Using temperature-programmed reaction for kinetics analysis of liquid-phase reactions

✍ Scribed by Lee F. Brown; Bruce A. Robinson

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 678 KB
• Volume: 41
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(86)87181-0

✦ Synopsis

Temperature-programmed reaction (TPR) is shown to be a practical method for determining raactionrate expressions and kinetics parameters for liquid-phase chemical reactions. By measuring reaction extent during a temperature rise, information normally obtained from a series of isothermal kinetics experiments can be found in a single TPR Lest. Using nonlinear least-squares regression eliminates the need for a constant temperature-rise rate, and enables reactions with significant heat effects to be tasted. Use of experimental pressures above atmospheric can extend TPR temperature ranges so that experiments can be carried out within a reasonable time for most reactions. Simulations of TPR with random measurement error are used to assess the tachnique's accuracy and to identify the best values of operating parameters. Comparing TPR with isothermal methods shows the latter may be slightly more accurate for the same number of data points, but TPR is far faster and experimentally simpler, and more data points can be taken in a given time period, Two TPR experiments measuring alkaline ethyl-acetate hydrolysis show the technique's applicability.