Direct Measurement of High-Temperature Rate Constants of the Thermal Decomposition of Dimethoxymethane, a Shock Tube and Modeling Study

The Journal of Physical Chemistry. a
S L PeukertChristof Schulz

Abstract

Shock-tube experiments have been performed to investigate the thermal decomposition of the oxygenated hydrocarbon dimethoxymethane (DMM; CH3OCH2OCH3). The primary initial reaction channels of DMM decomposition are considered to be the two bond fissions: CH3OCH2OCH3 → CH3O + CH2OCH3 (1) and CH3OCH2OCH3 → CH3 + OCH2OCH3 (2). In the present work, two shock-tube facilities and three different detection techniques have been combined: Behind reflected shock waves, we have carried out time-resolved measurements of (i) the formation of H atoms using the highly sensitive H-ARAS (Atomic Resonance Absorption Spectrometry) technique and (ii) the depletion of the DMM reactant by high-repetition-rate time-of-flight mass spectrometry (HRR-TOF-MS). In addition, (iii) the temperature-dependent composition of stable reaction products was measured in single-pulse shock-tube experiments via gas chromatography (GC/MS). The experiments span a temperature range of 1100-1430 K, a pressure range of 1.2-2.5 bar, and initial reactant mole fractions from 0.5 ppm (for H-ARAS experiments) up to 10 000 ppm (for HRR-TOF-MS experiments). Experimental rate constants ktotal, ktotal = k1 + k2, obtained from these three completely different methods were in excelle...Continue Reading

References

Mar 9, 2007·The Journal of Chemical Physics·Larry A CurtissKrishnan Raghavachari
Apr 7, 2007·The Review of Scientific Instruments·Robert S TranterJohn H Kiefer
Jul 1, 1979·The Review of Scientific Instruments·I KrizancicO Trass
Sep 8, 2011·The Review of Scientific Instruments·Steffen H DürrsteinChristof Schulz
Sep 2, 2016·Angewandte Chemie·Katharina ThenertJürgen Klankermayer

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Citations

Feb 28, 2020·Physical Chemistry Chemical Physics : PCCP·Leonie GolkaMatthias Olzmann
Sep 11, 2019·The Journal of Physical Chemistry. a·Jennifer PowerHenry J Curran
Jul 23, 2019·The Journal of Physical Chemistry. a·Paul SelaSebastian Peukert
Jul 24, 2020·The Journal of Physical Chemistry. a·Hua GuoTimothy Zwier

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