热重分析法研究氢氧化镁纳米粉体的非等温分解动力学

doi:10.3969/j.issn.0438-1157.2014.02.030

化工学报 ›› 2014, Vol. 65 ›› Issue (2): 576-582.DOI: 10.3969/j.issn.0438-1157.2014.02.030

• 催化、动力学与反应器 • 上一篇下一篇

热重分析法研究氢氧化镁纳米粉体的非等温分解动力学

李歌¹, 李增和¹, 马鸿文², 陈登利³

1 北京化工大学理学院, 北京 100029;
2 中国地质大学矿物材料国家专业实验室, 北京 100083;
3 中国石油辽阳石化亿方工业公司, 辽宁辽阳 111003

收稿日期:2013-04-14 修回日期:2013-09-18 出版日期:2014-02-05 发布日期:2014-02-05
通讯作者: 李增和
基金资助:
中央高校基本科研业务费项目（ZY1348）。

Non-isothermal decomposition kinetics of nano-Mg(OH)₂ using thermal gravimetric analysis

LI Ge¹, LI Zenghe¹, MA Hongwen², CHEN Dengli³

1 College of Science, Beijing University of Chemical Technology, Beijing 100029, China;
2 National Laboratory of Mineral Materials, China University of Geosciences, Beijing 100083, China;
3 Liaoyang Petrochemical Yifang Industries Corp., China National Petroleum Corporation, Liaoyang 111003, Liaoning, China

Received:2013-04-14 Revised:2013-09-18 Online:2014-02-05 Published:2014-02-05
Supported by:
supported by the Fundamental Research Funds for the China Central Universities (ZY1348).

摘要/Abstract

摘要： 以白云石为原料，盐酸酸溶后得到CaCl₂-MgCl₂滤液，采用氨水直接沉淀法制备出符合HG/T 3607—2000Ⅰ型标准的六方片状的纳米氢氧化镁。六方片厚度为25～30 nm，直径为0.3～0.4 mm。利用热重分析法对纳米氢氧化镁在不同升温速率下的热分解动力学进行研究，以期深入了解纳米氢氧化镁热分解制备纳米氧化镁粉体过程的物理化学本质。采用Kissinger法和Ozawa法计算出氢氧化镁热分解反应活化能分别为115.47 kJ·mol^-1和126.04 kJ·mol^-1。对热重分析数据进行处理和拟合，判断纳米氢氧化镁粉体热分解反应机理函数为Avrami-Erofeev（n=1.5）的随机成核和随后生长机理。指前因子为3.077×10¹⁰ s^-1。纳米氢氧化镁经煅烧制备得到的氧化镁纳米球的直径为80～100 nm。

关键词: 纳米氢氧化镁, 热重分析, 热分解, 动力学, 纳米氧化镁

Abstract: Hexagonal nano-magnesium hydroxide with thickness of 25—30 nm and diameter of 0.3—0.4 μm was synthesized via acid immersion and ammonia precipitation from dolomites. Its quality met the standards of typeⅠ in HG/ T 3607—2000. The thermal decomposition kinetics of Mg(OH)₂ was investigated by using thermal gravimetric analysis at different heating rates for deep understanding of physical chemistry in this process. The activation energies of decomposition estimated by the Kissinger and Ozawa methods were 115.47 kJ·mol^-1 and 126.04 kJ·mol^-1 respectively. Decomposition reaction of magnesium hydroxide was controlled by Avrami-Erofeev function (n=1.5). Pre-exponential was 3.077×10¹⁰ s^-1. Nano-magnesium oxide with average diameter of 80—100 nm was prepared after calcination of magnesium hydroxide.

Key words: nano-magnesium hydroxide, thermal gravimetric analysis, thermal decomposition, kinetics, nano- magnesium oxide

中图分类号:

TQ028.8

李歌, 李增和, 马鸿文, 陈登利. 热重分析法研究氢氧化镁纳米粉体的非等温分解动力学[J]. 化工学报, 2014, 65(2): 576-582.

LI Ge, LI Zenghe, MA Hongwen, CHEN Dengli. Non-isothermal decomposition kinetics of nano-Mg(OH)₂ using thermal gravimetric analysis[J]. CIESC Journal, 2014, 65(2): 576-582.

参考文献 21

[1]	Hu Qingfu(胡庆福). Production and Application of Magnesium Compounds(镁化合物生产与应用) [M]. Beijing：Chemical Industry Press, 2004
[2]	Li Zhenxing, Chen Jianming, Song Yunhua. Rod-like magnesium hydroxide preparation[J]. Chinese J. Inorg. Chem., 2010, 26(1): 8-12
[3]	Jing Diance(景殿策), Wang Baohe(王宝和), Zhang Wei(张伟). Preparation and thermal decomposition kinetics of magnesium hydroxide nano-particles[J]. China Powder Sci. Technol. (中国粉体技术), 2006, 5：24-27
[4]	Yue Linhai, Jin Dalai, Lü Deyi, Xu Zhude. The non- isothermal kinetic analysis of thermal decomposition of Mg(OH)2 [J]. Acta Physico-chimica Sinica, 2005, 21 (7): 752-757
[5]	Li Longgang(李陇岗), Yang Jianyuan(杨建元), Zhong Hui(钟辉). Studies on the kinetic mechanism of Mg(OH)2 thermo-decomposition [J]. Salt Lake Research(盐湖研究), 2006, 1(14)：39-42
[6]	Ning Zhiqiang(宁志强), Zhai Yuchun(翟玉春), Sun Liqin(孙立芹). Study on the thermal decomposition kinetics of magnesium hydroxide[J]. J. Mol. Sci. (分子科学学报), 2009, 25(1):27-30
[7]	Lu Shaoyan(路绍琰), Li Xianguo(李先国), Wang Licong(王俐聪). Influence of preparation conditions on the composition and morphology of magnesium hydroxide and basic magnesium chloride[J]. Chem. Ind. Eng. Prog. (化工进展),2013, 32(4)：857-862
[8]	Halikia I, Economacou A. Application of various methods of nonisothermal kinetic analysis to magnesium hydroxide decomposition [J]. International J. Chem. Kinetics, 1993, 25(4): 609-631
[9]	Halikia I, Neou-syngounap K. Isothermal kinetic analysis of the thermal decomposition of magnesium hydroxide using thermogravimetric data[J].Thermo. Chimica Acta, 1998,320：75-88
[10]	Liu Ye(刘烨), Jing Diance(景殿策), Wang Baohe(王宝和). Study on the preparation and thermal decomposition dynamics of magnesium hydroxide nanorods[J]. Henan Chem. Indus. (河南化工), 2008, 25：25-27
[11]	Boris V, Alexander V N, Alexey O D. Mechanism of thermal decomposition of magnesium hydroxide [J].Thermo Chimica Acta, 1998, 315：135-143
[12]	Tomoko Y, Tsunehiro T, Hishida S. Study on the dehydration process of magnesium hydroxide [J]. Physica B, 1995(209): 581-582
[13]	Ranaivosoloarimanana A, Quiniou T, Meyer M. X-Ray diffraction analysis for isothermal annealed powder Mg(OH)2 [J]. Physica B, 2009, 404：3655-3661
[14]	Song Xingfu(宋兴福), Wang Jin(汪瑾), Luo Yan(罗妍). Thermal decomposition and non-isothermal kinetic evaluation of magnesium chloride hexammoniate[J]. Journal of Chemical Industry and Engineering(China) (化工学报), 2008, 59(9)：2255-2259
[15]	Zhai Xueliang(翟学良).The study of the thermal decomposition mechanism of Mg(OH)2[J]. Multipurpose Utilization of Mineral Resources(矿产综合利用),2000,3:11-14
[16]	Li Ge(李歌), Ma Hongwen(马鸿文), Jiang Xiaoqian(姜晓谦), Yao Wengui(姚文贵), Su Shuangqing(苏双青). Preparation of nano-sized magnesium hydroxide from dolomites by acid immersing [J]. J. Synth. Cryst. (人工晶体学报), 2011, 40(2)：510-515
[17]	Li Ge,Li Zenghe, Ma Hongwen,Jiang Xiaoqian, Yao Wengui. Preparation of magnesia nanoballs from dolomite[J]. Integrated Ferroelectrics, 2013, 145: 170-177
[18]	Bagchi T P, Sen P K. Kinetics of densification of powder compacts during the initial stage of sintering with constant rates of heating. A thermal analysis approach(Ⅱ): Haematite compacts[J]. Thermochimica Acta, 1981, 15:175
[19]	Criado J M, Ortega A. Clarification of some kinetic concepts in solid state reactions[J]. Thermochimica Acta, 1992, 195:163-166
[20]	Hu Rongzu(胡荣祖), Shi Qizhen(史启祯). Thermal Analysis Kinetics(热分析动力学) [M]. Beijing：Science Press, 2008：47-148
[21]	Zhang K Q, An Y, Zhang L, Dong Q. Preparation of controlled nano-MgO and investigation of its bactericidal properties[J]. Chemosphere, 2012, 89: 1414-1418

热重分析法研究氢氧化镁纳米粉体的非等温分解动力学

Non-isothermal decomposition kinetics of nano-Mg(OH)₂ using thermal gravimetric analysis

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献 21

相关文章 15

编辑推荐

Metrics

本文评价

[1]	金正浩, 封立杰, 李舒宏. 氨水溶液交叉型再吸收式热泵的能量及分析[J]. 化工学报, 2023, 74(S1): 53-63.
[2]	程成, 段钟弟, 孙浩然, 胡海涛, 薛鸿祥. 表面微结构对析晶沉积特性影响的格子Boltzmann模拟[J]. 化工学报, 2023, 74(S1): 74-86.
[3]	肖明堃, 杨光, 黄永华, 吴静怡. 浸没孔液氧气泡动力学数值研究[J]. 化工学报, 2023, 74(S1): 87-95.
[4]	毕丽森, 刘斌, 胡恒祥, 曾涛, 李卓睿, 宋健飞, 吴翰铭. 粗糙界面上纳米液滴蒸发模式的分子动力学研究[J]. 化工学报, 2023, 74(S1): 172-178.
[5]	于宏鑫, 邵双全. 水结晶过程的分子动力学模拟分析[J]. 化工学报, 2023, 74(S1): 250-258.
[6]	范孝雄, 郝丽芳, 范垂钢, 李松庚. LaMnO₃/生物炭催化剂低温NH₃-SCR催化脱硝性能研究[J]. 化工学报, 2023, 74(9): 3821-3830.
[7]	郑佳丽, 李志会, 赵新强, 王延吉. 离子液体催化合成2-氰基呋喃反应动力学研究[J]. 化工学报, 2023, 74(9): 3708-3715.
[8]	汪林正, 陆俞冰, 张睿智, 罗永浩. 基于分子动力学模拟的VOCs热氧化特性分析[J]. 化工学报, 2023, 74(8): 3242-3255.
[9]	曾如宾, 沈中杰, 梁钦锋, 许建良, 代正华, 刘海峰. 基于分子动力学模拟的Fe₂O₃纳米颗粒烧结机制研究[J]. 化工学报, 2023, 74(8): 3353-3365.
[10]	李锦潼, 邱顺, 孙文寿. 煤浆法烟气脱硫中草酸和紫外线强化煤砷浸出过程[J]. 化工学报, 2023, 74(8): 3522-3532.
[11]	杨越, 张丹, 郑巨淦, 涂茂萍, 杨庆忠. NaCl水溶液喷射闪蒸-掺混蒸发的实验研究[J]. 化工学报, 2023, 74(8): 3279-3291.
[12]	张蒙蒙, 颜冬, 沈永峰, 李文翠. 电解液类型对双离子电池阴阳离子储存行为的影响[J]. 化工学报, 2023, 74(7): 3116-3126.
[13]	何宣志, 何永清, 闻桂叶, 焦凤. 磁液液滴颈部自相似破裂行为[J]. 化工学报, 2023, 74(7): 2889-2897.
[14]	卫雪岩, 钱勇. 微米级铁粉燃料中低温氧化反应特性及其动力学研究[J]. 化工学报, 2023, 74(6): 2624-2638.
[15]	周继鹏, 何文军, 李涛. 异形催化剂上乙烯催化氧化失活动力学反应工程计算[J]. 化工学报, 2023, 74(6): 2416-2426.

热重分析法研究氢氧化镁纳米粉体的非等温分解动力学

Non-isothermal decomposition kinetics of nano-Mg(OH)2 using thermal gravimetric analysis

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献 21

相关文章 15

编辑推荐

Metrics

本文评价

Non-isothermal decomposition kinetics of nano-Mg(OH)₂ using thermal gravimetric analysis