the propene oxidation process, while reaction pathways for HȮ2 formation in 1-butene are efficient. Thus, 1-butene presents higher reactivity compared to propene.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3390/en14185797
- https://www.mdpi.com/1996-1073/14/18/5797/pdf?version=1631615793
- OA Status
- gold
- Cited By
- 3
- References
- 65
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W3199764010
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W3199764010Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3390/en14185797Digital Object Identifier
- Title
-
Hierarchical Auto-Ignition and Structure-Reactivity Trends of C2–C4 1-AlkenesWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2021Year of publication
- Publication date
-
2021-09-14Full publication date if available
- Authors
-
Wuchuan Sun, Yingjia Zhang, Yang Li, Zuohua HuangList of authors in order
- Landing page
-
https://doi.org/10.3390/en14185797Publisher landing page
- PDF URL
-
https://www.mdpi.com/1996-1073/14/18/5797/pdf?version=1631615793Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
- OA URL
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https://www.mdpi.com/1996-1073/14/18/5797/pdf?version=1631615793Direct OA link when available
- Concepts
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Propene, Reactivity (psychology), Chemistry, Combustion, Ethylene, Alkene, Ignition system, Arrhenius equation, Autoignition temperature, Thermodynamics, Reaction mechanism, Organic chemistry, Catalysis, Activation energy, Physics, Pathology, Alternative medicine, MedicineTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
3Total citation count in OpenAlex
- Citations by year (recent)
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2024: 1, 2023: 1, 2022: 1Per-year citation counts (last 5 years)
- References (count)
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65Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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