Kinetics of dehydration decomposition of C8H5O4NNa2·H2O in non-isothermal conditions
ZHANG Guo-chun1,2,QIAO Cheng-fang1,ZHOU Chun-sheng1,CHEN San-ping2,GAO Sheng-li2*
(1 Department of Chemistry &Chemical Engineering of Shangluo University, Shangluo 726000, Shaanxi ,China; 2 Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, Ministry of Education, College ofChemistry & Materials Science, Northwest University, Xi′an 710069,Shaanxi,China)
Abstract:
Using integral and differential methods based on model-free isoconversional methods，the kinetic parameters (the apparent activation energy Ea, the pre-exponential factor A and the most probable kinetic model function) of the dehydration decomposition for solid compound C8H5O4NNa2·H2O were obtained by means of DSC techniques at four different heating rates.The most probable kinetic model function of the dehydration decomposition is related to chemical reaction, the apparent activation energy Ea is 200.22 kJ/mol and the pre-exponential factor A is 3.63×1022/s.
KeyWords:
sodium 5-aminoisophthalic acid monohydrate; thermal analysis kenitic; model-free isoconversional method
