应用化学 ›› 2024, Vol. 41 ›› Issue (5): 668-676.DOI: 10.19894/j.issn.1000-0518.230298

• 研究论文 • 上一篇    下一篇

NH4Al(SO42·12H2O脱水过程及其热力学与动力学性能

胡彪1,2, 王会1,2(), 张振迎2(), 薛道荣3, 刘抢3   

  1. 1.中国科学院过程工程研究所,介科学与工程全国重点实验室,北京 100190
    2.华北理工大学建筑工程学院,唐山 063210
    3.河北道荣新能源科技有限公司,邢台 054700
  • 收稿日期:2023-09-26 接受日期:2024-03-13 出版日期:2024-05-01 发布日期:2024-06-03
  • 通讯作者: 王会,张振迎
  • 基金资助:
    河北省省级科技计划项目(22294301Z);赤峰市区域协同创新平台科技合作项目(2022zk002)

Dehydration Process of Ammonium Aluminum Sulfate Dodecahydrate and Its Thermodynamics and Kinetics Research

Biao HU1,2, Hui WANG1,2(), Zhen-Ying ZHANG2(), Dao-Rong XUE3, Qiang LIU3   

  1. 1.State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Science,Beijing 100190,China
    2.College of Architecture and Engineering,North China University of Science and Technology,Tangshan 063210,China
    3.Hebei Daorong New Energy Technology Co. ,Xingtai 054700,China
  • Received:2023-09-26 Accepted:2024-03-13 Published:2024-05-01 Online:2024-06-03
  • Contact: Hui WANG,Zhen-Ying ZHANG
  • About author:zhangzhenying@ncst.edu.cn
    13126591892@163.com
  • Supported by:
    the S&T Program of Hebei(22294301Z);the Science and Technology Cooperation Program of Chifeng Regional Collaborative Innovation Platform(2022zk002)

摘要:

通过热重-差热分析仪(TG/DTA)测试了NH4Al(SO42·12H2O的升温脱水过程,并对其脱水过程进行热力学和动力学分析。 结果表明,NH4Al(SO42·12H2O的脱水过程分为2步,第1次脱去9个水分子,形成NH4Al(SO42·3H2O; 第2次脱去剩余的3个水分子,形成NH4Al(SO42。 热力学分析NH4Al(SO42·12H2O脱水过程中,脱落的液态水分子随即气化。 动力学分析NH4Al(SO42·12H2O脱水过程,脱去9个水分子的反应活化能为93.53 kJ/mol,脱去3个水分子的反应活化能为118.7 kJ/mol。

关键词: NH4Al(SO42·12H2O, 脱水过程, 热力学, 动力学

Abstract:

The dehydration process of NH4Al(SO42·12H2O under the heating stage was tested by thermogravimetric-differential thermal analysis (TG-DTA), and the dehydration process was analyzed by the thermodynamical and kinetic methods. The results showed that the dehydration process of NH4Al(SO42·12H2O was divided into two steps. In the first step, 9 water molecules were dehydrated from NH4Al(SO42·12H2O to form NH4Al(SO42·3H2O; the remaining 3 water molecules were dehydrated and it became to NH4Al(SO42. Thermodynamic analysis of NH4Al(SO42·12H2O dehydration process showed that the shed liquid water molecules were then vaporized. Kinetic analysis of NH4Al(SO42·12H2O dehydration process indicated that the reaction activation energy of 93.53 kJ/mol for the removal of 9 water molecules, and the activation energy of 118.7 kJ/mol for the removal of 3 water molecules.

Key words: Ammonium aluminum sulfate dodecahydrate, Dehydration process, Thermodynamics, Dynamics

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