The kinetic study of excited singlet oxygen atom O(1D) reactions with acetylene

Yan, Chao; Teng, Chu C.; Chen, Timothy; Zhong, Hongtao; Rousso, Aric; Zhao, Hao; Guo, Ma; Wysocki, Gerard; Ju, Yiguang

doi:10.1016/j.combustflame.2019.10.034

Cited by 14 publications

(11 citation statements)

References 36 publications

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“…Uncertainties in the OH cross sections and uncertainties in the OH absorption length are folded into an total uncertainty of 10%. Our previous work 40 indicated an uncertainty of 16% in the OH measurements. Such a discrepancy may originate from the improvement of the optical alignment and better tuning of the laser conditions.…”

Section: Resultsmentioning

confidence: 95%

“…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%

“…In this work, we applied in situ laser light actinometry to determine the photon flux F (photons cm −2 ) and further the absolute concentration of O( 1 D). Discussions of this technique can be found elsewhere 35, 40 . In the photolysis of O 3 /O 2 /He mixtures at 60 Torr, 297 K, the UV‐DAS signals at 253.65 nm is monitored by an imaging spectrometer (Acton 2500i) together with a photomultiplier tube (Hamamatsu R7154) with an amplifier (Hamamatsu C6271).…”

Section: Methodsmentioning

confidence: 99%

“…The absorption cross section of the OH radical at 3568.52 cm −1 was calibrated using well‐studied chemical reactions O 3 + h

ν false(266 normalnm false) ⟶ O (^{1} normalD false) + {normalO}_{2}

and

O (^{1} normalD false) + {normalH}_{2} O ⟶ 2 OH

. The method was discussed in previous publications, 40 and the measured absorption cross section in this work was

σ_{normalOH} = false(3.75 \pm 0.31 false) \times 10^{- 18}

cm 2 molecule −1 at 60 Torr and

false(2.30 \pm 0.21 false) \times 10^{- 18}

cm 2 molecule −1 at 120 Torr. The absorption cross section of H 2 O at 3568.29 cm −1 used in this work is

σ_{{normalH}_{2} O} = false(2.45 \pm 0.25 false) \times 10^{- 19}

cm 2 molecule −1 at 60 Torr and

false(1.26 \pm 0.15 false) \times 10^{- 19}

cm 2 molecule −1 at 120 Torr.…”

Section: Methodsmentioning

confidence: 99%

“…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. Yan et al 40 . and Zhong et al 26 .…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 95%

“…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%

Section: Methodsmentioning

confidence: 99%

“…The absorption cross section of the OH radical at 3568.52 cm −1 was calibrated using well‐studied chemical reactions O 3 + h

ν false(266 normalnm false) ⟶ O (^{1} normalD false) + {normalO}_{2}

and

O (^{1} normalD false) + {normalH}_{2} O ⟶ 2 OH

. The method was discussed in previous publications, 40 and the measured absorption cross section in this work was

σ_{normalOH} = false(3.75 \pm 0.31 false) \times 10^{- 18}

cm 2 molecule −1 at 60 Torr and

false(2.30 \pm 0.21 false) \times 10^{- 18}

cm 2 molecule −1 at 120 Torr. The absorption cross section of H 2 O at 3568.29 cm −1 used in this work is

σ_{{normalH}_{2} O} = false(2.45 \pm 0.25 false) \times 10^{- 19}

cm 2 molecule −1 at 60 Torr and

false(1.26 \pm 0.15 false) \times 10^{- 19}

cm 2 molecule −1 at 120 Torr.…”

Section: Methodsmentioning

confidence: 99%

“…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. Yan et al 40 . and Zhong et al 26 .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations