首页|Study on thermal decomposition kinetics of azobenzene-4,4'-dicarboxylic acid by using compensation parameter method and nonlinear fitting evaluation
Study on thermal decomposition kinetics of azobenzene-4,4'-dicarboxylic acid by using compensation parameter method and nonlinear fitting evaluation
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Recently, azobenzene-4,4'-dicarboxylic acid (ADCA) has been produced gradually for use as an organic synthesis or pharmaceutical intermediate due to its eminent performance. With large quantities put into application in the future, the thermal stability of this substance during storage, transportation, and use will become quite important. Thus, in this work, the thermal decomposition behavior, thermal decom-position kinetics, and thermal hazard of ADCA were investigated. Experiments were conducted by using a SENSYS evo DSC device. A combination of differential iso-conversion method, compensation parameter method, and nonlinear fitting evaluation were also used to analyze thermal kinetics and mechanism of ADCA decomposition. The results show that when conversion rate a increases, the acti-vation energies of ADCA's first and main decomposition peaks fall. The amount of heat released during decomposition varies between 182.46 and 231.16 J·g-1. The proposed kinetic equation is based on the Avrami-Erofeev model, which is consistent with the decomposition progress. Applying the Frank-Kamenetskii model, a calculated self-accelerating decomposition temperature of 287.0 ℃ is obtained.
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