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

作　　者：张彩霞[1] 任宁[2] 张洁 张存英[4] 

机构地区：[1]石家庄学院物理系,河北石家庄050035 [2]邯郸学院化学系,河北邯郸056005 [3]华北制药集团爱诺有限公司,河北石家庄052165 [4]石家庄第一中学,河北石家庄050016

出　　处：《河北北方学院学报（自然科学版）》2009年第5期23-26,共4页Journal of Hebei North University:Natural Science Edition

基　　金：河北省自然科学基金项目(B2007000237)

摘　　要：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.

关 键 词：二水合草酸镁 非等温动力学 脱水过程 TG-DTG 双等双步法 

分 类 号：O643.1[理学—物理化学]