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• W2967911916 endingPage "860" @default.
• W2967911916 startingPage "848" @default.
• W2967911916 abstract "Abstract The autoignition and pyrolysis of two C5 ethers, methyl tert butyl ether (MTBE) and 2‐methyltetrahydrofuran (2‐MTHF), are investigated using the shock tube reactor. The experiments are carried out at pressures of 3.5 and 12 atm at temperatures above 1000 K with argon as a diluent gas. By means of direct laser absorption, carbon monoxide time histories and associated chemical kinetic timescales are also determined. It is observed that the competition between ignition and pyrolysis times depends on the temperature and equivalence ratio of the ignition mixture, such that there is a temperature above which pyrolysis predominates oxidative kinetics. This crossover temperature shifts toward higher temperatures for reactive systems with a fixed fuel concentration but higher oxygen content. The resulting experimental observations are also compared with predictions of existing chemical kinetic models from the literature. The results point to differences in chemical reactivity, such that in pyrolysis conditions, the reactivity of the cyclic ether, 2‐MTHF, is generally higher than that of the aliphatic ether, MTBE. While agreement between experimental observations and model predictions is observed under certain conditions, significant variance between observations and predictions is observed under other conditions. With respect to prediction of the pyrolysis time used to capture the global kinetics of pyrolysis, it is observed that the relation of this time to the time needed to attain 90% of the equilibrium CO concentration varies greatly with the result that the models used in this work generally predict a faster initial formation of CO but a much slower approach to the equilibrium concentration. This is thought to arise from the slow transformation of intermediate CH 2 O and CH 2 CO to CO. The chemical kinetic models considered in this work are therefore not capable of predicting the CO time histories during pyrolysis." @default.
• W2967911916 created "2019-08-22" @default.
• W2967911916 creator A5050346338 @default.
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• W2967911916 date "2019-08-14" @default.
• W2967911916 modified "2023-09-24" @default.
• W2967911916 title "Shock tube investigation of methyl tert butyl ether and methyl tetrahydrofuran high‐temperature kinetics" @default.
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• W2967911916 doi "https://doi.org/10.1002/kin.21314" @default.
• W2967911916 hasPublicationYear "2019" @default.
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