Kinetic study of reaction C2H5 + HO2 in a photolysis reactor with time-resolved Faraday rotation spectroscopy

Zhong, Hongtao; Yan, Chao; Teng, Chu C.; Guo, Ma; Wysocki, Gerard; Ju, Yiguang

doi:10.1016/j.proci.2020.07.095

Cited by 6 publications

(7 citation statements)

References 21 publications

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“…Probing sooting characteristics or particle formation in flames is possible using laser-induced incandescence (LII) . Laser excitation of thermographic phosphors can be used to measure temperature in flows seeded with such luminescent particles or on surfaces in combustion systems such as engines. , Laser-induced breakdown spectroscopy (LIBS) has been applied to determine temperature and species concentrations in gaseous and solid fuel combustion. − Quantum cascade lasers enable further recent developments to detect trace species in reacting flows, including cavity-assisted photothermal spectroscopy and Faraday rotation spectroscopy. − …”

Section: Combustion Chemistry Methodologymentioning

confidence: 99%

“…Laser diagnostics in combustion with these and other techniques can bridge scales from the molecular level of elementary reaction kinetics to practical systems , using set-ups from sophisticated laser combinations in dedicated laboratories ,− , to sensors that can be deployed for measurements in the field. ,− Optical characterization of combustion processes can further include the detection and interpretation of flame luminosity e.g., from chemiluminescence emissions of excited molecules. ,, …”

Section: Combustion Chemistry Methodologymentioning

confidence: 99%

“…163−165 Quantum cascade lasers enable further recent developments to detect trace species in reacting flows, including cavity-assisted photothermal spectroscopy and Faraday rotation spectroscopy. 166−168 Laser diagnostics in combustion with these and other techniques can bridge scales from the molecular level of elementary reaction kinetics 168 to practical systems 169,170 using set-ups from sophisticated laser combinations in dedicated laboratories 132,[135][136][137][138]159 to sensors that can be deployed for measurements in the field. 140,169−171 Optical characterization of combustion processes can further include the detection and Figure 7.…”

Section: Combustion Chemistry Experiments and Diagnosticsmentioning

confidence: 99%

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Combustion, Chemistry, and Carbon Neutrality

Kohse‐Höinghaus

2023

Chem. Rev.

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Combustion is a reactive oxidation process that releases energy bound in chemical compounds used as fuels�energy that is needed for power generation, transportation, heating, and industrial purposes. Because of greenhouse gas and local pollutant emissions associated with fossil fuels, combustion science and applications are challenged to abandon conventional pathways and to adapt toward the demand of future carbon neutrality. For the design of efficient, low-emission processes, understanding the details of the relevant chemical transformations is essential. Comprehensive knowledge gained from decades of fossil-fuel combustion research includes general principles for establishing and validating reaction mechanisms and process models, relying on both theory and experiments with a suite of analytic monitoring and sensing techniques. Such knowledge can be advantageously applied and extended to configure, analyze, and control new systems using different, nonfossil, potentially zero-carbon fuels. Understanding the impact of combustion and its links with chemistry needs some background. The introduction therefore combines information on exemplary cultural and technological achievements using combustion and on nature and effects of combustion emissions. Subsequently, the methodology of combustion chemistry research is described. A major part is devoted to fuels, followed by a discussion of selected combustion applications, illustrating the chemical information needed for the future.

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Section: Combustion Chemistry Methodologymentioning

confidence: 99%

Section: Combustion Chemistry Methodologymentioning

confidence: 99%

Section: Combustion Chemistry Experiments and Diagnosticsmentioning

confidence: 99%

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Combustion, Chemistry, and Carbon Neutrality

Kohse‐Höinghaus

2023

Chem. Rev.

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“…The experimental setup shown in Figure 1 is described in detail previously 26, 37–40 . Here we only provide a brief description.…”

Section: Methodsmentioning

confidence: 99%

“…Recently, Teng et al 37, 38 . and Zhong et al 39 . demonstrated the application of line‐scanned FRS for quantitative and time‐resolved measurements of HO 2 in O( 1 D) and HO 2 kinetic studies.…”

Section: Introductionmentioning

confidence: 99%

Kinetic studies of excited singlet oxygen atom O(¹D) reactions with ethanol

Zhong

Yan

Teng

et al. 2021

Int J of Chemical Kinetics

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The multichannel reaction of excited singlet oxygen atom with ethanol, O(1D) + C2H5OH (1), was studied in a photolysis flow reactor coupled with mid‐infrared Faraday rotation spectroscopy (FRS) and UV‐IR direct absorption spectroscopy (DAS) at 297 K with reactor pressures of 60, 120, and 150 Torr (bath He). The excited singlet oxygen atom was generated through the photolysis of O3 at 266 nm. The photon flux and O(1D) concentrations were determined by in situ actinometry based on O3 depletion. Temporal profiles of OH and H2O were monitored via DAS signals at ca. 3568.62 and 3568.29 cm−1, while temporal profiles of HO2 were measured via FRS signals at ca. 1396.90 cm−1. The branching ratios of the target reaction (1) were determined by fitting temporal profiles to simulations from an in‐house reaction mechanism. Two major reaction channels were identified as CH3CHOH + OH and CH3O + CH2OH, and their branching ratios were determined as 0.46 ± 0.12 and 0.42 ± 0.11, respectively. A specific HO2 + RO2 reaction between HO2 and O2CH2CH2OH (β‐RO2) at the low‐temperature range is estimated in this work as HO2 + O2CH2CH2OH ⟶ products with a rate constant of 7 × 10−12 cm3 molecule−1 s−1.

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