Details
| Original language | English |
|---|---|
| Pages (from-to) | 37867-37872 |
| Number of pages | 6 |
| Journal | RSC Advances |
| Volume | 7 |
| Issue number | 60 |
| Early online date | 1 Aug 2017 |
| Publication status | Published - 2017 |
Abstract
Microwave spectroscopy probes the rotational transitions of polar molecules in the gas phase and is a proven technique for the detection and identification of short-lived molecules produced from a variety of molecular sources. In this explorative study, we demonstrate that two prerequisites can be met for microwave spectroscopy to become a quantitative tool for the analysis of high-temperature gas mixtures as found in combustion environments. First, we show that the rotational temperature of the targeted species can be sufficiently cooled to allow for a sensitive detection of low-lying rotational states after sampling from hot (∼2200 K) flames. Second, we show that signal intensity profiles can be assembled which, after correcting for the different flame temperatures at various sampling positions, agree well with mole fraction profiles obtained via flame-sampling molecular-beam mass spectrometry. Based on the described results, it is conceivable that rotational spectroscopy can contribute towards the unraveling of complex, high-temperature reaction networks.
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Chemical Engineering(all)
- General Chemical Engineering
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In: RSC Advances, Vol. 7, No. 60, 2017, p. 37867-37872.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Microwave spectroscopic detection of flame-sampled combustion intermediates
AU - Hansen, N.
AU - Wullenkord, J.
AU - Obenchain, D. A.
AU - Graf, I.
AU - Kohse-Höinghaus, K.
AU - Grabow, J. U.
N1 - Funding Information: This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-NA0003525. The Bielefeld group acknowledges partial support by Deutsche Forschungsgemeinschaft (DFG) under contract KO 1363/31-1. The Hannover group is grateful for financial support from the DFG and the Land Niedersachsen. Publisher Copyright: © 2017 The Royal Society of Chemistry. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2017
Y1 - 2017
N2 - Microwave spectroscopy probes the rotational transitions of polar molecules in the gas phase and is a proven technique for the detection and identification of short-lived molecules produced from a variety of molecular sources. In this explorative study, we demonstrate that two prerequisites can be met for microwave spectroscopy to become a quantitative tool for the analysis of high-temperature gas mixtures as found in combustion environments. First, we show that the rotational temperature of the targeted species can be sufficiently cooled to allow for a sensitive detection of low-lying rotational states after sampling from hot (∼2200 K) flames. Second, we show that signal intensity profiles can be assembled which, after correcting for the different flame temperatures at various sampling positions, agree well with mole fraction profiles obtained via flame-sampling molecular-beam mass spectrometry. Based on the described results, it is conceivable that rotational spectroscopy can contribute towards the unraveling of complex, high-temperature reaction networks.
AB - Microwave spectroscopy probes the rotational transitions of polar molecules in the gas phase and is a proven technique for the detection and identification of short-lived molecules produced from a variety of molecular sources. In this explorative study, we demonstrate that two prerequisites can be met for microwave spectroscopy to become a quantitative tool for the analysis of high-temperature gas mixtures as found in combustion environments. First, we show that the rotational temperature of the targeted species can be sufficiently cooled to allow for a sensitive detection of low-lying rotational states after sampling from hot (∼2200 K) flames. Second, we show that signal intensity profiles can be assembled which, after correcting for the different flame temperatures at various sampling positions, agree well with mole fraction profiles obtained via flame-sampling molecular-beam mass spectrometry. Based on the described results, it is conceivable that rotational spectroscopy can contribute towards the unraveling of complex, high-temperature reaction networks.
UR - http://www.scopus.com/inward/record.url?scp=85027355653&partnerID=8YFLogxK
U2 - 10.1039/c7ra06483g
DO - 10.1039/c7ra06483g
M3 - Article
AN - SCOPUS:85027355653
VL - 7
SP - 37867
EP - 37872
JO - RSC Advances
JF - RSC Advances
SN - 2046-2069
IS - 60
ER -