کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
240731 | 1427929 | 2007 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Photoionization mass spectrometry and modeling studies of the chemistry of fuel-rich dimethyl ether flames Photoionization mass spectrometry and modeling studies of the chemistry of fuel-rich dimethyl ether flames](/preview/png/240731.png)
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 (Φ = 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.
Journal: Proceedings of the Combustion Institute - Volume 31, Issue 1, January 2007, Pages 285–293