双等双步法对二水合草酸镁的脱水过程的动力学研究

Study on Dehydration Process Kinetics Parameters of Magnesium Oxalate Dihydrate with Double Equal-Double Steps Method

对MgC2O4.2H2O的脱水过程的非等温动力学进行了研究.采用双等双步法得到了其动力学三因子:活化能、指前因子和机理函数.同时也得到了其峰温处的活化焓ΔH,活化自由能ΔG和活化熵ΔS分别为88.01kJ.mol-1,122.04kJ.mol-1,-68.79J.mol.K-1.

The dehydration process kinetics of magnesium oxalate dihydrate has been studied under the non-isothermal condition by double equal-double steps method.The kinetic triplet-the activation energy E,the pre-exponential A and the mechanisms function are obtained for the dehydration process.The enthalpy of activationΔH^≠,Gibbs free energy of activationΔG^≠and entropy of activationΔS^≠at the peak temperature are 88.01 kJ·mol^-1,122.04 kJ·mol^-1,and-68.79 J·mol·K^-1,respectively.