A COMPARATIVE-STUDY OF THE RESOLVING POWER OF BOTH CONVENTIONAL THERMOGRAVIMETRY AND CONSTANT RATE THERMAL-ANALYSIS

According to literature data, constant rate thermal analysis (CRTA) has a higher resolving power for discriminating overlapping processes than the conventional TG method. However, taking into account that the heating rate and constant reaction rate concepts are quite different, it is of interest to propose a standardization procedure for comparing the results obtained from both methods. The present theoretical kinetic study points out that CRTA and TG have very similar discriminating power, provided that both the heating rate for the TG curve and the constant reaction rate for the CRTA curve are selected in such a way that the total time required for carrying out the reaction in the range 0.05 less-than-or-equal-to alpha less-than-or-equal-to 0.95 is the same in both cases.