Experimental and Modeling Study of the Temperature and Pressure Dependence of the Reaction C2H5 + O2 (+ M) 鈫?C2H5O2 (+ M)

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• 作者：Ravi X. Fernandes ; Klaus Luther ; Gerd Marowsky ; Matti P. Rissanen ; Raimo Timonen ; J眉rgen Troe
• 刊名：Journal of Physical Chemistry A
• 出版年：2015
• 出版时间：July 16, 2015
• 年：2015
• 卷：119
• 期：28
• 页码：7263-7269
• 全文大小：324K
• ISSN：1520-5215

文摘

The reaction C₂H₅ + O₂ (+ M) 鈫?C₂H₅O₂ (+ M) was studied at 298 K at pressures of the bath gas M = Ar between 100 and 1000 bar. The transition from the falloff curve of an energy transfer mechanism to a high pressure range with contributions from the radical complex mechanism was observed. Further experiments were done between 188 and 298 K in the bath gas M = He at pressures in the range 0.7鈥?.0 Torr. The available data are analyzed in terms of unimolecular rate theory. An improved analytical representation of the temperature and pressure dependence of the rate constant is given for conditions where the chemical activation process C₂H₅ + O₂ (+ M) 鈫?C₂H₄ + HO₂ (+ M) is only of minor importance.