Published February 20, 2018
| Version v1
Publication
Kissinger kinetic analysis of data obtained under different heating schedules
Description
The dynamic heating rate method developed by TA Instruments (
Hi-Res
™
) is a kind of sample
controlled thermal analysis in which a linear relati
onship between the logarith
m of the heating rate
and the rate of weight change is imposed. It is s
hown in this paper that the reacted fraction at the
maximum reaction rate strongly depends
on the parameters selected for the
Hi-Res
heating
algorithm, what invalidates the use of
the Kissinger method for analysing
Hi-Res
data unless that
the reaction fits a first order kinetic law. Only in this latter case, it has been demonstrated that it is
not required that a constant value of the reacted fr
action at the maximum reaction rate is fulfilled for
determining the activation energy from the Kissi
nger method. In such a case the Kissinger plot
gives the real activation energy, independently of
both the heating schedule used and the value of
the reacted fraction,
α
m
, at the maximum.
Additional details
Identifiers
- URL
- https://idus.us.es/handle//11441/70456
- URN
- urn:oai:idus.us.es:11441/70456