A conventional membrane-type stainless steel shock tube has been coupled to a high-repetition-rate time-of-flight mass spectrometer (HRR-TOF-MS) to be used to study complex reaction systems such as the formation of pollutants in combustion processes or formation of nanoparticles from metal containing organic compounds. Opposed to other TOF-MS shock tubes, our instrument is equipped with a modular sampling unit that allows to sample with or without a skimmer. The skimmer unit can be mounted or removed in less than 10 min. Thus, it is possible to adjust the sampling procedure, namely, the mass flux into the ionization chamber of the HRR-TOF-MS, to the experimental situation imposed by species-specific ionization cross sections and vapor pressures. The whole sampling section was optimized with respect to a minimal distance between the nozzle tip inside the shock tube and the ion source inside the TOF-MS. The design of the apparatus is presented and the influence of the skimmer on the measured spectra is demonstrated by comparing data from both operation modes for conditions typical for chemical kinetics experiments. The well-studied thermal decomposition of acetylene has been used as a test system to validate the new setup against kinetics mechanisms reported in literature.
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August 2011
Research Article|
August 25 2011
A shock tube with a high-repetition-rate time-of-flight mass spectrometer for investigations of complex reaction systems
Steffen H. Dürrstein;
Steffen H. Dürrstein
IVG, Institute for Combustion and Gasdynamics and CeNIDE, Center for Nanointegration,
University of Duisburg-Essen
, 47048 Duisburg, Germany
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Mohammad Aghsaee;
Mohammad Aghsaee
IVG, Institute for Combustion and Gasdynamics and CeNIDE, Center for Nanointegration,
University of Duisburg-Essen
, 47048 Duisburg, Germany
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Ludger Jerig;
Ludger Jerig
IVG, Institute for Combustion and Gasdynamics and CeNIDE, Center for Nanointegration,
University of Duisburg-Essen
, 47048 Duisburg, Germany
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Mustapha Fikri;
Mustapha Fikri
IVG, Institute for Combustion and Gasdynamics and CeNIDE, Center for Nanointegration,
University of Duisburg-Essen
, 47048 Duisburg, Germany
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Christof Schulz
Christof Schulz
a)
IVG, Institute for Combustion and Gasdynamics and CeNIDE, Center for Nanointegration,
University of Duisburg-Essen
, 47048 Duisburg, Germany
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Steffen H. Dürrstein
Mohammad Aghsaee
Ludger Jerig
Mustapha Fikri
Christof Schulz
a)
IVG, Institute for Combustion and Gasdynamics and CeNIDE, Center for Nanointegration,
University of Duisburg-Essen
, 47048 Duisburg, Germany
a)
Author to whom correspondence should be addressed. Electronic mail: [email protected].
Rev. Sci. Instrum. 82, 084103 (2011)
Article history
Received:
March 23 2011
Accepted:
August 03 2011
Citation
Steffen H. Dürrstein, Mohammad Aghsaee, Ludger Jerig, Mustapha Fikri, Christof Schulz; A shock tube with a high-repetition-rate time-of-flight mass spectrometer for investigations of complex reaction systems. Rev. Sci. Instrum. 1 August 2011; 82 (8): 084103. https://doi.org/10.1063/1.3627573
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