Na_2O-Al_2O_3-SiO_2-H_2O体系生成水化石榴石的非等温动力学  

Non-isothermal Generation Kinetics of Hydrogarnet in Na_2O-Al_2O_3-SiO_2-H_2O System

作　　者：朱小峰[1] 张廷安[1] 李晓琪[1] 吕国志[1] 潘璐[2] 

机构地区：[1]东北大学材料与冶金学院,沈阳110819 [2]中国恩菲工程技术有限公司,北京100038

出　　处：《有色金属（冶炼部分）》2015年第11期47-50,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金联合基金重点项目(U1202274);国家自然科学基金青年基金项目(51204040)

摘　　要：利用高压DSC(HP-DSC)研究了Na2O-Al2O3-SiO2-H2O体系中生成水化石榴石的反应动力学。采用微分方程法对DSC曲线进行了分析,得到了该反应的动力学参数。结果表明,水化石榴石生成反应的表观活化能为191.17kJ/mol,指前因子为2.767 3s-1,其反应机理为随机成核和随后生长,并符合Mample单行法则。Generation kinetics of hydrogarnet in Na2O-Al2O3-SiO2-H2O system was investigated by High- pressure Differential Scanning Calorimetry （HP-DSC）. Kinetics parameters of reaction were obtained by analysis on DSC curves with differential equation method. The results show that the apparent activation energy and pre-exponential constant of this reaction are 191.17 kJ/mol and 2. 767 3 s-1 respectively. The reaction mechanism includes random nucleation and growth in accordance with Mample single rule.

关 键 词：水化石榴石 高压DSC 动力学 活化能 

分 类 号：TQ031.2[化学工程]