Explosion limits of H2/CH4/O2 Mixtures: Analyticity and dominant kinetics

Wenkai Liang; Zirui Liu; Chung K. Law

Explosion limits of H₂/CH₄/O₂ Mixtures: Analyticity and dominant kinetics

Wenkai Liang, Zirui Liu, Chung K. Law

Research output: Contribution to conference › Paper › peer-review

Abstract

The pressure-Temperature explosion limits of H_2/CH_4/O₂ mixtures were analyzed computationally and analytically. It is shown that, with the addition of about 5% of H₂ to the mixture, the explosion limit evolves from being monotonic to the non-monotonic Z-shaped response characteristic of H_2/O_2/ explosions. Such transition is much less sensitive compared with the H_2//CO/O₂ system, which is explained by the different response of the kinetic parameters corresponding to O and OH radical competitions by H₂ and CH₄. Further eigenvalue analysis with appropriate quasi-steady state simplifications leads to accurate analytic solutions for the explosion limits, with explicit expressions for the controlling pathways for different H2 and CH4 concentrations.

Original language	English (US)
State	Published - 2018
Event	2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018 - State College, United States Duration: Mar 4 2018 → Mar 7 2018

Other

Other	2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018
Country/Territory	United States
City	State College
Period	3/4/18 → 3/7/18

All Science Journal Classification (ASJC) codes

Mechanical Engineering
Physical and Theoretical Chemistry
General Chemical Engineering

Keywords

Eigenvalue analysis.
Explosion limits
Syngas
methane

Cite this

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title = "Explosion limits of H2/CH4/O2 Mixtures: Analyticity and dominant kinetics",

abstract = "The pressure-Temperature explosion limits of H2/CH4/O2 mixtures were analyzed computationally and analytically. It is shown that, with the addition of about 5% of H2 to the mixture, the explosion limit evolves from being monotonic to the non-monotonic Z-shaped response characteristic of H2/O2/ explosions. Such transition is much less sensitive compared with the H2//CO/O2 system, which is explained by the different response of the kinetic parameters corresponding to O and OH radical competitions by H2 and CH4. Further eigenvalue analysis with appropriate quasi-steady state simplifications leads to accurate analytic solutions for the explosion limits, with explicit expressions for the controlling pathways for different H2 and CH4 concentrations.",

keywords = "Eigenvalue analysis., Explosion limits, Syngas, methane",

author = "Wenkai Liang and Zirui Liu and Law, {Chung K.}",

note = "Publisher Copyright: {\textcopyright} 2018 Eastern States Section of the Combustion Institute. All rights reserved.; 2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018 ; Conference date: 04-03-2018 Through 07-03-2018",

year = "2018",

language = "English (US)",

}

TY - CONF

T1 - Explosion limits of H2/CH4/O2 Mixtures

T2 - 2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018

AU - Liang, Wenkai

AU - Liu, Zirui

AU - Law, Chung K.

PY - 2018

Y1 - 2018

N2 - The pressure-Temperature explosion limits of H2/CH4/O2 mixtures were analyzed computationally and analytically. It is shown that, with the addition of about 5% of H2 to the mixture, the explosion limit evolves from being monotonic to the non-monotonic Z-shaped response characteristic of H2/O2/ explosions. Such transition is much less sensitive compared with the H2//CO/O2 system, which is explained by the different response of the kinetic parameters corresponding to O and OH radical competitions by H2 and CH4. Further eigenvalue analysis with appropriate quasi-steady state simplifications leads to accurate analytic solutions for the explosion limits, with explicit expressions for the controlling pathways for different H2 and CH4 concentrations.

AB - The pressure-Temperature explosion limits of H2/CH4/O2 mixtures were analyzed computationally and analytically. It is shown that, with the addition of about 5% of H2 to the mixture, the explosion limit evolves from being monotonic to the non-monotonic Z-shaped response characteristic of H2/O2/ explosions. Such transition is much less sensitive compared with the H2//CO/O2 system, which is explained by the different response of the kinetic parameters corresponding to O and OH radical competitions by H2 and CH4. Further eigenvalue analysis with appropriate quasi-steady state simplifications leads to accurate analytic solutions for the explosion limits, with explicit expressions for the controlling pathways for different H2 and CH4 concentrations.

KW - Eigenvalue analysis.

KW - Explosion limits

KW - Syngas

KW - methane

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Y2 - 4 March 2018 through 7 March 2018

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