Effects of Oxygen Enrichment and Hydrogen Addition on CF4 Decomposition in Methane/Air Counterflow Flames

Ki Yong Lee

doi:10.15231/jksc.2025.30.4.019

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Research Article

Effects of Oxygen Enrichment and Hydrogen Addition on CF₄ Decomposition in Methane/Air Counterflow Flames 메탄/공기 대향류 화염에서 산소부화 및 수소 첨가가 CF₄ 분해에 미치는 영향

31 December 2025. pp. 19-24

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Abstract

A numerical analysis is performed to investigate the decomposition rate of CF₄ added to the oxidizer side in non-premixed counterflow flames of methane with an initial pressure and temperature of 1 atm and 295 K, respectively, under oxygen-enhanced conditions on the oxidizer side or hydrogen added to the fuel side. Furthermore, the changes in axial velocity, maximum flame temperature, and NO concentration are analyzed in flames with a strain rate of 100 s^-1. An increase in either the oxygen enrichment rate or the hydrogen addition allows a greater amount of CF₄to be added to the oxidizer without flame quenching, while simultaneously enhancing the CF₄decomposition rate. As the extinguishing condition is approached, the maximum concentration of nitrogen oxide decreases rapidly unlike the maximum flame temperature which decreases linearly.

Keywords

Carbon tetrafluoride

Counterflow flame

Strain rate

Oxygen enhanced flame

Decomposition rate

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Information

Publisher :The Korean Society of Combustion
Publisher(Ko) :한국연소학회
Journal Title :Journal of the Korean Society of Combustion
Journal Title(Ko) :한국연소학회지
Volume : 30
No :4
Pages :19-24
Received Date : 2025-09-01
Revised Date : 2025-09-27
Accepted Date : 2025-10-12
DOI :https://doi.org/10.15231/jksc.2025.30.4.019

Journal of the Korean Society of Combustion ISSN:1226-0959(Print) 2466-2089(Online) 한국연소학회지

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