FALSE ISOKINETIC RELATIONSHIPS FOUND IN THE NONISOTHERMAL DECOMPOSITION OF SOLIDS

Three types of false isokinetic relationships (IKR) arising due to var iation of (i) reaction model, (ii) conversion, (iii) heating rate are discussed. Both the origin of IKRs and the meaning of the isokinetic t emperature (T-iso) is elucidated. It is shown that IKRs (ii) and (iii) in nonisothermal reactions are inherent only to multi-step processes. T-iso evaluated from an IKR (i) is a temperature related to a specifi c conversion. T-iso evaluated from IKRs (ii) and (iii) is an arbitrary temperature within the temperature region of the process provided tha t a valid reaction model is used to describe the kinetics of the proce ss.