Experimental and Modeling Investigation of the Low-Temperature Oxidation of Dimethyl Ether

Published on Jul 16, 2015in Analytical Chemistry6.35
· DOI :10.1021/acs.jpca.5b01939
Anne Rodriguez7
Estimated H-index: 7
(Princeton University),
Ophélie Frottier5
Estimated H-index: 5
+ 4 AuthorsFrédérique Battin-Leclerc46
Estimated H-index: 46
The oxidation of dimethyl ether (DME) was studied using a jet-stirred reactor over a wide range of conditions: temperatures from 500 to 1100 K; equivalence ratios of 0.25, 1, and 2; residence time of 2 s; pressure of 106.7 kPa (close to the atmospheric pressure); and an inlet fuel mole fraction of 0.02 (with high dilution in helium). Reaction products were quantified using two analysis methods: gas chromatography and continuous wave cavity ring-down spectroscopy (cw-CRDS). cw-CRDS enabled the quantification of formaldehyde, which is one of the major products from DME oxidation, as well as that of hydrogen peroxide, which is an important branching agent in low-temperature oxidation chemistry. Experimental data were compared with data computed using models from the literature with important deviations being observed for the reactivity at low-temperature. A new detailed kinetic model for the oxidation of DME was developed in this study. Kinetic parameters used in this model were taken from literature or calc...
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