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采用程序升温法研究Na2SO4.0.5H2O2.H2O在氮气中的热分解动力学,测定Na2SO4.0.5H2O2.H2O分解的TG-DTG和TG-DSC曲线.在8.0 K.min-1、6.1 K.min-1、4.1 K.min-1和2.0 K.min-14个升温速率下,Na2SO4.0.5H2O2.H2O的热分解是简单的一步反应,热分解温度为339.5 K.采用多元非线性回归对Na2SO4.0.5H2O2.H2O在氮气中的热分解动力学模型进行筛选,并利用主曲线法对其分解模型进行判别.Na2SO4.0.5H2O2.H2O的热分解过程受三维相界面控制,分解机理为R3机理.Na2SO4.0.5H2O2.H2O的热分解活化能为70.83 KJ.mol-1,指前因子1.96×103.
The pyrolysis kinetics of Na2SO4.0.5H2O2.H2O in nitrogen was studied by the temperature programmed method, and the TG-DTG and TG-DSC curves of Na2SO4.0.5H2O2.H2O decomposition were determined. At 8.0 K.min-1, 1.6 K.min -1, 4.1 K.min-1 and 2.0 K.min-14 heating rate, the thermal decomposition of Na2SO4.0.5H2O2.H2O is a simple one-step reaction with a thermal decomposition temperature of 339.5 K. The multivariate nonlinear regression was used to evaluate the effect of Na2SO4 .0.5H2O2.H2O was thermally decomposed in nitrogen, and the main curve method was used to determine the decomposition model.The thermal decomposition process of Na 2 SO 4 .5H 2 O 2 .H 2 O was controlled by three-dimensional phase interface. The decomposition mechanism was R3 .Na2SO4.0.5H2O2.H2O thermal decomposition activation energy of 70.83 KJ.mol-1, pre-factor 1.96 × 103.