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Sampling Probe Influences on Temperature and Species Concentrations in Molecular Beam Mass Spectroscopic Investigations of Flat Premixed Low-pressure Flames

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Published/Copyright: September 25, 2009
Zeitschrift für Physikalische Chemie
From the journal Zeitschrift für Physikalische Chemie Volume 223 Issue 4-5

Abstract

New operating regimes for engines and combustors and the advocated use of non-conventional transportation fuels demand investigation of the combustion chemistry of different classes of chemicals, especially under premixed conditions. Detailed species compositions during combustion are needed to estimate hazardous emissions, and models for their prediction must be validated for the intended combustion conditions.Molecular-beam mass spectrometry (MBMS) is a common technique to measure quantitative species concentrations in flames. It is widely employed to characterize the flame chemistry of laminar premixed combustion, and it has been complemented with optical measurements for the detection of a number of molecular species and radicals. Significant progress has been made in recent studies through the introduction of synchrotron-based MBMS instruments. They have improved the identification process by using tunable vacuum-ultraviolet radiation for photoionization of the species to be detected, and isomer-specific measurements are now almost routinely possible. Along with quantitative species measurements, the temperature profile is needed as input parameter for chemical kinetic modeling. It is usually determined either using thermocouples or laser spectroscopic techniques.It is an ongoing discussion how sampling probes affect these measurements, and how MBMS results can be compared to combustion modeling. The present article is intended to contribute to this discussion by providing optical and MBMS results obtained with several sampling configurations.

Keywords: Molecular Beam Mass Spectroscopy; Low-pressure Flames
* Correspondence address: Bielefeld University, Department of Chemistry, Department of Chemistry, 33615 Bielefeld, Deutschland,
Published Online: 2009-9-25
Published in Print: 2009-5-1

© by Oldenbourg Wissenschaftsverlag, München, Germany

Articles in the same Issue

  1. Preface
  2. Towards Simplified Thermal and Specific Rigidity Factors for Ion-Molecule Reactions and Ion Fragmentations
  3. Chemistry and Microphysics of Atmospheric Aerosol Surfaces: Laboratory Techniques and Applications
  4. The Products of the Reactions of o-Benzyne with Ethene, Propene, and Acetylene: A Combined Mass Spectrometric and Quantum Chemical Study
  5. CH2Cl and CHCl2 Radical Chemistry: The Formation by the Reactions CH3Cl + F and CH2Cl2 + F and The Destruction by the Reactions CH2Cl + O and CHCl2 + O
  6. Formation of H-atoms in the Pyrolysis of 1,3-butadiene and 2-butyne: A Shock Tube and Modelling Study
  7. High-level Ab-initio Calculations for Astrochemically Relevant Polyynes (HC2nH), their Isomers (C2nH2) and their Anions (C2nH−)
  8. Investigation of the Hierarchical Structure of Kinetic Models in Ignition Problems
  9. Laser Diagnostics for the Model Development in Turbulent Premixed Flames
  10. Sampling Probe Influences on Temperature and Species Concentrations in Molecular Beam Mass Spectroscopic Investigations of Flat Premixed Low-pressure Flames
  11. Shock-Tube Study of the Reactions of Hydrogen Atoms with Benzene and Phenyl Radicals
  12. The Generation of a Compact n-Heptane / Toluene Reaction Mechanism Using the Chemistry Guided Reduction (CGR) Technique
  13. Modeling of Rich Premixed C2H4/O2/Ar and C2H4/Dimethoxymethane/O2/Ar Flames
  14. Conformation and Aggregation of Proline Esters and Their Aromatic Homologs: Pyramidal vs. Planar RR´N-H in Hydrogen Bonds
  15. A Two-equation Model to Simulate Soot Formation under Shock-tube Conditions
  16. CO Formation in the 254 nm Gas Phase Photolysis of Nitrosobenzene-Oxygen Mixtures at Room Temperature
  17. Experimental and Numerical Investigation of Fe(CO)5 Addition to a Laminar Premixed Hydrogen/Oxygen/Argon Flame
  18. Structures of Laminar Methane/Nitrogen/Oxygen, Methane/Oxygen and Methane/Liquid Oxygen Counterflow Flames for Cryogenic Conditions and Elevated Pressures
https://doi.org/10.1524/zpch.2009.6049
Keywords for this article
Molecular Beam Mass Spectroscopy; Low-pressure Flames

Articles in the same Issue

  1. Preface
  2. Towards Simplified Thermal and Specific Rigidity Factors for Ion-Molecule Reactions and Ion Fragmentations
  3. Chemistry and Microphysics of Atmospheric Aerosol Surfaces: Laboratory Techniques and Applications
  4. The Products of the Reactions of o-Benzyne with Ethene, Propene, and Acetylene: A Combined Mass Spectrometric and Quantum Chemical Study
  5. CH2Cl and CHCl2 Radical Chemistry: The Formation by the Reactions CH3Cl + F and CH2Cl2 + F and The Destruction by the Reactions CH2Cl + O and CHCl2 + O
  6. Formation of H-atoms in the Pyrolysis of 1,3-butadiene and 2-butyne: A Shock Tube and Modelling Study
  7. High-level Ab-initio Calculations for Astrochemically Relevant Polyynes (HC2nH), their Isomers (C2nH2) and their Anions (C2nH−)
  8. Investigation of the Hierarchical Structure of Kinetic Models in Ignition Problems
  9. Laser Diagnostics for the Model Development in Turbulent Premixed Flames
  10. Sampling Probe Influences on Temperature and Species Concentrations in Molecular Beam Mass Spectroscopic Investigations of Flat Premixed Low-pressure Flames
  11. Shock-Tube Study of the Reactions of Hydrogen Atoms with Benzene and Phenyl Radicals
  12. The Generation of a Compact n-Heptane / Toluene Reaction Mechanism Using the Chemistry Guided Reduction (CGR) Technique
  13. Modeling of Rich Premixed C2H4/O2/Ar and C2H4/Dimethoxymethane/O2/Ar Flames
  14. Conformation and Aggregation of Proline Esters and Their Aromatic Homologs: Pyramidal vs. Planar RR´N-H in Hydrogen Bonds
  15. A Two-equation Model to Simulate Soot Formation under Shock-tube Conditions
  16. CO Formation in the 254 nm Gas Phase Photolysis of Nitrosobenzene-Oxygen Mixtures at Room Temperature
  17. Experimental and Numerical Investigation of Fe(CO)5 Addition to a Laminar Premixed Hydrogen/Oxygen/Argon Flame
  18. Structures of Laminar Methane/Nitrogen/Oxygen, Methane/Oxygen and Methane/Liquid Oxygen Counterflow Flames for Cryogenic Conditions and Elevated Pressures
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