Round robin test on the kinetic evaluation of a complex solid state reaction from 13 European laboratories. Part 1. Kinetic TG-analysis

In 1994 the decomposition of calciumoxalate monohydrate as a three-step rea ction has been investigated by 13 labs using the TG-method. The authors wor king group performed objective kinetic evaluations of 144 TG data sets obta ined from the same charge of substance in different laboratories. A non-lin ear optimization procedure was applied for different reaction models to per form single and overall optimizations. The results were analyzed critically on the basis of real model concepts for the course of the dehydration, the CO-split off and of the CO2-split off respectively. The results allow an o ptimistic assessment for the application of kinetic procedures to solid sta te reactions with well-known chemical course investigated by TG. (C) 1999 E lsevier Science B.V. All rights reserved.