A Mass-spectrometric study of propionaldehyde oxidation in the negative temperature coefficient region

✍ Scribed by E. W. Kaiser

• Publisher: John Wiley and Sons
• Year: 1983
• Tongue: English
• Weight: 822 KB
• Volume: 15
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.550151005

✦ Synopsis

The oxidation of propionaldehyde has been investigated in a l-L Pyrex reactor at total pressures of 50-120 torr and temperatures 553-713 K. Detection of reactants and products was principally by molecular beam mass spectrometry, although certain species could only be measured by gas-chromatographic analysis. At 553 K the yield of water was -83% of the propionaldehyde consumed, leading to the conclusion that OH is the principal chain carrier near the beginning of the negative temperature coefficient region. Many oxygenated organics (CH20, CH3CH0, CzHsOH, CzH502H, CH3OzH) and CzH4 are formed during the oxidation process. These oxidation products are consistent with the important role of 0 2 addition to C2H5 radicals at 553 K followed by subsequent reactions of the C2H5O2 radical. As the temperature is increased, the product Concentrations smoothly change to a much simpler distribution in which CzH4, HzOz, and CO are the dominant products.