Estimation of the influence of the mass transfer conditions in studies of gas-liquid reactions by the gasometric method

✍ Scribed by Björnbom, Pehr

• Publisher: Wiley (John Wiley & Sons)
• Year: 2007
• Tongue: English
• Weight: 604 KB
• Volume: 24
• Category: Article
• ISSN: 0375-9210
• DOI: 10.1002/jctb.2720240102

✦ Synopsis

Abstract

The purpose of this investigation was to study a method for estimating the influence of the mass transfer conditions in gas—liquid reactions studied by the gasometric method. Theoretically it is shown, that when a reaction is taking place in the slow reaction regime, the initial gas absorption rate is higher than later on in the reaction, since an accumulation of the gaseous reactant, dissolved in the liquid phase, must occur immediately after the contact between the gas and the liquid. This effect is typical for the slow reaction regime. The rate of the initial gas absorption can be used to calculate the degree of saturation of the liquid at any moment. Furthermore, the error in gasometric measurements due to changes in the rate of reaction is discussed and a formula is derived, which permits calculation of this error from the absorption curve. In the experimental part the use of this method is demonstrated on the liquid‐phase oxidation of benzaldehyde in acetic acid solution.