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以热重-差热法(TG-DTG)为手段,研究配合物[Co(phendione)(SO4)(H2O)].5H2O非等温热分解过程动力学。结果表明,标题配合物第一阶段热分解为相界控制反应(三维)机理,表观活化能为59.85 kJ.mol-1,指前因子lnA为16.36,反应速率方程为dα/dt=Ae-(E1-α)2/3。第四阶段热分解过程为成核和生长机理,表观活化能为203.11 kJ.mol-1,指前因子lnA为27.46,反应速率方程为dα/dt=0.25Ae-(E1-α)/[-ln(1-α)]-3。
The thermodynamic and thermogravimetry (TG-DTG) method was used to study the kinetics of the non-isothermal thermal decomposition of the complex [Co (phendione) (SO4) (H2O)] 5H2O. The results showed that the first phase of the title complex was thermally decomposed into the phase boundary reaction (3-D) mechanism. The apparent activation energy was 59.85 kJ · mol-1 and the pre-exponential factor lnA was 16.36. The reaction rate equation was dα / dt = Ae- (E1-α) 2/3. The thermal decomposition process in the fourth stage was nucleation and growth mechanism. The apparent activation energy was 203.11 kJ · mol-1, the pre-exponential factor lnA was 27.46 and the reaction rate equation was dα / dt = 0.25Ae- (E1-α) / [ -ln (1-α)] - 3.