The Effect of CO2 Dilution on the Laminar Burning Velocity of Premixed Methane/Air Flames

Yii Chan, Mingming Zhu, Zhezi Zhang, Pengfei Liu, Dongke Zhang

Research output: Chapter in Book/Conference paperConference paper

30 Citations (Scopus)

Abstract

© 2015 Published by Elsevier Ltd. The effect of CO2 dilution on the laminar flame speed of methane/air mixture was studied by means of experimentation and kinetic modelling. Experiments were conducted using a flat-flame burner at atmospheric pressure and 298K over the methane/air equivalence ratio range of 0.8 to 1.4. Kinetic modelling was performed using Chemkin Pro, with the skeletal version of Le Cong et al.'s kinetic mechanisms. It was found that the laminar flame speeds measured using the flat flame method were accurate, supported and validated by the literature data. The laminar flame speed of CH4/air decreased with increasing CO2 dilution. The increase in CO2 concentration reduced the reactants' concentrations, decreasing the net reaction rate (and thus the flame speed). In addition, CO2 also acts as a heat sink, causing a drop in the reaction temperature and thus lowering the ability to overcome the activation energy for reactions to occur. This study contributes to the understandings of the effect of inert gas on the flammability characteristics of methane.
Original languageEnglish
Title of host publicationEnergy Procedia
Place of PublicationNetherlands
PublisherElsevier
Pages3048-3053
Volume75
ISBN (Print)18766102
DOIs
Publication statusPublished - Aug 2015
Event7th International Conference on Applied Energy, ICAE 2015 - United Arab Emirates, Abu Dhabi, United Arab Emirates
Duration: 28 Mar 201531 Mar 2015
Conference number: 114863

Conference

Conference7th International Conference on Applied Energy, ICAE 2015
Abbreviated titleICAE 2015
CountryUnited Arab Emirates
CityAbu Dhabi
Period28/03/1531/03/15

Fingerprint

Dilution
Methane
Air
Kinetics
Flammability
Heat sinks
Inert gases
Fuel burners
Atmospheric pressure
Reaction rates
Activation energy
Experiments
Temperature

Cite this

Chan, Yii ; Zhu, Mingming ; Zhang, Zhezi ; Liu, Pengfei ; Zhang, Dongke. / The Effect of CO2 Dilution on the Laminar Burning Velocity of Premixed Methane/Air Flames. Energy Procedia. Vol. 75 Netherlands : Elsevier, 2015. pp. 3048-3053
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Chan, Y, Zhu, M, Zhang, Z, Liu, P & Zhang, D 2015, The Effect of CO2 Dilution on the Laminar Burning Velocity of Premixed Methane/Air Flames. in Energy Procedia. vol. 75, Elsevier, Netherlands, pp. 3048-3053, 7th International Conference on Applied Energy, ICAE 2015, Abu Dhabi, United Arab Emirates, 28/03/15. https://doi.org/10.1016/j.egypro.2015.07.621

The Effect of CO2 Dilution on the Laminar Burning Velocity of Premixed Methane/Air Flames. / Chan, Yii; Zhu, Mingming; Zhang, Zhezi; Liu, Pengfei; Zhang, Dongke.

Energy Procedia. Vol. 75 Netherlands : Elsevier, 2015. p. 3048-3053.

Research output: Chapter in Book/Conference paperConference paper

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N2 - © 2015 Published by Elsevier Ltd. The effect of CO2 dilution on the laminar flame speed of methane/air mixture was studied by means of experimentation and kinetic modelling. Experiments were conducted using a flat-flame burner at atmospheric pressure and 298K over the methane/air equivalence ratio range of 0.8 to 1.4. Kinetic modelling was performed using Chemkin Pro, with the skeletal version of Le Cong et al.'s kinetic mechanisms. It was found that the laminar flame speeds measured using the flat flame method were accurate, supported and validated by the literature data. The laminar flame speed of CH4/air decreased with increasing CO2 dilution. The increase in CO2 concentration reduced the reactants' concentrations, decreasing the net reaction rate (and thus the flame speed). In addition, CO2 also acts as a heat sink, causing a drop in the reaction temperature and thus lowering the ability to overcome the activation energy for reactions to occur. This study contributes to the understandings of the effect of inert gas on the flammability characteristics of methane.

AB - © 2015 Published by Elsevier Ltd. The effect of CO2 dilution on the laminar flame speed of methane/air mixture was studied by means of experimentation and kinetic modelling. Experiments were conducted using a flat-flame burner at atmospheric pressure and 298K over the methane/air equivalence ratio range of 0.8 to 1.4. Kinetic modelling was performed using Chemkin Pro, with the skeletal version of Le Cong et al.'s kinetic mechanisms. It was found that the laminar flame speeds measured using the flat flame method were accurate, supported and validated by the literature data. The laminar flame speed of CH4/air decreased with increasing CO2 dilution. The increase in CO2 concentration reduced the reactants' concentrations, decreasing the net reaction rate (and thus the flame speed). In addition, CO2 also acts as a heat sink, causing a drop in the reaction temperature and thus lowering the ability to overcome the activation energy for reactions to occur. This study contributes to the understandings of the effect of inert gas on the flammability characteristics of methane.

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