Kinetics Study on the Thermal Decomposition of Europium p-methyl-benzoate Complex with 1,10-penanthroline under Non-isothermal Con-ditions

摘要

The thermal decomposition reaction of Eu2(P-MBA)6(PHEN)2 (P-MBA=CH3C6H4COO, methylbenzoate; PHEN=C12H8N2, 1,10-phenanthroline) was studied in a static atmosphere using TG-DTG method. The thermal decom- position process of the complex was determined and its kinetics was investigated. Kinetic parameters were obtained from the analysis of TG-DTG curves by means of the Achar method and the Madhusudanan-Krishnan-Ninan (MKN ) method. The most probable mechanism functions of the thermal decomposition reaction for the first stage are: f(a) = (1-a)2, g(a) = (1-a)-1 - 1. The activation energy for the first stage is 255. 18 kJ/mol, the entropy of activation △S is 227.32 J/mol and the Gibbs free energy of activation △G is 128.04 kJ/mol.