Numerical Model for the Chemical Kinetics of Potassium Species in Methane/Air Cup-Burner Flames

Tian W. Zhang; Hao Liu; Zhi Y. Han; Zhi M. Du; Zi D. Guo

doi:10.1021/acs.energyfuels.7b00106

Numerical Model for the Chemical Kinetics of Potassium Species in Methane/Air Cup-Burner Flames

Tian W. Zhang, Hao Liu, Zhi Y. Han^*, Zhi M. Du, Zi D. Guo

^*Corresponding author for this work

School of Mechatronical Engineering

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

A model based on the perfectly stirred reactor (PSR) concept is used to correlate the minimum extinguishing concentration (MEC) of gaseous KOH, which was established in the cup-burner experiment. Both physical and chemical mechanisms of fire suppression are considered in PSR modeling. The combustion process of the CH₄/air and gaseous KOH mixture contains a complex chain branch reaction. A high gaseous KOH concentration of type K agent in the methane flame results in strong flame inhibition. The influence of gaseous KOH on the combustion process involves capturing OH free radicals in the flames and reaching the inhibition effect by controlling key elementary reactions containing OH radicals in the combustion process. By calculation of the intermediate product production rate of the fire-extinguishing agent at a high temperature through the PSR model, the main paths of gaseous KOH inhibiting the methane combustion reaction can be obtained. An increased KOH concentration will not change the reaction mechanism.

Original language	English
Pages (from-to)	4520-4530
Number of pages	11
Journal	Energy and Fuels
Volume	31
Issue number	4
DOIs	https://doi.org/10.1021/acs.energyfuels.7b00106
Publication status	Published - 20 Apr 2017

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10.1021/acs.energyfuels.7b00106

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title = "Numerical Model for the Chemical Kinetics of Potassium Species in Methane/Air Cup-Burner Flames",

abstract = "A model based on the perfectly stirred reactor (PSR) concept is used to correlate the minimum extinguishing concentration (MEC) of gaseous KOH, which was established in the cup-burner experiment. Both physical and chemical mechanisms of fire suppression are considered in PSR modeling. The combustion process of the CH4/air and gaseous KOH mixture contains a complex chain branch reaction. A high gaseous KOH concentration of type K agent in the methane flame results in strong flame inhibition. The influence of gaseous KOH on the combustion process involves capturing OH free radicals in the flames and reaching the inhibition effect by controlling key elementary reactions containing OH radicals in the combustion process. By calculation of the intermediate product production rate of the fire-extinguishing agent at a high temperature through the PSR model, the main paths of gaseous KOH inhibiting the methane combustion reaction can be obtained. An increased KOH concentration will not change the reaction mechanism.",

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AU - Zhang, Tian W.

AU - Liu, Hao

AU - Han, Zhi Y.

AU - Du, Zhi M.

AU - Guo, Zi D.

PY - 2017/4/20

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N2 - A model based on the perfectly stirred reactor (PSR) concept is used to correlate the minimum extinguishing concentration (MEC) of gaseous KOH, which was established in the cup-burner experiment. Both physical and chemical mechanisms of fire suppression are considered in PSR modeling. The combustion process of the CH4/air and gaseous KOH mixture contains a complex chain branch reaction. A high gaseous KOH concentration of type K agent in the methane flame results in strong flame inhibition. The influence of gaseous KOH on the combustion process involves capturing OH free radicals in the flames and reaching the inhibition effect by controlling key elementary reactions containing OH radicals in the combustion process. By calculation of the intermediate product production rate of the fire-extinguishing agent at a high temperature through the PSR model, the main paths of gaseous KOH inhibiting the methane combustion reaction can be obtained. An increased KOH concentration will not change the reaction mechanism.

AB - A model based on the perfectly stirred reactor (PSR) concept is used to correlate the minimum extinguishing concentration (MEC) of gaseous KOH, which was established in the cup-burner experiment. Both physical and chemical mechanisms of fire suppression are considered in PSR modeling. The combustion process of the CH4/air and gaseous KOH mixture contains a complex chain branch reaction. A high gaseous KOH concentration of type K agent in the methane flame results in strong flame inhibition. The influence of gaseous KOH on the combustion process involves capturing OH free radicals in the flames and reaching the inhibition effect by controlling key elementary reactions containing OH radicals in the combustion process. By calculation of the intermediate product production rate of the fire-extinguishing agent at a high temperature through the PSR model, the main paths of gaseous KOH inhibiting the methane combustion reaction can be obtained. An increased KOH concentration will not change the reaction mechanism.

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Numerical Model for the Chemical Kinetics of Potassium Species in Methane/Air Cup-Burner Flames

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