Kinetic study of reaction CH3OCH3 + O(1D) in a photolysis reactor with time-resolved Faraday rotation spectroscopy

Hongtao Zhong; Bowen Mei; Andy Thawko; Yiguang Ju

doi:10.2514/6.2025-0396

Kinetic study of reaction CH₃OCH₃ + O(1D) in a photolysis reactor with time-resolved Faraday rotation spectroscopy

Hongtao Zhong, Bowen Mei, Andy Thawko, Yiguang Ju

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The kinetics of dimethyl ether (DME) with electronically excited oxygen atom O(1D) generated from ultraviolet photolysis of ozone were studied in a Herriott cell. Intermediate species, including the hydroperoxyl radical (HO₂), the hydroxyl radical (OH), formaldehyde and water, were resolved within millisecond or microsecond time scales in situ using Faraday rotation spectroscopy (FRS) and direct absorption spectroscopy (DAS). The branching ratios of CH₃O + CH₃O, CH₃OCH₂ + OH, and CH₃O + CH₂OH were determined based on fittings to experimental time-dependent concentration retrievals.

Original language	English (US)
Title of host publication	AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025
Publisher	American Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)	9781624107238
DOIs	https://doi.org/10.2514/6.2025-0396
State	Published - 2025
Event	AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025 - Orlando, United States Duration: Jan 6 2025 → Jan 10 2025

Publication series

Name	AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025

Conference

Conference	AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025
Country/Territory	United States
City	Orlando
Period	1/6/25 → 1/10/25

All Science Journal Classification (ASJC) codes

Aerospace Engineering

Access to Document

10.2514/6.2025-0396

Cite this

Zhong, H., Mei, B., Thawko, A., & Ju, Y. (2025). Kinetic study of reaction CH₃OCH₃ + O(1D) in a photolysis reactor with time-resolved Faraday rotation spectroscopy. In AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025 (AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2025-0396

Zhong, Hongtao ; Mei, Bowen ; Thawko, Andy et al. / Kinetic study of reaction CH₃OCH₃ + O(1D) in a photolysis reactor with time-resolved Faraday rotation spectroscopy. AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025. American Institute of Aeronautics and Astronautics Inc, AIAA, 2025. (AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025).

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title = "Kinetic study of reaction CH3OCH3 + O(1D) in a photolysis reactor with time-resolved Faraday rotation spectroscopy",

abstract = "The kinetics of dimethyl ether (DME) with electronically excited oxygen atom O(1D) generated from ultraviolet photolysis of ozone were studied in a Herriott cell. Intermediate species, including the hydroperoxyl radical (HO2), the hydroxyl radical (OH), formaldehyde and water, were resolved within millisecond or microsecond time scales in situ using Faraday rotation spectroscopy (FRS) and direct absorption spectroscopy (DAS). The branching ratios of CH3O + CH3O, CH3OCH2 + OH, and CH3O + CH2OH were determined based on fittings to experimental time-dependent concentration retrievals.",

author = "Hongtao Zhong and Bowen Mei and Andy Thawko and Yiguang Ju",

note = "Publisher Copyright: {\textcopyright} 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.; AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025 ; Conference date: 06-01-2025 Through 10-01-2025",

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doi = "10.2514/6.2025-0396",

language = "English (US)",

isbn = "9781624107238",

series = "AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025",

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Zhong, H, Mei, B, Thawko, A & Ju, Y 2025, Kinetic study of reaction CH₃OCH₃ + O(1D) in a photolysis reactor with time-resolved Faraday rotation spectroscopy. in AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025. AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025, American Institute of Aeronautics and Astronautics Inc, AIAA, AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025, Orlando, United States, 1/6/25. https://doi.org/10.2514/6.2025-0396

Kinetic study of reaction CH₃OCH₃ + O(1D) in a photolysis reactor with time-resolved Faraday rotation spectroscopy. / Zhong, Hongtao; Mei, Bowen; Thawko, Andy et al.
AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025. American Institute of Aeronautics and Astronautics Inc, AIAA, 2025. (AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AB - The kinetics of dimethyl ether (DME) with electronically excited oxygen atom O(1D) generated from ultraviolet photolysis of ozone were studied in a Herriott cell. Intermediate species, including the hydroperoxyl radical (HO2), the hydroxyl radical (OH), formaldehyde and water, were resolved within millisecond or microsecond time scales in situ using Faraday rotation spectroscopy (FRS) and direct absorption spectroscopy (DAS). The branching ratios of CH3O + CH3O, CH3OCH2 + OH, and CH3O + CH2OH were determined based on fittings to experimental time-dependent concentration retrievals.

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Zhong H, Mei B, Thawko A, Ju Y. Kinetic study of reaction CH₃OCH₃ + O(1D) in a photolysis reactor with time-resolved Faraday rotation spectroscopy. In AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025. American Institute of Aeronautics and Astronautics Inc, AIAA. 2025. (AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025). doi: 10.2514/6.2025-0396