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Effects of N2O addition on the ignition of H2–O2 mixtures: Experimental and detailed kinetic modeling study

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Title: Effects of N2O addition on the ignition of H2–O2 mixtures: Experimental and detailed kinetic modeling study
Authors: Mathieu, O. olivier.mathieu@tamu.edu, Levacque, A.1, Petersen, E.L.1
Source: International Journal of Hydrogen Energy. Oct2012, Vol. 37 Issue 20, p15393-15405. 13p.
Subjects: Water, Nitrous oxide, Analytical mechanics, Time delay systems, Doped semiconductors, Argon, Shock waves, Temperature measurements
Abstract: Abstract: Ignition delay times of H2/O2 mixtures highly diluted with Ar and doped with various amounts of N2O (100, 400, 1600, 3200 ppm) were measured in a shock tube behind reflected shock waves over a wide range of temperatures (940–1675 K). The pressure range investigated during this work (around 1.6, 13 and 32 atm) allows studying the effect of N2O on hydrogen ignition at pressure conditions that have never been heretofore investigated. Ignition delay times were decreased when N2O was added to the mixture only for the higher nitrous oxide concentrations, and some changes in the activation energy were also observed at 1.5 and 32 atm. When it occurred, the decrease in the ignition delay time was proportional to the amount of N2O added and depended on pressure and temperature conditions. A detailed chemical kinetics model was developed using kinetic mechanisms from the literature. This model predicts well the experimental data obtained during this study and from the literature. The chemical analysis using this model showed that the decrease in the ignition delay time was mainly due to the reaction N2O + M ⇄ N2 + O + M which provides O atoms to strengthen the channel O + H2 ⇄ OH + H. [Copyright &y& Elsevier]
Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 80220168
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Effects of N<subscript>2</subscript>O addition on the ignition of H<subscript>2</subscript>–O<subscript>2</subscript> mixtures: Experimental and detailed kinetic modeling study
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  Data: <searchLink fieldCode="AR" term="%22Mathieu%2C+O%2E%22">Mathieu, O.</searchLink><i> olivier.mathieu@tamu.edu</i><br /><searchLink fieldCode="AR" term="%22Levacque%2C+A%2E%22">Levacque, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Petersen%2C+E%2EL%2E%22">Petersen, E.L.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Oct2012, Vol. 37 Issue 20, p15393-15405. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Water%22">Water</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrous+oxide%22">Nitrous oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Analytical+mechanics%22">Analytical mechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Time+delay+systems%22">Time delay systems</searchLink><br /><searchLink fieldCode="DE" term="%22Doped+semiconductors%22">Doped semiconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Argon%22">Argon</searchLink><br /><searchLink fieldCode="DE" term="%22Shock+waves%22">Shock waves</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+measurements%22">Temperature measurements</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Abstract: Ignition delay times of H2/O2 mixtures highly diluted with Ar and doped with various amounts of N2O (100, 400, 1600, 3200 ppm) were measured in a shock tube behind reflected shock waves over a wide range of temperatures (940–1675 K). The pressure range investigated during this work (around 1.6, 13 and 32 atm) allows studying the effect of N2O on hydrogen ignition at pressure conditions that have never been heretofore investigated. Ignition delay times were decreased when N2O was added to the mixture only for the higher nitrous oxide concentrations, and some changes in the activation energy were also observed at 1.5 and 32 atm. When it occurred, the decrease in the ignition delay time was proportional to the amount of N2O added and depended on pressure and temperature conditions. A detailed chemical kinetics model was developed using kinetic mechanisms from the literature. This model predicts well the experimental data obtained during this study and from the literature. The chemical analysis using this model showed that the decrease in the ignition delay time was mainly due to the reaction N2O + M ⇄ N2 + O + M which provides O atoms to strengthen the channel O + H2 ⇄ OH + H. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.ijhydene.2012.07.071
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        Text: English
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        PageCount: 13
        StartPage: 15393
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        Type: general
      – SubjectFull: Nitrous oxide
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      – SubjectFull: Analytical mechanics
        Type: general
      – SubjectFull: Time delay systems
        Type: general
      – SubjectFull: Doped semiconductors
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      – SubjectFull: Argon
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      – SubjectFull: Shock waves
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      – SubjectFull: Temperature measurements
        Type: general
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      – TitleFull: Effects of N2O addition on the ignition of H2–O2 mixtures: Experimental and detailed kinetic modeling study
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              Text: Oct2012
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