Photoionization mass spectrometry and modeling studies of the chemistry of fuel-rich dimethyl ether flames

Cool, Terrill A.; Wang, Juan; Hansen, Nils; Westmoreland, Phillip R.; Dryer, Fredrick L.; Zhao, Zhenwei; Kazakov, Andrei; Kasper, Tina; Kohse-Höinghaus, Katharina

doi:10.1016/j.proci.2006.08.044

Photoionization mass spectrometry and modeling studies of the chemistry of fuel-rich dimethyl ether flames

Journal Article · Mon Jan 01 04:00:00 EST 2007 · Proceedings of the Combustion Institute

DOI:https://doi.org/10.1016/j.proci.2006.08.044· OSTI ID:1062408

Cool, Terrill A. ^[1]; Wang, Juan; Hansen, Nils; Westmoreland, Phillip R.; Dryer, Fredrick L.; Zhao, Zhenwei; Kazakov, Andrei; Kasper, Tina; Kohse-Höinghaus, Katharina

Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551

Reaction paths are identified for dimethyl ether (DME) combustion using modeling of new data from fuel-rich DME flat flames. A molecular-beam flame-sampling photoionization mass spectrometer, employing VUV synchrotron radiation, is applied to the measurement of mole fractions for 21 flame species in low-pressure premixed fuel-rich (Phi = 1.2, 1.68) DME/oxygen/argon flat flames. This approach is capable of resolving and identifying isomers and other flame species of near equal masses with ionization thresholds that differ by as little as 0.1 eV. The measurements agree well with flame modeling predictions, using a recently revised high-temperature DME kinetic mechanism, which identify reaction paths quite analogous to alkane combustion. They further reveal the presence of ethyl methyl ether, a molecule previously unobserved in flames and not included in present flame models.

Research Organization:: Cornell Univ., Ithaca, NY (United States)

Sponsoring Organization:: USDOE Office of Energy Research (ER)

DOE Contract Number:: FG02-01ER15180

OSTI ID:: 1062408

Report Number(s):: DOE-ER15180-24

Journal Information:: Proceedings of the Combustion Institute, Journal Name: Proceedings of the Combustion Institute Journal Issue: 1 Vol. 31; ISSN 1540-7489

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

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